Patchwork Combine location with block using block_locations

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Submitter Dehao Chen
Date Aug. 1, 2012, 5:35 a.m.
Message ID <CAO2gOZXFkCpuFqXpPw6ju14BB=RBdt-kDhKsJgk4N41=Q19VHw@mail.gmail.com>
Download mbox | patch
Permalink /patch/174390/
State New
Headers show

Comments

Dehao Chen - Aug. 1, 2012, 5:35 a.m.
Hi,

This patch:

* Integrates location with block into an integrated index.
* Removes gimple->gsbase.block and tree->exp.block fields.
* Updates inline/clone as well as tree liveness analysis to ensure the
associated blocks are updated correctly.

With this patch, the association between source location and its block
are greatly enhanced, which produces much better inline stack in the
debug info.

Bootstrapped and regression tested on x86.

OK for trunk?

Thanks,
Dehao

You can also find the patch in http://codereview.appspot.com/6454077

gcc/ChangeLog
2012-08-01  Dehao Chen  <dehao@google.com>

	* toplev.c (general_init): Init block_locations.
	* tree.c (tree_set_block): New.
	(tree_block): Change to use LOCATION_BLOCK.
	* tree.h (TREE_SET_BLOCK): New.
	* final.c (reemit_insn_block_notes): Change to use LOCATION_BLOCK.
	(final_start_function): Likewise.
	* input.c (expand_location_1): Likewise.
	* input.h (LOCATION_LOCUS): New.
	(LOCATION_BLOCK): New.
	(IS_UNKNOWN_LOCATION): New.
	* fold-const.c (expr_location_or): Change to use new location.
	* reorg.c (emit_delay_sequence): Likewise.
	(try_merge_delay_insns): Likewise.
	* modulo-sched.c (dump_insn_location): Likewise.
	* lto-streamer-out.c (lto_output_location_bitpack): Likewise.
	* jump.c (rtx_renumbered_equal_p): Likewise.
	* ifcvt.c (noce_try_move): Likewise.
	(noce_try_store_flag): Likewise.
	(noce_try_store_flag_constants): Likewise.
	(noce_try_addcc): Likewise.
	(noce_try_store_flag_mask): Likewise.
	(noce_try_cmove): Likewise.
	(noce_try_cmove_arith): Likewise.
	(noce_try_minmax): Likewise.
	(noce_try_abs): Likewise.
	(noce_try_sign_mask): Likewise.
	(noce_try_bitop): Likewise.
	(noce_process_if_block): Likewise.
	(cond_move_process_if_block): Likewise.
	(find_cond_trap): Likewise.
	* dewarf2out.c (add_src_coords_attributes): Likewise.
	* expr.c (expand_expr_real): Likewise.
	* tree-parloops.c (create_loop_fn): Likewise.
	* recog.c (peep2_attempt): Likewise.
	* function.c (free_after_compilation): Likewise.
	(expand_function_end): Likewise.
	(set_insn_locations): Likewise.
	(thread_prologue_and_epilogue_insns): Likewise.
	* print-rtl.c (print_rtx): Likewise.
	* profile.c (branch_prob): Likewise.
	* trans-mem.c (ipa_tm_scan_irr_block): Likewise.
	* gimplify.c (gimplify_call_expr): Likewise.
	* except.c (duplicate_eh_regions_1): Likewise.
	* emit-rtl.c (try_split): Likewise.
	(make_insn_raw): Likewise.
	(make_debug_insn_raw): Likewise.
	(make_jump_insn_raw): Likewise.
	(make_call_insn_raw): Likewise.
	(emit_pattern_after_setloc): Likewise.
	(emit_pattern_after): Likewise.
	(emit_debug_insn_after): Likewise.
	(emit_pattern_before): Likewise.
	(emit_insn_before_setloc): Likewise.
	(emit_jump_insn_before): Likewise.
	(emit_call_insn_before_setloc): Likewise.
	(emit_call_insn_before): Likeise.
	(emit_debug_insn_before_setloc): Likewise.
	(emit_copy_of_insn_after): Likewise.
	(insn_locators_alloc): Remove.
	(insn_locators_finalize): Remove.
	(insn_locators_free): Remove.
	(set_curr_insn_source_location): Remove.
	(get_curr_insn_source_location): Remove.
	(set_curr_insn_block): Remove.
	(get_curr_insn_block): Remove.
	(locator_scope): Remove.
	(insn_scope): Change to use new location.
	(locator_location): Remove.
	(insn_line): Change to use new location.
	(locator_file): Remove.
	(insn_file): Change to use new location.
	(locator_eq): Remove.
	(insn_locations_init): New.
	(insn_locations_finalize): New.
	(set_curr_insn_location): New.
	(curr_insn_location): New.
	* cfgexpand.c (gimple_assign_rhs_to_tree): Change to use new location.
	(expand_gimple_cond): Likewise.
	(expand_call_stmt): Likewise.
	(expand_gimple_stmt_1): Likewise.
	(expand_gimple_basic_block): Likewise.
	(construct_exit_block): Likewise.
	(gimple_expand_cfg): Likewise.
	* cfgcleanup.c (try_forward_edges): Likewise.
	* tree-ssa-live.c (remove_unused_scope_block_p): Likewise.
	(dump_scope_block): Likewise.
	(remove_unused_locals): Likewise.
	* lto/lto.c (lto_fixup_prevailing_decls): Likewise.
	* rtl.c (rtx_equal_p_cb): Likewise.
	(rtx_equal_p): Likewise.
	* rtl.h (XUINT): New.
	(INSN_LOCATOR): Remove.
	(CURR_INSN_LOCATION): Remove.
	(INSN_LOCATION): New.
	(INSN_HAS_LOCATION): New.
	* tree-inline.c (remap_gimple_op_r): Change to use new location.
	(copy_tree_body_r): Likewise.
	(copy_phis_for_bb): Likewise.
	(expand_call_inline): Likewise.
	* tree-streamer-in.c (lto_input_ts_exp_tree_pointers): Likewise.
	* combine.c (try_combine): Likewise.
	* tree-outof-ssa.c (set_location_for_edge): Likewise.
	(insert_partition_copy_on_edge): Likewise.
	(insert_value_copy_on_edge): Likewise.
	(insert_rtx_to_part_on_edge): Likewise.
	(insert_part_to_rtx_on_edge): Likewise.
	* basic-block.h (edge_def): Remove field.
	* gimple.h (gimple_statement_base): Remove field.
	(gimple_bb): Change to use new location.
	(gimple_set_block): Likewise.
	(gimple_has_location): Likewise.
	* tree-cfg.c (make_cond_expr_edges): Likewise.
	(make_goto_expr_edges): Likewise.
	(gimple_can_merge_blocks_p): Likewise.
	(move_stmt_op): Likewise.
	(move_block_to_fn): Likewise.
	* config/alpha/alpha.c (alpha_output_mi_thunk_osf): Likewise.
	* config/sparc/sparc.c (sparc_output_mi_thunk): Likewise.
	* config/i386/i386.c (x86_output_mi_thunk): Likewise.
	* config/tilegx/tilegx.c (tilegx_output_mi_thunk): Likewise.
	* config/sh/sh.c (sh_output_mi_thunk): Likewise.
	* config/ia64/ia64.c (ia64_output_mi_thunk): Likewise.
	* config/rs6000/rs6000.c (rs6000_output_mi_thunk): Likewise.
	* config/score/score.c (score_output_mi_thunk): Likewise.
	* config/tilepro/tilepro.c (tilepro_asm_output_mi_thunk): Likewise.
	* config/mips/mips.c (mips_output_mi_thunk): Likewise.
	* cfgrtl.c (unique_locus_on_edge_between_p): Likewise.
	(unique_locus_on_edge_between_p): Likewise.
	(emit_nop_for_unique_locus_between): Likewise.
	(force_nonfallthru_and_redirect): Likewise.
	(fixup_reorder_chain): Likewise.
	(cfg_layout_merge_blocks): Likewise.
	* stmt.c (emit_case_nodes): Likewise.

libcpp/ChangeLog
2012-08-01  Dehao Chen  <dehao@google.com>

	* include/line-map.h (MAX_SOURCE_LOCATION): New value.
	(location_block_init): New.
	(location_block_fini): New.
	(get_combine_location): New.
	(get_block_from_location): New.
	(get_locus_from_location): New.
	(COMBINE_LOCATION): New.
	(IS_COMBINED_LOCATION): New.
	(expanded_location): New field.
	* line-map.c (location_block): New.
	(location_block_htab): New.
	(curr_combined_location): New.
	(location_blocks): New.
	(allocated_location_blocks): New.
	(location_block_hash): New.
	(location_block_eq): New.
	(location_block_update): New.
	(get_combine_location): New.
	(get_block_from_location): New.
	(get_locus_from_location): New.
	(location_block_init): New.
	(location_block_fini): New.
	(linemap_lookup): Change to use new location.
	(linemap_ordinary_map_lookup): Likewise.
	(linemap_macro_map_lookup): Likewise.
	(linemap_macro_map_loc_to_def_point): Likewise.
	(linemap_macro_map_loc_unwind_toward_spel): Likewise.
	(linemap_get_expansion_line): Likewise.
	(linemap_get_expansion_filename): Likewise.
	(linemap_location_in_system_header_p): Likewise.
	(linemap_location_from_macro_expansion_p): Likewise.
	(linemap_macro_loc_to_spelling_point): Likewise.
	(linemap_macro_loc_to_def_point): Likewise.
	(linemap_macro_loc_to_exp_point): Likewise.
	(linemap_resolve_location): Likewise.
	(linemap_unwind_toward_expansion): Likewise.
	(linemap_unwind_to_first_non_reserved_loc): Likewise.
	(linemap_expand_location): Likewise.
	(linemap_dump_location): Likewise.
Richard Guenther - Aug. 1, 2012, 6:07 p.m.
On Wed, Aug 1, 2012 at 7:35 AM, Dehao Chen <dehao@google.com> wrote:
> Hi,
>
> This patch:
>
> * Integrates location with block into an integrated index.
> * Removes gimple->gsbase.block and tree->exp.block fields.
> * Updates inline/clone as well as tree liveness analysis to ensure the
> associated blocks are updated correctly.
>
> With this patch, the association between source location and its block
> are greatly enhanced, which produces much better inline stack in the
> debug info.
>
> Bootstrapped and regression tested on x86.
>
> OK for trunk?

Nice.  But the LTO changes mean that you simply drop all BLOCK
associations on the floor ...
they at least look very incomplete.  Did you actually run LTO tests?

lto/ has its own ChangeLog and I wonder why no frontends are affected
by this patch?

Richard.

> Thanks,
> Dehao
>
> You can also find the patch in http://codereview.appspot.com/6454077
>
> gcc/ChangeLog
> 2012-08-01  Dehao Chen  <dehao@google.com>
>
>         * toplev.c (general_init): Init block_locations.
>         * tree.c (tree_set_block): New.
>         (tree_block): Change to use LOCATION_BLOCK.
>         * tree.h (TREE_SET_BLOCK): New.
>         * final.c (reemit_insn_block_notes): Change to use LOCATION_BLOCK.
>         (final_start_function): Likewise.
>         * input.c (expand_location_1): Likewise.
>         * input.h (LOCATION_LOCUS): New.
>         (LOCATION_BLOCK): New.
>         (IS_UNKNOWN_LOCATION): New.
>         * fold-const.c (expr_location_or): Change to use new location.
>         * reorg.c (emit_delay_sequence): Likewise.
>         (try_merge_delay_insns): Likewise.
>         * modulo-sched.c (dump_insn_location): Likewise.
>         * lto-streamer-out.c (lto_output_location_bitpack): Likewise.
>         * jump.c (rtx_renumbered_equal_p): Likewise.
>         * ifcvt.c (noce_try_move): Likewise.
>         (noce_try_store_flag): Likewise.
>         (noce_try_store_flag_constants): Likewise.
>         (noce_try_addcc): Likewise.
>         (noce_try_store_flag_mask): Likewise.
>         (noce_try_cmove): Likewise.
>         (noce_try_cmove_arith): Likewise.
>         (noce_try_minmax): Likewise.
>         (noce_try_abs): Likewise.
>         (noce_try_sign_mask): Likewise.
>         (noce_try_bitop): Likewise.
>         (noce_process_if_block): Likewise.
>         (cond_move_process_if_block): Likewise.
>         (find_cond_trap): Likewise.
>         * dewarf2out.c (add_src_coords_attributes): Likewise.
>         * expr.c (expand_expr_real): Likewise.
>         * tree-parloops.c (create_loop_fn): Likewise.
>         * recog.c (peep2_attempt): Likewise.
>         * function.c (free_after_compilation): Likewise.
>         (expand_function_end): Likewise.
>         (set_insn_locations): Likewise.
>         (thread_prologue_and_epilogue_insns): Likewise.
>         * print-rtl.c (print_rtx): Likewise.
>         * profile.c (branch_prob): Likewise.
>         * trans-mem.c (ipa_tm_scan_irr_block): Likewise.
>         * gimplify.c (gimplify_call_expr): Likewise.
>         * except.c (duplicate_eh_regions_1): Likewise.
>         * emit-rtl.c (try_split): Likewise.
>         (make_insn_raw): Likewise.
>         (make_debug_insn_raw): Likewise.
>         (make_jump_insn_raw): Likewise.
>         (make_call_insn_raw): Likewise.
>         (emit_pattern_after_setloc): Likewise.
>         (emit_pattern_after): Likewise.
>         (emit_debug_insn_after): Likewise.
>         (emit_pattern_before): Likewise.
>         (emit_insn_before_setloc): Likewise.
>         (emit_jump_insn_before): Likewise.
>         (emit_call_insn_before_setloc): Likewise.
>         (emit_call_insn_before): Likeise.
>         (emit_debug_insn_before_setloc): Likewise.
>         (emit_copy_of_insn_after): Likewise.
>         (insn_locators_alloc): Remove.
>         (insn_locators_finalize): Remove.
>         (insn_locators_free): Remove.
>         (set_curr_insn_source_location): Remove.
>         (get_curr_insn_source_location): Remove.
>         (set_curr_insn_block): Remove.
>         (get_curr_insn_block): Remove.
>         (locator_scope): Remove.
>         (insn_scope): Change to use new location.
>         (locator_location): Remove.
>         (insn_line): Change to use new location.
>         (locator_file): Remove.
>         (insn_file): Change to use new location.
>         (locator_eq): Remove.
>         (insn_locations_init): New.
>         (insn_locations_finalize): New.
>         (set_curr_insn_location): New.
>         (curr_insn_location): New.
>         * cfgexpand.c (gimple_assign_rhs_to_tree): Change to use new location.
>         (expand_gimple_cond): Likewise.
>         (expand_call_stmt): Likewise.
>         (expand_gimple_stmt_1): Likewise.
>         (expand_gimple_basic_block): Likewise.
>         (construct_exit_block): Likewise.
>         (gimple_expand_cfg): Likewise.
>         * cfgcleanup.c (try_forward_edges): Likewise.
>         * tree-ssa-live.c (remove_unused_scope_block_p): Likewise.
>         (dump_scope_block): Likewise.
>         (remove_unused_locals): Likewise.
>         * lto/lto.c (lto_fixup_prevailing_decls): Likewise.
>         * rtl.c (rtx_equal_p_cb): Likewise.
>         (rtx_equal_p): Likewise.
>         * rtl.h (XUINT): New.
>         (INSN_LOCATOR): Remove.
>         (CURR_INSN_LOCATION): Remove.
>         (INSN_LOCATION): New.
>         (INSN_HAS_LOCATION): New.
>         * tree-inline.c (remap_gimple_op_r): Change to use new location.
>         (copy_tree_body_r): Likewise.
>         (copy_phis_for_bb): Likewise.
>         (expand_call_inline): Likewise.
>         * tree-streamer-in.c (lto_input_ts_exp_tree_pointers): Likewise.
>         * combine.c (try_combine): Likewise.
>         * tree-outof-ssa.c (set_location_for_edge): Likewise.
>         (insert_partition_copy_on_edge): Likewise.
>         (insert_value_copy_on_edge): Likewise.
>         (insert_rtx_to_part_on_edge): Likewise.
>         (insert_part_to_rtx_on_edge): Likewise.
>         * basic-block.h (edge_def): Remove field.
>         * gimple.h (gimple_statement_base): Remove field.
>         (gimple_bb): Change to use new location.
>         (gimple_set_block): Likewise.
>         (gimple_has_location): Likewise.
>         * tree-cfg.c (make_cond_expr_edges): Likewise.
>         (make_goto_expr_edges): Likewise.
>         (gimple_can_merge_blocks_p): Likewise.
>         (move_stmt_op): Likewise.
>         (move_block_to_fn): Likewise.
>         * config/alpha/alpha.c (alpha_output_mi_thunk_osf): Likewise.
>         * config/sparc/sparc.c (sparc_output_mi_thunk): Likewise.
>         * config/i386/i386.c (x86_output_mi_thunk): Likewise.
>         * config/tilegx/tilegx.c (tilegx_output_mi_thunk): Likewise.
>         * config/sh/sh.c (sh_output_mi_thunk): Likewise.
>         * config/ia64/ia64.c (ia64_output_mi_thunk): Likewise.
>         * config/rs6000/rs6000.c (rs6000_output_mi_thunk): Likewise.
>         * config/score/score.c (score_output_mi_thunk): Likewise.
>         * config/tilepro/tilepro.c (tilepro_asm_output_mi_thunk): Likewise.
>         * config/mips/mips.c (mips_output_mi_thunk): Likewise.
>         * cfgrtl.c (unique_locus_on_edge_between_p): Likewise.
>         (unique_locus_on_edge_between_p): Likewise.
>         (emit_nop_for_unique_locus_between): Likewise.
>         (force_nonfallthru_and_redirect): Likewise.
>         (fixup_reorder_chain): Likewise.
>         (cfg_layout_merge_blocks): Likewise.
>         * stmt.c (emit_case_nodes): Likewise.
>
> libcpp/ChangeLog
> 2012-08-01  Dehao Chen  <dehao@google.com>
>
>         * include/line-map.h (MAX_SOURCE_LOCATION): New value.
>         (location_block_init): New.
>         (location_block_fini): New.
>         (get_combine_location): New.
>         (get_block_from_location): New.
>         (get_locus_from_location): New.
>         (COMBINE_LOCATION): New.
>         (IS_COMBINED_LOCATION): New.
>         (expanded_location): New field.
>         * line-map.c (location_block): New.
>         (location_block_htab): New.
>         (curr_combined_location): New.
>         (location_blocks): New.
>         (allocated_location_blocks): New.
>         (location_block_hash): New.
>         (location_block_eq): New.
>         (location_block_update): New.
>         (get_combine_location): New.
>         (get_block_from_location): New.
>         (get_locus_from_location): New.
>         (location_block_init): New.
>         (location_block_fini): New.
>         (linemap_lookup): Change to use new location.
>         (linemap_ordinary_map_lookup): Likewise.
>         (linemap_macro_map_lookup): Likewise.
>         (linemap_macro_map_loc_to_def_point): Likewise.
>         (linemap_macro_map_loc_unwind_toward_spel): Likewise.
>         (linemap_get_expansion_line): Likewise.
>         (linemap_get_expansion_filename): Likewise.
>         (linemap_location_in_system_header_p): Likewise.
>         (linemap_location_from_macro_expansion_p): Likewise.
>         (linemap_macro_loc_to_spelling_point): Likewise.
>         (linemap_macro_loc_to_def_point): Likewise.
>         (linemap_macro_loc_to_exp_point): Likewise.
>         (linemap_resolve_location): Likewise.
>         (linemap_unwind_toward_expansion): Likewise.
>         (linemap_unwind_to_first_non_reserved_loc): Likewise.
>         (linemap_expand_location): Likewise.
>         (linemap_dump_location): Likewise.
>
> Index: gcc/tree.c
> ===================================================================
> --- gcc/tree.c  (revision 189835)
> +++ gcc/tree.c  (working copy)
> @@ -3765,7 +3765,6 @@
>    TREE_TYPE (t) = type;
>    SET_EXPR_LOCATION (t, UNKNOWN_LOCATION);
>    TREE_OPERAND (t, 0) = node;
> -  TREE_BLOCK (t) = NULL_TREE;
>    if (node && !TYPE_P (node))
>      {
>        TREE_SIDE_EFFECTS (t) = TREE_SIDE_EFFECTS (node);
> @@ -10867,17 +10866,28 @@
>  }
>
>
> -tree *
> +tree
>  tree_block (tree t)
>  {
>    char const c = TREE_CODE_CLASS (TREE_CODE (t));
>
>    if (IS_EXPR_CODE_CLASS (c))
> -    return &t->exp.block;
> +    return LOCATION_BLOCK (t->exp.locus);
>    gcc_unreachable ();
>    return NULL;
>  }
>
> +void
> +tree_set_block (tree t, tree b)
> +{
> +  char const c = TREE_CODE_CLASS (TREE_CODE (t));
> +
> +  if (IS_EXPR_CODE_CLASS (c))
> +    t->exp.locus = COMBINE_LOCATION (t->exp.locus, b);
> +  else
> +    gcc_unreachable ();
> +}
> +
>  /* Create a nameless artificial label and put it in the current
>     function context.  The label has a location of LOC.  Returns the
>     newly created label.  */
> Index: gcc/tree.h
> ===================================================================
> --- gcc/tree.h  (revision 189835)
> +++ gcc/tree.h  (working copy)
> @@ -999,7 +999,8 @@
>
>  #endif
>
> -#define TREE_BLOCK(NODE)               *(tree_block (NODE))
> +#define TREE_BLOCK(NODE)               (tree_block (NODE))
> +#define TREE_SET_BLOCK(T, B)           (tree_set_block ((T), (B)))
>
>  #include "tree-check.h"
>
> @@ -1702,7 +1703,7 @@
>  #define EXPR_LOCATION(NODE) \
>    (CAN_HAVE_LOCATION_P ((NODE)) ? (NODE)->exp.locus : UNKNOWN_LOCATION)
>  #define SET_EXPR_LOCATION(NODE, LOCUS) EXPR_CHECK ((NODE))->exp.locus = (LOCUS)
> -#define EXPR_HAS_LOCATION(NODE) (EXPR_LOCATION (NODE) != UNKNOWN_LOCATION)
> +#define EXPR_HAS_LOCATION(NODE) (!IS_UNKNOWN_LOCATION (EXPR_LOCATION (NODE)))
>  /* The location to be used in a diagnostic about this expression.  Do not
>     use this macro if the location will be assigned to other expressions.  */
>  #define EXPR_LOC_OR_HERE(NODE) (EXPR_HAS_LOCATION (NODE) ?
> (NODE)->exp.locus : input_location)
> @@ -1881,7 +1882,7 @@
>                                               OMP_CLAUSE_PRIVATE,       \
>                                               OMP_CLAUSE_COPYPRIVATE), 0)
>  #define OMP_CLAUSE_HAS_LOCATION(NODE) \
> -  ((OMP_CLAUSE_CHECK (NODE))->omp_clause.locus != UNKNOWN_LOCATION)
> +  (!IS_UNKNOWN_LOCATION ((OMP_CLAUSE_CHECK (NODE))->omp_clause.locus))
>  #define OMP_CLAUSE_LOCATION(NODE)  (OMP_CLAUSE_CHECK (NODE))->omp_clause.locus
>
>  /* True on an OMP_SECTION statement that was the last lexical member.
> @@ -1972,7 +1973,6 @@
>  struct GTY(()) tree_exp {
>    struct tree_typed typed;
>    location_t locus;
> -  tree block;
>    tree GTY ((special ("tree_exp"),
>              desc ("TREE_CODE ((tree) &%0)")))
>      operands[1];
> @@ -5164,7 +5164,7 @@
>  static inline bool
>  inlined_function_outer_scope_p (const_tree block)
>  {
> - return BLOCK_SOURCE_LOCATION (block) != UNKNOWN_LOCATION;
> + return !IS_UNKNOWN_LOCATION (BLOCK_SOURCE_LOCATION (block));
>  }
>
>  /* Loop over all function arguments of FNTYPE.  In each iteration, PTR is set
> @@ -5539,7 +5539,8 @@
>  extern HOST_WIDE_INT int_cst_value (const_tree);
>  extern HOST_WIDEST_INT widest_int_cst_value (const_tree);
>
> -extern tree *tree_block (tree);
> +extern tree tree_block (tree);
> +extern void tree_set_block (tree, tree);
>  extern location_t *block_nonartificial_location (tree);
>  extern location_t tree_nonartificial_location (tree);
>
> Index: gcc/final.c
> ===================================================================
> --- gcc/final.c (revision 189835)
> +++ gcc/final.c (working copy)
> @@ -1605,7 +1605,7 @@
>                                              insn_scope (XVECEXP (body, 0, i)));
>         }
>        if (! this_block)
> -       continue;
> +       this_block = DECL_INITIAL (cfun->decl);
>
>        if (this_block != cur_block)
>         {
> @@ -1640,8 +1640,8 @@
>
>    this_is_asm_operands = 0;
>
> -  last_filename = locator_file (prologue_locator);
> -  last_linenum = locator_line (prologue_locator);
> +  last_filename = LOCATION_FILE (prologue_location);
> +  last_linenum = LOCATION_LINE (prologue_location);
>    last_discriminator = discriminator = 0;
>
>    high_block_linenum = high_function_linenum = last_linenum;
> Index: gcc/input.c
> ===================================================================
> --- gcc/input.c (revision 189835)
> +++ gcc/input.c (working copy)
> @@ -51,6 +51,13 @@
>    expanded_location xloc;
>    const struct line_map *map;
>    enum location_resolution_kind lrk = LRK_MACRO_EXPANSION_POINT;
> +  tree block = NULL;
> +
> +  if (IS_COMBINED_LOCATION (loc))
> +    {
> +      block = LOCATION_BLOCK (loc);
> +      loc = LOCATION_LOCUS (loc);
> +    }
>
>    memset (&xloc, 0, sizeof (xloc));
>
> @@ -74,6 +81,7 @@
>        xloc = linemap_expand_location (line_table, map, loc);
>      }
>
> +  xloc.block = block;
>    if (loc <= BUILTINS_LOCATION)
>      xloc.file = loc == UNKNOWN_LOCATION ? NULL : _("<built-in>");
>
> Index: gcc/input.h
> ===================================================================
> --- gcc/input.h (revision 189835)
> +++ gcc/input.h (working copy)
> @@ -51,6 +51,14 @@
>  #define LOCATION_FILE(LOC) ((expand_location (LOC)).file)
>  #define LOCATION_LINE(LOC) ((expand_location (LOC)).line)
>  #define LOCATION_COLUMN(LOC)((expand_location (LOC)).column)
> +#define LOCATION_LOCUS(LOC) \
> +  ((IS_COMBINED_LOCATION(LOC)) ? get_locus_from_location (LOC) : (LOC))
> +#define LOCATION_BLOCK(LOC) \
> +  ((tree) ((IS_COMBINED_LOCATION (LOC)) ? get_block_from_location (LOC) \
> +  : NULL))
> +#define IS_UNKNOWN_LOCATION(LOC) \
> +  ((IS_COMBINED_LOCATION (LOC)) ? get_locus_from_location (LOC) == 0 \
> +  : (LOC) == 0)
>
>  #define input_line LOCATION_LINE (input_location)
>  #define input_filename LOCATION_FILE (input_location)
> Index: gcc/fold-const.c
> ===================================================================
> --- gcc/fold-const.c    (revision 189835)
> +++ gcc/fold-const.c    (working copy)
> @@ -145,7 +145,7 @@
>  expr_location_or (tree t, location_t loc)
>  {
>    location_t tloc = EXPR_LOCATION (t);
> -  return tloc != UNKNOWN_LOCATION ? tloc : loc;
> +  return IS_UNKNOWN_LOCATION (tloc) ? loc : tloc;
>  }
>
>  /* Similar to protected_set_expr_location, but never modify x in place,
> Index: gcc/toplev.c
> ===================================================================
> --- gcc/toplev.c        (revision 189835)
> +++ gcc/toplev.c        (working copy)
> @@ -1140,6 +1140,7 @@
>    linemap_init (line_table);
>    line_table->reallocator = realloc_for_line_map;
>    line_table->round_alloc_size = ggc_round_alloc_size;
> +  location_block_init ();
>    init_ttree ();
>
>    /* Initialize register usage now so switches may override.  */
> @@ -1946,6 +1947,7 @@
>    invoke_plugin_callbacks (PLUGIN_FINISH, NULL);
>
>    finalize_plugins ();
> +  location_block_fini ();
>    if (seen_error ())
>      return (FATAL_EXIT_CODE);
>
> Index: gcc/reorg.c
> ===================================================================
> --- gcc/reorg.c (revision 189835)
> +++ gcc/reorg.c (working copy)
> @@ -545,7 +545,7 @@
>    INSN_DELETED_P (delay_insn) = 0;
>    PREV_INSN (delay_insn) = PREV_INSN (seq_insn);
>
> -  INSN_LOCATOR (seq_insn) = INSN_LOCATOR (delay_insn);
> +  INSN_LOCATION (seq_insn) = INSN_LOCATION (delay_insn);
>
>    for (li = list; li; li = XEXP (li, 1), i++)
>      {
> @@ -561,9 +561,9 @@
>
>        /* SPARC assembler, for instance, emit warning when debug info is output
>           into the delay slot.  */
> -      if (INSN_LOCATOR (tem) && !INSN_LOCATOR (seq_insn))
> -       INSN_LOCATOR (seq_insn) = INSN_LOCATOR (tem);
> -      INSN_LOCATOR (tem) = 0;
> +      if (INSN_LOCATION (tem) && !INSN_LOCATION (seq_insn))
> +       INSN_LOCATION (seq_insn) = INSN_LOCATION (tem);
> +      INSN_LOCATION (tem) = 0;
>
>        for (note = REG_NOTES (tem); note; note = next)
>         {
> @@ -4087,7 +4087,7 @@
>      for (link = crtl->epilogue_delay_list;
>           link;
>           link = XEXP (link, 1))
> -      INSN_LOCATOR (XEXP (link, 0)) = 0;
> +      INSN_LOCATION (XEXP (link, 0)) = 0;
>    }
>
>  #endif
> Index: gcc/modulo-sched.c
> ===================================================================
> --- gcc/modulo-sched.c  (revision 189835)
> +++ gcc/modulo-sched.c  (working copy)
> @@ -1246,9 +1246,9 @@
>  /* Dump file:line from INSN's location info to dump_file.  */
>
>  static void
> -dump_insn_locator (rtx insn)
> +dump_insn_location (rtx insn)
>  {
> -  if (dump_file && INSN_LOCATOR (insn))
> +  if (dump_file && INSN_LOCATION (insn))
>      {
>        const char *file = insn_file (insn);
>        if (file)
> @@ -1282,7 +1282,7 @@
>           rtx insn = BB_END (loop->header);
>
>           fprintf (dump_file, "SMS loop many exits");
> -         dump_insn_locator (insn);
> +         dump_insn_location (insn);
>           fprintf (dump_file, "\n");
>         }
>        return false;
> @@ -1295,7 +1295,7 @@
>           rtx insn = BB_END (loop->header);
>
>           fprintf (dump_file, "SMS loop many BBs.");
> -         dump_insn_locator (insn);
> +         dump_insn_location (insn);
>           fprintf (dump_file, "\n");
>         }
>        return false;
> @@ -1421,7 +1421,7 @@
>           rtx insn = BB_END (loop->header);
>
>           fprintf (dump_file, "SMS loop num: %d", loop->num);
> -         dump_insn_locator (insn);
> +         dump_insn_location (insn);
>           fprintf (dump_file, "\n");
>         }
>
> @@ -1450,7 +1450,7 @@
>         {
>           if (dump_file)
>             {
> -             dump_insn_locator (tail);
> +             dump_insn_location (tail);
>               fprintf (dump_file, "\nSMS single-bb-loop\n");
>               if (profile_info && flag_branch_probabilities)
>                 {
> @@ -1556,7 +1556,7 @@
>           rtx insn = BB_END (loop->header);
>
>           fprintf (dump_file, "SMS loop num: %d", loop->num);
> -         dump_insn_locator (insn);
> +         dump_insn_location (insn);
>           fprintf (dump_file, "\n");
>
>           print_ddg (dump_file, g);
> @@ -1571,7 +1571,7 @@
>
>        if (dump_file)
>         {
> -         dump_insn_locator (tail);
> +         dump_insn_location (tail);
>           fprintf (dump_file, "\nSMS single-bb-loop\n");
>           if (profile_info && flag_branch_probabilities)
>             {
> @@ -1714,7 +1714,7 @@
>
>            if (dump_file)
>              {
> -             dump_insn_locator (tail);
> +             dump_insn_location (tail);
>               fprintf (dump_file, " SMS succeeded %d %d (with ii, sc)\n",
>                        ps->ii, stage_count);
>               print_partial_schedule (ps, dump_file);
> Index: gcc/lto-streamer-out.c
> ===================================================================
> --- gcc/lto-streamer-out.c      (revision 189835)
> +++ gcc/lto-streamer-out.c      (working copy)
> @@ -155,6 +155,7 @@
>  {
>    expanded_location xloc;
>
> +  loc = LOCATION_LOCUS (loc);
>    bp_pack_value (bp, loc == UNKNOWN_LOCATION, 1);
>    if (loc == UNKNOWN_LOCATION)
>      return;
> Index: gcc/jump.c
> ===================================================================
> --- gcc/jump.c  (revision 189835)
> +++ gcc/jump.c  (working copy)
> @@ -1818,8 +1818,7 @@
>           if (XINT (x, i) != XINT (y, i))
>             {
>               if (((code == ASM_OPERANDS && i == 6)
> -                  || (code == ASM_INPUT && i == 1))
> -                 && locator_eq (XINT (x, i), XINT (y, i)))
> +                  || (code == ASM_INPUT && i == 1)))
>                 break;
>               return 0;
>             }
> Index: gcc/ifcvt.c
> ===================================================================
> --- gcc/ifcvt.c (revision 189835)
> +++ gcc/ifcvt.c (working copy)
> @@ -1019,7 +1019,7 @@
>             return FALSE;
>
>           emit_insn_before_setloc (seq, if_info->jump,
> -                                  INSN_LOCATOR (if_info->insn_a));
> +                                  INSN_LOCATION (if_info->insn_a));
>         }
>        return TRUE;
>      }
> @@ -1064,7 +1064,7 @@
>         return FALSE;
>
>        emit_insn_before_setloc (seq, if_info->jump,
> -                              INSN_LOCATOR (if_info->insn_a));
> +                              INSN_LOCATION (if_info->insn_a));
>        return TRUE;
>      }
>    else
> @@ -1195,7 +1195,7 @@
>         return FALSE;
>
>        emit_insn_before_setloc (seq, if_info->jump,
> -                              INSN_LOCATOR (if_info->insn_a));
> +                              INSN_LOCATION (if_info->insn_a));
>        return TRUE;
>      }
>
> @@ -1243,7 +1243,7 @@
>                 return FALSE;
>
>               emit_insn_before_setloc (seq, if_info->jump,
> -                                      INSN_LOCATOR (if_info->insn_a));
> +                                      INSN_LOCATION (if_info->insn_a));
>               return TRUE;
>             }
>           end_sequence ();
> @@ -1283,7 +1283,7 @@
>                 return FALSE;
>
>               emit_insn_before_setloc (seq, if_info->jump,
> -                                      INSN_LOCATOR (if_info->insn_a));
> +                                      INSN_LOCATION (if_info->insn_a));
>               return TRUE;
>             }
>           end_sequence ();
> @@ -1332,7 +1332,7 @@
>             return FALSE;
>
>           emit_insn_before_setloc (seq, if_info->jump,
> -                                  INSN_LOCATOR (if_info->insn_a));
> +                                  INSN_LOCATION (if_info->insn_a));
>           return TRUE;
>         }
>
> @@ -1481,7 +1481,7 @@
>             return FALSE;
>
>           emit_insn_before_setloc (seq, if_info->jump,
> -                                  INSN_LOCATOR (if_info->insn_a));
> +                                  INSN_LOCATION (if_info->insn_a));
>           return TRUE;
>         }
>        else
> @@ -1682,7 +1682,7 @@
>    if (!tmp)
>      return FALSE;
>
> -  emit_insn_before_setloc (tmp, if_info->jump, INSN_LOCATOR (if_info->insn_a));
> +  emit_insn_before_setloc (tmp, if_info->jump, INSN_LOCATION
> (if_info->insn_a));
>    return TRUE;
>
>   end_seq_and_fail:
> @@ -1929,7 +1929,7 @@
>    if (!seq)
>      return FALSE;
>
> -  emit_insn_before_setloc (seq, if_info->jump, INSN_LOCATOR (if_info->insn_a));
> +  emit_insn_before_setloc (seq, if_info->jump, INSN_LOCATION
> (if_info->insn_a));
>    if_info->cond = cond;
>    if_info->cond_earliest = earliest;
>
> @@ -2076,7 +2076,7 @@
>    if (!seq)
>      return FALSE;
>
> -  emit_insn_before_setloc (seq, if_info->jump, INSN_LOCATOR (if_info->insn_a));
> +  emit_insn_before_setloc (seq, if_info->jump, INSN_LOCATION
> (if_info->insn_a));
>    if_info->cond = cond;
>    if_info->cond_earliest = earliest;
>
> @@ -2155,7 +2155,7 @@
>    if (!seq)
>      return FALSE;
>
> -  emit_insn_before_setloc (seq, if_info->jump, INSN_LOCATOR (if_info->insn_a));
> +  emit_insn_before_setloc (seq, if_info->jump, INSN_LOCATION
> (if_info->insn_a));
>    return TRUE;
>  }
>
> @@ -2255,7 +2255,7 @@
>         return FALSE;
>
>        emit_insn_before_setloc (seq, if_info->jump,
> -                              INSN_LOCATOR (if_info->insn_a));
> +                              INSN_LOCATION (if_info->insn_a));
>      }
>    return TRUE;
>  }
> @@ -2656,7 +2656,7 @@
>        unshare_all_rtl_in_chain (seq);
>        end_sequence ();
>
> -      emit_insn_before_setloc (seq, BB_END (test_bb), INSN_LOCATOR (insn_a));
> +      emit_insn_before_setloc (seq, BB_END (test_bb), INSN_LOCATION (insn_a));
>      }
>
>    /* The original THEN and ELSE blocks may now be removed.  The test block
> @@ -2937,7 +2937,7 @@
>        loc_insn = first_active_insn (else_bb);
>        gcc_assert (loc_insn);
>      }
> -  emit_insn_before_setloc (seq, jump, INSN_LOCATOR (loc_insn));
> +  emit_insn_before_setloc (seq, jump, INSN_LOCATION (loc_insn));
>
>    if (else_bb)
>      {
> @@ -3655,7 +3655,7 @@
>      return FALSE;
>
>    /* Emit the new insns before cond_earliest.  */
> -  emit_insn_before_setloc (seq, cond_earliest, INSN_LOCATOR (trap));
> +  emit_insn_before_setloc (seq, cond_earliest, INSN_LOCATION (trap));
>
>    /* Delete the trap block if possible.  */
>    remove_edge (trap_bb == then_bb ? then_edge : else_edge);
> Index: gcc/dwarf2out.c
> ===================================================================
> --- gcc/dwarf2out.c     (revision 189835)
> +++ gcc/dwarf2out.c     (working copy)
> @@ -15506,7 +15506,7 @@
>  {
>    expanded_location s;
>
> -  if (DECL_SOURCE_LOCATION (decl) == UNKNOWN_LOCATION)
> +  if (IS_UNKNOWN_LOCATION (DECL_SOURCE_LOCATION (decl)))
>      return;
>    s = expand_location (DECL_SOURCE_LOCATION (decl));
>    add_AT_file (die, DW_AT_decl_file, lookup_filename (s.file));
> Index: gcc/expr.c
> ===================================================================
> --- gcc/expr.c  (revision 189835)
> +++ gcc/expr.c  (working copy)
> @@ -7802,19 +7802,14 @@
>    if (cfun && EXPR_HAS_LOCATION (exp))
>      {
>        location_t saved_location = input_location;
> -      location_t saved_curr_loc = get_curr_insn_source_location ();
> -      tree saved_block = get_curr_insn_block ();
> +      location_t saved_curr_loc = curr_insn_location ();
>        input_location = EXPR_LOCATION (exp);
> -      set_curr_insn_source_location (input_location);
> -
> -      /* Record where the insns produced belong.  */
> -      set_curr_insn_block (TREE_BLOCK (exp));
> +      set_curr_insn_location (input_location);
>
>        ret = expand_expr_real_1 (exp, target, tmode, modifier, alt_rtl);
>
>        input_location = saved_location;
> -      set_curr_insn_block (saved_block);
> -      set_curr_insn_source_location (saved_curr_loc);
> +      set_curr_insn_location (saved_curr_loc);
>      }
>    else
>      {
> Index: gcc/predict.c
> ===================================================================
> --- gcc/predict.c       (revision 189835)
> +++ gcc/predict.c       (working copy)
> @@ -2177,7 +2177,7 @@
>  {
>    unsigned nb_loops;
>
> -  loop_optimizer_init (0);
> +  loop_optimizer_init (LOOPS_NORMAL);
>    if (dump_file && (dump_flags & TDF_DETAILS))
>      flow_loops_dump (dump_file, NULL, 0);
>
> Index: gcc/tree-parloops.c
> ===================================================================
> --- gcc/tree-parloops.c (revision 189835)
> +++ gcc/tree-parloops.c (working copy)
> @@ -1415,6 +1415,7 @@
>    struct function *act_cfun = cfun;
>    static unsigned loopfn_num;
>
> +  loc = LOCATION_LOCUS (loc);
>    snprintf (buf, 100, "%s.$loopfn", current_function_name ());
>    ASM_FORMAT_PRIVATE_NAME (tname, buf, loopfn_num++);
>    clean_symbol_name (tname);
> Index: gcc/recog.c
> ===================================================================
> --- gcc/recog.c (revision 189835)
> +++ gcc/recog.c (working copy)
> @@ -3333,7 +3333,7 @@
>    /* Replace the old sequence with the new.  */
>    last = emit_insn_after_setloc (attempt,
>                                  peep2_insn_data[i].insn,
> -                                INSN_LOCATOR (peep2_insn_data[i].insn));
> +                                INSN_LOCATION (peep2_insn_data[i].insn));
>    before_try = PREV_INSN (insn);
>    delete_insn_chain (insn, peep2_insn_data[i].insn, false);
>
> Index: gcc/function.c
> ===================================================================
> --- gcc/function.c      (revision 189835)
> +++ gcc/function.c      (working copy)
> @@ -133,7 +133,7 @@
>  static void prepare_function_start (void);
>  static void do_clobber_return_reg (rtx, void *);
>  static void do_use_return_reg (rtx, void *);
> -static void set_insn_locators (rtx, int) ATTRIBUTE_UNUSED;
> +static void set_insn_locations (rtx, int) ATTRIBUTE_UNUSED;
>
>  /* Stack of nested functions.  */
>  /* Keep track of the cfun stack.  */
> @@ -200,7 +200,6 @@
>    f->cfg = NULL;
>
>    regno_reg_rtx = NULL;
> -  insn_locators_free ();
>  }
>
>  /* Return size needed for stack frame based on slots so far allocated.
> @@ -4979,7 +4978,7 @@
>               probe_stack_range (STACK_OLD_CHECK_PROTECT, max_frame_size);
>             seq = get_insns ();
>             end_sequence ();
> -           set_insn_locators (seq, prologue_locator);
> +           set_insn_locations (seq, prologue_location);
>             emit_insn_before (seq, stack_check_probe_note);
>             break;
>           }
> @@ -4994,7 +4993,7 @@
>
>    /* Output a linenumber for the end of the function.
>       SDB depends on this.  */
> -  set_curr_insn_source_location (input_location);
> +  set_curr_insn_location (input_location);
>
>    /* Before the return label (if any), clobber the return
>       registers so that they are not propagated live to the rest of
> @@ -5277,14 +5276,14 @@
>    *slot = copy;
>  }
>
> -/* Set the locator of the insn chain starting at INSN to LOC.  */
> +/* Set the location of the insn chain starting at INSN to LOC.  */
>  static void
> -set_insn_locators (rtx insn, int loc)
> +set_insn_locations (rtx insn, int loc)
>  {
>    while (insn != NULL_RTX)
>      {
>        if (INSN_P (insn))
> -       INSN_LOCATOR (insn) = loc;
> +       INSN_LOCATION (insn) = loc;
>        insn = NEXT_INSN (insn);
>      }
>  }
> @@ -5893,7 +5892,7 @@
>        end_sequence ();
>
>        record_insns (split_prologue_seq, NULL, &prologue_insn_hash);
> -      set_insn_locators (split_prologue_seq, prologue_locator);
> +      set_insn_locations (split_prologue_seq, prologue_location);
>  #endif
>      }
>
> @@ -5922,7 +5921,7 @@
>
>        prologue_seq = get_insns ();
>        end_sequence ();
> -      set_insn_locators (prologue_seq, prologue_locator);
> +      set_insn_locations (prologue_seq, prologue_location);
>      }
>  #endif
>
> @@ -6418,7 +6417,7 @@
>
>        /* Retain a map of the epilogue insns.  */
>        record_insns (seq, NULL, &epilogue_insn_hash);
> -      set_insn_locators (seq, epilogue_locator);
> +      set_insn_locations (seq, epilogue_location);
>
>        seq = get_insns ();
>        returnjump = get_last_insn ();
> @@ -6608,7 +6607,7 @@
>              avoid getting rid of sibcall epilogue insns.  Do this before we
>              actually emit the sequence.  */
>           record_insns (seq, NULL, &epilogue_insn_hash);
> -         set_insn_locators (seq, epilogue_locator);
> +         set_insn_locations (seq, epilogue_location);
>
>           emit_insn_before (seq, insn);
>         }
> Index: gcc/print-rtl.c
> ===================================================================
> --- gcc/print-rtl.c     (revision 189835)
> +++ gcc/print-rtl.c     (working copy)
> @@ -416,10 +416,10 @@
>         if (i == 5 && INSN_P (in_rtx))
>           {
>  #ifndef GENERATOR_FILE
> -           /*  Pretty-print insn locators.  Ignore scoping as it is mostly
> +           /*  Pretty-print insn locations.  Ignore scoping as it is mostly
>                 redundant with line number information and do not print anything
>                 when there is no location information available.  */
> -           if (INSN_LOCATOR (in_rtx) && insn_file (in_rtx))
> +           if (INSN_LOCATION (in_rtx) && insn_file (in_rtx))
>               fprintf(outfile, " %s:%i", insn_file (in_rtx), insn_line (in_rtx));
>  #endif
>           }
> @@ -427,16 +427,16 @@
>           {
>  #ifndef GENERATOR_FILE
>             fprintf (outfile, " %s:%i",
> -                    locator_file (ASM_OPERANDS_SOURCE_LOCATION (in_rtx)),
> -                    locator_line (ASM_OPERANDS_SOURCE_LOCATION (in_rtx)));
> +                    LOCATION_FILE (ASM_OPERANDS_SOURCE_LOCATION (in_rtx)),
> +                    LOCATION_LINE (ASM_OPERANDS_SOURCE_LOCATION (in_rtx)));
>  #endif
>           }
>         else if (i == 1 && GET_CODE (in_rtx) == ASM_INPUT)
>           {
>  #ifndef GENERATOR_FILE
>             fprintf (outfile, " %s:%i",
> -                    locator_file (ASM_INPUT_SOURCE_LOCATION (in_rtx)),
> -                    locator_line (ASM_INPUT_SOURCE_LOCATION (in_rtx)));
> +                    LOCATION_FILE (ASM_INPUT_SOURCE_LOCATION (in_rtx)),
> +                    LOCATION_LINE (ASM_INPUT_SOURCE_LOCATION (in_rtx)));
>  #endif
>           }
>         else if (i == 6 && NOTE_P (in_rtx))
> Index: gcc/profile.c
> ===================================================================
> --- gcc/profile.c       (revision 189835)
> +++ gcc/profile.c       (working copy)
> @@ -966,7 +966,7 @@
>              is not computed twice.  */
>           if (last
>               && gimple_has_location (last)
> -             && e->goto_locus != UNKNOWN_LOCATION
> +             && !IS_UNKNOWN_LOCATION (e->goto_locus)
>               && !single_succ_p (bb)
>               && (LOCATION_FILE (e->goto_locus)
>                   != LOCATION_FILE (gimple_location (last))
> @@ -976,7 +976,6 @@
>               basic_block new_bb = split_edge (e);
>               edge ne = single_succ_edge (new_bb);
>               ne->goto_locus = e->goto_locus;
> -             ne->goto_block = e->goto_block;
>             }
>           if ((e->flags & (EDGE_ABNORMAL | EDGE_ABNORMAL_CALL))
>                && e->dest != EXIT_BLOCK_PTR)
> @@ -1188,7 +1187,7 @@
>
>           /* Notice GOTO expressions eliminated while constructing the CFG.  */
>           if (single_succ_p (bb)
> -             && single_succ_edge (bb)->goto_locus != UNKNOWN_LOCATION)
> +             && !IS_UNKNOWN_LOCATION (single_succ_edge (bb)->goto_locus))
>             {
>               expanded_location curr_location
>                 = expand_location (single_succ_edge (bb)->goto_locus);
> Index: gcc/trans-mem.c
> ===================================================================
> --- gcc/trans-mem.c     (revision 189835)
> +++ gcc/trans-mem.c     (working copy)
> @@ -3796,7 +3796,6 @@
>             {
>               tree t = build1 (NOP_EXPR, void_type_node, size_zero_node);
>               SET_EXPR_LOCATION (t, gimple_location (stmt));
> -             TREE_BLOCK (t) = gimple_block (stmt);
>               error ("%Kasm not allowed in %<transaction_safe%> function", t);
>             }
>           return true;
> Index: gcc/gimplify.c
> ===================================================================
> --- gcc/gimplify.c      (revision 189835)
> +++ gcc/gimplify.c      (working copy)
> @@ -2600,7 +2600,6 @@
>             = CALL_EXPR_RETURN_SLOT_OPT (call);
>           CALL_FROM_THUNK_P (*expr_p) = CALL_FROM_THUNK_P (call);
>           SET_EXPR_LOCATION (*expr_p, EXPR_LOCATION (call));
> -         TREE_BLOCK (*expr_p) = TREE_BLOCK (call);
>
>           /* Set CALL_EXPR_VA_ARG_PACK.  */
>           CALL_EXPR_VA_ARG_PACK (*expr_p) = 1;
> Index: gcc/except.c
> ===================================================================
> --- gcc/except.c        (revision 189835)
> +++ gcc/except.c        (working copy)
> @@ -526,7 +526,10 @@
>        break;
>
>      case ERT_MUST_NOT_THROW:
> -      new_r->u.must_not_throw = old_r->u.must_not_throw;
> +      new_r->u.must_not_throw.failure_loc =
> +       LOCATION_LOCUS (old_r->u.must_not_throw.failure_loc);
> +      new_r->u.must_not_throw.failure_decl =
> +       old_r->u.must_not_throw.failure_decl;
>        break;
>      }
>
> Index: gcc/emit-rtl.c
> ===================================================================
> --- gcc/emit-rtl.c      (revision 189835)
> +++ gcc/emit-rtl.c      (working copy)
> @@ -3634,7 +3634,7 @@
>         }
>      }
>
> -  tem = emit_insn_after_setloc (seq, trial, INSN_LOCATOR (trial));
> +  tem = emit_insn_after_setloc (seq, trial, INSN_LOCATION (trial));
>
>    delete_insn (trial);
>    if (has_barrier)
> @@ -3670,7 +3670,7 @@
>    PATTERN (insn) = pattern;
>    INSN_CODE (insn) = -1;
>    REG_NOTES (insn) = NULL;
> -  INSN_LOCATOR (insn) = curr_insn_locator ();
> +  INSN_LOCATION (insn) = curr_insn_location ();
>    BLOCK_FOR_INSN (insn) = NULL;
>
>  #ifdef ENABLE_RTL_CHECKING
> @@ -3703,7 +3703,7 @@
>    PATTERN (insn) = pattern;
>    INSN_CODE (insn) = -1;
>    REG_NOTES (insn) = NULL;
> -  INSN_LOCATOR (insn) = curr_insn_locator ();
> +  INSN_LOCATION (insn) = curr_insn_location ();
>    BLOCK_FOR_INSN (insn) = NULL;
>
>    return insn;
> @@ -3723,7 +3723,7 @@
>    INSN_CODE (insn) = -1;
>    REG_NOTES (insn) = NULL;
>    JUMP_LABEL (insn) = NULL;
> -  INSN_LOCATOR (insn) = curr_insn_locator ();
> +  INSN_LOCATION (insn) = curr_insn_location ();
>    BLOCK_FOR_INSN (insn) = NULL;
>
>    return insn;
> @@ -3743,7 +3743,7 @@
>    INSN_CODE (insn) = -1;
>    REG_NOTES (insn) = NULL;
>    CALL_INSN_FUNCTION_USAGE (insn) = NULL;
> -  INSN_LOCATOR (insn) = curr_insn_locator ();
> +  INSN_LOCATION (insn) = curr_insn_location ();
>    BLOCK_FOR_INSN (insn) = NULL;
>
>    return insn;
> @@ -4416,8 +4416,8 @@
>    after = NEXT_INSN (after);
>    while (1)
>      {
> -      if (active_insn_p (after) && !INSN_LOCATOR (after))
> -       INSN_LOCATOR (after) = loc;
> +      if (active_insn_p (after) && !INSN_LOCATION (after))
> +       INSN_LOCATION (after) = loc;
>        if (after == last)
>         break;
>        after = NEXT_INSN (after);
> @@ -4440,62 +4440,62 @@
>        prev = PREV_INSN (prev);
>
>    if (INSN_P (prev))
> -    return emit_pattern_after_setloc (pattern, after, INSN_LOCATOR (prev),
> +    return emit_pattern_after_setloc (pattern, after, INSN_LOCATION (prev),
>                                       make_raw);
>    else
>      return emit_pattern_after_noloc (pattern, after, NULL, make_raw);
>  }
>
> -/* Like emit_insn_after_noloc, but set INSN_LOCATOR according to LOC.  */
> +/* Like emit_insn_after_noloc, but set INSN_LOCATION according to LOC.  */
>  rtx
>  emit_insn_after_setloc (rtx pattern, rtx after, int loc)
>  {
>    return emit_pattern_after_setloc (pattern, after, loc, make_insn_raw);
>  }
>
> -/* Like emit_insn_after_noloc, but set INSN_LOCATOR according to AFTER.  */
> +/* Like emit_insn_after_noloc, but set INSN_LOCATION according to AFTER.  */
>  rtx
>  emit_insn_after (rtx pattern, rtx after)
>  {
>    return emit_pattern_after (pattern, after, true, make_insn_raw);
>  }
>
> -/* Like emit_jump_insn_after_noloc, but set INSN_LOCATOR according to LOC.  */
> +/* Like emit_jump_insn_after_noloc, but set INSN_LOCATION according to LOC.  */
>  rtx
>  emit_jump_insn_after_setloc (rtx pattern, rtx after, int loc)
>  {
>    return emit_pattern_after_setloc (pattern, after, loc, make_jump_insn_raw);
>  }
>
> -/* Like emit_jump_insn_after_noloc, but set INSN_LOCATOR according to
> AFTER.  */
> +/* Like emit_jump_insn_after_noloc, but set INSN_LOCATION according
> to AFTER.  */
>  rtx
>  emit_jump_insn_after (rtx pattern, rtx after)
>  {
>    return emit_pattern_after (pattern, after, true, make_jump_insn_raw);
>  }
>
> -/* Like emit_call_insn_after_noloc, but set INSN_LOCATOR according to LOC.  */
> +/* Like emit_call_insn_after_noloc, but set INSN_LOCATION according to LOC.  */
>  rtx
>  emit_call_insn_after_setloc (rtx pattern, rtx after, int loc)
>  {
>    return emit_pattern_after_setloc (pattern, after, loc, make_call_insn_raw);
>  }
>
> -/* Like emit_call_insn_after_noloc, but set INSN_LOCATOR according to
> AFTER.  */
> +/* Like emit_call_insn_after_noloc, but set INSN_LOCATION according
> to AFTER.  */
>  rtx
>  emit_call_insn_after (rtx pattern, rtx after)
>  {
>    return emit_pattern_after (pattern, after, true, make_call_insn_raw);
>  }
>
> -/* Like emit_debug_insn_after_noloc, but set INSN_LOCATOR according to LOC.  */
> +/* Like emit_debug_insn_after_noloc, but set INSN_LOCATION according
> to LOC.  */
>  rtx
>  emit_debug_insn_after_setloc (rtx pattern, rtx after, int loc)
>  {
>    return emit_pattern_after_setloc (pattern, after, loc, make_debug_insn_raw);
>  }
>
> -/* Like emit_debug_insn_after_noloc, but set INSN_LOCATOR according
> to AFTER.  */
> +/* Like emit_debug_insn_after_noloc, but set INSN_LOCATION according
> to AFTER.  */
>  rtx
>  emit_debug_insn_after (rtx pattern, rtx after)
>  {
> @@ -4525,8 +4525,8 @@
>      first = NEXT_INSN (first);
>    while (1)
>      {
> -      if (active_insn_p (first) && !INSN_LOCATOR (first))
> -       INSN_LOCATOR (first) = loc;
> +      if (active_insn_p (first) && !INSN_LOCATION (first))
> +       INSN_LOCATION (first) = loc;
>        if (first == last)
>         break;
>        first = NEXT_INSN (first);
> @@ -4550,7 +4550,7 @@
>        next = PREV_INSN (next);
>
>    if (INSN_P (next))
> -    return emit_pattern_before_setloc (pattern, before, INSN_LOCATOR (next),
> +    return emit_pattern_before_setloc (pattern, before, INSN_LOCATION (next),
>                                        insnp, make_raw);
>    else
>      return emit_pattern_before_noloc (pattern, before,
> @@ -4558,7 +4558,7 @@
>                                        NULL, make_raw);
>  }
>
> -/* Like emit_insn_before_noloc, but set INSN_LOCATOR according to LOC.  */
> +/* Like emit_insn_before_noloc, but set INSN_LOCATION according to LOC.  */
>  rtx
>  emit_insn_before_setloc (rtx pattern, rtx before, int loc)
>  {
> @@ -4566,14 +4566,14 @@
>                                      make_insn_raw);
>  }
>
> -/* Like emit_insn_before_noloc, but set INSN_LOCATOR according to BEFORE.  */
> +/* Like emit_insn_before_noloc, but set INSN_LOCATION according to BEFORE.  */
>  rtx
>  emit_insn_before (rtx pattern, rtx before)
>  {
>    return emit_pattern_before (pattern, before, true, true, make_insn_raw);
>  }
>
> -/* like emit_insn_before_noloc, but set INSN_LOCATOR according to LOC.  */
> +/* like emit_insn_before_noloc, but set INSN_LOCATION according to LOC.  */
>  rtx
>  emit_jump_insn_before_setloc (rtx pattern, rtx before, int loc)
>  {
> @@ -4581,7 +4581,7 @@
>                                      make_jump_insn_raw);
>  }
>
> -/* Like emit_jump_insn_before_noloc, but set INSN_LOCATOR according
> to BEFORE.  */
> +/* Like emit_jump_insn_before_noloc, but set INSN_LOCATION according
> to BEFORE.  */
>  rtx
>  emit_jump_insn_before (rtx pattern, rtx before)
>  {
> @@ -4589,7 +4589,7 @@
>                               make_jump_insn_raw);
>  }
>
> -/* Like emit_insn_before_noloc, but set INSN_LOCATOR according to LOC.  */
> +/* Like emit_insn_before_noloc, but set INSN_LOCATION according to LOC.  */
>  rtx
>  emit_call_insn_before_setloc (rtx pattern, rtx before, int loc)
>  {
> @@ -4598,7 +4598,7 @@
>  }
>
>  /* Like emit_call_insn_before_noloc,
> -   but set insn_locator according to BEFORE.  */
> +   but set insn_location according to BEFORE.  */
>  rtx
>  emit_call_insn_before (rtx pattern, rtx before)
>  {
> @@ -4606,7 +4606,7 @@
>                               make_call_insn_raw);
>  }
>
> -/* Like emit_insn_before_noloc, but set INSN_LOCATOR according to LOC.  */
> +/* Like emit_insn_before_noloc, but set INSN_LOCATION according to LOC.  */
>  rtx
>  emit_debug_insn_before_setloc (rtx pattern, rtx before, int loc)
>  {
> @@ -4615,7 +4615,7 @@
>  }
>
>  /* Like emit_debug_insn_before_noloc,
> -   but set insn_locator according to BEFORE.  */
> +   but set insn_location according to BEFORE.  */
>  rtx
>  emit_debug_insn_before (rtx pattern, rtx before)
>  {
> @@ -5865,7 +5865,7 @@
>    /* Update LABEL_NUSES.  */
>    mark_jump_label (PATTERN (new_rtx), new_rtx, 0);
>
> -  INSN_LOCATOR (new_rtx) = INSN_LOCATOR (insn);
> +  INSN_LOCATION (new_rtx) = INSN_LOCATION (insn);
>
>    /* If the old insn is frame related, then so is the new one.  This is
>       primarily needed for IA-64 unwind info which marks epilogue insns,
> @@ -5900,250 +5900,66 @@
>             gen_rtx_CLOBBER (VOIDmode, gen_rtx_REG (mode, regno)));
>  }
>
> -/* Data structures representing mapping of INSN_LOCATOR into scope blocks, line
> -   numbers and files.  In order to be GGC friendly we need to use separate
> -   varrays.  This also slightly improve the memory locality in binary search.
> -   The _locs array contains locators where the given property change.  The
> -   block_locators_blocks contains the scope block that is used for all insn
> -   locator greater than corresponding block_locators_locs value and smaller
> -   than the following one.  Similarly for the other properties.  */
> -static VEC(int,heap) *block_locators_locs;
> -static GTY(()) VEC(tree,gc) *block_locators_blocks;
> -static VEC(int,heap) *locations_locators_locs;
> -DEF_VEC_O(location_t);
> -DEF_VEC_ALLOC_O(location_t,heap);
> -static VEC(location_t,heap) *locations_locators_vals;
> -int prologue_locator;
> -int epilogue_locator;
> +location_t prologue_location;
> +location_t epilogue_location;
>
>  /* Hold current location information and last location information, so the
>     datastructures are built lazily only when some instructions in given
>     place are needed.  */
>  static location_t curr_location, last_location;
> -static tree curr_block, last_block;
> -static int curr_rtl_loc = -1;
>
> -/* Allocate insn locator datastructure.  */
> +/* Allocate insn location datastructure.  */
>  void
> -insn_locators_alloc (void)
> +insn_locations_init (void)
>  {
> -  prologue_locator = epilogue_locator = 0;
> -
> -  block_locators_locs = VEC_alloc (int, heap, 32);
> -  block_locators_blocks = VEC_alloc (tree, gc, 32);
> -  locations_locators_locs = VEC_alloc (int, heap, 32);
> -  locations_locators_vals = VEC_alloc (location_t, heap, 32);
> -
> +  prologue_location = epilogue_location = 0;
>    curr_location = UNKNOWN_LOCATION;
>    last_location = UNKNOWN_LOCATION;
> -  curr_block = NULL;
> -  last_block = NULL;
> -  curr_rtl_loc = 0;
>  }
>
>  /* At the end of emit stage, clear current location.  */
>  void
> -insn_locators_finalize (void)
> -{
> -  if (curr_rtl_loc >= 0)
> -    epilogue_locator = curr_insn_locator ();
> -  curr_rtl_loc = -1;
> -}
> -
> -/* Allocate insn locator datastructure.  */
> -void
> -insn_locators_free (void)
> +insn_locations_finalize (void)
>  {
> -  prologue_locator = epilogue_locator = 0;
> -
> -  VEC_free (int, heap, block_locators_locs);
> -  VEC_free (tree,gc, block_locators_blocks);
> -  VEC_free (int, heap, locations_locators_locs);
> -  VEC_free (location_t, heap, locations_locators_vals);
> +  epilogue_location = curr_location;
> +  curr_location = UNKNOWN_LOCATION;
>  }
>
>  /* Set current location.  */
>  void
> -set_curr_insn_source_location (location_t location)
> +set_curr_insn_location (location_t location)
>  {
> -  /* IV opts calls into RTL expansion to compute costs of operations.  At this
> -     time locators are not initialized.  */
> -  if (curr_rtl_loc == -1)
> -    return;
>    curr_location = location;
>  }
>
>  /* Get current location.  */
>  location_t
> -get_curr_insn_source_location (void)
> +curr_insn_location (void)
>  {
>    return curr_location;
>  }
>
> -/* Set current scope block.  */
> -void
> -set_curr_insn_block (tree b)
> -{
> -  /* IV opts calls into RTL expansion to compute costs of operations.  At this
> -     time locators are not initialized.  */
> -  if (curr_rtl_loc == -1)
> -    return;
> -  if (b)
> -    curr_block = b;
> -}
> -
> -/* Get current scope block.  */
> -tree
> -get_curr_insn_block (void)
> -{
> -  return curr_block;
> -}
> -
> -/* Return current insn locator.  */
> -int
> -curr_insn_locator (void)
> -{
> -  if (curr_rtl_loc == -1 || curr_location == UNKNOWN_LOCATION)
> -    return 0;
> -  if (last_block != curr_block)
> -    {
> -      curr_rtl_loc++;
> -      VEC_safe_push (int, heap, block_locators_locs, curr_rtl_loc);
> -      VEC_safe_push (tree, gc, block_locators_blocks, curr_block);
> -      last_block = curr_block;
> -    }
> -  if (last_location != curr_location)
> -    {
> -      curr_rtl_loc++;
> -      VEC_safe_push (int, heap, locations_locators_locs, curr_rtl_loc);
> -      VEC_safe_push (location_t, heap, locations_locators_vals,
> &curr_location);
> -      last_location = curr_location;
> -    }
> -  return curr_rtl_loc;
> -}
> -
> -
> -/* Return lexical scope block locator belongs to.  */
> -static tree
> -locator_scope (int loc)
> -{
> -  int max = VEC_length (int, block_locators_locs);
> -  int min = 0;
> -
> -  /* When block_locators_locs was initialized, the pro- and epilogue
> -     insns didn't exist yet and can therefore not be found this way.
> -     But we know that they belong to the outer most block of the
> -     current function.
> -     Without this test, the prologue would be put inside the block of
> -     the first valid instruction in the function and when that first
> -     insn is part of an inlined function then the low_pc of that
> -     inlined function is messed up.  Likewise for the epilogue and
> -     the last valid instruction.  */
> -  if (loc == prologue_locator || loc == epilogue_locator)
> -    return DECL_INITIAL (cfun->decl);
> -
> -  if (!max || !loc)
> -    return NULL;
> -  while (1)
> -    {
> -      int pos = (min + max) / 2;
> -      int tmp = VEC_index (int, block_locators_locs, pos);
> -
> -      if (tmp <= loc && min != pos)
> -       min = pos;
> -      else if (tmp > loc && max != pos)
> -       max = pos;
> -      else
> -       {
> -         min = pos;
> -         break;
> -       }
> -    }
> -  return VEC_index (tree, block_locators_blocks, min);
> -}
> -
>  /* Return lexical scope block insn belongs to.  */
>  tree
>  insn_scope (const_rtx insn)
>  {
> -  return locator_scope (INSN_LOCATOR (insn));
> -}
> -
> -/* Return line number of the statement specified by the locator.  */
> -location_t
> -locator_location (int loc)
> -{
> -  int max = VEC_length (int, locations_locators_locs);
> -  int min = 0;
> -
> -  while (1)
> -    {
> -      int pos = (min + max) / 2;
> -      int tmp = VEC_index (int, locations_locators_locs, pos);
> -
> -      if (tmp <= loc && min != pos)
> -       min = pos;
> -      else if (tmp > loc && max != pos)
> -       max = pos;
> -      else
> -       {
> -         min = pos;
> -         break;
> -       }
> -    }
> -  return *VEC_index (location_t, locations_locators_vals, min);
> -}
> -
> -/* Return source line of the statement that produced this insn.  */
> -int
> -locator_line (int loc)
> -{
> -  expanded_location xloc;
> -  if (!loc)
> -    return 0;
> -  else
> -    xloc = expand_location (locator_location (loc));
> -  return xloc.line;
> +  return LOCATION_BLOCK (INSN_LOCATION (insn));
>  }
>
>  /* Return line number of the statement that produced this insn.  */
>  int
>  insn_line (const_rtx insn)
>  {
> -  return locator_line (INSN_LOCATOR (insn));
> -}
> -
> -/* Return source file of the statement specified by LOC.  */
> -const char *
> -locator_file (int loc)
> -{
> -  expanded_location xloc;
> -  if (!loc)
> -    return 0;
> -  else
> -    xloc = expand_location (locator_location (loc));
> -  return xloc.file;
> +  return LOCATION_LINE (INSN_LOCATION (insn));
>  }
>
>  /* Return source file of the statement that produced this insn.  */
>  const char *
>  insn_file (const_rtx insn)
>  {
> -  return locator_file (INSN_LOCATOR (insn));
> +  return LOCATION_FILE (INSN_LOCATION (insn));
>  }
>
> -/* Return true if LOC1 and LOC2 locators have the same location and scope.  */
> -bool
> -locator_eq (int loc1, int loc2)
> -{
> -  if (loc1 == loc2)
> -    return true;
> -  if (locator_location (loc1) != locator_location (loc2))
> -    return false;
> -  return locator_scope (loc1) == locator_scope (loc2);
> -}
> -
> -
>  /* Return true if memory model MODEL requires a pre-operation (release-style)
>     barrier or a post-operation (acquire-style) barrier.  While not universal,
>     this function matches behavior of several targets.  */
> Index: gcc/cfgexpand.c
> ===================================================================
> --- gcc/cfgexpand.c     (revision 189835)
> +++ gcc/cfgexpand.c     (working copy)
> @@ -92,8 +92,7 @@
>            && gimple_location (stmt) != EXPR_LOCATION (t))
>           || (gimple_block (stmt)
>               && currently_expanding_to_rtl
> -             && EXPR_P (t)
> -             && gimple_block (stmt) != TREE_BLOCK (t)))
> +             && EXPR_P (t)))
>         t = copy_node (t);
>      }
>    else
> @@ -101,8 +100,6 @@
>
>    if (gimple_has_location (stmt) && CAN_HAVE_LOCATION_P (t))
>      SET_EXPR_LOCATION (t, gimple_location (stmt));
> -  if (gimple_block (stmt) && currently_expanding_to_rtl && EXPR_P (t))
> -    TREE_BLOCK (t) = gimple_block (stmt);
>
>    return t;
>  }
> @@ -1804,8 +1801,7 @@
>    last2 = last = get_last_insn ();
>
>    extract_true_false_edges_from_block (bb, &true_edge, &false_edge);
> -  set_curr_insn_source_location (gimple_location (stmt));
> -  set_curr_insn_block (gimple_block (stmt));
> +  set_curr_insn_location (gimple_location (stmt));
>
>    /* These flags have no purpose in RTL land.  */
>    true_edge->flags &= ~EDGE_TRUE_VALUE;
> @@ -1818,13 +1814,8 @@
>        jumpif_1 (code, op0, op1, label_rtx_for_bb (true_edge->dest),
>                 true_edge->probability);
>        maybe_dump_rtl_for_gimple_stmt (stmt, last);
> -      if (true_edge->goto_locus)
> -       {
> -         set_curr_insn_source_location (true_edge->goto_locus);
> -         set_curr_insn_block (true_edge->goto_block);
> -         true_edge->goto_locus = curr_insn_locator ();
> -       }
> -      true_edge->goto_block = NULL;
> +      if (!IS_UNKNOWN_LOCATION (true_edge->goto_locus))
> +       set_curr_insn_location (true_edge->goto_locus);
>        false_edge->flags |= EDGE_FALLTHRU;
>        maybe_cleanup_end_of_block (false_edge, last);
>        return NULL;
> @@ -1834,13 +1825,8 @@
>        jumpifnot_1 (code, op0, op1, label_rtx_for_bb (false_edge->dest),
>                    false_edge->probability);
>        maybe_dump_rtl_for_gimple_stmt (stmt, last);
> -      if (false_edge->goto_locus)
> -       {
> -         set_curr_insn_source_location (false_edge->goto_locus);
> -         set_curr_insn_block (false_edge->goto_block);
> -         false_edge->goto_locus = curr_insn_locator ();
> -       }
> -      false_edge->goto_block = NULL;
> +      if (!IS_UNKNOWN_LOCATION (false_edge->goto_locus))
> +       set_curr_insn_location (false_edge->goto_locus);
>        true_edge->flags |= EDGE_FALLTHRU;
>        maybe_cleanup_end_of_block (true_edge, last);
>        return NULL;
> @@ -1849,13 +1835,8 @@
>    jumpif_1 (code, op0, op1, label_rtx_for_bb (true_edge->dest),
>             true_edge->probability);
>    last = get_last_insn ();
> -  if (false_edge->goto_locus)
> -    {
> -      set_curr_insn_source_location (false_edge->goto_locus);
> -      set_curr_insn_block (false_edge->goto_block);
> -      false_edge->goto_locus = curr_insn_locator ();
> -    }
> -  false_edge->goto_block = NULL;
> +  if (!IS_UNKNOWN_LOCATION (false_edge->goto_locus))
> +    set_curr_insn_location (false_edge->goto_locus);
>    emit_jump (label_rtx_for_bb (false_edge->dest));
>
>    BB_END (bb) = last;
> @@ -1880,13 +1861,11 @@
>
>    maybe_dump_rtl_for_gimple_stmt (stmt, last2);
>
> -  if (true_edge->goto_locus)
> +  if (!IS_UNKNOWN_LOCATION (true_edge->goto_locus))
>      {
> -      set_curr_insn_source_location (true_edge->goto_locus);
> -      set_curr_insn_block (true_edge->goto_block);
> -      true_edge->goto_locus = curr_insn_locator ();
> +      set_curr_insn_location (true_edge->goto_locus);
> +      true_edge->goto_locus = curr_insn_location ();
>      }
> -  true_edge->goto_block = NULL;
>
>    return new_bb;
>  }
> @@ -1986,7 +1965,6 @@
>      CALL_FROM_THUNK_P (exp) = gimple_call_from_thunk_p (stmt);
>    CALL_EXPR_VA_ARG_PACK (exp) = gimple_call_va_arg_pack_p (stmt);
>    SET_EXPR_LOCATION (exp, gimple_location (stmt));
> -  TREE_BLOCK (exp) = gimple_block (stmt);
>
>    /* Ensure RTL is created for debug args.  */
>    if (decl && DECL_HAS_DEBUG_ARGS_P (decl))
> @@ -2021,8 +1999,7 @@
>  {
>    tree op0;
>
> -  set_curr_insn_source_location (gimple_location (stmt));
> -  set_curr_insn_block (gimple_block (stmt));
> +  set_curr_insn_location (gimple_location (stmt));
>
>    switch (gimple_code (stmt))
>      {
> @@ -3766,8 +3743,7 @@
>           tree op;
>           gimple def;
>
> -         location_t sloc = get_curr_insn_source_location ();
> -         tree sblock = get_curr_insn_block ();
> +         location_t sloc = curr_insn_location ();
>
>           /* Look for SSA names that have their last use here (TERed
>              names always have only one real use).  */
> @@ -3800,8 +3776,7 @@
>                     rtx val;
>                     enum machine_mode mode;
>
> -                   set_curr_insn_source_location (gimple_location (def));
> -                   set_curr_insn_block (gimple_block (def));
> +                   set_curr_insn_location (gimple_location (def));
>
>                     DECL_ARTIFICIAL (vexpr) = 1;
>                     TREE_TYPE (vexpr) = TREE_TYPE (value);
> @@ -3828,8 +3803,7 @@
>                       }
>                   }
>               }
> -         set_curr_insn_source_location (sloc);
> -         set_curr_insn_block (sblock);
> +         set_curr_insn_location (sloc);
>         }
>
>        currently_expanding_gimple_stmt = stmt;
> @@ -3844,8 +3818,7 @@
>         }
>        else if (gimple_debug_bind_p (stmt))
>         {
> -         location_t sloc = get_curr_insn_source_location ();
> -         tree sblock = get_curr_insn_block ();
> +         location_t sloc = curr_insn_location ();
>           gimple_stmt_iterator nsi = gsi;
>
>           for (;;)
> @@ -3867,8 +3840,7 @@
>
>               last = get_last_insn ();
>
> -             set_curr_insn_source_location (gimple_location (stmt));
> -             set_curr_insn_block (gimple_block (stmt));
> +             set_curr_insn_location (gimple_location (stmt));
>
>               if (DECL_P (var))
>                 mode = DECL_MODE (var);
> @@ -3906,13 +3878,11 @@
>                 break;
>             }
>
> -         set_curr_insn_source_location (sloc);
> -         set_curr_insn_block (sblock);
> +         set_curr_insn_location (sloc);
>         }
>        else if (gimple_debug_source_bind_p (stmt))
>         {
> -         location_t sloc = get_curr_insn_source_location ();
> -         tree sblock = get_curr_insn_block ();
> +         location_t sloc = curr_insn_location ();
>           tree var = gimple_debug_source_bind_get_var (stmt);
>           tree value = gimple_debug_source_bind_get_value (stmt);
>           rtx val;
> @@ -3920,8 +3890,7 @@
>
>           last = get_last_insn ();
>
> -         set_curr_insn_source_location (gimple_location (stmt));
> -         set_curr_insn_block (gimple_block (stmt));
> +         set_curr_insn_location (gimple_location (stmt));
>
>           mode = DECL_MODE (var);
>
> @@ -3939,8 +3908,7 @@
>               PAT_VAR_LOCATION_LOC (val) = (rtx)value;
>             }
>
> -         set_curr_insn_source_location (sloc);
> -         set_curr_insn_block (sblock);
> +         set_curr_insn_location (sloc);
>         }
>        else
>         {
> @@ -3981,13 +3949,8 @@
>    /* Expand implicit goto and convert goto_locus.  */
>    FOR_EACH_EDGE (e, ei, bb->succs)
>      {
> -      if (e->goto_locus && e->goto_block)
> -       {
> -         set_curr_insn_source_location (e->goto_locus);
> -         set_curr_insn_block (e->goto_block);
> -         e->goto_locus = curr_insn_locator ();
> -       }
> -      e->goto_block = NULL;
> +      if (!IS_UNKNOWN_LOCATION (e->goto_locus))
> +       set_curr_insn_location (e->goto_locus);
>        if ((e->flags & EDGE_FALLTHRU) && e->dest != bb->next_bb)
>         {
>           emit_jump (label_rtx_for_bb (e->dest));
> @@ -4107,12 +4070,9 @@
>
>    /* Make sure the locus is set to the end of the function, so that
>       epilogue line numbers and warnings are set properly.  */
> -  if (cfun->function_end_locus != UNKNOWN_LOCATION)
> +  if (!IS_UNKNOWN_LOCATION (cfun->function_end_locus))
>      input_location = cfun->function_end_locus;
>
> -  /* The following insns belong to the top scope.  */
> -  set_curr_insn_block (DECL_INITIAL (current_function_decl));
> -
>    /* Generate rtl for function exit.  */
>    expand_function_end ();
>
> @@ -4331,20 +4291,19 @@
>
>    rtl_profile_for_bb (ENTRY_BLOCK_PTR);
>
> -  insn_locators_alloc ();
> +  insn_locations_init ();
>    if (!DECL_IS_BUILTIN (current_function_decl))
>      {
>        /* Eventually, all FEs should explicitly set function_start_locus.  */
> -      if (cfun->function_start_locus == UNKNOWN_LOCATION)
> -       set_curr_insn_source_location
> +      if (IS_UNKNOWN_LOCATION (cfun->function_start_locus))
> +       set_curr_insn_location
>           (DECL_SOURCE_LOCATION (current_function_decl));
>        else
> -       set_curr_insn_source_location (cfun->function_start_locus);
> +       set_curr_insn_location (cfun->function_start_locus);
>      }
>    else
> -    set_curr_insn_source_location (UNKNOWN_LOCATION);
> -  set_curr_insn_block (DECL_INITIAL (current_function_decl));
> -  prologue_locator = curr_insn_locator ();
> +    set_curr_insn_location (UNKNOWN_LOCATION);
> +  prologue_location = curr_insn_location ();
>
>  #ifdef INSN_SCHEDULING
>    init_sched_attrs ();
> @@ -4514,8 +4473,7 @@
>    free_histograms ();
>
>    construct_exit_block ();
> -  set_curr_insn_block (DECL_INITIAL (current_function_decl));
> -  insn_locators_finalize ();
> +  insn_locations_finalize ();
>
>    /* Zap the tree EH table.  */
>    set_eh_throw_stmt_table (cfun, NULL);
> Index: gcc/cfgcleanup.c
> ===================================================================
> --- gcc/cfgcleanup.c    (revision 189835)
> +++ gcc/cfgcleanup.c    (working copy)
> @@ -481,13 +481,15 @@
>                   int new_locus = single_succ_edge (target)->goto_locus;
>                   int locus = goto_locus;
>
> -                 if (new_locus && locus && !locator_eq (new_locus, locus))
> +                 if (!IS_UNKNOWN_LOCATION (new_locus)
> +                     && !IS_UNKNOWN_LOCATION (locus)
> +                     && new_locus != locus)
>                     new_target = NULL;
>                   else
>                     {
>                       rtx last;
>
> -                     if (new_locus)
> +                     if (!IS_UNKNOWN_LOCATION (new_locus))
>                         locus = new_locus;
>
>                       last = BB_END (target);
> @@ -495,13 +497,15 @@
>                         last = prev_nondebug_insn (last);
>
>                       new_locus = last && INSN_P (last)
> -                                 ? INSN_LOCATOR (last) : 0;
> +                                 ? INSN_LOCATION (last) : 0;
>
> -                     if (new_locus && locus && !locator_eq (new_locus, locus))
> +                     if (!IS_UNKNOWN_LOCATION (new_locus)
> +                         && !IS_UNKNOWN_LOCATION (locus)
> +                         && new_locus != locus)
>                         new_target = NULL;
>                       else
>                         {
> -                         if (new_locus)
> +                         if (!IS_UNKNOWN_LOCATION (new_locus))
>                             locus = new_locus;
>
>                           goto_locus = locus;
> Index: gcc/tree-ssa-live.c
> ===================================================================
> --- gcc/tree-ssa-live.c (revision 189835)
> +++ gcc/tree-ssa-live.c (working copy)
> @@ -587,7 +587,7 @@
>     else
>     /* Verfify that only blocks with source location set
>        are entry points to the inlined functions.  */
> -     gcc_assert (BLOCK_SOURCE_LOCATION (scope) == UNKNOWN_LOCATION);
> +     gcc_assert (IS_UNKNOWN_LOCATION (BLOCK_SOURCE_LOCATION (scope)));
>
>     TREE_USED (scope) = !unused;
>     return unused;
> @@ -615,7 +615,7 @@
>    fprintf (file, "\n%*s{ Scope block #%i%s%s",indent, "" ,
> BLOCK_NUMBER (scope),
>            TREE_USED (scope) ? "" : " (unused)",
>            BLOCK_ABSTRACT (scope) ? " (abstract)": "");
> -  if (BLOCK_SOURCE_LOCATION (scope) != UNKNOWN_LOCATION)
> +  if (!IS_UNKNOWN_LOCATION (BLOCK_SOURCE_LOCATION (scope)))
>      {
>        expanded_location s = expand_location (BLOCK_SOURCE_LOCATION (scope));
>        fprintf (file, " %s:%i", s.file, s.line);
> @@ -765,13 +765,18 @@
>            FOR_EACH_PHI_ARG (arg_p, phi, i, SSA_OP_ALL_USES)
>              {
>               tree arg = USE_FROM_PTR (arg_p);
> +             int index = PHI_ARG_INDEX_FROM_USE (arg_p);
> +             tree block =
> +               LOCATION_BLOCK (gimple_phi_arg_location (phi, index));
> +             if (block != NULL)
> +               TREE_USED (block) = true;
>               mark_all_vars_used (&arg, global_unused_vars);
>              }
>          }
>
>        FOR_EACH_EDGE (e, ei, bb->succs)
>         if (e->goto_locus)
> -         TREE_USED (e->goto_block) = true;
> +         TREE_USED (LOCATION_BLOCK (e->goto_locus)) = true;
>      }
>
>    /* We do a two-pass approach about the out-of-scope clobbers.  We want
> Index: gcc/lto/lto.c
> ===================================================================
> --- gcc/lto/lto.c       (revision 189835)
> +++ gcc/lto/lto.c       (working copy)
> @@ -1603,7 +1603,6 @@
>    else if (EXPR_P (t))
>      {
>        int i;
> -      LTO_NO_PREVAIL (t->exp.block);
>        for (i = TREE_OPERAND_LENGTH (t) - 1; i >= 0; --i)
>         LTO_SET_PREVAIL (TREE_OPERAND (t, i));
>      }
> Index: gcc/rtl.c
> ===================================================================
> --- gcc/rtl.c   (revision 189835)
> +++ gcc/rtl.c   (working copy)
> @@ -440,7 +440,7 @@
>  #ifndef GENERATOR_FILE
>               if (((code == ASM_OPERANDS && i == 6)
>                    || (code == ASM_INPUT && i == 1))
> -                 && locator_eq (XINT (x, i), XINT (y, i)))
> +                 && XINT (x, i) == XINT (y, i))
>                 break;
>  #endif
>               return 0;
> @@ -579,7 +579,7 @@
>  #ifndef GENERATOR_FILE
>               if (((code == ASM_OPERANDS && i == 6)
>                    || (code == ASM_INPUT && i == 1))
> -                 && locator_eq (XINT (x, i), XINT (y, i)))
> +                 && XINT (x, i) == XINT (y, i))
>                 break;
>  #endif
>               return 0;
> Index: gcc/rtl.h
> ===================================================================
> --- gcc/rtl.h   (revision 189835)
> +++ gcc/rtl.h   (working copy)
> @@ -739,6 +739,7 @@
>  #endif
>
>  #define XINT(RTX, N)   (RTL_CHECK2 (RTX, N, 'i', 'n').rt_int)
> +#define XUINT(RTX, N)   (RTL_CHECK2 (RTX, N, 'i', 'n').rt_uint)
>  #define XSTR(RTX, N)   (RTL_CHECK2 (RTX, N, 's', 'S').rt_str)
>  #define XEXP(RTX, N)   (RTL_CHECK2 (RTX, N, 'e', 'u').rt_rtx)
>  #define XVEC(RTX, N)   (RTL_CHECK2 (RTX, N, 'E', 'V').rt_rtvec)
> @@ -802,13 +803,13 @@
>  /* The body of an insn.  */
>  #define PATTERN(INSN)  XEXP (INSN, 4)
>
> -#define INSN_LOCATOR(INSN) XINT (INSN, 5)
> +#define INSN_LOCATION(INSN) XUINT (INSN, 5)
> +
> +#define INSN_HAS_LOCATION(INSN) (!IS_UNKNOWN_LOCATION (INSN_LOCATION (INSN)))
> +
>  /* LOCATION of an RTX if relevant.  */
>  #define RTL_LOCATION(X) (INSN_P (X) ? \
> -                        locator_location (INSN_LOCATOR (X)) \
> -                        : UNKNOWN_LOCATION)
> -/* LOCATION of current INSN.  */
> -#define CURR_INSN_LOCATION (locator_location (curr_insn_locator ()))
> +                        INSN_LOCATION (X) : UNKNOWN_LOCATION)
>
>  /* Code number of instruction, from when it was recognized.
>     -1 means this instruction has not been recognized yet.  */
> @@ -1807,12 +1808,8 @@
>  /* In emit-rtl.c  */
>  extern int insn_line (const_rtx);
>  extern const char * insn_file (const_rtx);
> -extern location_t locator_location (int);
> -extern int locator_line (int);
> -extern const char * locator_file (int);
> -extern bool locator_eq (int, int);
> -extern int prologue_locator, epilogue_locator;
>  extern tree insn_scope (const_rtx);
> +extern location_t prologue_location, epilogue_location;
>
>  /* In jump.c */
>  extern enum rtx_code reverse_condition (enum rtx_code);
> @@ -2648,14 +2645,10 @@
>  /* Keep this for the nonce.  */
>  #define gen_lowpart rtl_hooks.gen_lowpart
>
> -extern void insn_locators_alloc (void);
> -extern void insn_locators_free (void);
> -extern void insn_locators_finalize (void);
> -extern void set_curr_insn_source_location (location_t);
> -extern location_t get_curr_insn_source_location (void);
> -extern void set_curr_insn_block (tree);
> -extern tree get_curr_insn_block (void);
> -extern int curr_insn_locator (void);
> +extern void insn_locations_init (void);
> +extern void insn_locations_finalize (void);
> +extern void set_curr_insn_location (location_t);
> +extern location_t curr_insn_location (void);
>  extern bool optimize_insn_for_size_p (void);
>  extern bool optimize_insn_for_speed_p (void);
>
> Index: gcc/tree-inline.c
> ===================================================================
> --- gcc/tree-inline.c   (revision 189835)
> +++ gcc/tree-inline.c   (working copy)
> @@ -852,10 +852,6 @@
>        /* Otherwise, just copy the node.  Note that copy_tree_r already
>          knows not to copy VAR_DECLs, etc., so this is safe.  */
>
> -      /* We should never have TREE_BLOCK set on non-statements.  */
> -      if (EXPR_P (*tp))
> -       gcc_assert (!TREE_BLOCK (*tp));
> -
>        if (TREE_CODE (*tp) == MEM_REF)
>         {
>           tree ptr = TREE_OPERAND (*tp, 0);
> @@ -901,13 +897,9 @@
>         {
>           /* Variable substitution need not be simple.  In particular,
>              the MEM_REF substitution above.  Make sure that
> -            TREE_CONSTANT and friends are up-to-date.  But make sure
> -            to not improperly set TREE_BLOCK on some sub-expressions.  */
> +            TREE_CONSTANT and friends are up-to-date.  */
>           int invariant = is_gimple_min_invariant (*tp);
> -         tree block = id->block;
> -         id->block = NULL_TREE;
>           walk_tree (&TREE_OPERAND (*tp, 0), remap_gimple_op_r, data, NULL);
> -         id->block = block;
>           recompute_tree_invariant_for_addr_expr (*tp);
>
>           /* If this used to be invariant, but is not any longer,
> @@ -919,6 +911,22 @@
>         }
>      }
>
> +  /* Update the TREE_BLOCK for the cloned expr.  */
> +  if (EXPR_P (*tp))
> +    {
> +      tree new_block = id->remapping_type_depth == 0 ? id->block : NULL;
> +      tree old_block = TREE_BLOCK (*tp);
> +      if (old_block)
> +       {
> +         tree *n;
> +         n = (tree *) pointer_map_contains (id->decl_map,
> +                                            TREE_BLOCK (*tp));
> +         if (n)
> +           new_block = *n;
> +       }
> +      TREE_SET_BLOCK (*tp, new_block);
> +    }
> +
>    /* Keep iterating.  */
>    return NULL_TREE;
>  }
> @@ -1144,11 +1152,10 @@
>               tree *n;
>               n = (tree *) pointer_map_contains (id->decl_map,
>                                                  TREE_BLOCK (*tp));
> -             gcc_assert (n || id->remapping_type_depth != 0);
>               if (n)
>                 new_block = *n;
>             }
> -         TREE_BLOCK (*tp) = new_block;
> +         TREE_SET_BLOCK (*tp, new_block);
>         }
>
>        if (TREE_CODE (*tp) != OMP_CLAUSE)
> @@ -2020,6 +2027,7 @@
>               tree new_arg;
>               tree block = id->block;
>               edge_iterator ei2;
> +             location_t locus;
>
>               /* When doing partial cloning, we allow PHIs on the entry block
>                  as long as all the arguments are the same.  Find any input
> @@ -2031,9 +2039,7 @@
>
>               arg = PHI_ARG_DEF_FROM_EDGE (phi, old_edge);
>               new_arg = arg;
> -             id->block = NULL_TREE;
>               walk_tree (&new_arg, copy_tree_body_r, id, NULL);
> -             id->block = block;
>               gcc_assert (new_arg);
>               /* With return slot optimization we can end up with
>                  non-gimple (foo *)&this->m, fix that here.  */
> @@ -2046,8 +2052,19 @@
>                   gsi_insert_seq_on_edge (new_edge, stmts);
>                   inserted = true;
>                 }
> +             locus = gimple_phi_arg_location_from_edge (phi, old_edge);
> +             block = id->block;
> +             if (LOCATION_BLOCK (locus))
> +               {
> +                 tree *n;
> +                 n = (tree *) pointer_map_contains (id->decl_map,
> +                       LOCATION_BLOCK (locus));
> +                 gcc_assert (n);
> +                 block = *n;
> +               }
> +
>               add_phi_arg (new_phi, new_arg, new_edge,
> -                          gimple_phi_arg_location_from_edge (phi, old_edge));
> +                          COMBINE_LOCATION (locus, block));
>             }
>         }
>      }
> @@ -3946,7 +3963,8 @@
>    id->block = make_node (BLOCK);
>    BLOCK_ABSTRACT_ORIGIN (id->block) = fn;
>    BLOCK_SOURCE_LOCATION (id->block) = input_location;
> -  prepend_lexical_block (gimple_block (stmt), id->block);
> +  if (gimple_block (stmt))
> +    prepend_lexical_block (gimple_block (stmt), id->block);
>
>    /* Local declarations will be replaced by their equivalents in this
>       map.  */
> Index: gcc/tree-streamer-in.c
> ===================================================================
> --- gcc/tree-streamer-in.c      (revision 189835)
> +++ gcc/tree-streamer-in.c      (working copy)
> @@ -776,7 +776,7 @@
>
>    loc = lto_input_location (ib, data_in);
>    SET_EXPR_LOCATION (expr, loc);
> -  TREE_BLOCK (expr) = stream_read_tree (ib, data_in);
> +  TREE_SET_BLOCK (expr, stream_read_tree (ib, data_in));
>  }
>
>
> Index: gcc/combine.c
> ===================================================================
> --- gcc/combine.c       (revision 189835)
> +++ gcc/combine.c       (working copy)
> @@ -2896,7 +2896,7 @@
>
>           i1 = gen_rtx_INSN (VOIDmode, INSN_UID (i2), NULL_RTX, i2,
>                              BLOCK_FOR_INSN (i2), XVECEXP (PATTERN (i2), 0, 1),
> -                            INSN_LOCATOR (i2), -1, NULL_RTX);
> +                            INSN_LOCATION (i2), -1, NULL_RTX);
>
>           SUBST (PATTERN (i2), XVECEXP (PATTERN (i2), 0, 0));
>           SUBST (XEXP (SET_SRC (PATTERN (i2)), 0),
> Index: gcc/tree-outof-ssa.c
> ===================================================================
> --- gcc/tree-outof-ssa.c        (revision 189835)
> +++ gcc/tree-outof-ssa.c        (working copy)
> @@ -108,8 +108,7 @@
>  {
>    if (e->goto_locus)
>      {
> -      set_curr_insn_source_location (e->goto_locus);
> -      set_curr_insn_block (e->goto_block);
> +      set_curr_insn_location (e->goto_locus);
>      }
>    else
>      {
> @@ -125,8 +124,7 @@
>                 continue;
>               if (gimple_has_location (stmt) || gimple_block (stmt))
>                 {
> -                 set_curr_insn_source_location (gimple_location (stmt));
> -                 set_curr_insn_block (gimple_block (stmt));
> +                 set_curr_insn_location (gimple_location (stmt));
>                   return;
>                 }
>             }
> @@ -191,7 +189,7 @@
>    set_location_for_edge (e);
>    /* If a locus is provided, override the default.  */
>    if (locus)
> -    set_curr_insn_source_location (locus);
> +    set_curr_insn_location (locus);
>
>    var = partition_to_var (SA.map, src);
>    seq = emit_partition_copy (SA.partition_to_pseudo[dest],
> @@ -228,7 +226,7 @@
>    set_location_for_edge (e);
>    /* If a locus is provided, override the default.  */
>    if (locus)
> -    set_curr_insn_source_location (locus);
> +    set_curr_insn_location (locus);
>
>    start_sequence ();
>
> @@ -284,7 +282,7 @@
>    set_location_for_edge (e);
>    /* If a locus is provided, override the default.  */
>    if (locus)
> -    set_curr_insn_source_location (locus);
> +    set_curr_insn_location (locus);
>
>    /* We give the destination as sizeexp in case src/dest are BLKmode
>       mems.  Usually we give the source.  As we result from SSA names
> @@ -320,7 +318,7 @@
>    set_location_for_edge (e);
>    /* If a locus is provided, override the default.  */
>    if (locus)
> -    set_curr_insn_source_location (locus);
> +    set_curr_insn_location (locus);
>
>    var = partition_to_var (SA.map, src);
>    seq = emit_partition_copy (dest,
> Index: gcc/basic-block.h
> ===================================================================
> --- gcc/basic-block.h   (revision 189835)
> +++ gcc/basic-block.h   (working copy)
> @@ -47,8 +47,7 @@
>    /* Auxiliary info specific to a pass.  */
>    PTR GTY ((skip (""))) aux;
>
> -  /* Location of any goto implicit in the edge and associated BLOCK.  */
> -  tree goto_block;
> +  /* Location of any goto implicit in the edge.  */
>    location_t goto_locus;
>
>    /* The index number corresponding to this edge in the edge vector
> Index: gcc/gimple.h
> ===================================================================
> --- gcc/gimple.h        (revision 189835)
> +++ gcc/gimple.h        (working copy)
> @@ -210,10 +210,6 @@
>       and the prev pointer being the last.  */
>    gimple next;
>    gimple GTY((skip)) prev;
> -
> -  /* [ WORD 6 ]
> -     Lexical block holding this statement.  */
> -  tree block;
>  };
>
>
> @@ -1198,7 +1194,7 @@
>  static inline tree
>  gimple_block (const_gimple g)
>  {
> -  return g->gsbase.block;
> +  return LOCATION_BLOCK (g->gsbase.location);
>  }
>
>
> @@ -1207,7 +1203,7 @@
>  static inline void
>  gimple_set_block (gimple g, tree block)
>  {
> -  g->gsbase.block = block;
> +  g->gsbase.location = COMBINE_LOCATION (g->gsbase.location, block);
>  }
>
>
> @@ -1242,7 +1238,7 @@
>  static inline bool
>  gimple_has_location (const_gimple g)
>  {
> -  return gimple_location (g) != UNKNOWN_LOCATION;
> +  return !IS_UNKNOWN_LOCATION (gimple_location (g));
>  }
>
>
> Index: gcc/tree-cfg.c
> ===================================================================
> --- gcc/tree-cfg.c      (revision 189835)
> +++ gcc/tree-cfg.c      (working copy)
> @@ -808,15 +808,11 @@
>    e = make_edge (bb, then_bb, EDGE_TRUE_VALUE);
>    assign_discriminator (entry_locus, then_bb);
>    e->goto_locus = gimple_location (then_stmt);
> -  if (e->goto_locus)
> -    e->goto_block = gimple_block (then_stmt);
>    e = make_edge (bb, else_bb, EDGE_FALSE_VALUE);
>    if (e)
>      {
>        assign_discriminator (entry_locus, else_bb);
>        e->goto_locus = gimple_location (else_stmt);
> -      if (e->goto_locus)
> -       e->goto_block = gimple_block (else_stmt);
>      }
>
>    /* We do not need the labels anymore.  */
> @@ -1026,8 +1022,6 @@
>        edge e = make_edge (bb, label_bb, EDGE_FALLTHRU);
>        e->goto_locus = gimple_location (goto_t);
>        assign_discriminator (e->goto_locus, label_bb);
> -      if (e->goto_locus)
> -       e->goto_block = gimple_block (goto_t);
>        gsi_remove (&last, true);
>        return;
>      }
> @@ -1501,7 +1495,7 @@
>
>    /* When not optimizing, don't merge if we'd lose goto_locus.  */
>    if (!optimize
> -      && single_succ_edge (a)->goto_locus != UNKNOWN_LOCATION)
> +      && single_succ_edge (a)->goto_locus)
>      {
>        location_t goto_locus = single_succ_edge (a)->goto_locus;
>        gimple_stmt_iterator prev, next;
> @@ -5987,9 +5981,7 @@
>    tree t = *tp;
>
>    if (EXPR_P (t))
> -    /* We should never have TREE_BLOCK set on non-statements.  */
> -    gcc_assert (!TREE_BLOCK (t));
> -
> +    ;
>    else if (DECL_P (t) || TREE_CODE (t) == SSA_NAME)
>      {
>        if (TREE_CODE (t) == SSA_NAME)
> @@ -6294,12 +6286,12 @@
>      }
>
>    FOR_EACH_EDGE (e, ei, bb->succs)
> -    if (e->goto_locus)
> +    if (!IS_UNKNOWN_LOCATION (e->goto_locus))
>        {
> -       tree block = e->goto_block;
> +       tree block = LOCATION_BLOCK (e->goto_locus);
>         if (d->orig_block == NULL_TREE
>             || block == d->orig_block)
> -         e->goto_block = d->new_block;
> +         e->goto_locus = COMBINE_LOCATION (e->goto_locus, d->new_block);
>  #ifdef ENABLE_CHECKING
>         else if (block != d->new_block)
>           {
> Index: gcc/config/alpha/alpha.c
> ===================================================================
> --- gcc/config/alpha/alpha.c    (revision 189835)
> +++ gcc/config/alpha/alpha.c    (working copy)
> @@ -8352,7 +8352,6 @@
>       instruction scheduling worth while.  Note that use_thunk calls
>       assemble_start_function and assemble_end_function.  */
>    insn = get_insns ();
> -  insn_locators_alloc ();
>    shorten_branches (insn);
>    final_start_function (insn, file, 1);
>    final (insn, file, 1);
> Index: gcc/config/sparc/sparc.c
> ===================================================================
> --- gcc/config/sparc/sparc.c    (revision 189835)
> +++ gcc/config/sparc/sparc.c    (working copy)
> @@ -10654,7 +10654,6 @@
>       instruction scheduling worth while.  Note that use_thunk calls
>       assemble_start_function and assemble_end_function.  */
>    insn = get_insns ();
> -  insn_locators_alloc ();
>    shorten_branches (insn);
>    final_start_function (insn, file, 1);
>    final (insn, file, 1);
> Index: gcc/config/i386/i386.c
> ===================================================================
> --- gcc/config/i386/i386.c      (revision 189835)
> +++ gcc/config/i386/i386.c      (working copy)
> @@ -33063,7 +33063,6 @@
>    /* Emit just enough of rest_of_compilation to get the insns emitted.
>       Note that use_thunk calls assemble_start_function et al.  */
>    tmp = get_insns ();
> -  insn_locators_alloc ();
>    shorten_branches (tmp);
>    final_start_function (tmp, file, 1);
>    final (tmp, file, 1);
> Index: gcc/config/tilegx/tilegx.c
> ===================================================================
> --- gcc/config/tilegx/tilegx.c  (revision 189835)
> +++ gcc/config/tilegx/tilegx.c  (working copy)
> @@ -4804,7 +4804,6 @@
>       serial except for the tail call, so we're only wasting one cycle.
>     */
>    insn = get_insns ();
> -  insn_locators_alloc ();
>    shorten_branches (insn);
>    final_start_function (insn, file, 1);
>    final (insn, file, 1);
> Index: gcc/config/sh/sh.c
> ===================================================================
> --- gcc/config/sh/sh.c  (revision 189835)
> +++ gcc/config/sh/sh.c  (working copy)
> @@ -11979,7 +11979,6 @@
>       the insns emitted.  Note that use_thunk calls
>       assemble_start_function and assemble_end_function.  */
>
> -  insn_locators_alloc ();
>    insns = get_insns ();
>
>    if (optimize > 0)
> Index: gcc/config/ia64/ia64.c
> ===================================================================
> --- gcc/config/ia64/ia64.c      (revision 189835)
> +++ gcc/config/ia64/ia64.c      (working copy)
> @@ -10848,7 +10848,6 @@
>       instruction scheduling worth while.  Note that use_thunk calls
>       assemble_start_function and assemble_end_function.  */
>
> -  insn_locators_alloc ();
>    emit_all_insn_group_barriers (NULL);
>    insn = get_insns ();
>    shorten_branches (insn);
> Index: gcc/config/rs6000/rs6000.c
> ===================================================================
> --- gcc/config/rs6000/rs6000.c  (revision 189835)
> +++ gcc/config/rs6000/rs6000.c  (working copy)
> @@ -21664,7 +21664,6 @@
>       instruction scheduling worth while.  Note that use_thunk calls
>       assemble_start_function and assemble_end_function.  */
>    insn = get_insns ();
> -  insn_locators_alloc ();
>    shorten_branches (insn);
>    final_start_function (insn, file, 1);
>    final (insn, file, 1);
> Index: gcc/config/score/score.c
> ===================================================================
> --- gcc/config/score/score.c    (revision 189835)
> +++ gcc/config/score/score.c    (working copy)
> @@ -505,7 +505,6 @@
>    /* Run just enough of rest_of_compilation.  This sequence was
>       "borrowed" from alpha.c.  */
>    insn = get_insns ();
> -  insn_locators_alloc ();
>    split_all_insns_noflow ();
>    shorten_branches (insn);
>    final_start_function (insn, file, 1);
> Index: gcc/config/tilepro/tilepro.c
> ===================================================================
> --- gcc/config/tilepro/tilepro.c        (revision 189835)
> +++ gcc/config/tilepro/tilepro.c        (working copy)
> @@ -4407,7 +4407,6 @@
>       serial except for the tail call, so we're only wasting one cycle.
>     */
>    insn = get_insns ();
> -  insn_locators_alloc ();
>    shorten_branches (insn);
>    final_start_function (insn, file, 1);
>    final (insn, file, 1);
> Index: gcc/config/mips/mips.c
> ===================================================================
> --- gcc/config/mips/mips.c      (revision 189835)
> +++ gcc/config/mips/mips.c      (working copy)
> @@ -15637,7 +15637,6 @@
>    /* Run just enough of rest_of_compilation.  This sequence was
>       "borrowed" from alpha.c.  */
>    insn = get_insns ();
> -  insn_locators_alloc ();
>    split_all_insns_noflow ();
>    mips16_lay_out_constants ();
>    shorten_branches (insn);
> Index: gcc/cfgrtl.c
> ===================================================================
> --- gcc/cfgrtl.c        (revision 189835)
> +++ gcc/cfgrtl.c        (working copy)
> @@ -720,19 +720,19 @@
>  static bool
>  unique_locus_on_edge_between_p (basic_block a, basic_block b)
>  {
> -  const int goto_locus = EDGE_SUCC (a, 0)->goto_locus;
> +  const location_t goto_locus = EDGE_SUCC (a, 0)->goto_locus;
>    rtx insn, end;
>
> -  if (!goto_locus)
> +  if (IS_UNKNOWN_LOCATION (goto_locus))
>      return false;
>
>    /* First scan block A backward.  */
>    insn = BB_END (a);
>    end = PREV_INSN (BB_HEAD (a));
> -  while (insn != end && (!NONDEBUG_INSN_P (insn) || INSN_LOCATOR (insn) == 0))
> +  while (insn != end && (!NONDEBUG_INSN_P (insn) || !INSN_HAS_LOCATION (insn)))
>      insn = PREV_INSN (insn);
>
> -  if (insn != end && locator_eq (INSN_LOCATOR (insn), goto_locus))
> +  if (insn != end && INSN_LOCATION (insn) == goto_locus)
>      return false;
>
>    /* Then scan block B forward.  */
> @@ -743,8 +743,8 @@
>        while (insn != end && !NONDEBUG_INSN_P (insn))
>         insn = NEXT_INSN (insn);
>
> -      if (insn != end && INSN_LOCATOR (insn) != 0
> -         && locator_eq (INSN_LOCATOR (insn), goto_locus))
> +      if (insn != end && INSN_HAS_LOCATION (insn)
> +         && INSN_LOCATION (insn) == goto_locus)
>         return false;
>      }
>
> @@ -761,7 +761,7 @@
>      return;
>
>    BB_END (a) = emit_insn_after_noloc (gen_nop (), BB_END (a), a);
> -  INSN_LOCATOR (BB_END (a)) = EDGE_SUCC (a, 0)->goto_locus;
> +  INSN_LOCATION (BB_END (a)) = EDGE_SUCC (a, 0)->goto_locus;
>  }
>
>  /* Blocks A and B are to be merged into a single block A.  The insns
> @@ -1478,7 +1478,7 @@
>    else
>      jump_block = e->src;
>
> -  if (e->goto_locus && e->goto_block == NULL)
> +  if (!IS_UNKNOWN_LOCATION (e->goto_locus))
>      loc = e->goto_locus;
>    else
>      loc = 0;
> @@ -3337,7 +3337,8 @@
>          edge_iterator ei;
>
>          FOR_EACH_EDGE (e, ei, bb->succs)
> -         if (e->goto_locus && !(e->flags & EDGE_ABNORMAL))
> +         if (!IS_UNKNOWN_LOCATION (e->goto_locus)
> +             && !(e->flags & EDGE_ABNORMAL))
>             {
>               edge e2;
>               edge_iterator ei2;
> @@ -3347,15 +3348,15 @@
>               insn = BB_END (e->src);
>               end = PREV_INSN (BB_HEAD (e->src));
>               while (insn != end
> -                    && (!NONDEBUG_INSN_P (insn) || INSN_LOCATOR (insn) == 0))
> +                    && (!NONDEBUG_INSN_P (insn) || !INSN_HAS_LOCATION (insn)))
>                 insn = PREV_INSN (insn);
>               if (insn != end
> -                 && locator_eq (INSN_LOCATOR (insn), (int) e->goto_locus))
> +                 && INSN_LOCATION (insn) == e->goto_locus)
>                 continue;
>               if (simplejump_p (BB_END (e->src))
> -                 && INSN_LOCATOR (BB_END (e->src)) == 0)
> +                 && !INSN_HAS_LOCATION (BB_END (e->src)))
>                 {
> -                 INSN_LOCATOR (BB_END (e->src)) = e->goto_locus;
> +                 INSN_LOCATION (BB_END (e->src)) = e->goto_locus;
>                   continue;
>                 }
>               dest = e->dest;
> @@ -3371,24 +3372,24 @@
>                   end = NEXT_INSN (BB_END (dest));
>                   while (insn != end && !NONDEBUG_INSN_P (insn))
>                     insn = NEXT_INSN (insn);
> -                 if (insn != end && INSN_LOCATOR (insn)
> -                     && locator_eq (INSN_LOCATOR (insn), (int) e->goto_locus))
> +                 if (insn != end && INSN_HAS_LOCATION (insn)
> +                     && INSN_LOCATION (insn) == e->goto_locus)
>                     continue;
>                 }
>               nb = split_edge (e);
>               if (!INSN_P (BB_END (nb)))
>                 BB_END (nb) = emit_insn_after_noloc (gen_nop (), BB_END (nb),
>                                                      nb);
> -             INSN_LOCATOR (BB_END (nb)) = e->goto_locus;
> +             INSN_LOCATION (BB_END (nb)) = e->goto_locus;
>
>               /* If there are other incoming edges to the destination block
>                  with the same goto locus, redirect them to the new block as
>                  well, this can prevent other such blocks from being created
>                  in subsequent iterations of the loop.  */
>               for (ei2 = ei_start (dest->preds); (e2 = ei_safe_edge (ei2)); )
> -               if (e2->goto_locus
> +               if (!IS_UNKNOWN_LOCATION (e2->goto_locus)
>                     && !(e2->flags & (EDGE_ABNORMAL | EDGE_FALLTHRU))
> -                   && locator_eq (e->goto_locus, e2->goto_locus))
> +                   && e->goto_locus == e2->goto_locus)
>                   redirect_edge_and_branch (e2, nb);
>                 else
>                   ei_next (&ei2);
> @@ -4088,7 +4089,7 @@
>      }
>
>    /* If B was a forwarder block, propagate the locus on the edge.  */
> -  if (forwarder_p && !EDGE_SUCC (b, 0)->goto_locus)
> +  if (forwarder_p && IS_UNKNOWN_LOCATION (EDGE_SUCC (b, 0)->goto_locus))
>      EDGE_SUCC (b, 0)->goto_locus = EDGE_SUCC (a, 0)->goto_locus;
>
>    if (dump_file)
> Index: gcc/stmt.c
> ===================================================================
> --- gcc/stmt.c  (revision 189835)
> +++ gcc/stmt.c  (working copy)
> @@ -2397,7 +2397,7 @@
>                  then emit the code for one side at a time.  */
>
>               tree test_label
> -               = build_decl (CURR_INSN_LOCATION,
> +               = build_decl (curr_insn_location (),
>                               LABEL_DECL, NULL_TREE, NULL_TREE);
>
>               /* See if the value is on the right.  */
> @@ -2521,7 +2521,7 @@
>               /* Right hand node requires testing.
>                  Branch to a label where we will handle it later.  */
>
> -             test_label = build_decl (CURR_INSN_LOCATION,
> +             test_label = build_decl (curr_insn_location (),
>                                        LABEL_DECL, NULL_TREE, NULL_TREE);
>               emit_cmp_and_jump_insns (index,
>                                        convert_modes
> Index: libcpp/include/line-map.h
> ===================================================================
> --- libcpp/include/line-map.h   (revision 189835)
> +++ libcpp/include/line-map.h   (working copy)
> @@ -89,7 +89,7 @@
>
>  /* This is the highest possible source location encoded within an
>     ordinary or macro map.  */
> -#define MAX_SOURCE_LOCATION 0xFFFFFFFF
> +#define MAX_SOURCE_LOCATION 0x7FFFFFFF
>
>  struct cpp_hashnode;
>
> @@ -408,6 +408,16 @@
>  #define LINEMAPS_LAST_ALLOCATED_MACRO_MAP(SET) \
>    LINEMAPS_LAST_ALLOCATED_MAP (SET, true)
>
> +extern void location_block_init (void);
> +extern void location_block_fini (void);
> +extern source_location get_combine_location (source_location, void *);
> +extern void *get_block_from_location (source_location);
> +extern source_location get_locus_from_location (source_location);
> +
> +#define COMBINE_LOCATION(LOC, BLOCK) \
> +  ((BLOCK) ? get_combine_location ((LOC), (BLOCK)) : (LOC))
> +#define IS_COMBINED_LOCATION(LOC) (((LOC) & MAX_SOURCE_LOCATION) != (LOC))
> +
>  /* Initialize a line map set.  */
>  extern void linemap_init (struct line_maps *);
>
> @@ -594,6 +604,8 @@
>
>    int column;
>
> +  void *block;
> +
>    /* In a system header?. */
>    bool sysp;
>  } expanded_location;
> Index: libcpp/line-map.c
> ===================================================================
> --- libcpp/line-map.c   (revision 189835)
> +++ libcpp/line-map.c   (working copy)
> @@ -25,6 +25,7 @@
>  #include "line-map.h"
>  #include "cpplib.h"
>  #include "internal.h"
> +#include "hashtab.h"
>
>  static void trace_include (const struct line_maps *, const struct line_map *);
>  static const struct line_map * linemap_ordinary_map_lookup (struct line_maps *,
> @@ -50,6 +51,121 @@
>  extern unsigned num_expanded_macros_counter;
>  extern unsigned num_macro_tokens_counter;
>
> +struct location_block {
> +  source_location locus;
> +  void *block;
> +};
> +
> +static htab_t location_block_htab;
> +static source_location curr_combined_location;
> +static struct location_block *location_blocks;
> +static unsigned int allocated_location_blocks;
> +
> +/* Hash function for location_block hashtable.  */
> +
> +static hashval_t
> +location_block_hash (const void *l)
> +{
> +  const struct location_block *lb = (const struct location_block *) l;
> +  return (hashval_t) lb->locus + (size_t) &lb->block;
> +}
> +
> +/* Compare function for location_block hashtable.  */
> +
> +static int
> +location_block_eq (const void *l1, const void *l2)
> +{
> +  const struct location_block *lb1 = (const struct location_block *) l1;
> +  const struct location_block *lb2 = (const struct location_block *) l2;
> +  return lb1->locus == lb2->locus && lb1->block == lb2->block;
> +}
> +
> +/* Update the hashtable when location_blocks is reallocated.  */
> +
> +static int
> +location_block_update (void **slot, void *data)
> +{
> +  *((char **) slot) += ((char *) location_blocks - (char *) data);
> +  return 1;
> +}
> +
> +/* Combine LOCUS and BLOCK to a combined location.  */
> +
> +source_location
> +get_combine_location (source_location locus, void *block)
> +{
> +  struct location_block lb;
> +  struct location_block **slot;
> +
> +  linemap_assert (block);
> +
> +  if (IS_COMBINED_LOCATION (locus))
> +    locus = location_blocks[locus & MAX_SOURCE_LOCATION].locus;
> +  if (locus == 0 && block == NULL)
> +    return 0;
> +  lb.locus = locus;
> +  lb.block = block;
> +  slot = (struct location_block **)
> +      htab_find_slot (location_block_htab, &lb, INSERT);
> +  if (*slot == NULL)
> +    {
> +      *slot = location_blocks + curr_combined_location;
> +      location_blocks[curr_combined_location] = lb;
> +      if (++curr_combined_location >= allocated_location_blocks)
> +       {
> +         char *orig_location_blocks = (char *) location_blocks;
> +         allocated_location_blocks *= 2;
> +         location_blocks = XRESIZEVEC (struct location_block,
> +                                       location_blocks,
> +                                       allocated_location_blocks);
> +         htab_traverse (location_block_htab, location_block_update,
> +                        orig_location_blocks);
> +       }
> +    }
> +  return ((*slot) - location_blocks) | 0x80000000;
> +}
> +
> +/* Return the block for LOCATION.  */
> +
> +void *
> +get_block_from_location (source_location location)
> +{
> +  linemap_assert (IS_COMBINED_LOCATION (location));
> +  return location_blocks[location & MAX_SOURCE_LOCATION].block;
> +}
> +
> +/* Return the locus for LOCATION.  */
> +
> +source_location
> +get_locus_from_location (source_location location)
> +{
> +  linemap_assert (IS_COMBINED_LOCATION (location));
> +  return location_blocks[location & MAX_SOURCE_LOCATION].locus;
> +}
> +
> +/* Initialize the location_block structure.  */
> +
> +void
> +location_block_init (void)
> +{
> +  location_block_htab = htab_create (100, location_block_hash,
> +                                    location_block_eq, NULL);
> +  curr_combined_location = 0;
> +  allocated_location_blocks = 100;
> +  location_blocks = XNEWVEC (struct location_block,
> +                            allocated_location_blocks);
> +}
> +
> +/* Finalize the location_block structure.  */
> +
> +void
> +location_block_fini (void)
> +{
> +  allocated_location_blocks = 0;
> +  XDELETEVEC (location_blocks);
> +  htab_delete (location_block_htab);
> +}
> +
>  /* Initialize a line map set.  */
>
>  void
> @@ -509,6 +625,8 @@
>  const struct line_map*
>  linemap_lookup (struct line_maps *set, source_location line)
>  {
> +  if (IS_COMBINED_LOCATION (line))
> +    line = location_blocks[line & MAX_SOURCE_LOCATION].locus;
>    if (linemap_location_from_macro_expansion_p (set, line))
>      return linemap_macro_map_lookup (set, line);
>    return linemap_ordinary_map_lookup (set, line);
> @@ -525,6 +643,9 @@
>    unsigned int md, mn, mx;
>    const struct line_map *cached, *result;
>
> +  if (IS_COMBINED_LOCATION (line))
> +    line = location_blocks[line & MAX_SOURCE_LOCATION].locus;
> +
>    if (set ==  NULL || line < RESERVED_LOCATION_COUNT)
>      return NULL;
>
> @@ -570,6 +691,9 @@
>    unsigned int md, mn, mx;
>    const struct line_map *cached, *result;
>
> +  if (IS_COMBINED_LOCATION (line))
> +    line = location_blocks[line & MAX_SOURCE_LOCATION].locus;
> +
>    linemap_assert (line >= LINEMAPS_MACRO_LOWEST_LOCATION (set));
>
>    if (set ==  NULL)
> @@ -648,6 +772,9 @@
>  {
>    unsigned token_no;
>
> +  if (IS_COMBINED_LOCATION (location))
> +    location = location_blocks[location & MAX_SOURCE_LOCATION].locus;
> +
>    linemap_assert (linemap_macro_expansion_map_p (map)
>                   && location >= MAP_START_LOCATION (map));
>    linemap_assert (location >= RESERVED_LOCATION_COUNT);
> @@ -672,6 +799,9 @@
>  {
>    unsigned token_no;
>
> +  if (IS_COMBINED_LOCATION (location))
> +    location = location_blocks[location & MAX_SOURCE_LOCATION].locus;
> +
>    linemap_assert (linemap_macro_expansion_map_p (map)
>                   && location >= MAP_START_LOCATION (map));
>    linemap_assert (location >= RESERVED_LOCATION_COUNT);
> @@ -696,6 +826,9 @@
>  {
>    const struct line_map *map = NULL;
>
> +  if (IS_COMBINED_LOCATION (location))
> +    location = location_blocks[location & MAX_SOURCE_LOCATION].locus;
> +
>    if (location < RESERVED_LOCATION_COUNT)
>      return 0;
>
> @@ -720,6 +853,9 @@
>  {
>    const struct line_map *map = NULL;
>
> +  if (IS_COMBINED_LOCATION (location))
> +    location = location_blocks[location & MAX_SOURCE_LOCATION].locus;
> +
>    if (location < RESERVED_LOCATION_COUNT)
>      return NULL;
>
> @@ -754,6 +890,9 @@
>  {
>    const struct line_map *map = NULL;
>
> +  if (IS_COMBINED_LOCATION (location))
> +    location = location_blocks[location & MAX_SOURCE_LOCATION].locus;
> +
>    if (location < RESERVED_LOCATION_COUNT)
>      return false;
>
> @@ -793,6 +932,9 @@
>  linemap_location_from_macro_expansion_p (struct line_maps *set,
>                                          source_location location)
>  {
> +  if (IS_COMBINED_LOCATION (location))
> +    location = location_blocks[location & MAX_SOURCE_LOCATION].locus;
> +
>    linemap_assert (location <= MAX_SOURCE_LOCATION
>                   && (set->highest_location
>                       < LINEMAPS_MACRO_LOWEST_LOCATION (set)));
> @@ -933,6 +1075,9 @@
>  {
>    struct line_map *map;
>
> +  if (IS_COMBINED_LOCATION (location))
> +    location = location_blocks[location & MAX_SOURCE_LOCATION].locus;
> +
>    linemap_assert (set && location >= RESERVED_LOCATION_COUNT);
>
>    while (true)
> @@ -967,6 +1112,9 @@
>  {
>    struct line_map *map;
>
> +  if (IS_COMBINED_LOCATION (location))
> +    location = location_blocks[location & MAX_SOURCE_LOCATION].locus;
> +
>    linemap_assert (set && location >= RESERVED_LOCATION_COUNT);
>
>    while (true)
> @@ -1005,6 +1153,9 @@
>  {
>    struct line_map *map;
>
> +  if (IS_COMBINED_LOCATION (location))
> +    location = location_blocks[location & MAX_SOURCE_LOCATION].locus;
> +
>    linemap_assert (set && location >= RESERVED_LOCATION_COUNT);
>
>    while (true)
> @@ -1074,6 +1225,9 @@
>                           enum location_resolution_kind lrk,
>                           const struct line_map **map)
>  {
> +  if (IS_COMBINED_LOCATION (loc))
> +    loc = location_blocks[loc & MAX_SOURCE_LOCATION].locus;
> +
>    if (loc < RESERVED_LOCATION_COUNT)
>      {
>        /* A reserved location wasn't encoded in a map.  Let's return a
> @@ -1121,6 +1275,9 @@
>    source_location resolved_location;
>    const struct line_map *resolved_map;
>
> +  if (IS_COMBINED_LOCATION (loc))
> +    loc = location_blocks[loc & MAX_SOURCE_LOCATION].locus;
> +
>    resolved_location =
>      linemap_macro_map_loc_unwind_toward_spelling (*map, loc);
>    resolved_map = linemap_lookup (set, resolved_location);
> @@ -1157,6 +1314,9 @@
>    source_location resolved_loc;
>    const struct line_map *map0 = NULL, *map1 = NULL;
>
> +  if (IS_COMBINED_LOCATION (loc))
> +    loc = location_blocks[loc & MAX_SOURCE_LOCATION].locus;
> +
>    map0 = linemap_lookup (set, loc);
>    if (!linemap_macro_expansion_map_p (map0))
>      return loc;
> @@ -1198,6 +1358,11 @@
>    expanded_location xloc;
>
>    memset (&xloc, 0, sizeof (xloc));
> +  if (IS_COMBINED_LOCATION (loc))
> +    {
> +      loc = location_blocks[loc & MAX_SOURCE_LOCATION].locus;
> +      xloc.block = location_blocks[loc & MAX_SOURCE_LOCATION].block;
> +    }
>
>    if (loc < RESERVED_LOCATION_COUNT)
>      /* The location for this token wasn't generated from a line map.
> @@ -1290,6 +1455,9 @@
>    const char *path = "", *from = "";
>    int l = -1, c = -1, s = -1, e = -1;
>
> +  if (IS_COMBINED_LOCATION (loc))
> +    loc = location_blocks[loc & MAX_SOURCE_LOCATION].locus;
> +
>    if (loc == 0)
>      return;

Patch

Index: gcc/tree.c
===================================================================
--- gcc/tree.c	(revision 189835)
+++ gcc/tree.c	(working copy)
@@ -3765,7 +3765,6 @@ 
   TREE_TYPE (t) = type;
   SET_EXPR_LOCATION (t, UNKNOWN_LOCATION);
   TREE_OPERAND (t, 0) = node;
-  TREE_BLOCK (t) = NULL_TREE;
   if (node && !TYPE_P (node))
     {
       TREE_SIDE_EFFECTS (t) = TREE_SIDE_EFFECTS (node);
@@ -10867,17 +10866,28 @@ 
 }


-tree *
+tree
 tree_block (tree t)
 {
   char const c = TREE_CODE_CLASS (TREE_CODE (t));

   if (IS_EXPR_CODE_CLASS (c))
-    return &t->exp.block;
+    return LOCATION_BLOCK (t->exp.locus);
   gcc_unreachable ();
   return NULL;
 }

+void
+tree_set_block (tree t, tree b)
+{
+  char const c = TREE_CODE_CLASS (TREE_CODE (t));
+
+  if (IS_EXPR_CODE_CLASS (c))
+    t->exp.locus = COMBINE_LOCATION (t->exp.locus, b);
+  else
+    gcc_unreachable ();
+}
+
 /* Create a nameless artificial label and put it in the current
    function context.  The label has a location of LOC.  Returns the
    newly created label.  */
Index: gcc/tree.h
===================================================================
--- gcc/tree.h	(revision 189835)
+++ gcc/tree.h	(working copy)
@@ -999,7 +999,8 @@ 

 #endif

-#define TREE_BLOCK(NODE)		*(tree_block (NODE))
+#define TREE_BLOCK(NODE)		(tree_block (NODE))
+#define TREE_SET_BLOCK(T, B)		(tree_set_block ((T), (B)))

 #include "tree-check.h"

@@ -1702,7 +1703,7 @@ 
 #define EXPR_LOCATION(NODE) \
   (CAN_HAVE_LOCATION_P ((NODE)) ? (NODE)->exp.locus : UNKNOWN_LOCATION)
 #define SET_EXPR_LOCATION(NODE, LOCUS) EXPR_CHECK ((NODE))->exp.locus = (LOCUS)
-#define EXPR_HAS_LOCATION(NODE) (EXPR_LOCATION (NODE) != UNKNOWN_LOCATION)
+#define EXPR_HAS_LOCATION(NODE) (!IS_UNKNOWN_LOCATION (EXPR_LOCATION (NODE)))
 /* The location to be used in a diagnostic about this expression.  Do not
    use this macro if the location will be assigned to other expressions.  */
 #define EXPR_LOC_OR_HERE(NODE) (EXPR_HAS_LOCATION (NODE) ?
(NODE)->exp.locus : input_location)
@@ -1881,7 +1882,7 @@ 
 					      OMP_CLAUSE_PRIVATE,	\
 	                                      OMP_CLAUSE_COPYPRIVATE), 0)
 #define OMP_CLAUSE_HAS_LOCATION(NODE) \
-  ((OMP_CLAUSE_CHECK (NODE))->omp_clause.locus != UNKNOWN_LOCATION)
+  (!IS_UNKNOWN_LOCATION ((OMP_CLAUSE_CHECK (NODE))->omp_clause.locus))
 #define OMP_CLAUSE_LOCATION(NODE)  (OMP_CLAUSE_CHECK (NODE))->omp_clause.locus

 /* True on an OMP_SECTION statement that was the last lexical member.
@@ -1972,7 +1973,6 @@ 
 struct GTY(()) tree_exp {
   struct tree_typed typed;
   location_t locus;
-  tree block;
   tree GTY ((special ("tree_exp"),
 	     desc ("TREE_CODE ((tree) &%0)")))
     operands[1];
@@ -5164,7 +5164,7 @@ 
 static inline bool
 inlined_function_outer_scope_p (const_tree block)
 {
- return BLOCK_SOURCE_LOCATION (block) != UNKNOWN_LOCATION;
+ return !IS_UNKNOWN_LOCATION (BLOCK_SOURCE_LOCATION (block));
 }

 /* Loop over all function arguments of FNTYPE.  In each iteration, PTR is set
@@ -5539,7 +5539,8 @@ 
 extern HOST_WIDE_INT int_cst_value (const_tree);
 extern HOST_WIDEST_INT widest_int_cst_value (const_tree);

-extern tree *tree_block (tree);
+extern tree tree_block (tree);
+extern void tree_set_block (tree, tree);
 extern location_t *block_nonartificial_location (tree);
 extern location_t tree_nonartificial_location (tree);

Index: gcc/final.c
===================================================================
--- gcc/final.c	(revision 189835)
+++ gcc/final.c	(working copy)
@@ -1605,7 +1605,7 @@ 
 					     insn_scope (XVECEXP (body, 0, i)));
 	}
       if (! this_block)
-	continue;
+	this_block = DECL_INITIAL (cfun->decl);

       if (this_block != cur_block)
 	{
@@ -1640,8 +1640,8 @@ 

   this_is_asm_operands = 0;

-  last_filename = locator_file (prologue_locator);
-  last_linenum = locator_line (prologue_locator);
+  last_filename = LOCATION_FILE (prologue_location);
+  last_linenum = LOCATION_LINE (prologue_location);
   last_discriminator = discriminator = 0;

   high_block_linenum = high_function_linenum = last_linenum;
Index: gcc/input.c
===================================================================
--- gcc/input.c	(revision 189835)
+++ gcc/input.c	(working copy)
@@ -51,6 +51,13 @@ 
   expanded_location xloc;
   const struct line_map *map;
   enum location_resolution_kind lrk = LRK_MACRO_EXPANSION_POINT;
+  tree block = NULL;
+
+  if (IS_COMBINED_LOCATION (loc))
+    {
+      block = LOCATION_BLOCK (loc);
+      loc = LOCATION_LOCUS (loc);
+    }

   memset (&xloc, 0, sizeof (xloc));

@@ -74,6 +81,7 @@ 
       xloc = linemap_expand_location (line_table, map, loc);
     }

+  xloc.block = block;
   if (loc <= BUILTINS_LOCATION)
     xloc.file = loc == UNKNOWN_LOCATION ? NULL : _("<built-in>");

Index: gcc/input.h
===================================================================
--- gcc/input.h	(revision 189835)
+++ gcc/input.h	(working copy)
@@ -51,6 +51,14 @@ 
 #define LOCATION_FILE(LOC) ((expand_location (LOC)).file)
 #define LOCATION_LINE(LOC) ((expand_location (LOC)).line)
 #define LOCATION_COLUMN(LOC)((expand_location (LOC)).column)
+#define LOCATION_LOCUS(LOC) \
+  ((IS_COMBINED_LOCATION(LOC)) ? get_locus_from_location (LOC) : (LOC))
+#define LOCATION_BLOCK(LOC) \
+  ((tree) ((IS_COMBINED_LOCATION (LOC)) ? get_block_from_location (LOC) \
+  : NULL))
+#define IS_UNKNOWN_LOCATION(LOC) \
+  ((IS_COMBINED_LOCATION (LOC)) ? get_locus_from_location (LOC) == 0 \
+  : (LOC) == 0)

 #define input_line LOCATION_LINE (input_location)
 #define input_filename LOCATION_FILE (input_location)
Index: gcc/fold-const.c
===================================================================
--- gcc/fold-const.c	(revision 189835)
+++ gcc/fold-const.c	(working copy)
@@ -145,7 +145,7 @@ 
 expr_location_or (tree t, location_t loc)
 {
   location_t tloc = EXPR_LOCATION (t);
-  return tloc != UNKNOWN_LOCATION ? tloc : loc;
+  return IS_UNKNOWN_LOCATION (tloc) ? loc : tloc;
 }

 /* Similar to protected_set_expr_location, but never modify x in place,
Index: gcc/toplev.c
===================================================================
--- gcc/toplev.c	(revision 189835)
+++ gcc/toplev.c	(working copy)
@@ -1140,6 +1140,7 @@ 
   linemap_init (line_table);
   line_table->reallocator = realloc_for_line_map;
   line_table->round_alloc_size = ggc_round_alloc_size;
+  location_block_init ();
   init_ttree ();

   /* Initialize register usage now so switches may override.  */
@@ -1946,6 +1947,7 @@ 
   invoke_plugin_callbacks (PLUGIN_FINISH, NULL);

   finalize_plugins ();
+  location_block_fini ();
   if (seen_error ())
     return (FATAL_EXIT_CODE);

Index: gcc/reorg.c
===================================================================
--- gcc/reorg.c	(revision 189835)
+++ gcc/reorg.c	(working copy)
@@ -545,7 +545,7 @@ 
   INSN_DELETED_P (delay_insn) = 0;
   PREV_INSN (delay_insn) = PREV_INSN (seq_insn);

-  INSN_LOCATOR (seq_insn) = INSN_LOCATOR (delay_insn);
+  INSN_LOCATION (seq_insn) = INSN_LOCATION (delay_insn);

   for (li = list; li; li = XEXP (li, 1), i++)
     {
@@ -561,9 +561,9 @@ 

       /* SPARC assembler, for instance, emit warning when debug info is output
          into the delay slot.  */
-      if (INSN_LOCATOR (tem) && !INSN_LOCATOR (seq_insn))
-	INSN_LOCATOR (seq_insn) = INSN_LOCATOR (tem);
-      INSN_LOCATOR (tem) = 0;
+      if (INSN_LOCATION (tem) && !INSN_LOCATION (seq_insn))
+	INSN_LOCATION (seq_insn) = INSN_LOCATION (tem);
+      INSN_LOCATION (tem) = 0;

       for (note = REG_NOTES (tem); note; note = next)
 	{
@@ -4087,7 +4087,7 @@ 
     for (link = crtl->epilogue_delay_list;
          link;
          link = XEXP (link, 1))
-      INSN_LOCATOR (XEXP (link, 0)) = 0;
+      INSN_LOCATION (XEXP (link, 0)) = 0;
   }

 #endif
Index: gcc/modulo-sched.c
===================================================================
--- gcc/modulo-sched.c	(revision 189835)
+++ gcc/modulo-sched.c	(working copy)
@@ -1246,9 +1246,9 @@ 
 /* Dump file:line from INSN's location info to dump_file.  */

 static void
-dump_insn_locator (rtx insn)
+dump_insn_location (rtx insn)
 {
-  if (dump_file && INSN_LOCATOR (insn))
+  if (dump_file && INSN_LOCATION (insn))
     {
       const char *file = insn_file (insn);
       if (file)
@@ -1282,7 +1282,7 @@ 
 	  rtx insn = BB_END (loop->header);

 	  fprintf (dump_file, "SMS loop many exits");
-	  dump_insn_locator (insn);
+	  dump_insn_location (insn);
 	  fprintf (dump_file, "\n");
 	}
       return false;
@@ -1295,7 +1295,7 @@ 
 	  rtx insn = BB_END (loop->header);

 	  fprintf (dump_file, "SMS loop many BBs.");
-	  dump_insn_locator (insn);
+	  dump_insn_location (insn);
 	  fprintf (dump_file, "\n");
 	}
       return false;
@@ -1421,7 +1421,7 @@ 
 	  rtx insn = BB_END (loop->header);

 	  fprintf (dump_file, "SMS loop num: %d", loop->num);
-	  dump_insn_locator (insn);
+	  dump_insn_location (insn);
 	  fprintf (dump_file, "\n");
 	}

@@ -1450,7 +1450,7 @@ 
 	{
 	  if (dump_file)
 	    {
-	      dump_insn_locator (tail);
+	      dump_insn_location (tail);
 	      fprintf (dump_file, "\nSMS single-bb-loop\n");
 	      if (profile_info && flag_branch_probabilities)
 	    	{
@@ -1556,7 +1556,7 @@ 
 	  rtx insn = BB_END (loop->header);

 	  fprintf (dump_file, "SMS loop num: %d", loop->num);
-	  dump_insn_locator (insn);
+	  dump_insn_location (insn);
 	  fprintf (dump_file, "\n");

 	  print_ddg (dump_file, g);
@@ -1571,7 +1571,7 @@ 

       if (dump_file)
 	{
-	  dump_insn_locator (tail);
+	  dump_insn_location (tail);
 	  fprintf (dump_file, "\nSMS single-bb-loop\n");
 	  if (profile_info && flag_branch_probabilities)
 	    {
@@ -1714,7 +1714,7 @@ 

           if (dump_file)
             {
-	      dump_insn_locator (tail);
+	      dump_insn_location (tail);
 	      fprintf (dump_file, " SMS succeeded %d %d (with ii, sc)\n",
 		       ps->ii, stage_count);
 	      print_partial_schedule (ps, dump_file);
Index: gcc/lto-streamer-out.c
===================================================================
--- gcc/lto-streamer-out.c	(revision 189835)
+++ gcc/lto-streamer-out.c	(working copy)
@@ -155,6 +155,7 @@ 
 {
   expanded_location xloc;

+  loc = LOCATION_LOCUS (loc);
   bp_pack_value (bp, loc == UNKNOWN_LOCATION, 1);
   if (loc == UNKNOWN_LOCATION)
     return;
Index: gcc/jump.c
===================================================================
--- gcc/jump.c	(revision 189835)
+++ gcc/jump.c	(working copy)
@@ -1818,8 +1818,7 @@ 
 	  if (XINT (x, i) != XINT (y, i))
 	    {
 	      if (((code == ASM_OPERANDS && i == 6)
-		   || (code == ASM_INPUT && i == 1))
-		  && locator_eq (XINT (x, i), XINT (y, i)))
+		   || (code == ASM_INPUT && i == 1)))
 		break;
 	      return 0;
 	    }
Index: gcc/ifcvt.c
===================================================================
--- gcc/ifcvt.c	(revision 189835)
+++ gcc/ifcvt.c	(working copy)
@@ -1019,7 +1019,7 @@ 
 	    return FALSE;

 	  emit_insn_before_setloc (seq, if_info->jump,
-				   INSN_LOCATOR (if_info->insn_a));
+				   INSN_LOCATION (if_info->insn_a));
 	}
       return TRUE;
     }
@@ -1064,7 +1064,7 @@ 
 	return FALSE;

       emit_insn_before_setloc (seq, if_info->jump,
-			       INSN_LOCATOR (if_info->insn_a));
+			       INSN_LOCATION (if_info->insn_a));
       return TRUE;
     }
   else
@@ -1195,7 +1195,7 @@ 
 	return FALSE;

       emit_insn_before_setloc (seq, if_info->jump,
-			       INSN_LOCATOR (if_info->insn_a));
+			       INSN_LOCATION (if_info->insn_a));
       return TRUE;
     }

@@ -1243,7 +1243,7 @@ 
 		return FALSE;

 	      emit_insn_before_setloc (seq, if_info->jump,
-				       INSN_LOCATOR (if_info->insn_a));
+				       INSN_LOCATION (if_info->insn_a));
 	      return TRUE;
 	    }
 	  end_sequence ();
@@ -1283,7 +1283,7 @@ 
 		return FALSE;

 	      emit_insn_before_setloc (seq, if_info->jump,
-				       INSN_LOCATOR (if_info->insn_a));
+				       INSN_LOCATION (if_info->insn_a));
 	      return TRUE;
 	    }
 	  end_sequence ();
@@ -1332,7 +1332,7 @@ 
 	    return FALSE;

 	  emit_insn_before_setloc (seq, if_info->jump,
-				   INSN_LOCATOR (if_info->insn_a));
+				   INSN_LOCATION (if_info->insn_a));
 	  return TRUE;
 	}

@@ -1481,7 +1481,7 @@ 
 	    return FALSE;

 	  emit_insn_before_setloc (seq, if_info->jump,
-				   INSN_LOCATOR (if_info->insn_a));
+				   INSN_LOCATION (if_info->insn_a));
 	  return TRUE;
 	}
       else
@@ -1682,7 +1682,7 @@ 
   if (!tmp)
     return FALSE;

-  emit_insn_before_setloc (tmp, if_info->jump, INSN_LOCATOR (if_info->insn_a));
+  emit_insn_before_setloc (tmp, if_info->jump, INSN_LOCATION
(if_info->insn_a));
   return TRUE;

  end_seq_and_fail:
@@ -1929,7 +1929,7 @@ 
   if (!seq)
     return FALSE;

-  emit_insn_before_setloc (seq, if_info->jump, INSN_LOCATOR (if_info->insn_a));
+  emit_insn_before_setloc (seq, if_info->jump, INSN_LOCATION
(if_info->insn_a));
   if_info->cond = cond;
   if_info->cond_earliest = earliest;

@@ -2076,7 +2076,7 @@ 
   if (!seq)
     return FALSE;

-  emit_insn_before_setloc (seq, if_info->jump, INSN_LOCATOR (if_info->insn_a));
+  emit_insn_before_setloc (seq, if_info->jump, INSN_LOCATION
(if_info->insn_a));
   if_info->cond = cond;
   if_info->cond_earliest = earliest;

@@ -2155,7 +2155,7 @@ 
   if (!seq)
     return FALSE;

-  emit_insn_before_setloc (seq, if_info->jump, INSN_LOCATOR (if_info->insn_a));
+  emit_insn_before_setloc (seq, if_info->jump, INSN_LOCATION
(if_info->insn_a));
   return TRUE;
 }

@@ -2255,7 +2255,7 @@ 
 	return FALSE;

       emit_insn_before_setloc (seq, if_info->jump,
-			       INSN_LOCATOR (if_info->insn_a));
+			       INSN_LOCATION (if_info->insn_a));
     }
   return TRUE;
 }
@@ -2656,7 +2656,7 @@ 
       unshare_all_rtl_in_chain (seq);
       end_sequence ();

-      emit_insn_before_setloc (seq, BB_END (test_bb), INSN_LOCATOR (insn_a));
+      emit_insn_before_setloc (seq, BB_END (test_bb), INSN_LOCATION (insn_a));
     }

   /* The original THEN and ELSE blocks may now be removed.  The test block
@@ -2937,7 +2937,7 @@ 
       loc_insn = first_active_insn (else_bb);
       gcc_assert (loc_insn);
     }
-  emit_insn_before_setloc (seq, jump, INSN_LOCATOR (loc_insn));
+  emit_insn_before_setloc (seq, jump, INSN_LOCATION (loc_insn));

   if (else_bb)
     {
@@ -3655,7 +3655,7 @@ 
     return FALSE;

   /* Emit the new insns before cond_earliest.  */
-  emit_insn_before_setloc (seq, cond_earliest, INSN_LOCATOR (trap));
+  emit_insn_before_setloc (seq, cond_earliest, INSN_LOCATION (trap));

   /* Delete the trap block if possible.  */
   remove_edge (trap_bb == then_bb ? then_edge : else_edge);
Index: gcc/dwarf2out.c
===================================================================
--- gcc/dwarf2out.c	(revision 189835)
+++ gcc/dwarf2out.c	(working copy)
@@ -15506,7 +15506,7 @@ 
 {
   expanded_location s;

-  if (DECL_SOURCE_LOCATION (decl) == UNKNOWN_LOCATION)
+  if (IS_UNKNOWN_LOCATION (DECL_SOURCE_LOCATION (decl)))
     return;
   s = expand_location (DECL_SOURCE_LOCATION (decl));
   add_AT_file (die, DW_AT_decl_file, lookup_filename (s.file));
Index: gcc/expr.c
===================================================================
--- gcc/expr.c	(revision 189835)
+++ gcc/expr.c	(working copy)
@@ -7802,19 +7802,14 @@ 
   if (cfun && EXPR_HAS_LOCATION (exp))
     {
       location_t saved_location = input_location;
-      location_t saved_curr_loc = get_curr_insn_source_location ();
-      tree saved_block = get_curr_insn_block ();
+      location_t saved_curr_loc = curr_insn_location ();
       input_location = EXPR_LOCATION (exp);
-      set_curr_insn_source_location (input_location);
-
-      /* Record where the insns produced belong.  */
-      set_curr_insn_block (TREE_BLOCK (exp));
+      set_curr_insn_location (input_location);

       ret = expand_expr_real_1 (exp, target, tmode, modifier, alt_rtl);

       input_location = saved_location;
-      set_curr_insn_block (saved_block);
-      set_curr_insn_source_location (saved_curr_loc);
+      set_curr_insn_location (saved_curr_loc);
     }
   else
     {
Index: gcc/predict.c
===================================================================
--- gcc/predict.c	(revision 189835)
+++ gcc/predict.c	(working copy)
@@ -2177,7 +2177,7 @@ 
 {
   unsigned nb_loops;

-  loop_optimizer_init (0);
+  loop_optimizer_init (LOOPS_NORMAL);
   if (dump_file && (dump_flags & TDF_DETAILS))
     flow_loops_dump (dump_file, NULL, 0);

Index: gcc/tree-parloops.c
===================================================================
--- gcc/tree-parloops.c	(revision 189835)
+++ gcc/tree-parloops.c	(working copy)
@@ -1415,6 +1415,7 @@ 
   struct function *act_cfun = cfun;
   static unsigned loopfn_num;

+  loc = LOCATION_LOCUS (loc);
   snprintf (buf, 100, "%s.$loopfn", current_function_name ());
   ASM_FORMAT_PRIVATE_NAME (tname, buf, loopfn_num++);
   clean_symbol_name (tname);
Index: gcc/recog.c
===================================================================
--- gcc/recog.c	(revision 189835)
+++ gcc/recog.c	(working copy)
@@ -3333,7 +3333,7 @@ 
   /* Replace the old sequence with the new.  */
   last = emit_insn_after_setloc (attempt,
 				 peep2_insn_data[i].insn,
-				 INSN_LOCATOR (peep2_insn_data[i].insn));
+				 INSN_LOCATION (peep2_insn_data[i].insn));
   before_try = PREV_INSN (insn);
   delete_insn_chain (insn, peep2_insn_data[i].insn, false);

Index: gcc/function.c
===================================================================
--- gcc/function.c	(revision 189835)
+++ gcc/function.c	(working copy)
@@ -133,7 +133,7 @@ 
 static void prepare_function_start (void);
 static void do_clobber_return_reg (rtx, void *);
 static void do_use_return_reg (rtx, void *);
-static void set_insn_locators (rtx, int) ATTRIBUTE_UNUSED;
+static void set_insn_locations (rtx, int) ATTRIBUTE_UNUSED;
 
 /* Stack of nested functions.  */
 /* Keep track of the cfun stack.  */
@@ -200,7 +200,6 @@ 
   f->cfg = NULL;

   regno_reg_rtx = NULL;
-  insn_locators_free ();
 }
 
 /* Return size needed for stack frame based on slots so far allocated.
@@ -4979,7 +4978,7 @@ 
 	      probe_stack_range (STACK_OLD_CHECK_PROTECT, max_frame_size);
 	    seq = get_insns ();
 	    end_sequence ();
-	    set_insn_locators (seq, prologue_locator);
+	    set_insn_locations (seq, prologue_location);
 	    emit_insn_before (seq, stack_check_probe_note);
 	    break;
 	  }
@@ -4994,7 +4993,7 @@ 

   /* Output a linenumber for the end of the function.
      SDB depends on this.  */
-  set_curr_insn_source_location (input_location);
+  set_curr_insn_location (input_location);

   /* Before the return label (if any), clobber the return
      registers so that they are not propagated live to the rest of
@@ -5277,14 +5276,14 @@ 
   *slot = copy;
 }

-/* Set the locator of the insn chain starting at INSN to LOC.  */
+/* Set the location of the insn chain starting at INSN to LOC.  */
 static void
-set_insn_locators (rtx insn, int loc)
+set_insn_locations (rtx insn, int loc)
 {
   while (insn != NULL_RTX)
     {
       if (INSN_P (insn))
-	INSN_LOCATOR (insn) = loc;
+	INSN_LOCATION (insn) = loc;
       insn = NEXT_INSN (insn);
     }
 }
@@ -5893,7 +5892,7 @@ 
       end_sequence ();

       record_insns (split_prologue_seq, NULL, &prologue_insn_hash);
-      set_insn_locators (split_prologue_seq, prologue_locator);
+      set_insn_locations (split_prologue_seq, prologue_location);
 #endif
     }

@@ -5922,7 +5921,7 @@ 

       prologue_seq = get_insns ();
       end_sequence ();
-      set_insn_locators (prologue_seq, prologue_locator);
+      set_insn_locations (prologue_seq, prologue_location);
     }
 #endif

@@ -6418,7 +6417,7 @@ 

       /* Retain a map of the epilogue insns.  */
       record_insns (seq, NULL, &epilogue_insn_hash);
-      set_insn_locators (seq, epilogue_locator);
+      set_insn_locations (seq, epilogue_location);

       seq = get_insns ();
       returnjump = get_last_insn ();
@@ -6608,7 +6607,7 @@ 
 	     avoid getting rid of sibcall epilogue insns.  Do this before we
 	     actually emit the sequence.  */
 	  record_insns (seq, NULL, &epilogue_insn_hash);
-	  set_insn_locators (seq, epilogue_locator);
+	  set_insn_locations (seq, epilogue_location);

 	  emit_insn_before (seq, insn);
 	}
Index: gcc/print-rtl.c
===================================================================
--- gcc/print-rtl.c	(revision 189835)
+++ gcc/print-rtl.c	(working copy)
@@ -416,10 +416,10 @@ 
 	if (i == 5 && INSN_P (in_rtx))
 	  {
 #ifndef GENERATOR_FILE
-	    /*  Pretty-print insn locators.  Ignore scoping as it is mostly
+	    /*  Pretty-print insn locations.  Ignore scoping as it is mostly
 		redundant with line number information and do not print anything
 		when there is no location information available.  */
-	    if (INSN_LOCATOR (in_rtx) && insn_file (in_rtx))
+	    if (INSN_LOCATION (in_rtx) && insn_file (in_rtx))
 	      fprintf(outfile, " %s:%i", insn_file (in_rtx), insn_line (in_rtx));
 #endif
 	  }
@@ -427,16 +427,16 @@ 
 	  {
 #ifndef GENERATOR_FILE
 	    fprintf (outfile, " %s:%i",
-		     locator_file (ASM_OPERANDS_SOURCE_LOCATION (in_rtx)),
-		     locator_line (ASM_OPERANDS_SOURCE_LOCATION (in_rtx)));
+		     LOCATION_FILE (ASM_OPERANDS_SOURCE_LOCATION (in_rtx)),
+		     LOCATION_LINE (ASM_OPERANDS_SOURCE_LOCATION (in_rtx)));
 #endif
 	  }
 	else if (i == 1 && GET_CODE (in_rtx) == ASM_INPUT)
 	  {
 #ifndef GENERATOR_FILE
 	    fprintf (outfile, " %s:%i",
-		     locator_file (ASM_INPUT_SOURCE_LOCATION (in_rtx)),
-		     locator_line (ASM_INPUT_SOURCE_LOCATION (in_rtx)));
+		     LOCATION_FILE (ASM_INPUT_SOURCE_LOCATION (in_rtx)),
+		     LOCATION_LINE (ASM_INPUT_SOURCE_LOCATION (in_rtx)));
 #endif
 	  }
 	else if (i == 6 && NOTE_P (in_rtx))
Index: gcc/profile.c
===================================================================
--- gcc/profile.c	(revision 189835)
+++ gcc/profile.c	(working copy)
@@ -966,7 +966,7 @@ 
 	     is not computed twice.  */
 	  if (last
 	      && gimple_has_location (last)
-	      && e->goto_locus != UNKNOWN_LOCATION
+	      && !IS_UNKNOWN_LOCATION (e->goto_locus)
 	      && !single_succ_p (bb)
 	      && (LOCATION_FILE (e->goto_locus)
 	          != LOCATION_FILE (gimple_location (last))
@@ -976,7 +976,6 @@ 
 	      basic_block new_bb = split_edge (e);
 	      edge ne = single_succ_edge (new_bb);
 	      ne->goto_locus = e->goto_locus;
-	      ne->goto_block = e->goto_block;
 	    }
 	  if ((e->flags & (EDGE_ABNORMAL | EDGE_ABNORMAL_CALL))
 	       && e->dest != EXIT_BLOCK_PTR)
@@ -1188,7 +1187,7 @@ 

 	  /* Notice GOTO expressions eliminated while constructing the CFG.  */
 	  if (single_succ_p (bb)
-	      && single_succ_edge (bb)->goto_locus != UNKNOWN_LOCATION)
+	      && !IS_UNKNOWN_LOCATION (single_succ_edge (bb)->goto_locus))
 	    {
 	      expanded_location curr_location
 		= expand_location (single_succ_edge (bb)->goto_locus);
Index: gcc/trans-mem.c
===================================================================
--- gcc/trans-mem.c	(revision 189835)
+++ gcc/trans-mem.c	(working copy)
@@ -3796,7 +3796,6 @@ 
 	    {
 	      tree t = build1 (NOP_EXPR, void_type_node, size_zero_node);
 	      SET_EXPR_LOCATION (t, gimple_location (stmt));
-	      TREE_BLOCK (t) = gimple_block (stmt);
 	      error ("%Kasm not allowed in %<transaction_safe%> function", t);
 	    }
 	  return true;
Index: gcc/gimplify.c
===================================================================
--- gcc/gimplify.c	(revision 189835)
+++ gcc/gimplify.c	(working copy)
@@ -2600,7 +2600,6 @@ 
 	    = CALL_EXPR_RETURN_SLOT_OPT (call);
 	  CALL_FROM_THUNK_P (*expr_p) = CALL_FROM_THUNK_P (call);
 	  SET_EXPR_LOCATION (*expr_p, EXPR_LOCATION (call));
-	  TREE_BLOCK (*expr_p) = TREE_BLOCK (call);

 	  /* Set CALL_EXPR_VA_ARG_PACK.  */
 	  CALL_EXPR_VA_ARG_PACK (*expr_p) = 1;
Index: gcc/except.c
===================================================================
--- gcc/except.c	(revision 189835)
+++ gcc/except.c	(working copy)
@@ -526,7 +526,10 @@ 
       break;

     case ERT_MUST_NOT_THROW:
-      new_r->u.must_not_throw = old_r->u.must_not_throw;
+      new_r->u.must_not_throw.failure_loc =
+	LOCATION_LOCUS (old_r->u.must_not_throw.failure_loc);
+      new_r->u.must_not_throw.failure_decl =
+	old_r->u.must_not_throw.failure_decl;
       break;
     }

Index: gcc/emit-rtl.c
===================================================================
--- gcc/emit-rtl.c	(revision 189835)
+++ gcc/emit-rtl.c	(working copy)
@@ -3634,7 +3634,7 @@ 
 	}
     }

-  tem = emit_insn_after_setloc (seq, trial, INSN_LOCATOR (trial));
+  tem = emit_insn_after_setloc (seq, trial, INSN_LOCATION (trial));

   delete_insn (trial);
   if (has_barrier)
@@ -3670,7 +3670,7 @@ 
   PATTERN (insn) = pattern;
   INSN_CODE (insn) = -1;
   REG_NOTES (insn) = NULL;
-  INSN_LOCATOR (insn) = curr_insn_locator ();
+  INSN_LOCATION (insn) = curr_insn_location ();
   BLOCK_FOR_INSN (insn) = NULL;

 #ifdef ENABLE_RTL_CHECKING
@@ -3703,7 +3703,7 @@ 
   PATTERN (insn) = pattern;
   INSN_CODE (insn) = -1;
   REG_NOTES (insn) = NULL;
-  INSN_LOCATOR (insn) = curr_insn_locator ();
+  INSN_LOCATION (insn) = curr_insn_location ();
   BLOCK_FOR_INSN (insn) = NULL;

   return insn;
@@ -3723,7 +3723,7 @@ 
   INSN_CODE (insn) = -1;
   REG_NOTES (insn) = NULL;
   JUMP_LABEL (insn) = NULL;
-  INSN_LOCATOR (insn) = curr_insn_locator ();
+  INSN_LOCATION (insn) = curr_insn_location ();
   BLOCK_FOR_INSN (insn) = NULL;

   return insn;
@@ -3743,7 +3743,7 @@ 
   INSN_CODE (insn) = -1;
   REG_NOTES (insn) = NULL;
   CALL_INSN_FUNCTION_USAGE (insn) = NULL;
-  INSN_LOCATOR (insn) = curr_insn_locator ();
+  INSN_LOCATION (insn) = curr_insn_location ();
   BLOCK_FOR_INSN (insn) = NULL;

   return insn;
@@ -4416,8 +4416,8 @@ 
   after = NEXT_INSN (after);
   while (1)
     {
-      if (active_insn_p (after) && !INSN_LOCATOR (after))
-	INSN_LOCATOR (after) = loc;
+      if (active_insn_p (after) && !INSN_LOCATION (after))
+	INSN_LOCATION (after) = loc;
       if (after == last)
 	break;
       after = NEXT_INSN (after);
@@ -4440,62 +4440,62 @@ 
       prev = PREV_INSN (prev);

   if (INSN_P (prev))
-    return emit_pattern_after_setloc (pattern, after, INSN_LOCATOR (prev),
+    return emit_pattern_after_setloc (pattern, after, INSN_LOCATION (prev),
 				      make_raw);
   else
     return emit_pattern_after_noloc (pattern, after, NULL, make_raw);
 }

-/* Like emit_insn_after_noloc, but set INSN_LOCATOR according to LOC.  */
+/* Like emit_insn_after_noloc, but set INSN_LOCATION according to LOC.  */
 rtx
 emit_insn_after_setloc (rtx pattern, rtx after, int loc)
 {
   return emit_pattern_after_setloc (pattern, after, loc, make_insn_raw);
 }

-/* Like emit_insn_after_noloc, but set INSN_LOCATOR according to AFTER.  */
+/* Like emit_insn_after_noloc, but set INSN_LOCATION according to AFTER.  */
 rtx
 emit_insn_after (rtx pattern, rtx after)
 {
   return emit_pattern_after (pattern, after, true, make_insn_raw);
 }

-/* Like emit_jump_insn_after_noloc, but set INSN_LOCATOR according to LOC.  */
+/* Like emit_jump_insn_after_noloc, but set INSN_LOCATION according to LOC.  */
 rtx
 emit_jump_insn_after_setloc (rtx pattern, rtx after, int loc)
 {
   return emit_pattern_after_setloc (pattern, after, loc, make_jump_insn_raw);
 }

-/* Like emit_jump_insn_after_noloc, but set INSN_LOCATOR according to
AFTER.  */
+/* Like emit_jump_insn_after_noloc, but set INSN_LOCATION according
to AFTER.  */
 rtx
 emit_jump_insn_after (rtx pattern, rtx after)
 {
   return emit_pattern_after (pattern, after, true, make_jump_insn_raw);
 }

-/* Like emit_call_insn_after_noloc, but set INSN_LOCATOR according to LOC.  */
+/* Like emit_call_insn_after_noloc, but set INSN_LOCATION according to LOC.  */
 rtx
 emit_call_insn_after_setloc (rtx pattern, rtx after, int loc)
 {
   return emit_pattern_after_setloc (pattern, after, loc, make_call_insn_raw);
 }

-/* Like emit_call_insn_after_noloc, but set INSN_LOCATOR according to
AFTER.  */
+/* Like emit_call_insn_after_noloc, but set INSN_LOCATION according
to AFTER.  */
 rtx
 emit_call_insn_after (rtx pattern, rtx after)
 {
   return emit_pattern_after (pattern, after, true, make_call_insn_raw);
 }

-/* Like emit_debug_insn_after_noloc, but set INSN_LOCATOR according to LOC.  */
+/* Like emit_debug_insn_after_noloc, but set INSN_LOCATION according
to LOC.  */
 rtx
 emit_debug_insn_after_setloc (rtx pattern, rtx after, int loc)
 {
   return emit_pattern_after_setloc (pattern, after, loc, make_debug_insn_raw);
 }

-/* Like emit_debug_insn_after_noloc, but set INSN_LOCATOR according
to AFTER.  */
+/* Like emit_debug_insn_after_noloc, but set INSN_LOCATION according
to AFTER.  */
 rtx
 emit_debug_insn_after (rtx pattern, rtx after)
 {
@@ -4525,8 +4525,8 @@ 
     first = NEXT_INSN (first);
   while (1)
     {
-      if (active_insn_p (first) && !INSN_LOCATOR (first))
-	INSN_LOCATOR (first) = loc;
+      if (active_insn_p (first) && !INSN_LOCATION (first))
+	INSN_LOCATION (first) = loc;
       if (first == last)
 	break;
       first = NEXT_INSN (first);
@@ -4550,7 +4550,7 @@ 
       next = PREV_INSN (next);

   if (INSN_P (next))
-    return emit_pattern_before_setloc (pattern, before, INSN_LOCATOR (next),
+    return emit_pattern_before_setloc (pattern, before, INSN_LOCATION (next),
 				       insnp, make_raw);
   else
     return emit_pattern_before_noloc (pattern, before,
@@ -4558,7 +4558,7 @@ 
                                       NULL, make_raw);
 }

-/* Like emit_insn_before_noloc, but set INSN_LOCATOR according to LOC.  */
+/* Like emit_insn_before_noloc, but set INSN_LOCATION according to LOC.  */
 rtx
 emit_insn_before_setloc (rtx pattern, rtx before, int loc)
 {
@@ -4566,14 +4566,14 @@ 
 				     make_insn_raw);
 }

-/* Like emit_insn_before_noloc, but set INSN_LOCATOR according to BEFORE.  */
+/* Like emit_insn_before_noloc, but set INSN_LOCATION according to BEFORE.  */
 rtx
 emit_insn_before (rtx pattern, rtx before)
 {
   return emit_pattern_before (pattern, before, true, true, make_insn_raw);
 }

-/* like emit_insn_before_noloc, but set INSN_LOCATOR according to LOC.  */
+/* like emit_insn_before_noloc, but set INSN_LOCATION according to LOC.  */
 rtx
 emit_jump_insn_before_setloc (rtx pattern, rtx before, int loc)
 {
@@ -4581,7 +4581,7 @@ 
 				     make_jump_insn_raw);
 }

-/* Like emit_jump_insn_before_noloc, but set INSN_LOCATOR according
to BEFORE.  */
+/* Like emit_jump_insn_before_noloc, but set INSN_LOCATION according
to BEFORE.  */
 rtx
 emit_jump_insn_before (rtx pattern, rtx before)
 {
@@ -4589,7 +4589,7 @@ 
 			      make_jump_insn_raw);
 }

-/* Like emit_insn_before_noloc, but set INSN_LOCATOR according to LOC.  */
+/* Like emit_insn_before_noloc, but set INSN_LOCATION according to LOC.  */
 rtx
 emit_call_insn_before_setloc (rtx pattern, rtx before, int loc)
 {
@@ -4598,7 +4598,7 @@ 
 }

 /* Like emit_call_insn_before_noloc,
-   but set insn_locator according to BEFORE.  */
+   but set insn_location according to BEFORE.  */
 rtx
 emit_call_insn_before (rtx pattern, rtx before)
 {
@@ -4606,7 +4606,7 @@ 
 			      make_call_insn_raw);
 }

-/* Like emit_insn_before_noloc, but set INSN_LOCATOR according to LOC.  */
+/* Like emit_insn_before_noloc, but set INSN_LOCATION according to LOC.  */
 rtx
 emit_debug_insn_before_setloc (rtx pattern, rtx before, int loc)
 {
@@ -4615,7 +4615,7 @@ 
 }

 /* Like emit_debug_insn_before_noloc,
-   but set insn_locator according to BEFORE.  */
+   but set insn_location according to BEFORE.  */
 rtx
 emit_debug_insn_before (rtx pattern, rtx before)
 {
@@ -5865,7 +5865,7 @@ 
   /* Update LABEL_NUSES.  */
   mark_jump_label (PATTERN (new_rtx), new_rtx, 0);

-  INSN_LOCATOR (new_rtx) = INSN_LOCATOR (insn);
+  INSN_LOCATION (new_rtx) = INSN_LOCATION (insn);

   /* If the old insn is frame related, then so is the new one.  This is
      primarily needed for IA-64 unwind info which marks epilogue insns,
@@ -5900,250 +5900,66 @@ 
 	    gen_rtx_CLOBBER (VOIDmode, gen_rtx_REG (mode, regno)));
 }

-/* Data structures representing mapping of INSN_LOCATOR into scope blocks, line
-   numbers and files.  In order to be GGC friendly we need to use separate
-   varrays.  This also slightly improve the memory locality in binary search.
-   The _locs array contains locators where the given property change.  The
-   block_locators_blocks contains the scope block that is used for all insn
-   locator greater than corresponding block_locators_locs value and smaller
-   than the following one.  Similarly for the other properties.  */
-static VEC(int,heap) *block_locators_locs;
-static GTY(()) VEC(tree,gc) *block_locators_blocks;
-static VEC(int,heap) *locations_locators_locs;
-DEF_VEC_O(location_t);
-DEF_VEC_ALLOC_O(location_t,heap);
-static VEC(location_t,heap) *locations_locators_vals;
-int prologue_locator;
-int epilogue_locator;
+location_t prologue_location;
+location_t epilogue_location;

 /* Hold current location information and last location information, so the
    datastructures are built lazily only when some instructions in given
    place are needed.  */
 static location_t curr_location, last_location;
-static tree curr_block, last_block;
-static int curr_rtl_loc = -1;

-/* Allocate insn locator datastructure.  */
+/* Allocate insn location datastructure.  */
 void
-insn_locators_alloc (void)
+insn_locations_init (void)
 {
-  prologue_locator = epilogue_locator = 0;
-
-  block_locators_locs = VEC_alloc (int, heap, 32);
-  block_locators_blocks = VEC_alloc (tree, gc, 32);
-  locations_locators_locs = VEC_alloc (int, heap, 32);
-  locations_locators_vals = VEC_alloc (location_t, heap, 32);
-
+  prologue_location = epilogue_location = 0;
   curr_location = UNKNOWN_LOCATION;
   last_location = UNKNOWN_LOCATION;
-  curr_block = NULL;
-  last_block = NULL;
-  curr_rtl_loc = 0;
 }

 /* At the end of emit stage, clear current location.  */
 void
-insn_locators_finalize (void)
-{
-  if (curr_rtl_loc >= 0)
-    epilogue_locator = curr_insn_locator ();
-  curr_rtl_loc = -1;
-}
-
-/* Allocate insn locator datastructure.  */
-void
-insn_locators_free (void)
+insn_locations_finalize (void)
 {
-  prologue_locator = epilogue_locator = 0;
-
-  VEC_free (int, heap, block_locators_locs);
-  VEC_free (tree,gc, block_locators_blocks);
-  VEC_free (int, heap, locations_locators_locs);
-  VEC_free (location_t, heap, locations_locators_vals);
+  epilogue_location = curr_location;
+  curr_location = UNKNOWN_LOCATION;
 }

 /* Set current location.  */
 void
-set_curr_insn_source_location (location_t location)
+set_curr_insn_location (location_t location)
 {
-  /* IV opts calls into RTL expansion to compute costs of operations.  At this
-     time locators are not initialized.  */
-  if (curr_rtl_loc == -1)
-    return;
   curr_location = location;
 }

 /* Get current location.  */
 location_t
-get_curr_insn_source_location (void)
+curr_insn_location (void)
 {
   return curr_location;
 }

-/* Set current scope block.  */
-void
-set_curr_insn_block (tree b)
-{
-  /* IV opts calls into RTL expansion to compute costs of operations.  At this
-     time locators are not initialized.  */
-  if (curr_rtl_loc == -1)
-    return;
-  if (b)
-    curr_block = b;
-}
-
-/* Get current scope block.  */
-tree
-get_curr_insn_block (void)
-{
-  return curr_block;
-}
-
-/* Return current insn locator.  */
-int
-curr_insn_locator (void)
-{
-  if (curr_rtl_loc == -1 || curr_location == UNKNOWN_LOCATION)
-    return 0;
-  if (last_block != curr_block)
-    {
-      curr_rtl_loc++;
-      VEC_safe_push (int, heap, block_locators_locs, curr_rtl_loc);
-      VEC_safe_push (tree, gc, block_locators_blocks, curr_block);
-      last_block = curr_block;
-    }
-  if (last_location != curr_location)
-    {
-      curr_rtl_loc++;
-      VEC_safe_push (int, heap, locations_locators_locs, curr_rtl_loc);
-      VEC_safe_push (location_t, heap, locations_locators_vals,
&curr_location);
-      last_location = curr_location;
-    }
-  return curr_rtl_loc;
-}
-
-
-/* Return lexical scope block locator belongs to.  */
-static tree
-locator_scope (int loc)
-{
-  int max = VEC_length (int, block_locators_locs);
-  int min = 0;
-
-  /* When block_locators_locs was initialized, the pro- and epilogue
-     insns didn't exist yet and can therefore not be found this way.
-     But we know that they belong to the outer most block of the
-     current function.
-     Without this test, the prologue would be put inside the block of
-     the first valid instruction in the function and when that first
-     insn is part of an inlined function then the low_pc of that
-     inlined function is messed up.  Likewise for the epilogue and
-     the last valid instruction.  */
-  if (loc == prologue_locator || loc == epilogue_locator)
-    return DECL_INITIAL (cfun->decl);
-
-  if (!max || !loc)
-    return NULL;
-  while (1)
-    {
-      int pos = (min + max) / 2;
-      int tmp = VEC_index (int, block_locators_locs, pos);
-
-      if (tmp <= loc && min != pos)
-	min = pos;
-      else if (tmp > loc && max != pos)
-	max = pos;
-      else
-	{
-	  min = pos;
-	  break;
-	}
-    }
-  return VEC_index (tree, block_locators_blocks, min);
-}
-
 /* Return lexical scope block insn belongs to.  */
 tree
 insn_scope (const_rtx insn)
 {
-  return locator_scope (INSN_LOCATOR (insn));
-}
-
-/* Return line number of the statement specified by the locator.  */
-location_t
-locator_location (int loc)
-{
-  int max = VEC_length (int, locations_locators_locs);
-  int min = 0;
-
-  while (1)
-    {
-      int pos = (min + max) / 2;
-      int tmp = VEC_index (int, locations_locators_locs, pos);
-
-      if (tmp <= loc && min != pos)
-	min = pos;
-      else if (tmp > loc && max != pos)
-	max = pos;
-      else
-	{
-	  min = pos;
-	  break;
-	}
-    }
-  return *VEC_index (location_t, locations_locators_vals, min);
-}
-
-/* Return source line of the statement that produced this insn.  */
-int
-locator_line (int loc)
-{
-  expanded_location xloc;
-  if (!loc)
-    return 0;
-  else
-    xloc = expand_location (locator_location (loc));
-  return xloc.line;
+  return LOCATION_BLOCK (INSN_LOCATION (insn));
 }

 /* Return line number of the statement that produced this insn.  */
 int
 insn_line (const_rtx insn)
 {
-  return locator_line (INSN_LOCATOR (insn));
-}
-
-/* Return source file of the statement specified by LOC.  */
-const char *
-locator_file (int loc)
-{
-  expanded_location xloc;
-  if (!loc)
-    return 0;
-  else
-    xloc = expand_location (locator_location (loc));
-  return xloc.file;
+  return LOCATION_LINE (INSN_LOCATION (insn));
 }

 /* Return source file of the statement that produced this insn.  */
 const char *
 insn_file (const_rtx insn)
 {
-  return locator_file (INSN_LOCATOR (insn));
+  return LOCATION_FILE (INSN_LOCATION (insn));
 }

-/* Return true if LOC1 and LOC2 locators have the same location and scope.  */
-bool
-locator_eq (int loc1, int loc2)
-{
-  if (loc1 == loc2)
-    return true;
-  if (locator_location (loc1) != locator_location (loc2))
-    return false;
-  return locator_scope (loc1) == locator_scope (loc2);
-}
-
-
 /* Return true if memory model MODEL requires a pre-operation (release-style)
    barrier or a post-operation (acquire-style) barrier.  While not universal,
    this function matches behavior of several targets.  */
Index: gcc/cfgexpand.c
===================================================================
--- gcc/cfgexpand.c	(revision 189835)
+++ gcc/cfgexpand.c	(working copy)
@@ -92,8 +92,7 @@ 
 	   && gimple_location (stmt) != EXPR_LOCATION (t))
 	  || (gimple_block (stmt)
 	      && currently_expanding_to_rtl
-	      && EXPR_P (t)
-	      && gimple_block (stmt) != TREE_BLOCK (t)))
+	      && EXPR_P (t)))
 	t = copy_node (t);
     }
   else
@@ -101,8 +100,6 @@ 

   if (gimple_has_location (stmt) && CAN_HAVE_LOCATION_P (t))
     SET_EXPR_LOCATION (t, gimple_location (stmt));
-  if (gimple_block (stmt) && currently_expanding_to_rtl && EXPR_P (t))
-    TREE_BLOCK (t) = gimple_block (stmt);

   return t;
 }
@@ -1804,8 +1801,7 @@ 
   last2 = last = get_last_insn ();

   extract_true_false_edges_from_block (bb, &true_edge, &false_edge);
-  set_curr_insn_source_location (gimple_location (stmt));
-  set_curr_insn_block (gimple_block (stmt));
+  set_curr_insn_location (gimple_location (stmt));

   /* These flags have no purpose in RTL land.  */
   true_edge->flags &= ~EDGE_TRUE_VALUE;
@@ -1818,13 +1814,8 @@ 
       jumpif_1 (code, op0, op1, label_rtx_for_bb (true_edge->dest),
 		true_edge->probability);
       maybe_dump_rtl_for_gimple_stmt (stmt, last);
-      if (true_edge->goto_locus)
-	{
-	  set_curr_insn_source_location (true_edge->goto_locus);
-	  set_curr_insn_block (true_edge->goto_block);
-	  true_edge->goto_locus = curr_insn_locator ();
-	}
-      true_edge->goto_block = NULL;
+      if (!IS_UNKNOWN_LOCATION (true_edge->goto_locus))
+	set_curr_insn_location (true_edge->goto_locus);
       false_edge->flags |= EDGE_FALLTHRU;
       maybe_cleanup_end_of_block (false_edge, last);
       return NULL;
@@ -1834,13 +1825,8 @@ 
       jumpifnot_1 (code, op0, op1, label_rtx_for_bb (false_edge->dest),
 		   false_edge->probability);
       maybe_dump_rtl_for_gimple_stmt (stmt, last);
-      if (false_edge->goto_locus)
-	{
-	  set_curr_insn_source_location (false_edge->goto_locus);
-	  set_curr_insn_block (false_edge->goto_block);
-	  false_edge->goto_locus = curr_insn_locator ();
-	}
-      false_edge->goto_block = NULL;
+      if (!IS_UNKNOWN_LOCATION (false_edge->goto_locus))
+	set_curr_insn_location (false_edge->goto_locus);
       true_edge->flags |= EDGE_FALLTHRU;
       maybe_cleanup_end_of_block (true_edge, last);
       return NULL;
@@ -1849,13 +1835,8 @@ 
   jumpif_1 (code, op0, op1, label_rtx_for_bb (true_edge->dest),
 	    true_edge->probability);
   last = get_last_insn ();
-  if (false_edge->goto_locus)
-    {
-      set_curr_insn_source_location (false_edge->goto_locus);
-      set_curr_insn_block (false_edge->goto_block);
-      false_edge->goto_locus = curr_insn_locator ();
-    }
-  false_edge->goto_block = NULL;
+  if (!IS_UNKNOWN_LOCATION (false_edge->goto_locus))
+    set_curr_insn_location (false_edge->goto_locus);
   emit_jump (label_rtx_for_bb (false_edge->dest));

   BB_END (bb) = last;
@@ -1880,13 +1861,11 @@ 

   maybe_dump_rtl_for_gimple_stmt (stmt, last2);

-  if (true_edge->goto_locus)
+  if (!IS_UNKNOWN_LOCATION (true_edge->goto_locus))
     {
-      set_curr_insn_source_location (true_edge->goto_locus);
-      set_curr_insn_block (true_edge->goto_block);
-      true_edge->goto_locus = curr_insn_locator ();
+      set_curr_insn_location (true_edge->goto_locus);
+      true_edge->goto_locus = curr_insn_location ();
     }
-  true_edge->goto_block = NULL;

   return new_bb;
 }
@@ -1986,7 +1965,6 @@ 
     CALL_FROM_THUNK_P (exp) = gimple_call_from_thunk_p (stmt);
   CALL_EXPR_VA_ARG_PACK (exp) = gimple_call_va_arg_pack_p (stmt);
   SET_EXPR_LOCATION (exp, gimple_location (stmt));
-  TREE_BLOCK (exp) = gimple_block (stmt);

   /* Ensure RTL is created for debug args.  */
   if (decl && DECL_HAS_DEBUG_ARGS_P (decl))
@@ -2021,8 +1999,7 @@ 
 {
   tree op0;

-  set_curr_insn_source_location (gimple_location (stmt));
-  set_curr_insn_block (gimple_block (stmt));
+  set_curr_insn_location (gimple_location (stmt));

   switch (gimple_code (stmt))
     {
@@ -3766,8 +3743,7 @@ 
 	  tree op;
 	  gimple def;

-	  location_t sloc = get_curr_insn_source_location ();
-	  tree sblock = get_curr_insn_block ();
+	  location_t sloc = curr_insn_location ();

 	  /* Look for SSA names that have their last use here (TERed
 	     names always have only one real use).  */
@@ -3800,8 +3776,7 @@ 
 		    rtx val;
 		    enum machine_mode mode;

-		    set_curr_insn_source_location (gimple_location (def));
-		    set_curr_insn_block (gimple_block (def));
+		    set_curr_insn_location (gimple_location (def));

 		    DECL_ARTIFICIAL (vexpr) = 1;
 		    TREE_TYPE (vexpr) = TREE_TYPE (value);
@@ -3828,8 +3803,7 @@ 
 		      }
 		  }
 	      }
-	  set_curr_insn_source_location (sloc);
-	  set_curr_insn_block (sblock);
+	  set_curr_insn_location (sloc);
 	}

       currently_expanding_gimple_stmt = stmt;
@@ -3844,8 +3818,7 @@ 
 	}
       else if (gimple_debug_bind_p (stmt))
 	{
-	  location_t sloc = get_curr_insn_source_location ();
-	  tree sblock = get_curr_insn_block ();
+	  location_t sloc = curr_insn_location ();
 	  gimple_stmt_iterator nsi = gsi;

 	  for (;;)
@@ -3867,8 +3840,7 @@ 

 	      last = get_last_insn ();

-	      set_curr_insn_source_location (gimple_location (stmt));
-	      set_curr_insn_block (gimple_block (stmt));
+	      set_curr_insn_location (gimple_location (stmt));

 	      if (DECL_P (var))
 		mode = DECL_MODE (var);
@@ -3906,13 +3878,11 @@ 
 		break;
 	    }

-	  set_curr_insn_source_location (sloc);
-	  set_curr_insn_block (sblock);
+	  set_curr_insn_location (sloc);
 	}
       else if (gimple_debug_source_bind_p (stmt))
 	{
-	  location_t sloc = get_curr_insn_source_location ();
-	  tree sblock = get_curr_insn_block ();
+	  location_t sloc = curr_insn_location ();
 	  tree var = gimple_debug_source_bind_get_var (stmt);
 	  tree value = gimple_debug_source_bind_get_value (stmt);
 	  rtx val;
@@ -3920,8 +3890,7 @@ 

 	  last = get_last_insn ();

-	  set_curr_insn_source_location (gimple_location (stmt));
-	  set_curr_insn_block (gimple_block (stmt));
+	  set_curr_insn_location (gimple_location (stmt));

 	  mode = DECL_MODE (var);

@@ -3939,8 +3908,7 @@ 
 	      PAT_VAR_LOCATION_LOC (val) = (rtx)value;
 	    }

-	  set_curr_insn_source_location (sloc);
-	  set_curr_insn_block (sblock);
+	  set_curr_insn_location (sloc);
 	}
       else
 	{
@@ -3981,13 +3949,8 @@ 
   /* Expand implicit goto and convert goto_locus.  */
   FOR_EACH_EDGE (e, ei, bb->succs)
     {
-      if (e->goto_locus && e->goto_block)
-	{
-	  set_curr_insn_source_location (e->goto_locus);
-	  set_curr_insn_block (e->goto_block);
-	  e->goto_locus = curr_insn_locator ();
-	}
-      e->goto_block = NULL;
+      if (!IS_UNKNOWN_LOCATION (e->goto_locus))
+	set_curr_insn_location (e->goto_locus);
       if ((e->flags & EDGE_FALLTHRU) && e->dest != bb->next_bb)
 	{
 	  emit_jump (label_rtx_for_bb (e->dest));
@@ -4107,12 +4070,9 @@ 

   /* Make sure the locus is set to the end of the function, so that
      epilogue line numbers and warnings are set properly.  */
-  if (cfun->function_end_locus != UNKNOWN_LOCATION)
+  if (!IS_UNKNOWN_LOCATION (cfun->function_end_locus))
     input_location = cfun->function_end_locus;

-  /* The following insns belong to the top scope.  */
-  set_curr_insn_block (DECL_INITIAL (current_function_decl));
-
   /* Generate rtl for function exit.  */
   expand_function_end ();

@@ -4331,20 +4291,19 @@ 

   rtl_profile_for_bb (ENTRY_BLOCK_PTR);

-  insn_locators_alloc ();
+  insn_locations_init ();
   if (!DECL_IS_BUILTIN (current_function_decl))
     {
       /* Eventually, all FEs should explicitly set function_start_locus.  */
-      if (cfun->function_start_locus == UNKNOWN_LOCATION)
-       set_curr_insn_source_location
+      if (IS_UNKNOWN_LOCATION (cfun->function_start_locus))
+       set_curr_insn_location
          (DECL_SOURCE_LOCATION (current_function_decl));
       else
-       set_curr_insn_source_location (cfun->function_start_locus);
+       set_curr_insn_location (cfun->function_start_locus);
     }
   else
-    set_curr_insn_source_location (UNKNOWN_LOCATION);
-  set_curr_insn_block (DECL_INITIAL (current_function_decl));
-  prologue_locator = curr_insn_locator ();
+    set_curr_insn_location (UNKNOWN_LOCATION);
+  prologue_location = curr_insn_location ();

 #ifdef INSN_SCHEDULING
   init_sched_attrs ();
@@ -4514,8 +4473,7 @@ 
   free_histograms ();

   construct_exit_block ();
-  set_curr_insn_block (DECL_INITIAL (current_function_decl));
-  insn_locators_finalize ();
+  insn_locations_finalize ();

   /* Zap the tree EH table.  */
   set_eh_throw_stmt_table (cfun, NULL);
Index: gcc/cfgcleanup.c
===================================================================
--- gcc/cfgcleanup.c	(revision 189835)
+++ gcc/cfgcleanup.c	(working copy)
@@ -481,13 +481,15 @@ 
 		  int new_locus = single_succ_edge (target)->goto_locus;
 		  int locus = goto_locus;

-		  if (new_locus && locus && !locator_eq (new_locus, locus))
+		  if (!IS_UNKNOWN_LOCATION (new_locus)
+		      && !IS_UNKNOWN_LOCATION (locus)
+		      && new_locus != locus)
 		    new_target = NULL;
 		  else
 		    {
 		      rtx last;

-		      if (new_locus)
+		      if (!IS_UNKNOWN_LOCATION (new_locus))
 			locus = new_locus;

 		      last = BB_END (target);
@@ -495,13 +497,15 @@ 
 			last = prev_nondebug_insn (last);

 		      new_locus = last && INSN_P (last)
-				  ? INSN_LOCATOR (last) : 0;
+				  ? INSN_LOCATION (last) : 0;

-		      if (new_locus && locus && !locator_eq (new_locus, locus))
+		      if (!IS_UNKNOWN_LOCATION (new_locus)
+			  && !IS_UNKNOWN_LOCATION (locus)
+			  && new_locus != locus)
 			new_target = NULL;
 		      else
 			{
-			  if (new_locus)
+			  if (!IS_UNKNOWN_LOCATION (new_locus))
 			    locus = new_locus;

 			  goto_locus = locus;
Index: gcc/tree-ssa-live.c
===================================================================
--- gcc/tree-ssa-live.c	(revision 189835)
+++ gcc/tree-ssa-live.c	(working copy)
@@ -587,7 +587,7 @@ 
    else
    /* Verfify that only blocks with source location set
       are entry points to the inlined functions.  */
-     gcc_assert (BLOCK_SOURCE_LOCATION (scope) == UNKNOWN_LOCATION);
+     gcc_assert (IS_UNKNOWN_LOCATION (BLOCK_SOURCE_LOCATION (scope)));

    TREE_USED (scope) = !unused;
    return unused;
@@ -615,7 +615,7 @@ 
   fprintf (file, "\n%*s{ Scope block #%i%s%s",indent, "" ,
BLOCK_NUMBER (scope),
   	   TREE_USED (scope) ? "" : " (unused)",
 	   BLOCK_ABSTRACT (scope) ? " (abstract)": "");
-  if (BLOCK_SOURCE_LOCATION (scope) != UNKNOWN_LOCATION)
+  if (!IS_UNKNOWN_LOCATION (BLOCK_SOURCE_LOCATION (scope)))
     {
       expanded_location s = expand_location (BLOCK_SOURCE_LOCATION (scope));
       fprintf (file, " %s:%i", s.file, s.line);
@@ -765,13 +765,18 @@ 
           FOR_EACH_PHI_ARG (arg_p, phi, i, SSA_OP_ALL_USES)
             {
 	      tree arg = USE_FROM_PTR (arg_p);
+	      int index = PHI_ARG_INDEX_FROM_USE (arg_p);
+	      tree block =
+		LOCATION_BLOCK (gimple_phi_arg_location (phi, index));
+	      if (block != NULL)
+		TREE_USED (block) = true;
 	      mark_all_vars_used (&arg, global_unused_vars);
             }
         }

       FOR_EACH_EDGE (e, ei, bb->succs)
 	if (e->goto_locus)
-	  TREE_USED (e->goto_block) = true;
+	  TREE_USED (LOCATION_BLOCK (e->goto_locus)) = true;
     }

   /* We do a two-pass approach about the out-of-scope clobbers.  We want
Index: gcc/lto/lto.c
===================================================================
--- gcc/lto/lto.c	(revision 189835)
+++ gcc/lto/lto.c	(working copy)
@@ -1603,7 +1603,6 @@ 
   else if (EXPR_P (t))
     {
       int i;
-      LTO_NO_PREVAIL (t->exp.block);
       for (i = TREE_OPERAND_LENGTH (t) - 1; i >= 0; --i)
 	LTO_SET_PREVAIL (TREE_OPERAND (t, i));
     }
Index: gcc/rtl.c
===================================================================
--- gcc/rtl.c	(revision 189835)
+++ gcc/rtl.c	(working copy)
@@ -440,7 +440,7 @@ 
 #ifndef GENERATOR_FILE
 	      if (((code == ASM_OPERANDS && i == 6)
 		   || (code == ASM_INPUT && i == 1))
-		  && locator_eq (XINT (x, i), XINT (y, i)))
+		  && XINT (x, i) == XINT (y, i))
 		break;
 #endif
 	      return 0;
@@ -579,7 +579,7 @@ 
 #ifndef GENERATOR_FILE
 	      if (((code == ASM_OPERANDS && i == 6)
 		   || (code == ASM_INPUT && i == 1))
-		  && locator_eq (XINT (x, i), XINT (y, i)))
+		  && XINT (x, i) == XINT (y, i))
 		break;
 #endif
 	      return 0;
Index: gcc/rtl.h
===================================================================
--- gcc/rtl.h	(revision 189835)
+++ gcc/rtl.h	(working copy)
@@ -739,6 +739,7 @@ 
 #endif

 #define XINT(RTX, N)	(RTL_CHECK2 (RTX, N, 'i', 'n').rt_int)
+#define XUINT(RTX, N)   (RTL_CHECK2 (RTX, N, 'i', 'n').rt_uint)
 #define XSTR(RTX, N)	(RTL_CHECK2 (RTX, N, 's', 'S').rt_str)
 #define XEXP(RTX, N)	(RTL_CHECK2 (RTX, N, 'e', 'u').rt_rtx)
 #define XVEC(RTX, N)	(RTL_CHECK2 (RTX, N, 'E', 'V').rt_rtvec)
@@ -802,13 +803,13 @@ 
 /* The body of an insn.  */
 #define PATTERN(INSN)	XEXP (INSN, 4)

-#define INSN_LOCATOR(INSN) XINT (INSN, 5)
+#define INSN_LOCATION(INSN) XUINT (INSN, 5)
+
+#define INSN_HAS_LOCATION(INSN) (!IS_UNKNOWN_LOCATION (INSN_LOCATION (INSN)))
+
 /* LOCATION of an RTX if relevant.  */
 #define RTL_LOCATION(X) (INSN_P (X) ? \
-			 locator_location (INSN_LOCATOR (X)) \
-			 : UNKNOWN_LOCATION)
-/* LOCATION of current INSN.  */
-#define CURR_INSN_LOCATION (locator_location (curr_insn_locator ()))
+			 INSN_LOCATION (X) : UNKNOWN_LOCATION)

 /* Code number of instruction, from when it was recognized.
    -1 means this instruction has not been recognized yet.  */
@@ -1807,12 +1808,8 @@ 
 /* In emit-rtl.c  */
 extern int insn_line (const_rtx);
 extern const char * insn_file (const_rtx);
-extern location_t locator_location (int);
-extern int locator_line (int);
-extern const char * locator_file (int);
-extern bool locator_eq (int, int);
-extern int prologue_locator, epilogue_locator;
 extern tree insn_scope (const_rtx);
+extern location_t prologue_location, epilogue_location;

 /* In jump.c */
 extern enum rtx_code reverse_condition (enum rtx_code);
@@ -2648,14 +2645,10 @@ 
 /* Keep this for the nonce.  */
 #define gen_lowpart rtl_hooks.gen_lowpart

-extern void insn_locators_alloc (void);
-extern void insn_locators_free (void);
-extern void insn_locators_finalize (void);
-extern void set_curr_insn_source_location (location_t);
-extern location_t get_curr_insn_source_location (void);
-extern void set_curr_insn_block (tree);
-extern tree get_curr_insn_block (void);
-extern int curr_insn_locator (void);
+extern void insn_locations_init (void);
+extern void insn_locations_finalize (void);
+extern void set_curr_insn_location (location_t);
+extern location_t curr_insn_location (void);
 extern bool optimize_insn_for_size_p (void);
 extern bool optimize_insn_for_speed_p (void);

Index: gcc/tree-inline.c
===================================================================
--- gcc/tree-inline.c	(revision 189835)
+++ gcc/tree-inline.c	(working copy)
@@ -852,10 +852,6 @@ 
       /* Otherwise, just copy the node.  Note that copy_tree_r already
 	 knows not to copy VAR_DECLs, etc., so this is safe.  */

-      /* We should never have TREE_BLOCK set on non-statements.  */
-      if (EXPR_P (*tp))
-	gcc_assert (!TREE_BLOCK (*tp));
-
       if (TREE_CODE (*tp) == MEM_REF)
 	{
 	  tree ptr = TREE_OPERAND (*tp, 0);
@@ -901,13 +897,9 @@ 
 	{
 	  /* Variable substitution need not be simple.  In particular,
 	     the MEM_REF substitution above.  Make sure that
-	     TREE_CONSTANT and friends are up-to-date.  But make sure
-	     to not improperly set TREE_BLOCK on some sub-expressions.  */
+	     TREE_CONSTANT and friends are up-to-date.  */
 	  int invariant = is_gimple_min_invariant (*tp);
-	  tree block = id->block;
-	  id->block = NULL_TREE;
 	  walk_tree (&TREE_OPERAND (*tp, 0), remap_gimple_op_r, data, NULL);
-	  id->block = block;
 	  recompute_tree_invariant_for_addr_expr (*tp);

 	  /* If this used to be invariant, but is not any longer,
@@ -919,6 +911,22 @@ 
 	}
     }

+  /* Update the TREE_BLOCK for the cloned expr.  */
+  if (EXPR_P (*tp))
+    {
+      tree new_block = id->remapping_type_depth == 0 ? id->block : NULL;
+      tree old_block = TREE_BLOCK (*tp);
+      if (old_block)
+	{
+	  tree *n;
+	  n = (tree *) pointer_map_contains (id->decl_map,
+					     TREE_BLOCK (*tp));
+	  if (n)
+	    new_block = *n;
+	}
+      TREE_SET_BLOCK (*tp, new_block);
+    }
+
   /* Keep iterating.  */
   return NULL_TREE;
 }
@@ -1144,11 +1152,10 @@ 
 	      tree *n;
 	      n = (tree *) pointer_map_contains (id->decl_map,
 						 TREE_BLOCK (*tp));
-	      gcc_assert (n || id->remapping_type_depth != 0);
 	      if (n)
 		new_block = *n;
 	    }
-	  TREE_BLOCK (*tp) = new_block;
+	  TREE_SET_BLOCK (*tp, new_block);
 	}

       if (TREE_CODE (*tp) != OMP_CLAUSE)
@@ -2020,6 +2027,7 @@ 
 	      tree new_arg;
 	      tree block = id->block;
 	      edge_iterator ei2;
+	      location_t locus;

 	      /* When doing partial cloning, we allow PHIs on the entry block
 		 as long as all the arguments are the same.  Find any input
@@ -2031,9 +2039,7 @@ 

 	      arg = PHI_ARG_DEF_FROM_EDGE (phi, old_edge);
 	      new_arg = arg;
-	      id->block = NULL_TREE;
 	      walk_tree (&new_arg, copy_tree_body_r, id, NULL);
-	      id->block = block;
 	      gcc_assert (new_arg);
 	      /* With return slot optimization we can end up with
 	         non-gimple (foo *)&this->m, fix that here.  */
@@ -2046,8 +2052,19 @@ 
 		  gsi_insert_seq_on_edge (new_edge, stmts);
 		  inserted = true;
 		}
+	      locus = gimple_phi_arg_location_from_edge (phi, old_edge);
+	      block = id->block;
+	      if (LOCATION_BLOCK (locus))
+		{
+		  tree *n;
+		  n = (tree *) pointer_map_contains (id->decl_map,
+			LOCATION_BLOCK (locus));
+		  gcc_assert (n);
+		  block = *n;
+		}
+
 	      add_phi_arg (new_phi, new_arg, new_edge,
-			   gimple_phi_arg_location_from_edge (phi, old_edge));
+			   COMBINE_LOCATION (locus, block));
 	    }
 	}
     }
@@ -3946,7 +3963,8 @@ 
   id->block = make_node (BLOCK);
   BLOCK_ABSTRACT_ORIGIN (id->block) = fn;
   BLOCK_SOURCE_LOCATION (id->block) = input_location;
-  prepend_lexical_block (gimple_block (stmt), id->block);
+  if (gimple_block (stmt))
+    prepend_lexical_block (gimple_block (stmt), id->block);

   /* Local declarations will be replaced by their equivalents in this
      map.  */
Index: gcc/tree-streamer-in.c
===================================================================
--- gcc/tree-streamer-in.c	(revision 189835)
+++ gcc/tree-streamer-in.c	(working copy)
@@ -776,7 +776,7 @@ 

   loc = lto_input_location (ib, data_in);
   SET_EXPR_LOCATION (expr, loc);
-  TREE_BLOCK (expr) = stream_read_tree (ib, data_in);
+  TREE_SET_BLOCK (expr, stream_read_tree (ib, data_in));
 }


Index: gcc/combine.c
===================================================================
--- gcc/combine.c	(revision 189835)
+++ gcc/combine.c	(working copy)
@@ -2896,7 +2896,7 @@ 

 	  i1 = gen_rtx_INSN (VOIDmode, INSN_UID (i2), NULL_RTX, i2,
 			     BLOCK_FOR_INSN (i2), XVECEXP (PATTERN (i2), 0, 1),
-			     INSN_LOCATOR (i2), -1, NULL_RTX);
+			     INSN_LOCATION (i2), -1, NULL_RTX);

 	  SUBST (PATTERN (i2), XVECEXP (PATTERN (i2), 0, 0));
 	  SUBST (XEXP (SET_SRC (PATTERN (i2)), 0),
Index: gcc/tree-outof-ssa.c
===================================================================
--- gcc/tree-outof-ssa.c	(revision 189835)
+++ gcc/tree-outof-ssa.c	(working copy)
@@ -108,8 +108,7 @@ 
 {
   if (e->goto_locus)
     {
-      set_curr_insn_source_location (e->goto_locus);
-      set_curr_insn_block (e->goto_block);
+      set_curr_insn_location (e->goto_locus);
     }
   else
     {
@@ -125,8 +124,7 @@ 
 		continue;
 	      if (gimple_has_location (stmt) || gimple_block (stmt))
 		{
-		  set_curr_insn_source_location (gimple_location (stmt));
-		  set_curr_insn_block (gimple_block (stmt));
+		  set_curr_insn_location (gimple_location (stmt));
 		  return;
 		}
 	    }
@@ -191,7 +189,7 @@ 
   set_location_for_edge (e);
   /* If a locus is provided, override the default.  */
   if (locus)
-    set_curr_insn_source_location (locus);
+    set_curr_insn_location (locus);

   var = partition_to_var (SA.map, src);
   seq = emit_partition_copy (SA.partition_to_pseudo[dest],
@@ -228,7 +226,7 @@ 
   set_location_for_edge (e);
   /* If a locus is provided, override the default.  */
   if (locus)
-    set_curr_insn_source_location (locus);
+    set_curr_insn_location (locus);

   start_sequence ();

@@ -284,7 +282,7 @@ 
   set_location_for_edge (e);
   /* If a locus is provided, override the default.  */
   if (locus)
-    set_curr_insn_source_location (locus);
+    set_curr_insn_location (locus);

   /* We give the destination as sizeexp in case src/dest are BLKmode
      mems.  Usually we give the source.  As we result from SSA names
@@ -320,7 +318,7 @@ 
   set_location_for_edge (e);
   /* If a locus is provided, override the default.  */
   if (locus)
-    set_curr_insn_source_location (locus);
+    set_curr_insn_location (locus);

   var = partition_to_var (SA.map, src);
   seq = emit_partition_copy (dest,
Index: gcc/basic-block.h
===================================================================
--- gcc/basic-block.h	(revision 189835)
+++ gcc/basic-block.h	(working copy)
@@ -47,8 +47,7 @@ 
   /* Auxiliary info specific to a pass.  */
   PTR GTY ((skip (""))) aux;

-  /* Location of any goto implicit in the edge and associated BLOCK.  */
-  tree goto_block;
+  /* Location of any goto implicit in the edge.  */
   location_t goto_locus;

   /* The index number corresponding to this edge in the edge vector
Index: gcc/gimple.h
===================================================================
--- gcc/gimple.h	(revision 189835)
+++ gcc/gimple.h	(working copy)
@@ -210,10 +210,6 @@ 
      and the prev pointer being the last.  */
   gimple next;
   gimple GTY((skip)) prev;
-
-  /* [ WORD 6 ]
-     Lexical block holding this statement.  */
-  tree block;
 };


@@ -1198,7 +1194,7 @@ 
 static inline tree
 gimple_block (const_gimple g)
 {
-  return g->gsbase.block;
+  return LOCATION_BLOCK (g->gsbase.location);
 }


@@ -1207,7 +1203,7 @@ 
 static inline void
 gimple_set_block (gimple g, tree block)
 {
-  g->gsbase.block = block;
+  g->gsbase.location = COMBINE_LOCATION (g->gsbase.location, block);
 }


@@ -1242,7 +1238,7 @@ 
 static inline bool
 gimple_has_location (const_gimple g)
 {
-  return gimple_location (g) != UNKNOWN_LOCATION;
+  return !IS_UNKNOWN_LOCATION (gimple_location (g));
 }


Index: gcc/tree-cfg.c
===================================================================
--- gcc/tree-cfg.c	(revision 189835)
+++ gcc/tree-cfg.c	(working copy)
@@ -808,15 +808,11 @@ 
   e = make_edge (bb, then_bb, EDGE_TRUE_VALUE);
   assign_discriminator (entry_locus, then_bb);
   e->goto_locus = gimple_location (then_stmt);
-  if (e->goto_locus)
-    e->goto_block = gimple_block (then_stmt);
   e = make_edge (bb, else_bb, EDGE_FALSE_VALUE);
   if (e)
     {
       assign_discriminator (entry_locus, else_bb);
       e->goto_locus = gimple_location (else_stmt);
-      if (e->goto_locus)
-	e->goto_block = gimple_block (else_stmt);
     }

   /* We do not need the labels anymore.  */
@@ -1026,8 +1022,6 @@ 
       edge e = make_edge (bb, label_bb, EDGE_FALLTHRU);
       e->goto_locus = gimple_location (goto_t);
       assign_discriminator (e->goto_locus, label_bb);
-      if (e->goto_locus)
-	e->goto_block = gimple_block (goto_t);
       gsi_remove (&last, true);
       return;
     }
@@ -1501,7 +1495,7 @@ 

   /* When not optimizing, don't merge if we'd lose goto_locus.  */
   if (!optimize
-      && single_succ_edge (a)->goto_locus != UNKNOWN_LOCATION)
+      && single_succ_edge (a)->goto_locus)
     {
       location_t goto_locus = single_succ_edge (a)->goto_locus;
       gimple_stmt_iterator prev, next;
@@ -5987,9 +5981,7 @@ 
   tree t = *tp;

   if (EXPR_P (t))
-    /* We should never have TREE_BLOCK set on non-statements.  */
-    gcc_assert (!TREE_BLOCK (t));
-
+    ;
   else if (DECL_P (t) || TREE_CODE (t) == SSA_NAME)
     {
       if (TREE_CODE (t) == SSA_NAME)
@@ -6294,12 +6286,12 @@ 
     }

   FOR_EACH_EDGE (e, ei, bb->succs)
-    if (e->goto_locus)
+    if (!IS_UNKNOWN_LOCATION (e->goto_locus))
       {
-	tree block = e->goto_block;
+	tree block = LOCATION_BLOCK (e->goto_locus);
 	if (d->orig_block == NULL_TREE
 	    || block == d->orig_block)
-	  e->goto_block = d->new_block;
+	  e->goto_locus = COMBINE_LOCATION (e->goto_locus, d->new_block);
 #ifdef ENABLE_CHECKING
 	else if (block != d->new_block)
 	  {
Index: gcc/config/alpha/alpha.c
===================================================================
--- gcc/config/alpha/alpha.c	(revision 189835)
+++ gcc/config/alpha/alpha.c	(working copy)
@@ -8352,7 +8352,6 @@ 
      instruction scheduling worth while.  Note that use_thunk calls
      assemble_start_function and assemble_end_function.  */
   insn = get_insns ();
-  insn_locators_alloc ();
   shorten_branches (insn);
   final_start_function (insn, file, 1);
   final (insn, file, 1);
Index: gcc/config/sparc/sparc.c
===================================================================
--- gcc/config/sparc/sparc.c	(revision 189835)
+++ gcc/config/sparc/sparc.c	(working copy)
@@ -10654,7 +10654,6 @@ 
      instruction scheduling worth while.  Note that use_thunk calls
      assemble_start_function and assemble_end_function.  */
   insn = get_insns ();
-  insn_locators_alloc ();
   shorten_branches (insn);
   final_start_function (insn, file, 1);
   final (insn, file, 1);
Index: gcc/config/i386/i386.c
===================================================================
--- gcc/config/i386/i386.c	(revision 189835)
+++ gcc/config/i386/i386.c	(working copy)
@@ -33063,7 +33063,6 @@ 
   /* Emit just enough of rest_of_compilation to get the insns emitted.
      Note that use_thunk calls assemble_start_function et al.  */
   tmp = get_insns ();
-  insn_locators_alloc ();
   shorten_branches (tmp);
   final_start_function (tmp, file, 1);
   final (tmp, file, 1);
Index: gcc/config/tilegx/tilegx.c
===================================================================
--- gcc/config/tilegx/tilegx.c	(revision 189835)
+++ gcc/config/tilegx/tilegx.c	(working copy)
@@ -4804,7 +4804,6 @@ 
      serial except for the tail call, so we're only wasting one cycle.
    */
   insn = get_insns ();
-  insn_locators_alloc ();
   shorten_branches (insn);
   final_start_function (insn, file, 1);
   final (insn, file, 1);
Index: gcc/config/sh/sh.c
===================================================================
--- gcc/config/sh/sh.c	(revision 189835)
+++ gcc/config/sh/sh.c	(working copy)
@@ -11979,7 +11979,6 @@ 
      the insns emitted.  Note that use_thunk calls
      assemble_start_function and assemble_end_function.  */

-  insn_locators_alloc ();
   insns = get_insns ();

   if (optimize > 0)
Index: gcc/config/ia64/ia64.c
===================================================================
--- gcc/config/ia64/ia64.c	(revision 189835)
+++ gcc/config/ia64/ia64.c	(working copy)
@@ -10848,7 +10848,6 @@ 
      instruction scheduling worth while.  Note that use_thunk calls
      assemble_start_function and assemble_end_function.  */

-  insn_locators_alloc ();
   emit_all_insn_group_barriers (NULL);
   insn = get_insns ();
   shorten_branches (insn);
Index: gcc/config/rs6000/rs6000.c
===================================================================
--- gcc/config/rs6000/rs6000.c	(revision 189835)
+++ gcc/config/rs6000/rs6000.c	(working copy)
@@ -21664,7 +21664,6 @@ 
      instruction scheduling worth while.  Note that use_thunk calls
      assemble_start_function and assemble_end_function.  */
   insn = get_insns ();
-  insn_locators_alloc ();
   shorten_branches (insn);
   final_start_function (insn, file, 1);
   final (insn, file, 1);
Index: gcc/config/score/score.c
===================================================================
--- gcc/config/score/score.c	(revision 189835)
+++ gcc/config/score/score.c	(working copy)
@@ -505,7 +505,6 @@ 
   /* Run just enough of rest_of_compilation.  This sequence was
      "borrowed" from alpha.c.  */
   insn = get_insns ();
-  insn_locators_alloc ();
   split_all_insns_noflow ();
   shorten_branches (insn);
   final_start_function (insn, file, 1);
Index: gcc/config/tilepro/tilepro.c
===================================================================
--- gcc/config/tilepro/tilepro.c	(revision 189835)
+++ gcc/config/tilepro/tilepro.c	(working copy)
@@ -4407,7 +4407,6 @@ 
      serial except for the tail call, so we're only wasting one cycle.
    */
   insn = get_insns ();
-  insn_locators_alloc ();
   shorten_branches (insn);
   final_start_function (insn, file, 1);
   final (insn, file, 1);
Index: gcc/config/mips/mips.c
===================================================================
--- gcc/config/mips/mips.c	(revision 189835)
+++ gcc/config/mips/mips.c	(working copy)
@@ -15637,7 +15637,6 @@ 
   /* Run just enough of rest_of_compilation.  This sequence was
      "borrowed" from alpha.c.  */
   insn = get_insns ();
-  insn_locators_alloc ();
   split_all_insns_noflow ();
   mips16_lay_out_constants ();
   shorten_branches (insn);
Index: gcc/cfgrtl.c
===================================================================
--- gcc/cfgrtl.c	(revision 189835)
+++ gcc/cfgrtl.c	(working copy)
@@ -720,19 +720,19 @@ 
 static bool
 unique_locus_on_edge_between_p (basic_block a, basic_block b)
 {
-  const int goto_locus = EDGE_SUCC (a, 0)->goto_locus;
+  const location_t goto_locus = EDGE_SUCC (a, 0)->goto_locus;
   rtx insn, end;

-  if (!goto_locus)
+  if (IS_UNKNOWN_LOCATION (goto_locus))
     return false;

   /* First scan block A backward.  */
   insn = BB_END (a);
   end = PREV_INSN (BB_HEAD (a));
-  while (insn != end && (!NONDEBUG_INSN_P (insn) || INSN_LOCATOR (insn) == 0))
+  while (insn != end && (!NONDEBUG_INSN_P (insn) || !INSN_HAS_LOCATION (insn)))
     insn = PREV_INSN (insn);

-  if (insn != end && locator_eq (INSN_LOCATOR (insn), goto_locus))
+  if (insn != end && INSN_LOCATION (insn) == goto_locus)
     return false;

   /* Then scan block B forward.  */
@@ -743,8 +743,8 @@ 
       while (insn != end && !NONDEBUG_INSN_P (insn))
 	insn = NEXT_INSN (insn);

-      if (insn != end && INSN_LOCATOR (insn) != 0
-	  && locator_eq (INSN_LOCATOR (insn), goto_locus))
+      if (insn != end && INSN_HAS_LOCATION (insn)
+	  && INSN_LOCATION (insn) == goto_locus)
 	return false;
     }

@@ -761,7 +761,7 @@ 
     return;

   BB_END (a) = emit_insn_after_noloc (gen_nop (), BB_END (a), a);
-  INSN_LOCATOR (BB_END (a)) = EDGE_SUCC (a, 0)->goto_locus;
+  INSN_LOCATION (BB_END (a)) = EDGE_SUCC (a, 0)->goto_locus;
 }

 /* Blocks A and B are to be merged into a single block A.  The insns
@@ -1478,7 +1478,7 @@ 
   else
     jump_block = e->src;

-  if (e->goto_locus && e->goto_block == NULL)
+  if (!IS_UNKNOWN_LOCATION (e->goto_locus))
     loc = e->goto_locus;
   else
     loc = 0;
@@ -3337,7 +3337,8 @@ 
         edge_iterator ei;

         FOR_EACH_EDGE (e, ei, bb->succs)
-	  if (e->goto_locus && !(e->flags & EDGE_ABNORMAL))
+	  if (!IS_UNKNOWN_LOCATION (e->goto_locus)
+	      && !(e->flags & EDGE_ABNORMAL))
 	    {
 	      edge e2;
 	      edge_iterator ei2;
@@ -3347,15 +3348,15 @@ 
 	      insn = BB_END (e->src);
 	      end = PREV_INSN (BB_HEAD (e->src));
 	      while (insn != end
-		     && (!NONDEBUG_INSN_P (insn) || INSN_LOCATOR (insn) == 0))
+		     && (!NONDEBUG_INSN_P (insn) || !INSN_HAS_LOCATION (insn)))
 		insn = PREV_INSN (insn);
 	      if (insn != end
-		  && locator_eq (INSN_LOCATOR (insn), (int) e->goto_locus))
+		  && INSN_LOCATION (insn) == e->goto_locus)
 		continue;
 	      if (simplejump_p (BB_END (e->src))
-		  && INSN_LOCATOR (BB_END (e->src)) == 0)
+		  && !INSN_HAS_LOCATION (BB_END (e->src)))
 		{
-		  INSN_LOCATOR (BB_END (e->src)) = e->goto_locus;
+		  INSN_LOCATION (BB_END (e->src)) = e->goto_locus;
 		  continue;
 		}
 	      dest = e->dest;
@@ -3371,24 +3372,24 @@ 
 		  end = NEXT_INSN (BB_END (dest));
 		  while (insn != end && !NONDEBUG_INSN_P (insn))
 		    insn = NEXT_INSN (insn);
-		  if (insn != end && INSN_LOCATOR (insn)
-		      && locator_eq (INSN_LOCATOR (insn), (int) e->goto_locus))
+		  if (insn != end && INSN_HAS_LOCATION (insn)
+		      && INSN_LOCATION (insn) == e->goto_locus)
 		    continue;
 		}
 	      nb = split_edge (e);
 	      if (!INSN_P (BB_END (nb)))
 		BB_END (nb) = emit_insn_after_noloc (gen_nop (), BB_END (nb),
 						     nb);
-	      INSN_LOCATOR (BB_END (nb)) = e->goto_locus;
+	      INSN_LOCATION (BB_END (nb)) = e->goto_locus;

 	      /* If there are other incoming edges to the destination block
 		 with the same goto locus, redirect them to the new block as
 		 well, this can prevent other such blocks from being created
 		 in subsequent iterations of the loop.  */
 	      for (ei2 = ei_start (dest->preds); (e2 = ei_safe_edge (ei2)); )
-		if (e2->goto_locus
+		if (!IS_UNKNOWN_LOCATION (e2->goto_locus)
 		    && !(e2->flags & (EDGE_ABNORMAL | EDGE_FALLTHRU))
-		    && locator_eq (e->goto_locus, e2->goto_locus))
+		    && e->goto_locus == e2->goto_locus)
 		  redirect_edge_and_branch (e2, nb);
 		else
 		  ei_next (&ei2);
@@ -4088,7 +4089,7 @@ 
     }

   /* If B was a forwarder block, propagate the locus on the edge.  */
-  if (forwarder_p && !EDGE_SUCC (b, 0)->goto_locus)
+  if (forwarder_p && IS_UNKNOWN_LOCATION (EDGE_SUCC (b, 0)->goto_locus))
     EDGE_SUCC (b, 0)->goto_locus = EDGE_SUCC (a, 0)->goto_locus;

   if (dump_file)
Index: gcc/stmt.c
===================================================================
--- gcc/stmt.c	(revision 189835)
+++ gcc/stmt.c	(working copy)
@@ -2397,7 +2397,7 @@ 
 		 then emit the code for one side at a time.  */

 	      tree test_label
-		= build_decl (CURR_INSN_LOCATION,
+		= build_decl (curr_insn_location (),
 			      LABEL_DECL, NULL_TREE, NULL_TREE);

 	      /* See if the value is on the right.  */
@@ -2521,7 +2521,7 @@ 
 	      /* Right hand node requires testing.
 		 Branch to a label where we will handle it later.  */

-	      test_label = build_decl (CURR_INSN_LOCATION,
+	      test_label = build_decl (curr_insn_location (),
 				       LABEL_DECL, NULL_TREE, NULL_TREE);
 	      emit_cmp_and_jump_insns (index,
 				       convert_modes
Index: libcpp/include/line-map.h
===================================================================
--- libcpp/include/line-map.h	(revision 189835)
+++ libcpp/include/line-map.h	(working copy)
@@ -89,7 +89,7 @@ 

 /* This is the highest possible source location encoded within an
    ordinary or macro map.  */
-#define MAX_SOURCE_LOCATION 0xFFFFFFFF
+#define MAX_SOURCE_LOCATION 0x7FFFFFFF

 struct cpp_hashnode;

@@ -408,6 +408,16 @@ 
 #define LINEMAPS_LAST_ALLOCATED_MACRO_MAP(SET) \
   LINEMAPS_LAST_ALLOCATED_MAP (SET, true)

+extern void location_block_init (void);
+extern void location_block_fini (void);
+extern source_location get_combine_location (source_location, void *);
+extern void *get_block_from_location (source_location);
+extern source_location get_locus_from_location (source_location);
+
+#define COMBINE_LOCATION(LOC, BLOCK) \
+  ((BLOCK) ? get_combine_location ((LOC), (BLOCK)) : (LOC))
+#define IS_COMBINED_LOCATION(LOC) (((LOC) & MAX_SOURCE_LOCATION) != (LOC))
+
 /* Initialize a line map set.  */
 extern void linemap_init (struct line_maps *);

@@ -594,6 +604,8 @@ 

   int column;

+  void *block;
+
   /* In a system header?. */
   bool sysp;
 } expanded_location;
Index: libcpp/line-map.c
===================================================================
--- libcpp/line-map.c	(revision 189835)
+++ libcpp/line-map.c	(working copy)
@@ -25,6 +25,7 @@ 
 #include "line-map.h"
 #include "cpplib.h"
 #include "internal.h"
+#include "hashtab.h"

 static void trace_include (const struct line_maps *, const struct line_map *);
 static const struct line_map * linemap_ordinary_map_lookup (struct line_maps *,
@@ -50,6 +51,121 @@ 
 extern unsigned num_expanded_macros_counter;
 extern unsigned num_macro_tokens_counter;

+struct location_block {
+  source_location locus;
+  void *block;
+};
+
+static htab_t location_block_htab;
+static source_location curr_combined_location;
+static struct location_block *location_blocks;
+static unsigned int allocated_location_blocks;
+
+/* Hash function for location_block hashtable.  */
+
+static hashval_t
+location_block_hash (const void *l)
+{
+  const struct location_block *lb = (const struct location_block *) l;
+  return (hashval_t) lb->locus + (size_t) &lb->block;
+}
+
+/* Compare function for location_block hashtable.  */
+
+static int
+location_block_eq (const void *l1, const void *l2)
+{
+  const struct location_block *lb1 = (const struct location_block *) l1;
+  const struct location_block *lb2 = (const struct location_block *) l2;
+  return lb1->locus == lb2->locus && lb1->block == lb2->block;
+}
+
+/* Update the hashtable when location_blocks is reallocated.  */
+
+static int
+location_block_update (void **slot, void *data)
+{
+  *((char **) slot) += ((char *) location_blocks - (char *) data);
+  return 1;
+}
+
+/* Combine LOCUS and BLOCK to a combined location.  */
+
+source_location
+get_combine_location (source_location locus, void *block)
+{
+  struct location_block lb;
+  struct location_block **slot;
+
+  linemap_assert (block);
+
+  if (IS_COMBINED_LOCATION (locus))
+    locus = location_blocks[locus & MAX_SOURCE_LOCATION].locus;
+  if (locus == 0 && block == NULL)
+    return 0;
+  lb.locus = locus;
+  lb.block = block;
+  slot = (struct location_block **)
+      htab_find_slot (location_block_htab, &lb, INSERT);
+  if (*slot == NULL)
+    {
+      *slot = location_blocks + curr_combined_location;
+      location_blocks[curr_combined_location] = lb;
+      if (++curr_combined_location >= allocated_location_blocks)
+	{
+	  char *orig_location_blocks = (char *) location_blocks;
+	  allocated_location_blocks *= 2;
+	  location_blocks = XRESIZEVEC (struct location_block,
+				 	location_blocks,
+					allocated_location_blocks);
+	  htab_traverse (location_block_htab, location_block_update,
+			 orig_location_blocks);
+	}
+    }
+  return ((*slot) - location_blocks) | 0x80000000;
+}
+
+/* Return the block for LOCATION.  */
+
+void *
+get_block_from_location (source_location location)
+{
+  linemap_assert (IS_COMBINED_LOCATION (location));
+  return location_blocks[location & MAX_SOURCE_LOCATION].block;
+}
+
+/* Return the locus for LOCATION.  */
+
+source_location
+get_locus_from_location (source_location location)
+{
+  linemap_assert (IS_COMBINED_LOCATION (location));
+  return location_blocks[location & MAX_SOURCE_LOCATION].locus;
+}
+
+/* Initialize the location_block structure.  */
+
+void
+location_block_init (void)
+{
+  location_block_htab = htab_create (100, location_block_hash,
+				     location_block_eq, NULL);
+  curr_combined_location = 0;
+  allocated_location_blocks = 100;
+  location_blocks = XNEWVEC (struct location_block,
+			     allocated_location_blocks);
+}
+
+/* Finalize the location_block structure.  */
+
+void
+location_block_fini (void)
+{
+  allocated_location_blocks = 0;
+  XDELETEVEC (location_blocks);
+  htab_delete (location_block_htab);
+}
+
 /* Initialize a line map set.  */

 void
@@ -509,6 +625,8 @@ 
 const struct line_map*
 linemap_lookup (struct line_maps *set, source_location line)
 {
+  if (IS_COMBINED_LOCATION (line))
+    line = location_blocks[line & MAX_SOURCE_LOCATION].locus;
   if (linemap_location_from_macro_expansion_p (set, line))
     return linemap_macro_map_lookup (set, line);
   return linemap_ordinary_map_lookup (set, line);
@@ -525,6 +643,9 @@ 
   unsigned int md, mn, mx;
   const struct line_map *cached, *result;

+  if (IS_COMBINED_LOCATION (line))
+    line = location_blocks[line & MAX_SOURCE_LOCATION].locus;
+
   if (set ==  NULL || line < RESERVED_LOCATION_COUNT)
     return NULL;

@@ -570,6 +691,9 @@ 
   unsigned int md, mn, mx;
   const struct line_map *cached, *result;

+  if (IS_COMBINED_LOCATION (line))
+    line = location_blocks[line & MAX_SOURCE_LOCATION].locus;
+
   linemap_assert (line >= LINEMAPS_MACRO_LOWEST_LOCATION (set));

   if (set ==  NULL)
@@ -648,6 +772,9 @@ 
 {
   unsigned token_no;

+  if (IS_COMBINED_LOCATION (location))
+    location = location_blocks[location & MAX_SOURCE_LOCATION].locus;
+
   linemap_assert (linemap_macro_expansion_map_p (map)
 		  && location >= MAP_START_LOCATION (map));
   linemap_assert (location >= RESERVED_LOCATION_COUNT);
@@ -672,6 +799,9 @@ 
 {
   unsigned token_no;

+  if (IS_COMBINED_LOCATION (location))
+    location = location_blocks[location & MAX_SOURCE_LOCATION].locus;
+
   linemap_assert (linemap_macro_expansion_map_p (map)
 		  && location >= MAP_START_LOCATION (map));
   linemap_assert (location >= RESERVED_LOCATION_COUNT);
@@ -696,6 +826,9 @@ 
 {
   const struct line_map *map = NULL;

+  if (IS_COMBINED_LOCATION (location))
+    location = location_blocks[location & MAX_SOURCE_LOCATION].locus;
+
   if (location < RESERVED_LOCATION_COUNT)
     return 0;

@@ -720,6 +853,9 @@ 
 {
   const struct line_map *map = NULL;

+  if (IS_COMBINED_LOCATION (location))
+    location = location_blocks[location & MAX_SOURCE_LOCATION].locus;
+
   if (location < RESERVED_LOCATION_COUNT)
     return NULL;

@@ -754,6 +890,9 @@ 
 {
   const struct line_map *map = NULL;

+  if (IS_COMBINED_LOCATION (location))
+    location = location_blocks[location & MAX_SOURCE_LOCATION].locus;
+
   if (location < RESERVED_LOCATION_COUNT)
     return false;

@@ -793,6 +932,9 @@ 
 linemap_location_from_macro_expansion_p (struct line_maps *set,
 					 source_location location)
 {
+  if (IS_COMBINED_LOCATION (location))
+    location = location_blocks[location & MAX_SOURCE_LOCATION].locus;
+
   linemap_assert (location <= MAX_SOURCE_LOCATION
 		  && (set->highest_location
 		      < LINEMAPS_MACRO_LOWEST_LOCATION (set)));
@@ -933,6 +1075,9 @@ 
 {
   struct line_map *map;

+  if (IS_COMBINED_LOCATION (location))
+    location = location_blocks[location & MAX_SOURCE_LOCATION].locus;
+
   linemap_assert (set && location >= RESERVED_LOCATION_COUNT);

   while (true)
@@ -967,6 +1112,9 @@ 
 {
   struct line_map *map;

+  if (IS_COMBINED_LOCATION (location))
+    location = location_blocks[location & MAX_SOURCE_LOCATION].locus;
+
   linemap_assert (set && location >= RESERVED_LOCATION_COUNT);

   while (true)
@@ -1005,6 +1153,9 @@ 
 {
   struct line_map *map;

+  if (IS_COMBINED_LOCATION (location))
+    location = location_blocks[location & MAX_SOURCE_LOCATION].locus;
+
   linemap_assert (set && location >= RESERVED_LOCATION_COUNT);

   while (true)
@@ -1074,6 +1225,9 @@ 
 			  enum location_resolution_kind lrk,
 			  const struct line_map **map)
 {
+  if (IS_COMBINED_LOCATION (loc))
+    loc = location_blocks[loc & MAX_SOURCE_LOCATION].locus;
+
   if (loc < RESERVED_LOCATION_COUNT)
     {
       /* A reserved location wasn't encoded in a map.  Let's return a
@@ -1121,6 +1275,9 @@ 
   source_location resolved_location;
   const struct line_map *resolved_map;

+  if (IS_COMBINED_LOCATION (loc))
+    loc = location_blocks[loc & MAX_SOURCE_LOCATION].locus;
+
   resolved_location =
     linemap_macro_map_loc_unwind_toward_spelling (*map, loc);
   resolved_map = linemap_lookup (set, resolved_location);
@@ -1157,6 +1314,9 @@ 
   source_location resolved_loc;
   const struct line_map *map0 = NULL, *map1 = NULL;

+  if (IS_COMBINED_LOCATION (loc))
+    loc = location_blocks[loc & MAX_SOURCE_LOCATION].locus;
+
   map0 = linemap_lookup (set, loc);
   if (!linemap_macro_expansion_map_p (map0))
     return loc;
@@ -1198,6 +1358,11 @@ 
   expanded_location xloc;

   memset (&xloc, 0, sizeof (xloc));
+  if (IS_COMBINED_LOCATION (loc))
+    {
+      loc = location_blocks[loc & MAX_SOURCE_LOCATION].locus;
+      xloc.block = location_blocks[loc & MAX_SOURCE_LOCATION].block;
+    }

   if (loc < RESERVED_LOCATION_COUNT)
     /* The location for this token wasn't generated from a line map.
@@ -1290,6 +1455,9 @@ 
   const char *path = "", *from = "";
   int l = -1, c = -1, s = -1, e = -1;

+  if (IS_COMBINED_LOCATION (loc))
+    loc = location_blocks[loc & MAX_SOURCE_LOCATION].locus;
+
   if (loc == 0)
     return;