===================================================================
@@ -125,9 +125,6 @@ static int last_linenum;
/* Last discriminator written to assembly. */
static int last_discriminator;
-/* Discriminator of current block. */
-static int discriminator;
-
/* Highest line number in current block. */
static int high_block_linenum;
@@ -137,9 +134,10 @@ static int high_function_linenum;
/* Filename of last NOTE. */
static const char *last_filename;
-/* Override filename and line number. */
+/* Override filename, line number, and discriminator. */
static const char *override_filename;
static int override_linenum;
+static int override_discriminator;
/* Whether to force emission of a line note before the next insn. */
static bool force_source_line = false;
@@ -1738,7 +1736,7 @@ final_start_function (rtx first, FILE *file,
last_filename = LOCATION_FILE (prologue_location);
last_linenum = LOCATION_LINE (prologue_location);
- last_discriminator = discriminator = 0;
+ last_discriminator = 0;
high_block_linenum = high_function_linenum = last_linenum;
@@ -2194,8 +2192,6 @@ final_scan_insn (rtx insn, FILE *file, int optimiz
if (targetm.asm_out.unwind_emit)
targetm.asm_out.unwind_emit (asm_out_file, insn);
- discriminator = NOTE_BASIC_BLOCK (insn)->discriminator;
-
break;
case NOTE_INSN_EH_REGION_BEG:
@@ -2288,6 +2284,8 @@ final_scan_insn (rtx insn, FILE *file, int optimiz
{
override_filename = LOCATION_FILE (*locus_ptr);
override_linenum = LOCATION_LINE (*locus_ptr);
+ override_discriminator =
+ get_discriminator_from_locus (*locus_ptr);
}
}
break;
@@ -2321,11 +2319,14 @@ final_scan_insn (rtx insn, FILE *file, int optimiz
{
override_filename = LOCATION_FILE (*locus_ptr);
override_linenum = LOCATION_LINE (*locus_ptr);
+ override_discriminator =
+ get_discriminator_from_locus (*locus_ptr);
}
else
{
override_filename = NULL;
override_linenum = 0;
+ override_discriminator = 0;
}
}
break;
@@ -3008,6 +3009,17 @@ final_scan_insn (rtx insn, FILE *file, int optimiz
}
return NEXT_INSN (insn);
}
+
+/* Return discriminator of the statement that produced this insn. */
+int
+insn_discriminator (const_rtx insn)
+{
+ location_t loc = INSN_LOCATION (insn);
+ if (!loc)
+ return 0;
+ return get_discriminator_from_locus (loc);
+}
+
/* Return whether a source line note needs to be emitted before INSN.
Sets IS_STMT to TRUE if the line should be marked as a possible
@@ -3018,16 +3030,19 @@ notice_source_line (rtx insn, bool *is_stmt)
{
const char *filename;
int linenum;
+ int discriminator;
if (override_filename)
{
filename = override_filename;
linenum = override_linenum;
+ discriminator = override_discriminator;
}
else
{
filename = insn_file (insn);
linenum = insn_line (insn);
+ discriminator = insn_discriminator (insn);
}
if (filename == NULL)
===================================================================
@@ -109,6 +109,11 @@ location_t input_location;
struct line_maps *line_table;
+static vec<location_t> discriminator_location_locations;
+static vec<int> discriminator_location_discriminators;
+static location_t next_discriminator_location = UNKNOWN_LOCATION;
+static location_t min_discriminator_location = UNKNOWN_LOCATION;
+
static fcache *fcache_tab;
static const size_t fcache_tab_size = 16;
static const size_t fcache_buffer_size = 4 * 1024;
@@ -143,6 +148,13 @@ expand_location_1 (source_location loc,
loc = LOCATION_LOCUS (loc);
}
+ /* If LOC describes a location with a discriminator, extract the
+ discriminator and map it to the real location. */
+ if (min_discriminator_location != UNKNOWN_LOCATION
+ && loc >= min_discriminator_location
+ && loc < next_discriminator_location)
+ loc = map_discriminator_location (loc);
+
memset (&xloc, 0, sizeof (xloc));
if (loc >= RESERVED_LOCATION_COUNT)
@@ -852,3 +864,84 @@ dump_line_table_statistics (void)
STAT_LABEL (total_used_map_size));
fprintf (stderr, "\n");
}
+
+/* Associate the DISCRIMINATOR with LOCUS, and return a new locus.
+ We associate discriminators with a locus by allocating location_t
+ values beyond those assigned by libcpp. Each new value is mapped
+ directly to a real location_t value, and separately to the
+ discriminator. */
+
+location_t
+location_with_discriminator (location_t locus, int discriminator)
+{
+ tree block = LOCATION_BLOCK (locus);
+ location_t ret;
+ int i;
+ locus = map_discriminator_location (locus);
+
+ if (locus == UNKNOWN_LOCATION)
+ return block ? COMBINE_LOCATION_DATA (line_table, locus, block)
+ : locus;
+
+ if (min_discriminator_location == UNKNOWN_LOCATION)
+ {
+ min_discriminator_location = line_table->highest_location + 1;
+ next_discriminator_location = min_discriminator_location;
+ }
+
+ /* Traverse the last few discriminator_locations to see if we can reuse
+ the entry. */
+ for (i = next_discriminator_location - min_discriminator_location - 1;
+ (i >= 0 && LOCATION_LINE (discriminator_location_locations[i]) ==
+ LOCATION_LINE (locus)
+ && discriminator_location_discriminators[i] == discriminator);
+ i--)
+ if (discriminator_location_locations[i] == locus)
+ return (block
+ ? COMBINE_LOCATION_DATA (line_table, min_discriminator_location + i,
+ block)
+ : min_discriminator_location + i);
+
+ discriminator_location_locations.safe_push(locus);
+ discriminator_location_discriminators.safe_push(discriminator);
+
+ ret = (block
+ ? COMBINE_LOCATION_DATA (line_table, next_discriminator_location, block)
+ : next_discriminator_location);
+
+ next_discriminator_location++;
+ return ret;
+}
+
+/* Return TRUE if LOCUS represents a location with a discriminator. */
+
+bool
+has_discriminator (location_t locus)
+{
+ locus = LOCATION_LOCUS (locus);
+ return (min_discriminator_location != UNKNOWN_LOCATION
+ && locus >= min_discriminator_location
+ && locus < next_discriminator_location);
+}
+
+/* Return the real location_t value for LOCUS. */
+
+location_t
+map_discriminator_location (location_t locus)
+{
+ locus = LOCATION_LOCUS (locus);
+ if (! has_discriminator (locus))
+ return locus;
+ return (location_t) discriminator_location_locations[locus - min_discriminator_location];
+}
+
+/* Return the discriminator for LOCUS. */
+
+int
+get_discriminator_from_locus (location_t locus)
+{
+ locus = LOCATION_LOCUS (locus);
+ if (! has_discriminator (locus))
+ return 0;
+ return discriminator_location_discriminators[locus - min_discriminator_location];
+}
===================================================================
@@ -48,6 +48,11 @@ typedef source_location location_t;
extern location_t input_location;
+extern location_t location_with_discriminator (location_t, int);
+extern bool has_discriminator (location_t);
+extern location_t map_discriminator_location (location_t);
+extern int get_discriminator_from_locus (location_t);
+
#define LOCATION_FILE(LOC) ((expand_location (LOC)).file)
#define LOCATION_LINE(LOC) ((expand_location (LOC)).line)
#define LOCATION_COLUMN(LOC)((expand_location (LOC)).column)
@@ -59,7 +64,8 @@ extern location_t input_location;
: NULL))
#define in_system_header_at(LOC) \
- ((linemap_location_in_system_header_p (line_table, LOC)))
+ ((linemap_location_in_system_header_p (line_table, \
+ map_discriminator_location (LOC))))
void dump_line_table_statistics (void);
===================================================================
@@ -201,11 +201,6 @@ struct GTY((chain_next ("%h.next_bb"), chain_prev
/* Expected frequency. Normalized to be in range 0 to BB_FREQ_MAX. */
int frequency;
-
- /* The discriminator for this block. The discriminator distinguishes
- among several basic blocks that share a common locus, allowing for
- more accurate sample-based profiling. */
- int discriminator;
};
/* This ensures that struct gimple_bb_info is smaller than
===================================================================
@@ -30,6 +30,7 @@ along with GCC; see the file COPYING3. If not see
#include "tm_p.h"
#include "basic-block.h"
#include "flags.h"
+#include "input.h"
#include "function.h"
#include "gimple-pretty-print.h"
#include "pointer-set.h"
@@ -959,6 +960,32 @@ same_line_p (location_t locus1, location_t locus2)
&& filename_cmp (from.file, to.file) == 0);
}
+/* Assign a unique discriminator value to instructions in block BB that
+ have the same LOCUS as its predecessor block. */
+
+static void
+assign_discriminator (location_t locus, basic_block bb)
+{
+ gimple_stmt_iterator gsi;
+ int discriminator;
+
+ locus = map_discriminator_location (locus);
+
+ if (locus == UNKNOWN_LOCATION)
+ return;
+
+ discriminator = next_discriminator_for_locus (locus);
+
+ for (gsi = gsi_start_bb (bb); !gsi_end_p (gsi); gsi_next (&gsi))
+ {
+ gimple stmt = gsi_stmt (gsi);
+ location_t stmt_locus = gimple_location (stmt);
+ if (same_line_p (locus, stmt_locus))
+ gimple_set_location (stmt,
+ location_with_discriminator (stmt_locus, discriminator));
+ }
+}
+
/* Assign discriminators to each basic block. */
static void
@@ -970,9 +997,37 @@ assign_discriminators (void)
{
edge e;
edge_iterator ei;
+ gimple_stmt_iterator gsi;
gimple last = last_stmt (bb);
location_t locus = last ? gimple_location (last) : UNKNOWN_LOCATION;
+ location_t curr_locus = UNKNOWN_LOCATION;
+ int curr_discr = 0;
+ /* Traverse the basic block, if two function calls within a basic block
+ are mapped to a same line, assign a new discriminator because a call
+ stmt could be a split point of a basic block. */
+ for (gsi = gsi_start_bb (bb); !gsi_end_p (gsi); gsi_next (&gsi))
+ {
+ gimple stmt = gsi_stmt (gsi);
+ if (curr_locus == UNKNOWN_LOCATION)
+ {
+ curr_locus = gimple_location (stmt);
+ }
+ else if (!same_line_p (curr_locus, gimple_location (stmt)))
+ {
+ curr_locus = gimple_location (stmt);
+ curr_discr = 0;
+ }
+ else if (curr_discr != 0)
+ {
+ gimple_set_location (stmt, location_with_discriminator (
+ gimple_location (stmt), curr_discr));
+ }
+ /* Allocate a new discriminator for CALL stmt. */
+ if (gimple_code (stmt) == GIMPLE_CALL)
+ curr_discr = next_discriminator_for_locus (curr_locus);
+ }
+
if (locus == UNKNOWN_LOCATION)
continue;
@@ -983,10 +1038,12 @@ assign_discriminators (void)
if ((first && same_line_p (locus, gimple_location (first)))
|| (last && same_line_p (locus, gimple_location (last))))
{
- if (e->dest->discriminator != 0 && bb->discriminator == 0)
- bb->discriminator = next_discriminator_for_locus (locus);
+ if (((first && has_discriminator (gimple_location (first)))
+ || (last && has_discriminator (gimple_location (last))))
+ && !has_discriminator (locus))
+ assign_discriminator (locus, bb);
else
- e->dest->discriminator = next_discriminator_for_locus (locus);
+ assign_discriminator (locus, e->dest);
}
}
}
===================================================================
@@ -500,7 +500,6 @@ split_block (basic_block bb, void *i)
new_bb->count = bb->count;
new_bb->frequency = bb->frequency;
- new_bb->discriminator = bb->discriminator;
if (dom_info_available_p (CDI_DOMINATORS))
{
===================================================================
@@ -668,6 +668,7 @@ static void
dump_location (pretty_printer *buffer, location_t loc)
{
expanded_location xloc = expand_location (loc);
+ int discriminator = get_discriminator_from_locus (loc);
pp_left_bracket (buffer);
if (xloc.file)
@@ -676,6 +677,11 @@ dump_location (pretty_printer *buffer, location_t
pp_string (buffer, " : ");
}
pp_decimal_int (buffer, xloc.line);
+ if (discriminator)
+ {
+ pp_string (buffer, " discrim ");
+ pp_decimal_int (buffer, discriminator);
+ }
pp_string (buffer, "] ");
}
===================================================================
@@ -1920,6 +1920,7 @@ extern rtx prev_cc0_setter (rtx);
extern int insn_line (const_rtx);
extern const char * insn_file (const_rtx);
extern tree insn_scope (const_rtx);
+extern int insn_discriminator (const_rtx);
extern location_t prologue_location, epilogue_location;
/* In jump.c */
===================================================================
@@ -410,8 +410,13 @@ print_rtx (const_rtx in_rtx)
redundant with line number information and do not print anything
when there is no location information available. */
if (INSN_LOCATION (in_rtx) && insn_file (in_rtx))
- fprintf (outfile, " %s:%i", insn_file (in_rtx),
- insn_line (in_rtx));
+ {
+ int discriminator = insn_discriminator (in_rtx);
+ fprintf (outfile, " %s:%i", insn_file (in_rtx),
+ insn_line (in_rtx));
+ if (discriminator)
+ fprintf (outfile, " discrim %d", discriminator);
+ }
#endif
}
else if (i == 6 && GET_CODE (in_rtx) == ASM_OPERANDS)
===================================================================
@@ -2057,7 +2057,9 @@ pp_gimple_stmt_1 (pretty_printer *buffer, gimple g
if ((flags & TDF_LINENO) && gimple_has_location (gs))
{
- expanded_location xloc = expand_location (gimple_location (gs));
+ location_t loc = gimple_location (gs);
+ expanded_location xloc = expand_location (loc);
+ int discriminator = get_discriminator_from_locus (loc);
pp_left_bracket (buffer);
if (xloc.file)
{
@@ -2067,6 +2069,11 @@ pp_gimple_stmt_1 (pretty_printer *buffer, gimple g
pp_decimal_int (buffer, xloc.line);
pp_colon (buffer);
pp_decimal_int (buffer, xloc.column);
+ if (discriminator)
+ {
+ pp_string (buffer, " discrim ");
+ pp_decimal_int (buffer, discriminator);
+ }
pp_string (buffer, "] ");
}
@@ -2268,8 +2275,6 @@ dump_gimple_bb_header (FILE *outf, basic_block bb,
indent, "", get_lineno (gsi_stmt (gsi)));
break;
}
- if (bb->discriminator)
- fprintf (outf, ", discriminator %i", bb->discriminator);
fputc ('\n', outf);
}
}