===================================================================
@@ -1214,78 +1214,6 @@ bailout:
}
-/* GSI_P points to a statement which performs a narrowing integral
- conversion.
-
- Look for cases like:
-
- t = x & c;
- y = (T) t;
-
- Turn them into:
-
- t = x & c;
- y = (T) x;
-
- If T is narrower than X's type and C merely masks off bits outside
- of (T) and nothing else.
-
- Normally we'd let DCE remove the dead statement. But no DCE runs
- after the last forwprop/combine pass, so we remove the obviously
- dead code ourselves.
-
- Return TRUE if a change was made, FALSE otherwise. */
-
-static bool
-simplify_conversion_from_bitmask (gimple_stmt_iterator *gsi_p)
-{
- gimple stmt = gsi_stmt (*gsi_p);
- gimple rhs_def_stmt = SSA_NAME_DEF_STMT (gimple_assign_rhs1 (stmt));
-
- /* See if the input for the conversion was set via a BIT_AND_EXPR and
- the only use of the BIT_AND_EXPR result is the conversion. */
- if (is_gimple_assign (rhs_def_stmt)
- && gimple_assign_rhs_code (rhs_def_stmt) == BIT_AND_EXPR
- && has_single_use (gimple_assign_lhs (rhs_def_stmt)))
- {
- tree rhs_def_operand1 = gimple_assign_rhs1 (rhs_def_stmt);
- tree rhs_def_operand2 = gimple_assign_rhs2 (rhs_def_stmt);
- tree lhs_type = TREE_TYPE (gimple_assign_lhs (stmt));
-
- /* Now verify suitability of the BIT_AND_EXPR's operands.
- The first must be an SSA_NAME that we can propagate and the
- second must be an integer constant that masks out all the
- bits outside the final result's type, but nothing else. */
- if (TREE_CODE (rhs_def_operand1) == SSA_NAME
- && ! SSA_NAME_OCCURS_IN_ABNORMAL_PHI (rhs_def_operand1)
- && TREE_CODE (rhs_def_operand2) == INTEGER_CST
- && operand_equal_p (rhs_def_operand2,
- build_low_bits_mask (TREE_TYPE (rhs_def_operand2),
- TYPE_PRECISION (lhs_type)),
- 0))
- {
- /* This is an optimizable case. Replace the source operand
- in the conversion with the first source operand of the
- BIT_AND_EXPR. */
- gimple_assign_set_rhs1 (stmt, rhs_def_operand1);
- stmt = gsi_stmt (*gsi_p);
- update_stmt (stmt);
-
- /* There is no DCE after the last forwprop pass. It's
- easy to clean up the first order effects here. */
- gimple_stmt_iterator si;
- si = gsi_for_stmt (rhs_def_stmt);
- gsi_remove (&si, true);
- fwprop_invalidate_lattice (gimple_get_lhs (rhs_def_stmt));
- release_defs (rhs_def_stmt);
- return true;
- }
- }
-
- return false;
-}
-
-
/* Helper function for simplify_gimple_switch. Remove case labels that
have values outside the range of the new type. */
@@ -1992,467 +1920,6 @@ simplify_rotate (gimple_stmt_iterator *g
return true;
}
-/* Perform re-associations of the plus or minus statement STMT that are
- always permitted. Returns true if the CFG was changed. */
-
-static bool
-associate_plusminus (gimple_stmt_iterator *gsi)
-{
- gimple stmt = gsi_stmt (*gsi);
- tree rhs1 = gimple_assign_rhs1 (stmt);
- tree rhs2 = gimple_assign_rhs2 (stmt);
- enum tree_code code = gimple_assign_rhs_code (stmt);
- bool changed;
-
- /* We can't reassociate at all for saturating types. */
- if (TYPE_SATURATING (TREE_TYPE (rhs1)))
- return false;
-
- /* First contract negates. */
- do
- {
- changed = false;
-
- /* A +- (-B) -> A -+ B. */
- if (TREE_CODE (rhs2) == SSA_NAME)
- {
- gimple def_stmt = SSA_NAME_DEF_STMT (rhs2);
- if (is_gimple_assign (def_stmt)
- && gimple_assign_rhs_code (def_stmt) == NEGATE_EXPR
- && can_propagate_from (def_stmt))
- {
- code = (code == MINUS_EXPR) ? PLUS_EXPR : MINUS_EXPR;
- gimple_assign_set_rhs_code (stmt, code);
- rhs2 = gimple_assign_rhs1 (def_stmt);
- gimple_assign_set_rhs2 (stmt, rhs2);
- gimple_set_modified (stmt, true);
- changed = true;
- }
- }
-
- /* (-A) + B -> B - A. */
- if (TREE_CODE (rhs1) == SSA_NAME
- && code == PLUS_EXPR)
- {
- gimple def_stmt = SSA_NAME_DEF_STMT (rhs1);
- if (is_gimple_assign (def_stmt)
- && gimple_assign_rhs_code (def_stmt) == NEGATE_EXPR
- && can_propagate_from (def_stmt))
- {
- code = MINUS_EXPR;
- gimple_assign_set_rhs_code (stmt, code);
- rhs1 = rhs2;
- gimple_assign_set_rhs1 (stmt, rhs1);
- rhs2 = gimple_assign_rhs1 (def_stmt);
- gimple_assign_set_rhs2 (stmt, rhs2);
- gimple_set_modified (stmt, true);
- changed = true;
- }
- }
- }
- while (changed);
-
- /* We can't reassociate floating-point or fixed-point plus or minus
- because of saturation to +-Inf. */
- if (FLOAT_TYPE_P (TREE_TYPE (rhs1))
- || FIXED_POINT_TYPE_P (TREE_TYPE (rhs1)))
- goto out;
-
- /* Second match patterns that allow contracting a plus-minus pair
- irrespective of overflow issues.
-
- (A +- B) - A -> +- B
- (A +- B) -+ B -> A
- (CST +- A) +- CST -> CST +- A
- (A +- CST) +- CST -> A +- CST
- ~A + A -> -1
- ~A + 1 -> -A
- A - (A +- B) -> -+ B
- A +- (B +- A) -> +- B
- CST +- (CST +- A) -> CST +- A
- CST +- (A +- CST) -> CST +- A
- A + ~A -> -1
- (T)(P + A) - (T)P -> (T)A
-
- via commutating the addition and contracting operations to zero
- by reassociation. */
-
- if (TREE_CODE (rhs1) == SSA_NAME)
- {
- gimple def_stmt = SSA_NAME_DEF_STMT (rhs1);
- if (is_gimple_assign (def_stmt) && can_propagate_from (def_stmt))
- {
- enum tree_code def_code = gimple_assign_rhs_code (def_stmt);
- if (def_code == PLUS_EXPR
- || def_code == MINUS_EXPR)
- {
- tree def_rhs1 = gimple_assign_rhs1 (def_stmt);
- tree def_rhs2 = gimple_assign_rhs2 (def_stmt);
- if (operand_equal_p (def_rhs1, rhs2, 0)
- && code == MINUS_EXPR)
- {
- /* (A +- B) - A -> +- B. */
- code = ((def_code == PLUS_EXPR)
- ? TREE_CODE (def_rhs2) : NEGATE_EXPR);
- rhs1 = def_rhs2;
- rhs2 = NULL_TREE;
- gimple_assign_set_rhs_with_ops (gsi, code, rhs1, NULL_TREE);
- gcc_assert (gsi_stmt (*gsi) == stmt);
- gimple_set_modified (stmt, true);
- }
- else if (operand_equal_p (def_rhs2, rhs2, 0)
- && code != def_code)
- {
- /* (A +- B) -+ B -> A. */
- code = TREE_CODE (def_rhs1);
- rhs1 = def_rhs1;
- rhs2 = NULL_TREE;
- gimple_assign_set_rhs_with_ops (gsi, code, rhs1, NULL_TREE);
- gcc_assert (gsi_stmt (*gsi) == stmt);
- gimple_set_modified (stmt, true);
- }
- else if (CONSTANT_CLASS_P (rhs2)
- && CONSTANT_CLASS_P (def_rhs1))
- {
- /* (CST +- A) +- CST -> CST +- A. */
- tree cst = fold_binary (code, TREE_TYPE (rhs1),
- def_rhs1, rhs2);
- if (cst && !TREE_OVERFLOW (cst))
- {
- code = def_code;
- gimple_assign_set_rhs_code (stmt, code);
- rhs1 = cst;
- gimple_assign_set_rhs1 (stmt, rhs1);
- rhs2 = def_rhs2;
- gimple_assign_set_rhs2 (stmt, rhs2);
- gimple_set_modified (stmt, true);
- }
- }
- else if (CONSTANT_CLASS_P (rhs2)
- && CONSTANT_CLASS_P (def_rhs2))
- {
- /* (A +- CST) +- CST -> A +- CST. */
- enum tree_code mix = (code == def_code)
- ? PLUS_EXPR : MINUS_EXPR;
- tree cst = fold_binary (mix, TREE_TYPE (rhs1),
- def_rhs2, rhs2);
- if (cst && !TREE_OVERFLOW (cst))
- {
- code = def_code;
- gimple_assign_set_rhs_code (stmt, code);
- rhs1 = def_rhs1;
- gimple_assign_set_rhs1 (stmt, rhs1);
- rhs2 = cst;
- gimple_assign_set_rhs2 (stmt, rhs2);
- gimple_set_modified (stmt, true);
- }
- }
- }
- else if (def_code == BIT_NOT_EXPR && code == PLUS_EXPR)
- {
- tree def_rhs1 = gimple_assign_rhs1 (def_stmt);
- if (operand_equal_p (def_rhs1, rhs2, 0))
- {
- /* ~A + A -> -1. */
- rhs1 = build_all_ones_cst (TREE_TYPE (rhs2));
- rhs2 = NULL_TREE;
- code = TREE_CODE (rhs1);
- gimple_assign_set_rhs_with_ops (gsi, code, rhs1, NULL_TREE);
- gcc_assert (gsi_stmt (*gsi) == stmt);
- gimple_set_modified (stmt, true);
- }
- else if ((TREE_CODE (TREE_TYPE (rhs2)) != COMPLEX_TYPE
- && integer_onep (rhs2))
- || (TREE_CODE (rhs2) == COMPLEX_CST
- && integer_onep (TREE_REALPART (rhs2))
- && integer_onep (TREE_IMAGPART (rhs2))))
- {
- /* ~A + 1 -> -A. */
- code = NEGATE_EXPR;
- rhs1 = def_rhs1;
- rhs2 = NULL_TREE;
- gimple_assign_set_rhs_with_ops (gsi, code, rhs1, NULL_TREE);
- gcc_assert (gsi_stmt (*gsi) == stmt);
- gimple_set_modified (stmt, true);
- }
- }
- else if (code == MINUS_EXPR
- && CONVERT_EXPR_CODE_P (def_code)
- && TREE_CODE (gimple_assign_rhs1 (def_stmt)) == SSA_NAME
- && TREE_CODE (rhs2) == SSA_NAME)
- {
- /* (T)(P + A) - (T)P -> (T)A. */
- gimple def_stmt2 = SSA_NAME_DEF_STMT (rhs2);
- if (is_gimple_assign (def_stmt2)
- && can_propagate_from (def_stmt2)
- && CONVERT_EXPR_CODE_P (gimple_assign_rhs_code (def_stmt2))
- && TREE_CODE (gimple_assign_rhs1 (def_stmt2)) == SSA_NAME)
- {
- /* Now we have (T)X - (T)P. */
- tree p = gimple_assign_rhs1 (def_stmt2);
- def_stmt2 = SSA_NAME_DEF_STMT (gimple_assign_rhs1 (def_stmt));
- if (is_gimple_assign (def_stmt2)
- && can_propagate_from (def_stmt2)
- && (gimple_assign_rhs_code (def_stmt2) == POINTER_PLUS_EXPR
- || gimple_assign_rhs_code (def_stmt2) == PLUS_EXPR)
- && gimple_assign_rhs1 (def_stmt2) == p)
- {
- /* And finally (T)(P + A) - (T)P. */
- tree a = gimple_assign_rhs2 (def_stmt2);
- if (TYPE_PRECISION (TREE_TYPE (rhs1))
- <= TYPE_PRECISION (TREE_TYPE (a))
- /* For integer types, if A has a smaller type
- than T the result depends on the possible
- overflow in P + A.
- E.g. T=size_t, A=(unsigned)429497295, P>0.
- However, if an overflow in P + A would cause
- undefined behavior, we can assume that there
- is no overflow. */
- || (INTEGRAL_TYPE_P (TREE_TYPE (p))
- && TYPE_OVERFLOW_UNDEFINED (TREE_TYPE (p)))
- /* For pointer types, if the conversion of A to the
- final type requires a sign- or zero-extension,
- then we have to punt - it is not defined which
- one is correct. */
- || (POINTER_TYPE_P (TREE_TYPE (p))
- && TREE_CODE (a) == INTEGER_CST
- && tree_int_cst_sign_bit (a) == 0))
- {
- if (issue_strict_overflow_warning
- (WARN_STRICT_OVERFLOW_MISC)
- && TYPE_PRECISION (TREE_TYPE (rhs1))
- > TYPE_PRECISION (TREE_TYPE (a))
- && INTEGRAL_TYPE_P (TREE_TYPE (p)))
- warning_at (gimple_location (stmt),
- OPT_Wstrict_overflow,
- "assuming signed overflow does not "
- "occur when assuming that "
- "(T)(P + A) - (T)P is always (T)A");
- if (useless_type_conversion_p (TREE_TYPE (rhs1),
- TREE_TYPE (a)))
- code = TREE_CODE (a);
- else
- code = NOP_EXPR;
- rhs1 = a;
- rhs2 = NULL_TREE;
- gimple_assign_set_rhs_with_ops (gsi, code, rhs1,
- rhs2);
- gcc_assert (gsi_stmt (*gsi) == stmt);
- gimple_set_modified (stmt, true);
- }
- }
- }
- }
- }
- }
-
- if (rhs2 && TREE_CODE (rhs2) == SSA_NAME)
- {
- gimple def_stmt = SSA_NAME_DEF_STMT (rhs2);
- if (is_gimple_assign (def_stmt) && can_propagate_from (def_stmt))
- {
- enum tree_code def_code = gimple_assign_rhs_code (def_stmt);
- if (def_code == PLUS_EXPR
- || def_code == MINUS_EXPR)
- {
- tree def_rhs1 = gimple_assign_rhs1 (def_stmt);
- tree def_rhs2 = gimple_assign_rhs2 (def_stmt);
- if (operand_equal_p (def_rhs1, rhs1, 0)
- && code == MINUS_EXPR)
- {
- /* A - (A +- B) -> -+ B. */
- code = ((def_code == PLUS_EXPR)
- ? NEGATE_EXPR : TREE_CODE (def_rhs2));
- rhs1 = def_rhs2;
- rhs2 = NULL_TREE;
- gimple_assign_set_rhs_with_ops (gsi, code, rhs1, NULL_TREE);
- gcc_assert (gsi_stmt (*gsi) == stmt);
- gimple_set_modified (stmt, true);
- }
- else if (operand_equal_p (def_rhs2, rhs1, 0)
- && code != def_code)
- {
- /* A +- (B +- A) -> +- B. */
- code = ((code == PLUS_EXPR)
- ? TREE_CODE (def_rhs1) : NEGATE_EXPR);
- rhs1 = def_rhs1;
- rhs2 = NULL_TREE;
- gimple_assign_set_rhs_with_ops (gsi, code, rhs1, NULL_TREE);
- gcc_assert (gsi_stmt (*gsi) == stmt);
- gimple_set_modified (stmt, true);
- }
- else if (CONSTANT_CLASS_P (rhs1)
- && CONSTANT_CLASS_P (def_rhs1))
- {
- /* CST +- (CST +- A) -> CST +- A. */
- tree cst = fold_binary (code, TREE_TYPE (rhs2),
- rhs1, def_rhs1);
- if (cst && !TREE_OVERFLOW (cst))
- {
- code = (code == def_code ? PLUS_EXPR : MINUS_EXPR);
- gimple_assign_set_rhs_code (stmt, code);
- rhs1 = cst;
- gimple_assign_set_rhs1 (stmt, rhs1);
- rhs2 = def_rhs2;
- gimple_assign_set_rhs2 (stmt, rhs2);
- gimple_set_modified (stmt, true);
- }
- }
- else if (CONSTANT_CLASS_P (rhs1)
- && CONSTANT_CLASS_P (def_rhs2))
- {
- /* CST +- (A +- CST) -> CST +- A. */
- tree cst = fold_binary (def_code == code
- ? PLUS_EXPR : MINUS_EXPR,
- TREE_TYPE (rhs2),
- rhs1, def_rhs2);
- if (cst && !TREE_OVERFLOW (cst))
- {
- rhs1 = cst;
- gimple_assign_set_rhs1 (stmt, rhs1);
- rhs2 = def_rhs1;
- gimple_assign_set_rhs2 (stmt, rhs2);
- gimple_set_modified (stmt, true);
- }
- }
- }
- else if (def_code == BIT_NOT_EXPR)
- {
- tree def_rhs1 = gimple_assign_rhs1 (def_stmt);
- if (code == PLUS_EXPR
- && operand_equal_p (def_rhs1, rhs1, 0))
- {
- /* A + ~A -> -1. */
- rhs1 = build_all_ones_cst (TREE_TYPE (rhs1));
- rhs2 = NULL_TREE;
- code = TREE_CODE (rhs1);
- gimple_assign_set_rhs_with_ops (gsi, code, rhs1, NULL_TREE);
- gcc_assert (gsi_stmt (*gsi) == stmt);
- gimple_set_modified (stmt, true);
- }
- }
- }
- }
-
-out:
- if (gimple_modified_p (stmt))
- {
- fold_stmt_inplace (gsi);
- update_stmt (stmt);
- return true;
- }
-
- return false;
-}
-
-/* Combine two conversions in a row for the second conversion at *GSI.
- Returns 1 if there were any changes made, 2 if cfg-cleanup needs to
- run. Else it returns 0. */
-
-static int
-combine_conversions (gimple_stmt_iterator *gsi)
-{
- gimple stmt = gsi_stmt (*gsi);
- gimple def_stmt;
- tree op0, lhs;
- enum tree_code code = gimple_assign_rhs_code (stmt);
- enum tree_code code2;
-
- gcc_checking_assert (CONVERT_EXPR_CODE_P (code)
- || code == FLOAT_EXPR
- || code == FIX_TRUNC_EXPR);
-
- lhs = gimple_assign_lhs (stmt);
- op0 = gimple_assign_rhs1 (stmt);
- if (useless_type_conversion_p (TREE_TYPE (lhs), TREE_TYPE (op0)))
- {
- gimple_assign_set_rhs_code (stmt, TREE_CODE (op0));
- return 1;
- }
-
- if (TREE_CODE (op0) != SSA_NAME)
- return 0;
-
- def_stmt = SSA_NAME_DEF_STMT (op0);
- if (!is_gimple_assign (def_stmt))
- return 0;
-
- code2 = gimple_assign_rhs_code (def_stmt);
-
- if (CONVERT_EXPR_CODE_P (code2) || code2 == FLOAT_EXPR)
- {
- tree defop0 = gimple_assign_rhs1 (def_stmt);
- tree type = TREE_TYPE (lhs);
- tree inside_type = TREE_TYPE (defop0);
- tree inter_type = TREE_TYPE (op0);
- int inside_int = INTEGRAL_TYPE_P (inside_type);
- unsigned int inside_prec = TYPE_PRECISION (inside_type);
- int inside_unsignedp = TYPE_UNSIGNED (inside_type);
- int inter_int = INTEGRAL_TYPE_P (inter_type);
- int inter_float = FLOAT_TYPE_P (inter_type);
- unsigned int inter_prec = TYPE_PRECISION (inter_type);
- int inter_unsignedp = TYPE_UNSIGNED (inter_type);
- int final_int = INTEGRAL_TYPE_P (type);
- unsigned int final_prec = TYPE_PRECISION (type);
-
- /* Don't propagate ssa names that occur in abnormal phis. */
- if (TREE_CODE (defop0) == SSA_NAME
- && SSA_NAME_OCCURS_IN_ABNORMAL_PHI (defop0))
- return 0;
-
- /* A truncation to an unsigned type should be canonicalized as
- bitwise and of a mask. */
- if (final_int && inter_int && inside_int
- && final_prec == inside_prec
- && final_prec > inter_prec
- && inter_unsignedp)
- {
- tree tem;
- tem = fold_build2 (BIT_AND_EXPR, inside_type,
- defop0,
- wide_int_to_tree
- (inside_type,
- wi::mask (inter_prec, false,
- TYPE_PRECISION (inside_type))));
- if (!useless_type_conversion_p (type, inside_type))
- {
- tem = force_gimple_operand_gsi (gsi, tem, true, NULL_TREE, true,
- GSI_SAME_STMT);
- gimple_assign_set_rhs1 (stmt, tem);
- }
- else
- gimple_assign_set_rhs_from_tree (gsi, tem);
- update_stmt (gsi_stmt (*gsi));
- return 1;
- }
-
- /* If we are converting an integer to a floating-point that can
- represent it exactly and back to an integer, we can skip the
- floating-point conversion. */
- if (inside_int && inter_float && final_int &&
- (unsigned) significand_size (TYPE_MODE (inter_type))
- >= inside_prec - !inside_unsignedp)
- {
- if (useless_type_conversion_p (type, inside_type))
- {
- gimple_assign_set_rhs1 (stmt, unshare_expr (defop0));
- gimple_assign_set_rhs_code (stmt, TREE_CODE (defop0));
- update_stmt (stmt);
- return remove_prop_source_from_use (op0) ? 2 : 1;
- }
- else
- {
- gimple_assign_set_rhs1 (stmt, defop0);
- gimple_assign_set_rhs_code (stmt, CONVERT_EXPR);
- update_stmt (stmt);
- return remove_prop_source_from_use (op0) ? 2 : 1;
- }
- }
- }
-
- return 0;
-}
-
/* Combine an element access with a shuffle. Returns true if there were
any changes made, else it returns false. */
@@ -2768,54 +2235,6 @@ simplify_vector_constructor (gimple_stmt
return true;
}
-/* Simplify multiplications.
- Return true if a transformation applied, otherwise return false. */
-
-static bool
-simplify_mult (gimple_stmt_iterator *gsi)
-{
- gimple stmt = gsi_stmt (*gsi);
- tree arg1 = gimple_assign_rhs1 (stmt);
- tree arg2 = gimple_assign_rhs2 (stmt);
-
- if (TREE_CODE (arg1) != SSA_NAME)
- return false;
-
- gimple def_stmt = SSA_NAME_DEF_STMT (arg1);
- if (!is_gimple_assign (def_stmt))
- return false;
-
- /* Look through a sign-changing conversion. */
- if (CONVERT_EXPR_CODE_P (gimple_assign_rhs_code (def_stmt)))
- {
- if (TYPE_PRECISION (TREE_TYPE (gimple_assign_lhs (def_stmt)))
- != TYPE_PRECISION (TREE_TYPE (gimple_assign_rhs1 (def_stmt)))
- || TREE_CODE (gimple_assign_rhs1 (def_stmt)) != SSA_NAME)
- return false;
- def_stmt = SSA_NAME_DEF_STMT (gimple_assign_rhs1 (def_stmt));
- if (!is_gimple_assign (def_stmt))
- return false;
- }
-
- if (gimple_assign_rhs_code (def_stmt) == EXACT_DIV_EXPR)
- {
- if (operand_equal_p (gimple_assign_rhs2 (def_stmt), arg2, 0))
- {
- tree res = gimple_assign_rhs1 (def_stmt);
- if (useless_type_conversion_p (TREE_TYPE (arg1), TREE_TYPE (res)))
- gimple_assign_set_rhs_with_ops (gsi, TREE_CODE (res), res,
- NULL_TREE);
- else
- gimple_assign_set_rhs_with_ops (gsi, NOP_EXPR, res, NULL_TREE);
- gcc_assert (gsi_stmt (*gsi) == stmt);
- update_stmt (stmt);
- return true;
- }
- }
-
- return false;
-}
-
/* Primitive "lattice" function for gimple_simplify. */
@@ -3033,48 +2452,6 @@ pass_forwprop::execute (function *fun)
|| code == BIT_XOR_EXPR)
&& simplify_rotate (&gsi))
changed = true;
- else if (code == MULT_EXPR)
- {
- changed = simplify_mult (&gsi);
- if (changed
- && maybe_clean_or_replace_eh_stmt (stmt, stmt))
- bitmap_set_bit (to_purge, bb->index);
- }
- else if (code == PLUS_EXPR
- || code == MINUS_EXPR)
- {
- changed = associate_plusminus (&gsi);
- if (changed
- && maybe_clean_or_replace_eh_stmt (stmt, stmt))
- bitmap_set_bit (to_purge, bb->index);
- }
- else if (CONVERT_EXPR_CODE_P (code)
- || code == FLOAT_EXPR
- || code == FIX_TRUNC_EXPR)
- {
- int did_something = combine_conversions (&gsi);
- if (did_something == 2)
- cfg_changed = true;
-
- /* If we have a narrowing conversion to an integral
- type that is fed by a BIT_AND_EXPR, we might be
- able to remove the BIT_AND_EXPR if it merely
- masks off bits outside the final type (and nothing
- else. */
- if (! did_something)
- {
- tree outer_type = TREE_TYPE (gimple_assign_lhs (stmt));
- tree inner_type = TREE_TYPE (gimple_assign_rhs1 (stmt));
- if (TREE_CODE (gimple_assign_rhs1 (stmt)) == SSA_NAME
- && INTEGRAL_TYPE_P (outer_type)
- && INTEGRAL_TYPE_P (inner_type)
- && (TYPE_PRECISION (outer_type)
- <= TYPE_PRECISION (inner_type)))
- did_something = simplify_conversion_from_bitmask (&gsi);
- }
-
- changed = did_something != 0;
- }
else if (code == VEC_PERM_EXPR)
{
int did_something = simplify_permutation (&gsi);
===================================================================
@@ -465,12 +465,6 @@ fold_gimple_assign (gimple_stmt_iterator
}
}
- if (!result)
- result = fold_binary_loc (loc, subcode,
- TREE_TYPE (gimple_assign_lhs (stmt)),
- gimple_assign_rhs1 (stmt),
- gimple_assign_rhs2 (stmt));
-
if (result)
{
STRIP_USELESS_TYPE_CONVERSION (result);
@@ -480,56 +474,6 @@ fold_gimple_assign (gimple_stmt_iterator
break;
case GIMPLE_TERNARY_RHS:
- /* Try to fold a conditional expression. */
- if (gimple_assign_rhs_code (stmt) == COND_EXPR)
- {
- tree op0 = gimple_assign_rhs1 (stmt);
- tree tem;
- bool set = false;
- location_t cond_loc = gimple_location (stmt);
-
- if (COMPARISON_CLASS_P (op0))
- {
- fold_defer_overflow_warnings ();
- tem = fold_binary_loc (cond_loc,
- TREE_CODE (op0), TREE_TYPE (op0),
- TREE_OPERAND (op0, 0),
- TREE_OPERAND (op0, 1));
- /* This is actually a conditional expression, not a GIMPLE
- conditional statement, however, the valid_gimple_rhs_p
- test still applies. */
- set = (tem && is_gimple_condexpr (tem)
- && valid_gimple_rhs_p (tem));
- fold_undefer_overflow_warnings (set, stmt, 0);
- }
- else if (is_gimple_min_invariant (op0))
- {
- tem = op0;
- set = true;
- }
- else
- return NULL_TREE;
-
- if (set)
- result = fold_build3_loc (cond_loc, COND_EXPR,
- TREE_TYPE (gimple_assign_lhs (stmt)), tem,
- gimple_assign_rhs2 (stmt),
- gimple_assign_rhs3 (stmt));
- }
-
- if (!result)
- result = fold_ternary_loc (loc, subcode,
- TREE_TYPE (gimple_assign_lhs (stmt)),
- gimple_assign_rhs1 (stmt),
- gimple_assign_rhs2 (stmt),
- gimple_assign_rhs3 (stmt));
-
- if (result)
- {
- STRIP_USELESS_TYPE_CONVERSION (result);
- if (valid_gimple_rhs_p (result))
- return result;
- }
break;
case GIMPLE_INVALID_RHS:
@@ -4528,33 +4472,11 @@ gimple_fold_stmt_to_constant_1 (gimple s
unshare_expr (op0), off));
}
- return fold_binary_loc (loc, subcode,
- gimple_expr_type (stmt), op0, op1);
+ return NULL_TREE;
}
case GIMPLE_TERNARY_RHS:
- {
- /* Handle ternary operators that can appear in GIMPLE form. */
- tree op0 = (*valueize) (gimple_assign_rhs1 (stmt));
- tree op1 = (*valueize) (gimple_assign_rhs2 (stmt));
- tree op2 = (*valueize) (gimple_assign_rhs3 (stmt));
-
- /* Fold embedded expressions in ternary codes. */
- if ((subcode == COND_EXPR
- || subcode == VEC_COND_EXPR)
- && COMPARISON_CLASS_P (op0))
- {
- tree op00 = (*valueize) (TREE_OPERAND (op0, 0));
- tree op01 = (*valueize) (TREE_OPERAND (op0, 1));
- tree tem = fold_binary_loc (loc, TREE_CODE (op0),
- TREE_TYPE (op0), op00, op01);
- if (tem)
- op0 = tem;
- }
-
- return fold_ternary_loc (loc, subcode,
- gimple_expr_type (stmt), op0, op1, op2);
- }
+ return NULL_TREE;
default:
gcc_unreachable ();