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re PR tree-optimization/50082 (-Wstrict-overflow mishandles typedef) 

2011-08-15  Richard Guenther  <rguenther@suse.de>

	PR middle-end/50082
	* fold-const.c (maybe_canonicalize_comparison_1): Properly
	convert the modified operand to the other operand type.
	(fold_comparison): Call maybe_canonicalize_comparison_1 with
	useless conversions stripped from comparison operands.

From-SVN: r177762
This commit is contained in:
Richard Guenther 2011-08-15 15:01:33 +00:00 committed by Richard Biener
parent 1a0fcfa901
commit d510820a47
2 changed files with 10 additions and 1 deletions
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8
gcc/ChangeLog
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@ -1,3 +1,11 @@
2011-08-15 Richard Guenther <rguenther@suse.de>
PR middle-end/50082
* fold-const.c (maybe_canonicalize_comparison_1): Properly
convert the modified operand to the other operand type.
(fold_comparison): Call maybe_canonicalize_comparison_1 with
useless conversions stripped from comparison operands.
2011-08-15 Richard Guenther <rguenther@suse.de>
* tree-vrp.c (value_range_nonnegative_p): Fix anti-range case.

3
gcc/fold-const.c
View File

@ -8446,6 +8446,7 @@ maybe_canonicalize_comparison_1 (location_t loc, enum tree_code code, tree type,
cst0, build_int_cst (TREE_TYPE (cst0), 1));
if (code0 != INTEGER_CST)
t = fold_build2_loc (loc, code0, TREE_TYPE (arg0), TREE_OPERAND (arg0, 0), t);
t = fold_convert (TREE_TYPE (arg1), t);
/* If swapping might yield to a more canonical form, do so. */
if (swap)
@ -8935,7 +8936,7 @@ fold_comparison (location_t loc, enum tree_code code, tree type,
return fold_build2_loc (loc, cmp_code, type, variable1, const2);
}
tem = maybe_canonicalize_comparison (loc, code, type, op0, op1);
tem = maybe_canonicalize_comparison (loc, code, type, arg0, arg1);
if (tem)
return tem;