2006-10-24 Richard Guenther <rguenther@suse.de>
PR middle-end/27132
PR middle-end/23295
* builtins.c (fold_binary): Remove checks for flag_wrapv
and flag_trapv where negate_expr_p covers these cases.
* gcc.dg/pr27132.c: New testcase.
* gcc.dg/pr23295.c: Likewise.
* gcc.dg/tree-ssa/pr23294.c: Adjust patterns.
* g++.dg/tree-ssa/pr19807.C: Likewise.
2006-10-23 Richard Guenther <rguenther@suse.de>
PR middle-end/29548
* fold-const.c (fold_plusminus_mult_expr): Check exact power
of two on the absolute value.
(fold_binary): Fold x * -C to -x * C if x is easily negatable
and negating -C does not overflow.
From-SVN: r117969
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