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author	Richard Guenther <rguenther@suse.de>
	Tue, 31 Mar 2009 14:28:16 +0000 (14:28 +0000)
committer	Richard Biener <rguenth@gcc.gnu.org>
	Tue, 31 Mar 2009 14:28:16 +0000 (14:28 +0000)
commit	6b12efe971ad59e925d119243e6b6fabfdc2ba05
tree	3375dd6b6a930ea767bbaf4394885cf7b47d7023	tree
parent	108f6c2f4efe0141c859eeb52fae610b8806ffc8	commit \| diff

re PR middle-end/31029 (Fold does not fold C - a == a)

2009-03-31 Richard Guenther <rguenther@suse.de>

PR middle-end/31029
* fold-const.c (fold_binary): Fold X +- Y CMP X to Y CMP 0 for
equality comparisons. Fold C - X CMP X if C % 2 == 1.

* gcc.dg/fold-compare-4.c: New testcase.
* gcc.dg/fold-compare-5.c: Likewise.

From-SVN: r145345

gcc/ChangeLog		diff \| blob \| blame \| history
gcc/fold-const.c		diff \| blob \| blame \| history
gcc/testsuite/ChangeLog		diff \| blob \| blame \| history
gcc/testsuite/gcc.dg/fold-compare-4.c	[new file with mode: 0644]	blob
gcc/testsuite/gcc.dg/fold-compare-5.c	[new file with mode: 0644]	blob

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