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2009-03-31 Richard Guenther <rguenther@suse.de>
authorrguenth <rguenth@138bc75d-0d04-0410-961f-82ee72b054a4>
Tue, 31 Mar 2009 14:28:16 +0000 (14:28 +0000)
committerrguenth <rguenth@138bc75d-0d04-0410-961f-82ee72b054a4>
Tue, 31 Mar 2009 14:28:16 +0000 (14:28 +0000)
commit172e662bea3dd45f48f4155bfa34df25d552d465
tree3375dd6b6a930ea767bbaf4394885cf7b47d7023tree | snapshot
parent401d1fb3672e35a37032eedfbbbdb5d5c6680b69commit | diff
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.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@145345 138bc75d-0d04-0410-961f-82ee72b054a4
gcc/ChangeLog diff | blob | history
gcc/fold-const.c diff | blob | history
gcc/testsuite/ChangeLog diff | blob | 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
Domain: System / Toolchain;