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| author | sayle <sayle@138bc75d-0d04-0410-961f-82ee72b054a4> | 2006-11-12 18:41:31 +0000 |
|---|---|---|
| committer | sayle <sayle@138bc75d-0d04-0410-961f-82ee72b054a4> | 2006-11-12 18:41:31 +0000 |
| commit | 32484276f69da1dec8600428f6c9eb387aa06a2d (patch) | |
| tree | b02ba3cb889c222125601c7fa415210e5d22fcf6 /gcc/testsuite/gcc.dg/fold-eqand-1.c | |
| parent | 56743459ef01d1123da77ce237b73dfbfd49badd (diff) | |
| download | gcc-32484276f69da1dec8600428f6c9eb387aa06a2d.tar.gz | |
PR tree-optimization/13827
* fold-const.c (fold_binary) <EQ_EXPR, NE_EXPR>: Fold (X&C) op (Y&C)
as ((X^Y)&C) op 0.
* gcc.dg/fold-eqand-1.c: New test case.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@118727 138bc75d-0d04-0410-961f-82ee72b054a4
Diffstat (limited to 'gcc/testsuite/gcc.dg/fold-eqand-1.c')
| -rw-r--r-- | gcc/testsuite/gcc.dg/fold-eqand-1.c | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/gcc/testsuite/gcc.dg/fold-eqand-1.c b/gcc/testsuite/gcc.dg/fold-eqand-1.c new file mode 100644 index 00000000000..6ed5b6db0e2 --- /dev/null +++ b/gcc/testsuite/gcc.dg/fold-eqand-1.c @@ -0,0 +1,17 @@ +/* PR tree-optimization/13827 */ +/* { dg-do compile } */ +/* { dg-options "-O2 -fdump-tree-original" } */ + +unsigned foo (unsigned a, unsigned b) +{ + return (a & 0xff00) != (b & 0xff00); +} + +unsigned bar (unsigned c, unsigned d) +{ + return (c & 0xff00) == (d & 0xff00); +} + +/* { dg-final { scan-tree-dump-times "a \\^ b" 1 "original" } } */ +/* { dg-final { scan-tree-dump-times "c \\^ d" 1 "original" } } */ +/* { dg-final { cleanup-tree-dump "original" } } */ |