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| author | Roger Sayle <roger@eyesopen.com> | 2006-02-28 21:31:29 +0000 |
|---|---|---|
| committer | Roger Sayle <sayle@gcc.gnu.org> | 2006-02-28 21:31:29 +0000 |
| commit | c457fcec8e54df75ee6c133a79cee1417523af59 (patch) | |
| tree | 8d1748fbeb1a55f369adfeaebb8d0d24b433d2d2 /gcc/testsuite/gcc.dg | |
| parent | 63292ebfb4150f957217ca6243dd6de458242591 (diff) | |
| download | gcc-c457fcec8e54df75ee6c133a79cee1417523af59.zip gcc-c457fcec8e54df75ee6c133a79cee1417523af59.tar.gz gcc-c457fcec8e54df75ee6c133a79cee1417523af59.tar.bz2 | |
re PR tree-optimization/14752 ([tree-ssa] "~a" should be changed to "a" if used in the condition of an if statement)
PR middle-end/14752
* c-common.c (c_common_truthvalue_conversion) <MINUS_EXPR,
BIT_XOR_EXPR, BIT_AND_EXPR>: Delete. Let fold optimize these
cases via the construction of "expr != 0".
* gcc.dg/fold-eqandshift-2.c: New test case.
From-SVN: r111575
Diffstat (limited to 'gcc/testsuite/gcc.dg')
| -rw-r--r-- | gcc/testsuite/gcc.dg/fold-eqandshift-2.c | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/gcc/testsuite/gcc.dg/fold-eqandshift-2.c b/gcc/testsuite/gcc.dg/fold-eqandshift-2.c new file mode 100644 index 0000000..14ffb85 --- /dev/null +++ b/gcc/testsuite/gcc.dg/fold-eqandshift-2.c @@ -0,0 +1,22 @@ +/* PR middle-end/14752 */ +/* { dg-do compile } */ +/* { dg-options "-O2 -fdump-tree-original" } */ + +void bar (void); + +void foo (unsigned int a) +{ + if ((a >> 2) & 1) + bar (); +} + +void baz (unsigned int b) +{ + if ((~b >> 2) & 1) + bar (); +} + +/* { dg-final { scan-tree-dump-times "\\(a \& 4\\) != 0" 1 "original" } } */ +/* { dg-final { scan-tree-dump-times "\\(b \& 4\\) == 0" 1 "original" } } */ +/* { dg-final { cleanup-tree-dump "original" } } */ + |