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| author | sayle <sayle@138bc75d-0d04-0410-961f-82ee72b054a4> | 2006-02-25 22:27:54 +0000 |
|---|---|---|
| committer | sayle <sayle@138bc75d-0d04-0410-961f-82ee72b054a4> | 2006-02-25 22:27:54 +0000 |
| commit | 47da8b49c58ee20fa06791b9ca20965339301a87 (patch) | |
| tree | 33a222942c6e3c0053613f0b378d977c6e36e141 /gcc/testsuite/gcc.dg/fold-eqxor-2.c | |
| parent | 59da30e18db6518a527b4e6ad223deaab4bd71a9 (diff) | |
| download | gcc-47da8b49c58ee20fa06791b9ca20965339301a87.tar.gz | |
PR middle-end/23673
* fold-const.c (fold_binary) <EQ_EXPR>: Fold (X^Y) == 0 as X == Y
and (X^Y) != 0 as X != Y. Fold (X^Y) == Y as X == 0, and some
symmetry related transformations. Fold (X^C1) == C2 as
X == (C1^C2).
* gcc.dg/fold-eqxor-1.c: New test case.
* gcc.dg/fold-eqxor-2.c: Likewise.
* gcc.dg/fold-eqxor-3.c: Likewise.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@111442 138bc75d-0d04-0410-961f-82ee72b054a4
Diffstat (limited to 'gcc/testsuite/gcc.dg/fold-eqxor-2.c')
| -rw-r--r-- | gcc/testsuite/gcc.dg/fold-eqxor-2.c | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/gcc/testsuite/gcc.dg/fold-eqxor-2.c b/gcc/testsuite/gcc.dg/fold-eqxor-2.c new file mode 100644 index 00000000000..ee5ec9fa5ae --- /dev/null +++ b/gcc/testsuite/gcc.dg/fold-eqxor-2.c @@ -0,0 +1,28 @@ +/* { dg-do compile } */ +/* { dg-options "-O2 -fdump-tree-original" } */ + +int test1(int a, int b) +{ + return (a ^ b) == a; +} + +int test2(int c, int d) +{ + return (c ^ d) != c; +} + +int test3(int e, int f) +{ + return (e ^ f) == f; +} + +int test4(int g, int h) +{ + return (g ^ h) != h; +} + +/* { dg-final { scan-tree-dump-times "b == 0" 1 "original" } } */ +/* { dg-final { scan-tree-dump-times "d != 0" 1 "original" } } */ +/* { dg-final { scan-tree-dump-times "e == 0" 1 "original" } } */ +/* { dg-final { scan-tree-dump-times "g != 0" 1 "original" } } */ +/* { dg-final { cleanup-tree-dump "original" } } */ |