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| author | Martin Sebor <msebor@redhat.com> | 2016-02-26 23:24:29 +0000 |
|---|---|---|
| committer | Martin Sebor <msebor@gcc.gnu.org> | 2016-02-26 16:24:29 -0700 |
| commit | 20ba5f3318378eb29b15674e2ef37c6c26a1d465 (patch) | |
| tree | 0291a9f723362d429ff9f66befe0d9043e0dfb27 | |
| parent | e6fb01b00cd11497df8f5733d205ae6bc2c52e69 (diff) | |
| download | gcc-20ba5f3318378eb29b15674e2ef37c6c26a1d465.zip gcc-20ba5f3318378eb29b15674e2ef37c6c26a1d465.tar.gz gcc-20ba5f3318378eb29b15674e2ef37c6c26a1d465.tar.bz2 | |
PR tree-optimization/15826 - don't use "if" to extract a single bit
PR tree-optimization/15826 - don't use "if" to extract a single bit
bit-field
2016-02-26 Martin Sebor <msebor@redhat.com>
PR tree-optimization/15826
* gcc.dg/tree-ssa/pr15826.c: New test.
From-SVN: r233771
| -rw-r--r-- | gcc/testsuite/ChangeLog | 5 | ||||
| -rw-r--r-- | gcc/testsuite/gcc.dg/tree-ssa/pr15826.c | 36 |
2 files changed, 41 insertions, 0 deletions
diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog index 65ee228..f5d49d0 100644 --- a/gcc/testsuite/ChangeLog +++ b/gcc/testsuite/ChangeLog @@ -1,3 +1,8 @@ +2016-02-26 Martin Sebor <msebor@redhat.com> + + PR tree-optimization/15826 + * gcc.dg/tree-ssa/pr15826.c: New test. + 2016-02-26 Jakub Jelinek <jakub@redhat.com> PR target/69969 diff --git a/gcc/testsuite/gcc.dg/tree-ssa/pr15826.c b/gcc/testsuite/gcc.dg/tree-ssa/pr15826.c new file mode 100644 index 0000000..99ac0e2 --- /dev/null +++ b/gcc/testsuite/gcc.dg/tree-ssa/pr15826.c @@ -0,0 +1,36 @@ +/* PR tree-optimization/15826 - don't use "if" to extract a single bit + bit-field */ +/* { dg-do compile } */ +/* { dg-options "-O2 -fdump-tree-optimized" } */ + +struct s { + unsigned int bit : 1; +}; + +unsigned int +foo (struct s *p) +{ + if (p->bit) + return 1; + else + return 0; +} + +unsigned int +bar (struct s *p) +{ + return (unsigned int) (p->bit); +} + +unsigned int +andrew (struct s *p) +{ + int i; + if (p->bit) + i = 1; + else + i = 0; + return i; +} + +/* { dg-final { scan-tree-dump-times " & | goto " 0 "optimized" } } */ |