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| author | Ben Cheng <bccheng@google.com> | 2014-03-25 22:37:19 -0700 |
|---|---|---|
| committer | Ben Cheng <bccheng@google.com> | 2014-03-25 22:37:19 -0700 |
| commit | 1bc5aee63eb72b341f506ad058502cd0361f0d10 (patch) | |
| tree | c607e8252f3405424ff15bc2d00aa38dadbb2518 /gcc-4.9/gcc/testsuite/gcc.dg/tree-ssa/alias-20.c | |
| parent | 283a0bf58fcf333c58a2a92c3ebbc41fb9eb1fdb (diff) | |
| download | toolchain_gcc-1bc5aee63eb72b341f506ad058502cd0361f0d10.tar.gz toolchain_gcc-1bc5aee63eb72b341f506ad058502cd0361f0d10.tar.bz2 toolchain_gcc-1bc5aee63eb72b341f506ad058502cd0361f0d10.zip | |
Initial checkin of GCC 4.9.0 from trunk (r208799).
Change-Id: I48a3c08bb98542aa215912a75f03c0890e497dba
Diffstat (limited to 'gcc-4.9/gcc/testsuite/gcc.dg/tree-ssa/alias-20.c')
| -rw-r--r-- | gcc-4.9/gcc/testsuite/gcc.dg/tree-ssa/alias-20.c | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/gcc-4.9/gcc/testsuite/gcc.dg/tree-ssa/alias-20.c b/gcc-4.9/gcc/testsuite/gcc.dg/tree-ssa/alias-20.c new file mode 100644 index 000000000..7991c52fd --- /dev/null +++ b/gcc-4.9/gcc/testsuite/gcc.dg/tree-ssa/alias-20.c @@ -0,0 +1,24 @@ +/* { dg-do compile } */ +/* { dg-options "-O -fstrict-aliasing -fdump-tree-optimized" } */ + +struct S { float f; int i; }; +struct R { int x; int i; }; + +/* Strict-aliasing rules say that int and float do not alias. */ +int bar(struct S *s, int *i) +{ + *i = 0; + s->f = 1.0; + return *i; +} + +/* Strict-aliasing rules say that S and R do not alias. */ +int foo(struct S *s, struct R *r) +{ + r->i = 0; + s->i = 1; + return r->i; +} + +/* { dg-final { scan-tree-dump-times "return 0;" 2 "optimized" } } */ +/* { dg-final { cleanup-tree-dump "optimized" } } */ |