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| author | upstream source tree <ports@midipix.org> | 2015-03-15 20:14:05 -0400 |
|---|---|---|
| committer | upstream source tree <ports@midipix.org> | 2015-03-15 20:14:05 -0400 |
| commit | 554fd8c5195424bdbcabf5de30fdc183aba391bd (patch) | |
| tree | 976dc5ab7fddf506dadce60ae936f43f58787092 /gcc/testsuite/gcc.dg/alias-10.c | |
| download | cbb-gcc-4.6.4-554fd8c5195424bdbcabf5de30fdc183aba391bd.tar.bz2 cbb-gcc-4.6.4-554fd8c5195424bdbcabf5de30fdc183aba391bd.tar.xz | |
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Diffstat (limited to 'gcc/testsuite/gcc.dg/alias-10.c')
| -rw-r--r-- | gcc/testsuite/gcc.dg/alias-10.c | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/gcc/testsuite/gcc.dg/alias-10.c b/gcc/testsuite/gcc.dg/alias-10.c new file mode 100644 index 000000000..6e9cb3f3c --- /dev/null +++ b/gcc/testsuite/gcc.dg/alias-10.c @@ -0,0 +1,32 @@ +/* For PR tree-optimization/14784 */ + +/* { dg-do compile } */ +/* { dg-options "-O2 -funswitch-loops -fdump-tree-unswitch-details" } */ + +typedef struct bitmap_element_def +{ + unsigned int indx; +} bitmap_element; + +typedef struct bitmap_head_def { + bitmap_element *first; + int using_obstack; +} bitmap_head; +typedef struct bitmap_head_def *bitmap; + +bitmap_element *bitmap_free; + +void foo (bitmap head, bitmap_element *elt) +{ + while (1) + { + /* Alias analysis problems used to prevent us from recognizing + that this condition is invariant. */ + if (head->using_obstack) + bitmap_free = elt; + } +} + + +/* { dg-final { scan-tree-dump-times "Unswitching" 1 "unswitch"} } */ +/* { dg-final { cleanup-tree-dump "unswitch" } } */ |