diff options
Diffstat (limited to 'gcc/testsuite')
| -rw-r--r-- | gcc/testsuite/ChangeLog | 5 | ||||
| -rw-r--r-- | gcc/testsuite/gcc.dg/tree-ssa/pr47286.c | 20 |
2 files changed, 25 insertions, 0 deletions
diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog index 8762f9a..ed3a787 100644 --- a/gcc/testsuite/ChangeLog +++ b/gcc/testsuite/ChangeLog @@ -1,3 +1,8 @@ +2011-01-14 Richard Guenther <rguenther@suse.de> + + PR tree-optimization/47286 + * gcc.dg/tree-ssa/pr47286.c: New testcase. + 2011-01-13 Kai Tietz <kai.tietz@onevision.com> PR c++/47213 diff --git a/gcc/testsuite/gcc.dg/tree-ssa/pr47286.c b/gcc/testsuite/gcc.dg/tree-ssa/pr47286.c new file mode 100644 index 0000000..b03c59b --- /dev/null +++ b/gcc/testsuite/gcc.dg/tree-ssa/pr47286.c @@ -0,0 +1,20 @@ +/* { dg-do compile } */ +/* { dg-skip-if "" { ! { i?86-*-* x86_64-*-* } } { "*" } { "" } } */ +/* { dg-options "-O2 -fdump-tree-optimized" } */ + +struct thread_info { int preempt_count; }; +static inline struct thread_info *current_thread_info(void) +{ + register struct thread_info *sp asm("esp"); + return sp; +} +void testcase(void) +{ + current_thread_info()->preempt_count += 1; +} + +/* We have to make sure that alias analysis treats sp as pointing + to globals and thus the store not optimized away. */ + +/* { dg-final { scan-tree-dump "->preempt_count =" "optimized" } } */ +/* { dg-final { cleanup-tree-dump "optimized" } } */ |