1 /* { dg-do compile } */
2 /* { dg-skip-if "" { ! { i?86-*-* x86_64-*-* } } } */
3 /* { dg-options "-O2 -fdump-tree-optimized" } */
4 
5 struct thread_info { int preempt_count; };
current_thread_info(void)6 static inline struct thread_info *current_thread_info(void)
7 {
8   register struct thread_info *sp asm("esp");
9   return sp;
10 }
testcase(void)11 void testcase(void)
12 {
13   current_thread_info()->preempt_count += 1;
14 }
15 
16 /* We have to make sure that alias analysis treats sp as pointing
17    to globals and thus the store not optimized away.  */
18 
19 /* { dg-final { scan-tree-dump "->preempt_count =" "optimized" } } */
20