| /* PR rtl-optimization/9771 */ |
| /* { dg-do run { target i?86-*-* x86_64-*-* } } */ |
| /* { dg-require-effective-target ilp32 } */ |
| /* { dg-options "-O2 -fomit-frame-pointer -ffixed-ebp" } */ |
| |
| extern void abort(void); |
| extern void exit(int); |
| |
| register long *B asm ("ebp"); |
| |
| long x = 10; |
| long y = 20; |
| |
| void bar(void) |
| { |
| B = &y; |
| } |
| |
| void foo() |
| { |
| long *adr = B; |
| long save = *adr; |
| |
| *adr = 123; |
| |
| bar(); |
| |
| *adr = save; |
| } |
| |
| int main() |
| { |
| B = &x; |
| |
| foo(); |
| |
| if (x != 10 || y != 20) |
| abort(); |
| |
| /* We can't return, as our caller may assume %ebp is preserved! */ |
| /* We could save/restore it (like foo), but its easier to exit. */ |
| exit(0); |
| } |
| |
