| /* Check that -fstack-protector is accepted and that the canary is set from |
| __stack_chk_guard and tested before returning. The scratch registers used |
| to carry the canary must be cleared afterwards, so that its value is not |
| left recoverable in a register or in a spill slot. */ |
| |
| /* { dg-do compile } */ |
| /* { dg-options "-O2 -fstack-protector-all" } */ |
| |
| extern void g (char *); |
| |
| int |
| f (void) |
| { |
| char buf[64]; |
| g (buf); |
| return 0; |
| } |
| |
| /* { dg-final { scan-assembler "__stack_chk_guard" } } */ |
| /* { dg-final { scan-assembler "__stack_chk_fail" } } */ |
| /* { dg-final { scan-assembler "\\sxor\\s\\\$\[0-9\]+,\\\$\[0-9\]+,\\\$\[0-9\]+\\s" } } */ |
| /* One scratch cleared by stack_protect_setdi, one by stack_protect_testdi. |
| The pattern deliberately does not match "bis $31,$31,$31", which is a nop |
| the scheduler may insert anywhere. */ |
| /* { dg-final { scan-assembler-times "\\sbis\\s\\\$31,\\\$31,\\\$(\[0-9\]|1\[0-9\]|2\[0-9\]|30)\\n" 2 } } */ |
