| /* { dg-do compile } */ |
| /* { dg-options "-O2 -fno-store-merging" } */ |
| /* { dg-additional-options "-fno-PIE" { target ia32 } } */ |
| /* { dg-additional-options "-fno-common -mdynamic-no-pic" { target { ia32 && { x86_64-*-darwin* i?86-*-darwin* } } } } */ |
| |
| struct B { |
| B() {} |
| int x; |
| int a : 6; |
| int b : 6; |
| int c : 6; |
| }; |
| |
| struct C : B { |
| char d; |
| }; |
| |
| C c; |
| |
| int main() |
| { |
| /* We have to make sure to not cause a store data race between |
| c.c and c.d residing in the tail padding of B. */ |
| c.c = 1; |
| c.d = 2; |
| } |
| |
| /* In particular on x86 c.d should not be loaded/stored via movl. */ |
| /* { dg-final { scan-assembler-not "movl" { target { x86_64-*-* i?86-*-* } } } } */ |
