| /* { dg-do compile } */ |
| /* { dg-options "-O2 -fipa-ra -fomit-frame-pointer" } */ |
| /* { dg-additional-options "-mregparm=1" { target ia32 } } */ |
| |
| /* Testing -fipa-ra optimization option. */ |
| |
| static int __attribute__((noinline)) |
| bar (int x) |
| { |
| return x + 3; |
| } |
| |
| int __attribute__((noinline)) |
| foo (int y) |
| { |
| return y + bar (y); |
| } |
| |
| /* Check that no registers are saved/restored. */ |
| /* { dg-final { scan-assembler-not "push" } } */ |
| /* { dg-final { scan-assembler-not "pop" } } */ |
| |
| /* PR61605. If the first argument register and the return register differ, then |
| bar leaves the first argument register intact. That means in foo that the |
| first argument register still contains y after bar has been called, and |
| there's no need to copy y to a different register before the call, to be able |
| to use it after the call. |
| Check that the copy is absent. */ |
| /* { dg-final { scan-assembler-not "movl" { target { ! ia32 } } } } */ |
| |
| /* Check that addition uses di (in case of no copy) or dx (in case of copy). */ |
| /* { dg-final { scan-assembler-times "addl\t%\[re\]?d\[ix\], %\[re\]?ax" 1 } } */ |
