gcc/testsuite/gcc.target/i386/fuse-caller-save.c

   1 /* { dg-do compile } */
   2 /* { dg-options "-O2 -fipa-ra -fomit-frame-pointer" } */
   3 /* { dg-additional-options "-mregparm=1" { target ia32 } } */
   4
   5 /* Testing -fipa-ra optimization option.  */
   6
   7 static int __attribute__((noinline))
   8 bar (int x)
   9 {
  10   return x + 3;
  11 }
  12
  13 int __attribute__((noinline))
  14 foo (int y)
  15 {
  16   return y + bar (y);
  17 }
  18
  19 /* For !nonpic && ia32 xfails, see PR64895.  */
  20
  21 /* Check that no registers are saved/restored. */
  22 /* { dg-final { scan-assembler-not "push" { xfail { { ! nonpic } && ia32 } } } } */
  23 /* { dg-final { scan-assembler-not "pop" { xfail { { ! nonpic } && ia32 } } } } */
  24
  25 /* PR61605.  If the first argument register and the return register differ, then
  26    bar leaves the first argument register intact.  That means in foo that the
  27    first argument register still contains y after bar has been called, and
  28    there's no need to copy y to a different register before the call, to be able
  29    to use it after the call.
  30    Check that the copy is absent.  */
  31 /* { dg-final { scan-assembler-not "movl" { target { ! ia32 } } } } */
  32
  33 /* Check that addition uses di (in case of no copy) or dx (in case of copy). */
  34 /* { dg-final { scan-assembler-times "addl\t%\[re\]?d\[ix\], %\[re\]?ax" 1 { xfail { { ! nonpic } && ia32 } } } } */