gcc/testsuite/gcc.target/i386/stack-check-17.c

   1 /* { dg-do compile } */
   2 /* { dg-options "-O2 -fstack-clash-protection -mtune=generic -fomit-frame-pointer" } */
   3 /* { dg-require-effective-target supports_stack_clash_protection } */
   4 /* { dg-skip-if "" { *-*-* } { "-fstack-protector*" } { "" } } */
   5
   6
   7
   8 int x0, x1;
   9 void f1 (void);
  10 void f2 (int, int);
  11
  12 __attribute__ ((noreturn))
  13 void
  14 f3 (void)
  15 {
  16   int y0 = x0;
  17   int y1 = x1;
  18   f1 ();
  19   f2 (y0, y1);
  20   while (1);
  21 }
  22
  23 /* Verify no explicit probes.  */
  24 /* { dg-final { scan-assembler-not "or\[ql\]" } } */
  25
  26 /* We also want to verify we did not use a push/pop sequence
  27    to probe *sp as the callee register saves are sufficient
  28    to probe *sp.
  29
  30    y0/y1 are live across the call and thus must be allocated
  31    into either a stack slot or callee saved register.  The former
  32    would be rather dumb.  So assume it does not happen.
  33
  34    So search for two/four pushes for the callee register saves/argument
  35    pushes and no pops (since the function has no reachable epilogue).  */
  36 /* { dg-final { scan-assembler-times "push\[ql\]" 2 { target { ! ia32 } } } }  */
  37 /* { dg-final { scan-assembler-times "push\[ql\]" 4 { target { ia32 } } } }  */
  38 /* { dg-final { scan-assembler-not "pop" } } */
  39