gcc/testsuite/gcc.target/i386/pr11001-memset-2.c

   1 /* Ensure that we don't use 'rep stoX' in the presence of register globals.  */
   2 /* { dg-do compile } */
   3 /* { dg-options "-Os -w" } */
   4
   5 extern void *memset (void *, int, __SIZE_TYPE__);
   6
   7 register int regvar asm("%ecx");
   8
   9 int foo[10];
  10 int bar[10];
  11
  12 char baz[15];
  13 char quux[15];
  14
  15 void
  16 do_copy ()
  17 {
  18   memset (foo, 0, sizeof foo);
  19   memset (baz, 0, sizeof baz);
  20 }
  21
  22 /* { dg-final { scan-assembler-not "rep stosl" } } */
  23 /* { dg-final { scan-assembler-not "rep stosb" } } */