gcc/testsuite/gcc.target/i386/pr11001-memcpy-1.c

   1 /* Ensure that we don't use 'rep movX' in the presence of register globals.  */
   2 /* { dg-do compile } */
   3 /* { dg-options "-Os -w" } */
   4
   5 extern void *memcpy (void *, const void *, __SIZE_TYPE__);
   6
   7 register int regvar asm("%esi");
   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   memcpy (foo, bar, sizeof foo);
  19   memcpy (baz, quux, sizeof baz);
  20 }
  21
  22 /* { dg-final { scan-assembler-not "rep movsl" } } */
  23 /* { dg-final { scan-assembler-not "rep movsb" } } */