pr11001-memcpy-2.c

来自「用于进行gcc测试」· C语言 代码 · 共 24 行

/* Ensure that we don't use 'rep movX' in the presence of register globals.  */
/* { dg-do compile } */
/* { dg-options "-Os -w" } */

extern void *memcpy (void *, const void *, __SIZE_TYPE__);

register int regvar asm("%edi");

int foo[10];
int bar[10];

char baz[15];
char quux[15];

void
do_copy ()
{
  memcpy (foo, bar, sizeof foo);
  memcpy (baz, quux, sizeof baz);
}

/* { dg-final { scan-assembler-not "rep movsl" } } */
/* { dg-final { scan-assembler-not "rep movsb" } } */