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

   1 /* Ensure that we don't use 'repnz scasb' in the presence of register globals.  */
   2 /* { dg-do compile } */
   3 /* { dg-options "-O1 -w" } */
   4
   5 extern __SIZE_TYPE__ strlen (const char *);
   6 extern void *malloc (__SIZE_TYPE__);
   7
   8 register int regvar asm("%edi");
   9
  10 char *
  11 do_copy (char *str)
  12 {
  13   return malloc (strlen (str) + 1);
  14 }
  15
  16 /* { dg-final { scan-assembler-not "repnz scasb" } } */