embedded-4_9-branch/gcc/testsuite/gcc.target/arm/pr64818.c

   1 /* { dg-do compile } */
   2 /* { dg-options "-O1" } */
   3
   4 char temp[16];
   5 extern int foo1 (void);
   6
   7 void foo (void)
   8 {
   9   int i;
  10   int len;
  11
  12   while (1)
  13   {
  14     len = foo1 ();
  15     register int a asm ("r0") = 5;
  16     register char *b asm ("r1") = temp;
  17     register int c asm ("r2") = len;
  18     asm volatile ("mov %[r0], %[r0]\n  mov %[r1], %[r1]\n  mov %[r2], %[r2]\n"
  19                    : "+m"(*b)
  20                    : [r0]"r"(a), [r1]"r"(b), [r2]"r"(c));
  21
  22     for (i = 0; i < len; i++)
  23     {
  24       if (temp[i] == 10)
  25       return;
  26     }
  27   }
  28 }
  29
  30 /* { dg-final { scan-assembler "\[\\t \]+mov\ r1,\ r1" } } */