gcc/testsuite/gcc.target/arm/pr77933-1.c

   1 /* { dg-do run } */
   2 /* { dg-options "-O2" } */
   3
   4 __attribute__ ((noinline, noclone)) void
   5 clobber_lr_and_highregs (void)
   6 {
   7   __asm__ volatile ("" : : : "r8", "r9", "lr");
   8 }
   9
  10 int
  11 main (void)
  12 {
  13   int ret;
  14
  15   __asm volatile ("mov\tr4, #0xf4\n\t"
  16                   "mov\tr5, #0xf5\n\t"
  17                   "mov\tr6, #0xf6\n\t"
  18                   "mov\tr7, #0xf7\n\t"
  19                   "mov\tr0, #0xf8\n\t"
  20                   "mov\tr8, r0\n\t"
  21                   "mov\tr0, #0xfa\n\t"
  22                   "mov\tr10, r0"
  23                   : : : "r0", "r4", "r5", "r6", "r7", "r8", "r10");
  24
  25   clobber_lr_and_highregs ();
  26
  27   __asm volatile ("cmp\tr4, #0xf4\n\t"
  28                   "bne\tfail\n\t"
  29                   "cmp\tr5, #0xf5\n\t"
  30                   "bne\tfail\n\t"
  31                   "cmp\tr6, #0xf6\n\t"
  32                   "bne\tfail\n\t"
  33                   "cmp\tr7, #0xf7\n\t"
  34                   "bne\tfail\n\t"
  35                   "mov\tr0, r8\n\t"
  36                   "cmp\tr0, #0xf8\n\t"
  37                   "bne\tfail\n\t"
  38                   "mov\tr0, r10\n\t"
  39                   "cmp\tr0, #0xfa\n\t"
  40                   "bne\tfail\n\t"
  41                   "mov\t%0, #1\n"
  42                   "fail:\n\t"
  43                   "sub\tr0, #1"
  44                   : "=r" (ret) : :);
  45   return ret;
  46 }