gcc/testsuite/gcc.target/i386/shrink_wrap_1.c

   1 /* { dg-do compile { target { ! ia32 } } } */
   2 /* { dg-options "-O2 -fdump-rtl-pro_and_epilogue" } */
   3
   4 enum machine_mode
   5 {
   6   FAKE_0,
   7   FAKE_1,
   8   FAKE_2,
   9   FAKE_3,
  10   FAKE_4,
  11   FAKE_5,
  12   NUM_MACHINE_MODES,
  13 };
  14
  15 typedef int *rtx;
  16 typedef long unsigned int size_t;
  17 extern unsigned char mode_size[NUM_MACHINE_MODES];
  18
  19 extern rtx c_readstr (const char *, enum machine_mode);
  20 extern rtx convert_to_mode (enum machine_mode, rtx, int);
  21 extern rtx expand_mult (enum machine_mode, rtx, rtx, rtx, int);
  22 extern rtx force_reg (enum machine_mode, rtx);
  23 extern unsigned char mode_size_inline (enum machine_mode);
  24 extern void *memset (void *__s, int __c, size_t __n);
  25
  26 rtx
  27 builtin_memset_gen_str (void *data, long offset __attribute__ ((__unused__)),
  28                         enum machine_mode mode)
  29 {
  30   rtx target, coeff;
  31   size_t size;
  32   char *p;
  33
  34   size = ((unsigned short) (__builtin_constant_p (mode)
  35                             ? mode_size_inline (mode) : mode_size[mode]));
  36   if (size == 1)
  37     return (rtx) data;
  38
  39   p = ((char *) __builtin_alloca(sizeof (char) * (size)));
  40   memset (p, 1, size);
  41   coeff = c_readstr (p, mode);
  42
  43   target = convert_to_mode (mode, (rtx) data, 1);
  44   target = expand_mult (mode, target, coeff, (rtx) 0, 1);
  45   return force_reg (mode, target);
  46 }
  47
  48 /* { dg-final { scan-rtl-dump "Performing shrink-wrapping" "pro_and_epilogue"  } } */