gcc/testsuite/gcc.dg/prefetch-loop-arrays-1.c

   1 /* PR tree-optimization/28887 */
   2 /* { dg-do compile } */
   3 /* { dg-options "-O2 -fprefetch-loop-arrays -w" } */
   4 /* { dg-options "-O2 -fprefetch-loop-arrays -march=i686 -msse -w" { target { { i?86-*-* x86_64-*-* } && ia32 } } } */
   5
   6 __extension__ typedef __SIZE_TYPE__ size_t;
   7
   8 struct re_pattern_buffer
   9 {
  10   size_t re_nsub;
  11 };
  12
  13 typedef enum
  14 {
  15   start_memory,
  16 } re_opcode_t;
  17
  18 typedef union
  19 {
  20   struct
  21   {
  22     unsigned matched_something:1;
  23   } bits;
  24 } byte_register_info_type;
  25
  26 void byte_re_match_2_internal (struct re_pattern_buffer *bufp)
  27 {
  28   int mcnt;
  29   size_t num_regs = bufp->re_nsub + 1;
  30   byte_register_info_type *reg_info;
  31   for (mcnt = 1; (unsigned) mcnt < num_regs; mcnt++)
  32     {
  33       ((reg_info[mcnt]).bits.matched_something) = 0;
  34     }
  35 }
  36