gcc/testsuite/gcc.dg/vect/vect-widen-shift-u16.c

   1 /* { dg-require-effective-target vect_int } */
   2 /* { dg-require-effective-target vect_shift } */
   3
   4 #include <stdarg.h>
   5 #include "tree-vect.h"
   6
   7 #define N 64
   8 #define C 7
   9
  10 __attribute__ ((noinline)) void
  11 foo (unsigned short *src, unsigned int *dst)
  12 {
  13   int i;
  14   unsigned short b, *s = src;
  15   unsigned int *d = dst;
  16
  17   for (i = 0; i < N; i++)
  18     {
  19       b = *s++;
  20       *d = b << C;
  21       d++;
  22     }
  23
  24   s = src;
  25   d = dst;
  26 #pragma GCC novector
  27   for (i = 0; i < N; i++)
  28     {
  29       b = *s++;
  30       if (*d != b << C)
  31         abort ();
  32       d++;
  33     }
  34 }
  35
  36 int main (void)
  37 {
  38   int i;
  39   unsigned short in[N];
  40   unsigned int out[N];
  41
  42   check_vect ();
  43
  44   for (i = 0; i < N; i++)
  45     {
  46       in[i] = i;
  47       out[i] = 255;
  48       __asm__ volatile ("");
  49     }
  50
  51   foo (in, out);
  52
  53   return 0;
  54 }
  55
  56 /* { dg-final { scan-tree-dump-times "vect_recog_widen_shift_pattern: detected" 1 "vect" { target vect_widen_shift } } } */
  57 /* { dg-final { scan-tree-dump-times "vectorized 1 loops" 1 "vect" } } */
  58