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   for (i = 0; i < N; i++)
  27     {
  28       b = *s++;
  29       if (*d != b << C)
  30         abort ();
  31       d++;
  32     }
  33 }
  34
  35 int main (void)
  36 {
  37   int i;
  38   unsigned short in[N];
  39   unsigned int out[N];
  40
  41   check_vect ();
  42
  43   for (i = 0; i < N; i++)
  44     {
  45       in[i] = i;
  46       out[i] = 255;
  47       __asm__ volatile ("");
  48     }
  49
  50   foo (in, out);
  51
  52   return 0;
  53 }
  54
  55 /* { dg-final { scan-tree-dump-times "vect_recog_widen_shift_pattern: detected" 1 "vect" { target vect_widen_shift } } } */
  56 /* { dg-final { scan-tree-dump-times "vectorized 1 loops" 1 "vect" } } */
  57