gcc/testsuite/gcc.dg/vect/vect-over-widen-3-big-array.c

   1 /* { dg-require-effective-target vect_int } */
   2 /* { dg-require-effective-target vect_shift } */
   3
   4 #include <stdlib.h>
   5 #include <stdarg.h>
   6 #include "tree-vect.h"
   7
   8 #define N 128
   9
  10 /* Modified rgb to rgb conversion from FFmpeg.  */
  11 __attribute__ ((noinline)) void
  12 foo (unsigned char *src, unsigned char *dst)
  13 {
  14   unsigned char *s = src;
  15   unsigned short *d = (unsigned short *)dst;
  16   int i;
  17
  18   for (i = 0; i < N/4; i++)
  19     {
  20       const int b = *s++;
  21       const int g = *s++;
  22       const int r = *s++;
  23       const int a = *s++;
  24       *d = ((b>>3) | ((g&0xFFC)<<3) | ((r+0xF8)>>8) | (a<<9));
  25       d++;
  26     }
  27
  28   s = src;
  29   d = (unsigned short *)dst;
  30   for (i = 0; i < N/4; i++)
  31     {
  32       const int b = *s++;
  33       const int g = *s++;
  34       const int r = *s++;
  35       const int a = *s++;
  36       if (*d != ((b>>3) | ((g&0xFFC)<<3) | ((r+0xF8)>>8) | (a<<9)))
  37         abort ();
  38       d++;
  39     }
  40 }
  41
  42 int main (void)
  43 {
  44   int i;
  45   unsigned char in[N], out[N];
  46
  47   check_vect ();
  48
  49   for (i = 0; i < N; i++)
  50     {
  51       in[i] = i;
  52       out[i] = 255;
  53       __asm__ volatile ("");
  54     }
  55
  56   foo (in, out);
  57
  58   return 0;
  59 }
  60
  61 /* { dg-final { scan-tree-dump-times "vect_recog_over_widening_pattern: detected" 1 "vect" } } */
  62 /* { dg-final { scan-tree-dump-times "vectorized 1 loops" 1 "vect" } } */
  63 /* { dg-final { cleanup-tree-dump "vect" } } */
  64