gcc/testsuite/gcc.dg/vect/vect-over-widen-4-big-array.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 512
   8
   9 /* Modified rgb to rgb conversion from FFmpeg.  */
  10 __attribute__ ((noinline)) int
  11 foo (unsigned char *src, unsigned char *dst)
  12 {
  13   unsigned char *s = src;
  14   unsigned short *d = (unsigned short *)dst, res;
  15   int i, result = 0;
  16
  17   for (i = 0; i < N/4; i++)
  18     {
  19       const int b = *s++;
  20       const int g = *s++;
  21       const int r = *s++;
  22       const int a = *s++;
  23       res = ((b>>3) | ((g&0xFC)<<3) | ((r&0xF8)<<8) | (a>>5));
  24       *d = res;
  25       result += res;
  26       d++;
  27     }
  28
  29   s = src;
  30   d = (unsigned short *)dst;
  31 #pragma GCC novector
  32   for (i = 0; i < N/4; i++)
  33     {
  34       const int b = *s++;
  35       const int g = *s++;
  36       const int r = *s++;
  37       const int a = *s++;
  38       if (*d != ((b>>3) | ((g&0xFC)<<3) | ((r&0xF8)<<8) | (a>>5)))
  39         abort ();
  40       d++;
  41     }
  42
  43   return result;
  44 }
  45
  46 int main (void)
  47 {
  48   int i;
  49   unsigned char in[N], out[N];
  50
  51   check_vect ();
  52
  53   for (i = 0; i < N; i++)
  54     {
  55       in[i] = i;
  56       out[i] = 255;
  57       __asm__ volatile ("");
  58     }
  59
  60   foo (in, out);
  61
  62   return 0;
  63 }
  64
  65 /* { dg-final { scan-tree-dump-times "vect_recog_widen_shift_pattern: detected" 2 "vect" { target vect_widen_shift } } } */
  66 /* { dg-final { scan-tree-dump {vect_recog_over_widening_pattern: detected:[^\n]* >> 3} "vect" } } */
  67 /* { dg-final { scan-tree-dump {vect_recog_over_widening_pattern: detected:[^\n]* >> 5} "vect" } } */
  68 /* { dg-final { scan-tree-dump-times "vectorized 1 loops" 1 "vect" } } */
  69