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 <stdarg.h>
   5 #include "tree-vect.h"
   6
   7 #define N VECTOR_BITS
   8
   9 /* Modified rgb to rgb conversion from FFmpeg.  */
  10 __attribute__ ((noinline)) void
  11 foo (unsigned char *src, unsigned char *dst)
  12 {
  13   unsigned char *s = src;
  14   unsigned short *d = (unsigned short *)dst;
  15   int i;
  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       *d = ((b>>3) | ((g&0xFFC)<<3) | ((r+0xF8)>>8) | (a<<9));
  24       d++;
  25     }
  26
  27   s = src;
  28   d = (unsigned short *)dst;
  29 #pragma GCC novector
  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       unsigned short expected
  37         = ((b>>3) | ((g&0xFFC)<<3) | ((r+0xF8)>>8) | (a<<9));
  38       if (*d != expected)
  39         abort ();
  40       d++;
  41     }
  42 }
  43
  44 int main (void)
  45 {
  46   int i;
  47   unsigned char in[N], out[N];
  48
  49   check_vect ();
  50
  51   for (i = 0; i < N; i++)
  52     {
  53       in[i] = i;
  54       out[i] = 255;
  55       __asm__ volatile ("");
  56     }
  57
  58   foo (in, out);
  59
  60   return 0;
  61 }
  62
  63 /* { dg-final { scan-tree-dump {vect_recog_over_widening_pattern: detected:[^\n]* >> 3} "vect" } } */
  64 /* { dg-final { scan-tree-dump {vect_recog_over_widening_pattern: detected:[^\n]* >> 8} "vect" } } */
  65 /* { dg-final { scan-tree-dump-times "vectorized 1 loops" 1 "vect" } } */
  66