gcc/testsuite/gcc.dg/vect/vect-over-widen-4.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 #if VECTOR_BITS > 128
   8 #define N (VECTOR_BITS * 8 / 16)
   9 #else
  10 #define N 64
  11 #endif
  12
  13 /* Modified rgb to rgb conversion from FFmpeg.  */
  14 __attribute__ ((noinline)) int
  15 foo (unsigned char *src, unsigned char *dst)
  16 {
  17   unsigned char *s = src;
  18   unsigned short *d = (unsigned short *)dst, res;
  19   int i, result = 0;
  20
  21   for (i = 0; i < N/4; i++)
  22     {
  23       const int b = *s++;
  24       const int g = *s++;
  25       const int r = *s++;
  26       const int a = *s++;
  27       res = ((b>>3) | ((g&0xFC)<<3) | ((r&0xF8)<<8) | (a>>5));
  28       *d = res;
  29       result += res;
  30       d++;
  31     }
  32
  33   s = src;
  34   d = (unsigned short *)dst;
  35 #pragma GCC novector
  36   for (i = 0; i < N/4; i++)
  37     {
  38       const int b = *s++;
  39       const int g = *s++;
  40       const int r = *s++;
  41       const int a = *s++;
  42       if (*d != ((b>>3) | ((g&0xFC)<<3) | ((r&0xF8)<<8) | (a>>5)))
  43         abort ();
  44       d++;
  45     }
  46
  47   return result;
  48 }
  49
  50 int main (void)
  51 {
  52   int i;
  53   unsigned char in[N], out[N];
  54
  55   check_vect ();
  56
  57   for (i = 0; i < N; i++)
  58     {
  59       in[i] = i;
  60       out[i] = 255;
  61       __asm__ volatile ("");
  62     }
  63
  64   foo (in, out);
  65
  66   return 0;
  67 }
  68
  69 /* { dg-final { scan-tree-dump-times "vect_recog_widen_shift_pattern: detected" 2 "vect" { target vect_widen_shift } } } */
  70 /* { dg-final { scan-tree-dump {vect_recog_over_widening_pattern: detected:[^\n]* >> 3} "vect" } } */
  71 /* { dg-final { scan-tree-dump {vect_recog_over_widening_pattern: detected:[^\n]* >> 5} "vect" } } */
  72 /* { dg-final { scan-tree-dump-times "vectorized 1 loops" 1 "vect" } } */
  73