gcc/testsuite/gcc.dg/vect/vect-over-widen-1.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)) void
  15 foo (unsigned char *src, unsigned char *dst)
  16 {
  17   unsigned char *s = src;
  18   unsigned short *d = (unsigned short *)dst;
  19   int i;
  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       *d = ((b>>3) | ((g&0xFC)<<3) | ((r&0xF8)<<8) | (a>>5));
  28       d++;
  29     }
  30
  31   s = src;
  32   d = (unsigned short *)dst;
  33 #pragma GCC novector
  34   for (i = 0; i < N/4; i++)
  35     {
  36       const int b = *s++;
  37       const int g = *s++;
  38       const int r = *s++;
  39       const int a = *s++;
  40       if (*d != ((b>>3) | ((g&0xFC)<<3) | ((r&0xF8)<<8) | (a>>5)))
  41         abort ();
  42       d++;
  43     }
  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