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   for (i = 0; i < N/4; i++)
  34     {
  35       const int b = *s++;
  36       const int g = *s++;
  37       const int r = *s++;
  38       const int a = *s++;
  39       if (*d != ((b>>3) | ((g&0xFC)<<3) | ((r&0xF8)<<8) | (a>>5)))
  40         abort ();
  41       d++;
  42     }
  43 }
  44
  45 int main (void)
  46 {
  47   int i;
  48   unsigned char in[N], out[N];
  49
  50   check_vect ();
  51
  52   for (i = 0; i < N; i++)
  53     {
  54       in[i] = i;
  55       out[i] = 255;
  56       __asm__ volatile ("");
  57     }
  58
  59   foo (in, out);
  60
  61   return 0;
  62 }
  63
  64 /* { dg-final { scan-tree-dump-times "vect_recog_widen_shift_pattern: detected" 2 "vect" { target vect_widen_shift } } } */
  65 /* { dg-final { scan-tree-dump-times "vect_recog_over_widening_pattern: detected" 2 "vect" { target vect_widen_shift } } } */
  66 /* { dg-final { scan-tree-dump-times "vect_recog_over_widening_pattern: detected" 4 "vect" { target { { ! vect_sizes_32B_16B } && { ! vect_widen_shift } } } } } */
  67 /* { dg-final { scan-tree-dump-times "vect_recog_over_widening_pattern: detected" 8 "vect" { target vect_sizes_32B_16B } } } */
  68 /* { dg-final { scan-tree-dump-times "vectorized 1 loops" 1 "vect" } } */
  69