gcc/testsuite/gcc.dg/vect/vect-widen-shift-s16.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 64
   8 #define C 16
   9
  10 __attribute__ ((noinline)) void
  11 foo (short *src, int *dst)
  12 {
  13   int i;
  14   short b, b0, b1, b2, b3, *s = src;
  15   int *d = dst;
  16
  17   for (i = 0; i < N/4; i++)
  18     {
  19       b0 = *s++;
  20       b1 = *s++;
  21       b2 = *s++;
  22       b3 = *s++;
  23       *d = b0 << C;
  24       d++;
  25       *d = b1 << C;
  26       d++;
  27       *d = b2 << C;
  28       d++;
  29       *d = b3 << C;
  30       d++;
  31     }
  32
  33   s = src;
  34   d = dst;
  35 #pragma GCC novector
  36   for (i = 0; i < N; i++)
  37     {
  38       b = *s++;
  39       if (*d != b << C)
  40         abort ();
  41       d++;
  42     }
  43
  44   s = src;
  45   d = dst;
  46   for (i = 0; i < N/4; i++)
  47     {
  48       b0 = *s++;
  49       b1 = *s++;
  50       b2 = *s++;
  51       b3 = *s++;
  52       *d = b0 << C;
  53       d++;
  54       *d = b1 << C;
  55       d++;
  56       *d = b2 << C;
  57       d++;
  58       *d = b3 << 6;
  59       d++;
  60     }
  61
  62   s = src;
  63   d = dst;
  64 #pragma GCC novector
  65   for (i = 0; i < N/4; i++)
  66     {
  67       b = *s++;
  68       if (*d != b << C)
  69         abort ();
  70       d++;
  71       b = *s++;
  72       if (*d != b << C)
  73         abort ();
  74       d++;
  75       b = *s++;
  76       if (*d != b << C)
  77         abort ();
  78       d++;
  79       b = *s++;
  80       if (*d != b << 6)
  81         abort ();
  82       d++;
  83     }
  84 }
  85
  86 int main (void)
  87 {
  88   int i;
  89   short in[N];
  90   int out[N];
  91
  92   check_vect ();
  93
  94   for (i = 0; i < N; i++)
  95     {
  96       in[i] = i;
  97       out[i] = 255;
  98       __asm__ volatile ("");
  99     }
 100
 101   foo (in, out);
 102
 103   return 0;
 104 }
 105
 106 /* { dg-final { scan-tree-dump-times "vect_recog_widen_shift_pattern: detected" 8 "vect" { target vect_widen_shift } } } */
 107 /* { dg-final { scan-tree-dump-times "vectorized 2 loops" 1 "vect" } } */
 108