gcc/testsuite/gcc.dg/vect/pr65951.c

   1 /* { dg-require-effective-target vect_int } */
   2
   3 #include <stdarg.h>
   4 #include "tree-vect.h"
   5
   6 #define N 512
   7
   8 /* These multiplications should be vectorizable with additions when
   9    no vector shift is available.  */
  10
  11 __attribute__ ((noinline)) void
  12 foo (int *arr)
  13 {
  14   for (int i = 0; i < N; i++)
  15     arr[i] *= 2;
  16 }
  17
  18 __attribute__ ((noinline)) void
  19 foo2 (int *arr)
  20 {
  21   for (int i = 0; i < N; i++)
  22     arr[i] *= 4;
  23 }
  24
  25 int
  26 main (void)
  27 {
  28   check_vect ();
  29   int data[N];
  30   int i;
  31
  32   for (i = 0; i < N; i++)
  33     {
  34       data[i] = i;
  35       __asm__ volatile ("");
  36     }
  37
  38   foo (data);
  39   for (i = 0; i < N; i++)
  40     {
  41       if (data[i] / 2 != i)
  42       __builtin_abort ();
  43       __asm__ volatile ("");
  44     }
  45
  46   for (i = 0; i < N; i++)
  47     {
  48       data[i] = i;
  49       __asm__ volatile ("");
  50     }
  51
  52   foo2 (data);
  53   for (i = 0; i < N; i++)
  54     {
  55       if (data[i] / 4 != i)
  56       __builtin_abort ();
  57       __asm__ volatile ("");
  58     }
  59
  60   return 0;
  61 }
  62
  63 /* { dg-final { scan-tree-dump-times "vectorized 1 loops" 2 "vect" } } */