gcc/testsuite/gcc.dg/vect/vect-40.c

   1 /* { dg-require-effective-target vect_float } */
   2 /* { dg-add-options double_vectors } */
   3 /* { dg-additional-options "-fdump-tree-optimized-details-blocks" } */
   4
   5 #include <stdarg.h>
   6 #include "tree-vect.h"
   7
   8 #define N 256
   9
  10 __attribute__ ((noinline))
  11 void bar (float *pa, float *pb, float *pc)
  12 {
  13   int i;
  14
  15   /* check results:  */
  16 #pragma GCC novector
  17   for (i = 0; i < N; i++)
  18     {
  19       if (pa[i] != (pb[i] * pc[i]))
  20         abort ();
  21     }
  22
  23   return;
  24 }
  25
  26 /* Aligned pointer accesses.
  27    The loop bound is known and divisible by the vectorization factor.
  28    No aliasing problems.
  29    vect-46.c is similar to this one with one difference:
  30         the loop bound is unknown.  */
  31
  32 float b[N] __attribute__ ((__aligned__(__BIGGEST_ALIGNMENT__)))
  33      = {0,3,6,9,12,15,18,21,24,27,30,33,36,39,42,45,48,51,54,57};
  34 float c[N] __attribute__ ((__aligned__(__BIGGEST_ALIGNMENT__)))
  35      = {0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19};
  36
  37 __attribute__ ((noinline)) int
  38 main1 ()
  39 {
  40   int i;
  41   float a[N] __attribute__ ((__aligned__(__BIGGEST_ALIGNMENT__)));
  42   float *pa = a;
  43   float *pb = b;
  44   float *pc = c;
  45
  46   for (i = 0; i < N; i++)
  47     {
  48       pa[i] = pb[i] * pc[i];
  49     }
  50
  51   bar (pa,pb,pc);
  52
  53   return 0;
  54 }
  55
  56 int main (void)
  57 {
  58   check_vect ();
  59   main1 ();
  60   return 0;
  61 }
  62
  63 /* { dg-final { scan-tree-dump-times "vectorized 1 loops" 1 "vect"} } */
  64 /* { dg-final { scan-tree-dump-times "Vectorizing an unaligned access" 0 "vect" { xfail { ! vect_align_stack_vars } } } } */
  65 /* { dg-final { scan-tree-dump-not "Invalid sum" "optimized" } } */