gcc/testsuite/gcc.dg/vect/no-vfa-vect-43.c

   1 /* { dg-require-effective-target vect_float } */
   2
   3 #include <stdarg.h>
   4 #include "tree-vect.h"
   5
   6 #define N 256
   7
   8 __attribute__ ((noinline))
   9 void bar (float *pa, float *pb, float *pc)
  10 {
  11   int i;
  12
  13   /* check results:  */
  14   for (i = 0; i < N; i++)
  15     {
  16       if (pa[i] != (pb[i] * pc[i]))
  17         abort ();
  18     }
  19
  20   return;
  21 }
  22
  23
  24 __attribute__ ((noinline)) int
  25 main1 (float *pa)
  26 {
  27   int i;
  28   float pb[N] __attribute__ ((__aligned__(16))) = {0,3,6,9,12,15,18,21,24,27,30,33,36,39,42,45,48,51,54,57};
  29   float pc[N] __attribute__ ((__aligned__(16))) = {0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19};
  30
  31  /* Not vectorizable: pa may alias pb and/or pc, since their addresses escape.  */
  32   for (i = 0; i < N; i++)
  33     {
  34       pa[i] = pb[i] * pc[i];
  35     }
  36
  37   bar (pa,pb,pc);
  38
  39   return 0;
  40 }
  41
  42 __attribute__ ((noinline)) int
  43 main2 (float * pa)
  44 {
  45   int i;
  46   float pb[N] = {0,3,6,9,12,15,18,21,24,27,30,33,36,39,42,45,48,51,54,57};
  47   float pc[N] = {0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19};
  48
  49   /* Vectorizable: pb and pc addresses do not escape.  */
  50   for (i = 0; i < N; i++)
  51     {
  52       pa[i] = pb[i] * pc[i];
  53     }
  54
  55   /* check results:  */
  56   for (i = 0; i < N; i++)
  57     {
  58       if (pa[i] != (pb[i] * pc[i]))
  59         abort ();
  60     }
  61
  62   return 0;
  63 }
  64
  65 int main (void)
  66 {
  67   int i;
  68   float a[N] __attribute__ ((__aligned__(16)));
  69
  70   check_vect ();
  71
  72   main1 (a);
  73   main2 (a);
  74   return 0;
  75 }
  76
  77 /* { dg-final { scan-tree-dump-times "vectorized 1 loops" 1 "vect" } } */
  78 /*  { dg-final { scan-tree-dump-times "Alignment of access forced using versioning" 1 "vect" { target vect_no_align } } } */
  79 /* { dg-final { cleanup-tree-dump "vect" } } */