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, float *pb, float *pc)
  26 {
  27   int i;
  28   float b[N] __attribute__ ((__aligned__(__BIGGEST_ALIGNMENT__)));
  29   float c[N] __attribute__ ((__aligned__(__BIGGEST_ALIGNMENT__)));
  30
  31   for (i = 0; i < N; i++)
  32     {
  33       b[i] = pb[i];
  34       c[i] = pc[i];
  35     }
  36
  37   /* Vectorizable: pa may not alias pb and/or pc, even though their
  38      addresses escape.  &pa would need to escape to point to escaped memory.  */
  39   for (i = 0; i < N; i++)
  40     {
  41       pa[i] = b[i] * c[i];
  42     }
  43
  44   bar (pa,b,c);
  45
  46   return 0;
  47 }
  48
  49 __attribute__ ((noinline)) int
  50 main2 (float *pa, float *pb, float *pc)
  51 {
  52   int i;
  53   float b[N] __attribute__ ((__aligned__(__BIGGEST_ALIGNMENT__)));
  54   float c[N] __attribute__ ((__aligned__(__BIGGEST_ALIGNMENT__)));
  55
  56   for (i = 0; i < N; i++)
  57     {
  58       b[i] = pb[i];
  59       c[i] = pc[i];
  60     }
  61
  62   /* Vectorizable: pb and pc addresses do not escape.  */
  63   for (i = 0; i < N; i++)
  64     {
  65       pa[i] = b[i] * c[i];
  66     }
  67
  68   /* check results:  */
  69   for (i = 0; i < N; i++)
  70     {
  71       if (pa[i] != (b[i] * c[i]))
  72         abort ();
  73     }
  74
  75   return 0;
  76 }
  77
  78 int main (void)
  79 {
  80   int i;
  81   float a[N] __attribute__ ((__aligned__(__BIGGEST_ALIGNMENT__)));
  82   float b[N] = {0,3,6,9,12,15,18,21,24,27,30,33,36,39,42,45,48,51,54,57};
  83   float c[N] = {0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19};
  84
  85   check_vect ();
  86
  87   main1 (a,b,c);
  88   main2 (a,b,c);
  89   return 0;
  90 }
  91
  92 /* { dg-final { scan-tree-dump-times "vectorized 2 loops" 2 "vect" } } */
  93 /* { dg-final { scan-tree-dump-times "Alignment of access forced using versioning" 6 "vect" { target vect_no_align } } } */
  94 /* { dg-final { cleanup-tree-dump "vect" } } */