gcc/testsuite/gcc.dg/vect/vect-6-big-array.c

   1 /* { dg-require-effective-target vect_float } */
   2 /* { dg-additional-options "-fdump-tree-optimized-details-blocks" } */
   3
   4 #include <stdarg.h>
   5 #include "tree-vect.h"
   6
   7 #define N 128
   8
   9 float results1[N];
  10 float results2[N];
  11 float a[N] = {0};
  12 float e[N] = {0};
  13 float b[N];
  14 float c[N];
  15
  16 __attribute__ ((noinline))
  17 int main1 ()
  18 {
  19   int i;
  20
  21   for (i=0; i<N; i++)
  22     {
  23       b[i] = i*3;
  24       c[i] = i;
  25       results1[i] = 0;
  26       results2[i] = 0;
  27       asm volatile ("" ::: "memory");
  28     }
  29   for (i=0; i<N/2; i++)
  30     {
  31       results1[i] = b[i+N/2] * c[i+N/2] - b[i] * c[i];
  32       results2[i+N/2] = b[i] * c[i+N/2] + b[i+N/2] * c[i];
  33       asm volatile ("" ::: "memory");
  34     }
  35
  36   for (i = 0; i < N/2; i++)
  37     {
  38       a[i] = b[i+N/2] * c[i+N/2] - b[i] * c[i];
  39       e[i+N/2] = b[i] * c[i+N/2] + b[i+N/2] * c[i];
  40     }
  41
  42   /* check results:  */
  43 #pragma GCC novector
  44   for (i=0; i<N; i++)
  45     {
  46       if (a[i] != results1[i] || e[i] != results2[i])
  47         abort ();
  48     }
  49
  50
  51   for (i = 1; i <=N-4; i++)
  52     {
  53       a[i+3] = b[i-1];
  54     }
  55
  56   /* check results:  */
  57 #pragma GCC novector
  58   for (i = 1; i <=N-4; i++)
  59     {
  60       if (a[i+3] != b[i-1])
  61         abort ();
  62     }
  63
  64   return 0;
  65 }
  66
  67 int main (void)
  68 {
  69   check_vect ();
  70
  71   return main1 ();
  72 }
  73
  74 /* { dg-final { scan-tree-dump-times "vectorized 2 loops" 1 "vect" } } */
  75 /* { dg-final { scan-tree-dump-times "Vectorizing an unaligned access" 0 "vect" { target { { vect_aligned_arrays } && {! vect_sizes_32B_16B} } } } } */
  76 /* { dg-final { scan-tree-dump-times "Vectorizing an unaligned access" 1 "vect" { target { {! vect_aligned_arrays } && {vect_sizes_32B_16B} } } } } */
  77 /* { dg-final { scan-tree-dump-not "Invalid sum" "optimized" } } */