gcc/testsuite/gcc.dg/vect/vect-58.c

   1 /* Disabling epilogues until we find a better way to deal with scans.  */
   2 /* { dg-additional-options "--param vect-epilogues-nomask=0 -fdump-tree-optimized-details-blocks" } */
   3 /* { dg-require-effective-target vect_float } */
   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/2; i++)
  18     {
  19       if (pa[i+1] != (pb[i+1] * pc[i+1]))
  20         abort ();
  21     }
  22
  23   return;
  24 }
  25
  26 /* Unaligned pointer accesses, with a known alignment.
  27    The loop bound is unknown.
  28    No aliasing problems.
  29    vect-54.c is similar to this one with one difference:
  30         the loop bound is known.  */
  31
  32 float a[N] __attribute__ ((__aligned__(__BIGGEST_ALIGNMENT__)));  float b[N] __attribute__ ((__aligned__(__BIGGEST_ALIGNMENT__))) = {0,3,6,9,12,15,18,21,24,27,30,33,36,39,42,45,48,51,54,57};  float c[N] __attribute__ ((__aligned__(__BIGGEST_ALIGNMENT__))) = {0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19};
  33
  34 __attribute__ ((noinline)) int
  35 main1 (int n)
  36 {
  37   int i;
  38   float *pa = a;
  39   float *pb = b;
  40   float *pc = c;
  41
  42   for (i = 0; i < n/2; i++)
  43     {
  44       pa[i+1] = pb[i+1] * pc[i+1];
  45     }
  46
  47   bar (a,b,c);
  48
  49   return 0;
  50 }
  51
  52 int main (void)
  53 {
  54   int i;
  55   int n=N;
  56
  57   check_vect ();
  58   main1 (n);
  59
  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" } } */
  65 /* { dg-final { scan-tree-dump-times "Alignment of access forced using peeling" 1 "vect" { xfail vect_element_align_preferred } } } */
  66 /* { dg-final { scan-tree-dump-not "Invalid sum" "optimized" } } */