gcc/testsuite/gcc.dg/vect/vect-50.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 __attribute__ ((noinline)) int
  24 main1 (int n, float * __restrict__ pa, float * __restrict__ pb, float * __restrict__ pc)
  25 {
  26   int i;
  27
  28   for (i = 0; i < n; i++)
  29     {
  30       pa[i] = pb[i] * pc[i];
  31     }
  32
  33   bar (pa,pb,pc);
  34
  35   return 0;
  36 }
  37
  38 /* Unaligned pointer accesses, with unknown alignment.
  39    The loop bound is unknown.
  40    No aliasing problems.
  41    vect-44.c is similar to this one with one difference:
  42         the loop bound is known.
  43    vect-51.c is similar to this one with one difference:
  44         can't prove that pointers don't alias.  */
  45
  46 int main (void)
  47 {
  48   int i;
  49   float a[N];
  50   float b[N] = {0,3,6,9,12,15,18,21,24,27,30,33,36,39,42,45,48,51,54,57};
  51   float c[N] = {0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19};
  52
  53   check_vect ();
  54
  55   main1 (N,a,b,c);
  56   return 0;
  57 }
  58
  59 /* For targets that don't support misaligned loads we version for the
  60    all three accesses (peeling to align the store will not force the
  61    two loads to be aligned).  */
  62
  63 /* { dg-final { scan-tree-dump-times "vectorized 1 loops" 1 "vect" } } */
  64 /* { dg-final { scan-tree-dump-times "Vectorizing an unaligned access" 2 "vect" { xfail vect_no_align } } } */
  65 /* { dg-final { scan-tree-dump-times "Alignment of access forced using peeling" 1 "vect" { xfail { vect_no_align || {! vector_alignment_reachable} } } } } */
  66 /* { dg-final { scan-tree-dump-times "Alignment of access forced using versioning." 3 "vect" { target vect_no_align } } } */
  67 /* { dg-final { scan-tree-dump-times "Alignment of access forced using versioning." 1 "vect" { target { {! vector_alignment_reachable} && {! vect_no_align} } } } } */
  68 /* { dg-final { cleanup-tree-dump "vect" } } */