gcc/testsuite/gcc.dg/vect/vect-56.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/2; i++)
  15     {
  16       if (pa[i] != (pb[i+1] * pc[i+1]))
  17         abort ();
  18     }
  19
  20   return;
  21 }
  22
  23 /* Unaligned pointer read accesses, aligned write access.
  24    The loop bound is known and divisible by the vectorization factor.
  25    No aliasing problems.
  26    vect-48.c is similar to this one with one difference:
  27         the alignment of the read accesses is unknown.
  28    vect-60.c is similar to this one with one difference:
  29         the loop bound is unknown.
  30    vect-57.c is similar to this one with two differences:
  31         aliasing is a problem, and the write access has unknown alignment.  */
  32
  33 __attribute__ ((noinline)) int
  34 main1 ()
  35 {
  36   int i;
  37   float a[N] __attribute__ ((__aligned__(16)));
  38   float b[N] __attribute__ ((__aligned__(16))) = {0,3,6,9,12,15,18,21,24,27,30,33,36,39,42,45,48,51,54,57};
  39   float c[N] __attribute__ ((__aligned__(16))) = {0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19};
  40   float *pa = a;
  41   float *pb = b;
  42   float *pc = c;
  43
  44   for (i = 0; i < N/2; i++)
  45     {
  46       pa[i] = pb[i+1] * pc[i+1];
  47     }
  48
  49   /* check results:  */
  50   for (i = 0; i < N/2; i++)
  51     {
  52       if (pa[i] != (pb[i+1] * pc[i+1]))
  53         abort ();
  54     }
  55
  56   return 0;
  57 }
  58
  59 int main (void)
  60 {
  61   int i;
  62
  63   check_vect ();
  64   main1 ();
  65
  66   return 0;
  67 }
  68
  69 /* { dg-final { scan-tree-dump-times "vectorized 1 loops" 1 "vect" { xfail vect_no_align } } } */
  70 /* { dg-final { scan-tree-dump-times "Vectorizing an unaligned access" 2 "vect" { xfail vect_no_align } } } */
  71 /* { dg-final { scan-tree-dump-times "Alignment of access forced using peeling" 0 "vect" } } */
  72 /* { dg-final { cleanup-tree-dump "vect" } } */