gcc/testsuite/gcc.target/powerpc/vsx-vectorize-3.c

   1 /* { dg-do compile { target { powerpc*-*-* && lp64 } } } */
   2 /* { dg-skip-if "" { powerpc*-*-darwin* } } */
   3 /* { dg-require-effective-target powerpc_vsx_ok } */
   4 /* { dg-skip-if "do not override -mcpu" { powerpc*-*-* } { "-mcpu=*" } { "-mcpu=power7" } } */
   5 /* { dg-options "-mcpu=power7 -O2 -ftree-vectorize -fno-vect-cost-model -fdump-tree-vect-details" } */
   6
   7 /* Taken from vect/vect-95.c.  */
   8 #include <stdlib.h>
   9 #include <stdarg.h>
  10
  11 #define N 256
  12
  13 __attribute__ ((noinline))
  14 void bar (short *pa, short *pb, short *pc)
  15 {
  16   int i;
  17
  18   /* check results:  */
  19   for (i = 0; i < N; i++)
  20     {
  21       if (pa[i] != (pb[i] * pc[i]))
  22         abort ();
  23     }
  24
  25   return;
  26 }
  27
  28
  29 __attribute__ ((noinline)) int
  30 main1 (int n, short * __restrict__ pa, short * __restrict__ pb, short * __restrict__ pc)
  31 {
  32   int i;
  33
  34   for (i = 0; i < n; i++)
  35     {
  36       pa[i] = pb[i] * pc[i];
  37     }
  38
  39   bar (pa,pb,pc);
  40
  41   return 0;
  42 }
  43
  44 int main (void)
  45 {
  46   int i;
  47   short a[N] __attribute__ ((__aligned__(__BIGGEST_ALIGNMENT__)));
  48   short b[N] = {0,3,6,9,12,15,18,21,24,27,30,33,36,39,42,45,48,51,54,57};
  49   short c[N] = {0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19};
  50
  51   main1 (N,a,b,c);
  52   main1 (N-2,a,b,c);
  53
  54   return 0;
  55 }
  56
  57 /* { dg-final { scan-tree-dump-times "vectorized 1 loops" 1 "vect" } } */
  58 /* { dg-final { scan-tree-dump-times "Alignment of access forced using peeling" 1 "vect" } } */
  59 /* { dg-final { scan-tree-dump-times "Alignment of access forced using versioning" 0 "vect" } } */
  60 /* { dg-final { scan-tree-dump-times "Vectorizing an unaligned access" 2 "vect" } } */