vect-42.c

来自「linux下编程用 编译软件」· C语言 代码 · 共 61 行

/* { dg-require-effective-target vect_float } */

#include <stdarg.h>
#include "tree-vect.h"

#define N 256

void bar (float *pa, float *pb, float *pc) 
{
  int i;

  /* check results:  */
  for (i = 0; i < N; i++)
    {
      if (pa[i] != (pb[i] * pc[i]))
	abort ();
    }

  return;
}

/* Unaligned write access, aligned read accesses.
   Since we are handling an unaligned store by peeling the loop,
   the loads will become unaligned.
   The loop bound is known and divisible by the vectorization factor.
   No aliasing problems.  */

int
main1 (float * __restrict__ pa)
{
  int i;
  float pb[N] __attribute__ ((__aligned__(16))) = {0,3,6,9,12,15,18,21,24,27,30,33,36,39,42,45,48,51,54,57};
  float pc[N] __attribute__ ((__aligned__(16))) = {0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19};

  for (i = 0; i < N; i++)
    {
      pa[i] = pb[i] * pc[i];
    }

  return 0;
}

int main (void)
{
  int i;
  float a[N] __attribute__ ((__aligned__(16)));
  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};
  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};

  check_vect ();

  main1 (a);
  bar (a,b,c);
  return 0;
}

/* { dg-final { scan-tree-dump-times "vectorized 1 loops" 1 "vect" { xfail vect_no_align } } } */
/* { dg-final { scan-tree-dump-times "Vectorizing an unaligned access" 2 "vect" { xfail vect_no_align } } } */
/* { dg-final { scan-tree-dump-times "Alignment of access forced using peeling" 1 "vect" { xfail vect_no_align } } } */
/* { dg-final { cleanup-tree-dump "vect" } } */