[10/9] Add tests for stride-3 accesses

This patch adds a test for stride-3 accesses.  I didn't add any
particularly complicated cases because I think the testsuite already
covers the interaction between the strided loads & stores and other
operations pretty well.  Let me know if there's something I should
add though.

Tested on x86_64-linux-gnu and arm-linux-gnueabi.  OK to install?

Richard


gcc/testsuite/
	* gcc.dg/vect/vect-strided-u16-i3.c: New test.

On Tue, Apr 12, 2011 at 4:34 PM, Richard Sandiford
<richard.sandiford@linaro.org> wrote:
> This patch adds a test for stride-3 accesses.  I didn't add any
> particularly complicated cases because I think the testsuite already
> covers the interaction between the strided loads & stores and other
> operations pretty well.  Let me know if there's something I should
> add though.
>
> Tested on x86_64-linux-gnu and arm-linux-gnueabi.  OK to install?

Ok.

Thanks,
Richard.

> Richard
>
>
> gcc/testsuite/
>        * gcc.dg/vect/vect-strided-u16-i3.c: New test.
>
> Index: gcc/testsuite/gcc.dg/vect/vect-strided-u16-i3.c
> ===================================================================
> --- /dev/null   2011-03-23 08:42:11.268792848 +0000
> +++ gcc/testsuite/gcc.dg/vect/vect-strided-u16-i3.c     2011-04-12 11:55:17.000000000 +0100
> @@ -0,0 +1,112 @@
> +#include <stdarg.h>
> +#include "tree-vect.h"
> +
> +#define N 128
> +
> +typedef struct {
> +   unsigned short a;
> +   unsigned short b;
> +   unsigned short c;
> +} s;
> +
> +#define A(I) (I)
> +#define B(I) ((I) * 2)
> +#define C(I) ((unsigned short) ~((I) ^ 0x18))
> +
> +void __attribute__ ((noinline))
> +check1 (s *res)
> +{
> +  int i;
> +
> +  for (i = 0; i < N; i++)
> +    if (res[i].a != C (i)
> +       || res[i].b != A (i)
> +       || res[i].c != B (i))
> +      abort ();
> +}
> +
> +void __attribute__ ((noinline))
> +check2 (unsigned short *res)
> +{
> +  int i;
> +
> +  for (i = 0; i < N; i++)
> +    if (res[i] != (unsigned short) (A (i) + B (i) + C (i)))
> +      abort ();
> +}
> +
> +void __attribute__ ((noinline))
> +check3 (s *res)
> +{
> +  int i;
> +
> +  for (i = 0; i < N; i++)
> +    if (res[i].a != i
> +       || res[i].b != i
> +       || res[i].c != i)
> +      abort ();
> +}
> +
> +void __attribute__ ((noinline))
> +check4 (unsigned short *res)
> +{
> +  int i;
> +
> +  for (i = 0; i < N; i++)
> +    if (res[i] != (unsigned short) (A (i) + B (i)))
> +      abort ();
> +}
> +
> +void __attribute__ ((noinline))
> +main1 (s *arr)
> +{
> +  int i;
> +  s *ptr = arr;
> +  s res1[N];
> +  unsigned short res2[N];
> +
> +  for (i = 0; i < N; i++)
> +    {
> +      res1[i].a = arr[i].c;
> +      res1[i].b = arr[i].a;
> +      res1[i].c = arr[i].b;
> +    }
> +  check1 (res1);
> +
> +  for (i = 0; i < N; i++)
> +    res2[i] = arr[i].a + arr[i].b + arr[i].c;
> +  check2 (res2);
> +
> +  for (i = 0; i < N; i++)
> +    {
> +      res1[i].a = i;
> +      res1[i].b = i;
> +      res1[i].c = i;
> +    }
> +  check3 (res1);
> +
> +  for (i = 0; i < N; i++)
> +    res2[i] = arr[i].a + arr[i].b;
> +  check4 (res2);
> +}
> +
> +int main (void)
> +{
> +  int i;
> +  s arr[N];
> +
> +  check_vect ();
> +
> +  for (i = 0; i < N; i++)
> +    {
> +      arr[i].a = A (i);
> +      arr[i].b = B (i);
> +      arr[i].c = C (i);
> +    }
> +  main1 (arr);
> +
> +  return 0;
> +}
> +
> +/* { dg-final { scan-tree-dump-times "vectorized 4 loops" 1 "vect"  { target vect_strided3 } } } */
> +/* { dg-final { cleanup-tree-dump "vect" } } */
>