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[/] [openrisc/] [trunk/] [gnu-src/] [gcc-4.5.1/] [gcc/] [testsuite/] [gcc.dg/] [vect/] [vect-reduc-dot-u8b.c] - Blame information for rev 298

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Line No. Rev Author Line
1 298 jeremybenn
/* { dg-require-effective-target vect_int } */
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#include <stdarg.h>
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#include "tree-vect.h"
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#define N 64
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#define DOT 43680
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unsigned char X[N] __attribute__ ((__aligned__(__BIGGEST_ALIGNMENT__))) = {0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48,49,50,51,52,53,54,55,56,57,58,59,60,61,62,63};
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unsigned char Y[N] __attribute__ ((__aligned__(__BIGGEST_ALIGNMENT__))) = {64,63,62,61,60,59,58,57,56,55,54,53,52,51,50,49,48,47,46,45,44,43,42,41,40,39,38,37,36,35,34,33,32,31,30,29,28,27,26,25,24,23,22,21,20,19,18,17,16,15,14,13,12,11,10,9,8,7,6,5,4,3,2,1};
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/* char->short->short dot product.
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   Detected as a dot-product pattern.
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   Should be vectorized on targets that support dot-product for unsigned chars,
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   but currently this test cannot be vectorized as a dot-product on targets
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   that support char->short->int dot-product.
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   Alternatively, this test can be vectorized using vect_widen_mult_qi (or
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   vect_unpack and non-widening multplication: vect_unpack && vect_short_mult).
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   */
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__attribute__ ((noinline)) unsigned short
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foo (int len) {
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  int i;
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  unsigned short result = 0;
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  for (i=0; i<len; i++) {
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    result += (unsigned short)(X[i] * Y[i]);
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  }
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  return result;
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}
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int main (void)
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{
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  unsigned short dot;
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  int i;
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  check_vect ();
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  dot = foo (N);
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  if (dot != DOT)
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    abort ();
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  return 0;
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}
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/* { dg-final { scan-tree-dump-times "vect_recog_dot_prod_pattern: detected" 1 "vect" } } */
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/* When the vectorizer is enhanced to vectorize accumulation into short for
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   targets that support accumulation into int (powerpc, ia64) we'd have:
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dg-final { scan-tree-dump-times "vectorized 1 loops" 1 "vect" { target vect_udot_qi || vect_widen_mult_qi_to_hi } }
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*/
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/* { dg-final { scan-tree-dump-times "vectorized 1 loops" 1 "vect" {target { vect_widen_mult_qi_to_hi || vect_unpack } } } } */
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/* { dg-final { cleanup-tree-dump "vect" } } */
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