gcc/testsuite/gcc.dg/vect/vect-outer-fir-lb.c

   1 /* { dg-require-effective-target vect_float } */
   2
   3 #include <stdarg.h>
   4 #include "tree-vect.h"
   5
   6 #define N 40
   7 #define M 64
   8 float in[N+M];
   9 float coeff[M];
  10 float out[N];
  11 float fir_out[N];
  12
  13 /* Should be vectorized. Fixed misaligment in the inner-loop.  */
  14 /* Currently not vectorized because the loop-count for the inner-loop
  15    has a maybe_zero component. Will be fixed when we incorporate the
  16    "cond_expr in rhs" patch.  */
  17 __attribute__ ((noinline))
  18 void foo (){
  19  int i,j,k;
  20  float diff;
  21
  22  for (i = 0; i < N; i++) {
  23   out[i] = 0;
  24  }
  25
  26  for (k = 0; k < 4; k++) {
  27   for (i = 0; i < N; i++) {
  28     diff = 0;
  29     j = k;
  30
  31     do {
  32       diff += in[j+i]*coeff[j];
  33       j+=4;
  34     } while (j < M);
  35
  36     out[i] += diff;
  37   }
  38  }
  39
  40 }
  41
  42 /* Vectorized. Changing misalignment in the inner-loop.  */
  43 __attribute__ ((noinline))
  44 void fir (){
  45   int i,j,k;
  46   float diff;
  47
  48   for (i = 0; i < N; i++) {
  49     diff = 0;
  50     for (j = 0; j < M; j++) {
  51       diff += in[j+i]*coeff[j];
  52     }
  53     fir_out[i] = diff;
  54   }
  55 }
  56
  57
  58 int main (void)
  59 {
  60   check_vect ();
  61   int i, j;
  62   float diff;
  63
  64   for (i = 0; i < M; i++)
  65     coeff[i] = i;
  66   for (i = 0; i < N+M; i++)
  67     in[i] = i;
  68
  69   foo ();
  70   fir ();
  71
  72   for (i = 0; i < N; i++) {
  73     if (out[i] != fir_out[i])
  74       abort ();
  75   }
  76
  77   return 0;
  78 }
  79
  80 /* { dg-final { scan-tree-dump-times "OUTER LOOP VECTORIZED" 2 "vect" { xfail *-*-* } } } */
  81 /* { dg-final { scan-tree-dump-times "OUTER LOOP VECTORIZED" 1 "vect" { xfail vect_no_align } } } */
  82 /* { dg-final { cleanup-tree-dump "vect" } } */