gnu/dist/gcc4/gcc/testsuite/gcc.dg/vect/pr20122.c

   1 /* { dg-require-effective-target vect_int } */
   2
   3 #include <stdarg.h>
   4 #include "tree-vect.h"
   5
   6 short Kernshort[24] __attribute__ ((__aligned__(16)));
   7 static void VecBug(short Kernel[8][24]) __attribute__((noinline));
   8 static void VecBug2(short Kernel[8][24]) __attribute__((noinline));
   9
  10 /* Not vectorizable: Kernel may alias Kernshort - a global array.  */
  11 static void VecBug(short Kernel[8][24])
  12 {
  13   int k,i;
  14     for (k = 0; k<8; k++)
  15         for (i = 0; i<24; i++)
  16             Kernshort[i] = Kernel[k][i];
  17 }
  18
  19 /* Vectorizable: Kernshort2 is local.  */
  20 static void VecBug2(short Kernel[8][24])
  21 {
  22   int k,i;
  23   short Kernshort2[24] __attribute__ ((__aligned__(16)));
  24     for (k = 0; k<8; k++)
  25         for (i = 0; i<24; i++)
  26             Kernshort2[i] = Kernel[k][i];
  27
  28     for (k = 0; k<8; k++)
  29         for (i = 0; i<24; i++)
  30             if (Kernshort2[i] != Kernel[k][i])
  31                 abort ();
  32 }
  33
  34 int main (int argc, char **argv)
  35 {
  36     check_vect ();
  37
  38     short Kernel[8][24] __attribute__ ((__aligned__(16)));
  39     int k,i;
  40
  41     for (k = 0; k<8; k++)
  42         for (i = 0; i<24; i++)
  43             Kernel[k][i] = 0;
  44
  45     VecBug(Kernel);
  46     VecBug2(Kernel);
  47
  48     return 0;
  49 }
  50
  51
  52 /* { dg-final { scan-tree-dump-times "vectorized 1 loops" 2 "vect" { xfail vect_no_align} } } */
  53 /* { dg-final { cleanup-tree-dump "vect" } } */