gcc/testsuite/gcc.dg/tree-ssa/ivopt_infer_1.c

   1 /* { dg-do compile { target {{ i?86-*-* x86_64-*-* } && lp64 } } } */
   2 /* { dg-options "-O2 -m64 -fdump-tree-ivopts-details" } */
   3
   4 #ifndef TYPE
   5 #define TYPE char*
   6 #endif
   7
   8 int a[400];
   9
  10 /* Testing inferred loop iteration from array -- exit test can be replaced.  */
  11 void foo (int i_width, TYPE dst, TYPE src1, TYPE src2)
  12 {
  13       TYPE dstn= dst + i_width;
  14       TYPE dst0 = dst;
  15       unsigned long long i = 0;
  16        for( ; dst <= dstn; )
  17        {
  18            dst0[i] = ( src1[i] + src2[i] + 1 +a[i]) >> 1;
  19            dst++;
  20            i += 16;
  21        }
  22 }
  23
  24 /* { dg-final { scan-tree-dump-times "Replacing" 1 "ivopts"} } */