gcc/testsuite/gcc.dg/tree-ssa/ivopt_infer_2.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 extern char a[];
   9
  10 /* Can not infer loop iteration from array -- exit test can not be
  11    replaced by the array address.  */
  12 void foo (unsigned int i_width, TYPE dst)
  13 {
  14   unsigned long long i = 0;
  15   unsigned long long j = 0;
  16   for ( ; j < i_width; )
  17     {
  18       *dst = a[i];
  19       dst++;
  20       i += 2;
  21       j += 1;
  22     }
  23 }
  24
  25 /* { dg-final { scan-tree-dump-times "\[^:\]*if \\(.*j_\[0-9\]+.*\\)" 1 "ivopts"} } */