gcc/testsuite/g++.dg/tree-ssa/pr19807.C

   1 /* { dg-do compile } */
   2 /* { dg-options "-O -fdump-tree-optimized" } */
   3
   4 int a[4];
   5 int *x, *y, *z;
   6
   7 void foo(void)
   8 {
   9         x = &a[3] - 1;
  10         y = &a[1] + 1;
  11         z = 1 + &a[1];
  12 }
  13
  14 void bar(int i)
  15 {
  16         x = &a[i] - 1;
  17         y = &a[i] + 1;
  18         z = 1 + &a[i];
  19 }
  20
  21 /* { dg-final { scan-tree-dump-times "&a\\\[2\\\]" 3 "optimized" } } */
  22 /* { dg-final { scan-tree-dump-times "&a\\\[.* \\+ -1\\\]" 1 "optimized" } } */
  23 /* { dg-final { scan-tree-dump-times "&a\\\[.* \\+ 1\\\]" 1 "optimized" } } */
  24 /* { dg-final { cleanup-tree-dump "optimized" } } */