gcc/testsuite/gcc.dg/tree-ssa/loop-18.c

   1 /* A test for # of iterations estimation.  We know that I does not overflow,
   2    thus we can perform strength reduction (even though the 32-bit variable
   3    i is first extended to 64-bit type).  */
   4
   5 /* { dg-options "-O2 -fdump-tree-optimized" } */
   6 /* { dg-do compile { target x86_64-*-* } } */
   7
   8 unsigned bar(void);
   9
  10 void foo(unsigned *p, unsigned n)
  11 {
  12   unsigned i;
  13
  14   for (i = 0; i < n; i++)
  15     p[i] = bar ();
  16 }
  17
  18 /* Check that the memory reference was replaced with MEM, and that there is no
  19    multiplication.  */
  20
  21 /* { dg-final { scan-tree-dump-times "MEM" 1 "optimized" } } */
  22 /* { dg-final { scan-tree-dump-times "\[^\\n\\r\]*= \\* " 0 "optimized" } } */
  23
  24 /* { dg-final { cleanup-tree-dump "optimized" } } */