gcc/testsuite/gcc.dg/tree-ssa/loop-19.c

   1 /* This tests strength reduction and choice of induction variables.  The targets
   2    for this testcase are quite limited, as with different set of available
   3    addressing modes, the results may be quite different.
   4
   5    The testcase comes from PR 29256 (and originally, the stream benchmark).  */
   6
   7 /* { dg-do compile { target i?86-*-* x86_64-*-* powerpc*-*-*} } */
   8 /* { dg-options "-O3 -fdump-tree-final_cleanup" } */
   9
  10 # define N      2000000
  11 static double   a[N],c[N];
  12 void tuned_STREAM_Copy()
  13 {
  14   int j;
  15   for (j=0; j<N; j++)
  16     c[j] = a[j];
  17 }
  18
  19 /* Check that the memory references are based on &a and &c, with appropriate
  20    offsets.  Ideally, we would want each of them to appear once in the output.
  21    However, due to a bug in jump threading, we end up peeling one iteration from
  22    the loop, which creates an additional occurence.  */
  23
  24 /* { dg-final { scan-tree-dump-times "MEM.(base: &|symbol: )a," 2 "final_cleanup" } } */
  25 /* { dg-final { scan-tree-dump-times "MEM.(base: &|symbol: )c," 2 "final_cleanup" } } */
  26
  27 /* { dg-final { cleanup-tree-dump "final_cleanup" } } */