gcc/testsuite/gcc.dg/tree-ssa/loop-28.c

   1 /* { dg-do compile { target { { i?86-*-* x86_64-*-* } && ia32 } } } */
   2 /* { dg-options "-O2 -fprefetch-loop-arrays -march=athlon -fdump-tree-optimized -fdump-tree-aprefetch --param max-unrolled-insns=1000" } */
   3
   4 char x[100000];
   5
   6 void foo(int n)
   7 {
   8   int i;
   9
  10   for (i = 0; i < n; i++)
  11     x[i] = (char) i;
  12 }
  13
  14 /* There should be 64 MEMs in the unrolled loop and one more in the copy of the loop
  15    for the rest of the iterations.  */
  16
  17 /* { dg-final { scan-tree-dump-times "MEM" 65 "optimized" } } */
  18
  19 /* There should be no i_a = i_b assignments.  */
  20 /* { dg-final { scan-tree-dump-times "i_.*= i_\[0-9\]*;" 0 "aprefetch" } } */
  21
  22 /* { dg-final { cleanup-tree-dump "optimized" } } */
  23 /* { dg-final { cleanup-tree-dump "aprefetch" } } */