gcc-4_9/gcc/testsuite/gcc.dg/pr64277.c

   1 /* PR tree-optimization/64277 */
   2 /* { dg-do compile } */
   3 /* { dg-options "-O3 -Wall -Werror -fdump-tree-cunroll-details" } */
   4 /* { dg-final { scan-tree-dump "loop with 5 iterations completely unrolled" "cunroll" } } */
   5 /* { dg-final { scan-tree-dump "loop with 6 iterations completely unrolled" "cunroll" } } */
   6 /* { dg-final { cleanup-tree-dump "cunroll" } } */
   7
   8 int f1[10];
   9 void test1 (short a[], short m, unsigned short l)
  10 {
  11   int i = l;
  12   for (i = i + 5; i < m; i++)
  13     f1[i] = a[i]++;
  14 }
  15
  16 void test2 (short a[], short m, short l)
  17 {
  18   int i;
  19   if (m > 5)
  20     m = 5;
  21   for (i = m; i > l; i--)
  22     f1[i] = a[i]++;
  23 }