gcc/testsuite/gcc.dg/unroll-6.c

   1 /* { dg-do compile } */
   2 /* { dg-options "-O3 -fdump-rtl-loop2_unroll -funroll-loops" } */
   3 /* { dg-require-effective-target int32plus } */
   4
   5 void abort (void);
   6 int *a;
   7 /* Fails on MIPS16 because equality checks are implemented using XOR.
   8    It's unlikely MIPS16 users would want unrolling anyway.  */
   9 #ifdef __mips
  10 __attribute__((nomips16))
  11 #endif
  12 int t()
  13 {
  14    int i;
  15   for (i=0;i<1000000;i++)
  16     if (a[i])
  17       return 1;
  18   return 0;
  19 }
  20 #ifdef __mips
  21 __attribute__((nomips16))
  22 #endif
  23 int t2()
  24 {
  25    int i;
  26   for (i=0;i<3000000;i++)
  27     if (a[i])
  28         abort ();
  29   return 0;
  30 }
  31 /* { dg-final { scan-rtl-dump-times "  upper bound: 999999" 1 "loop2_unroll" } } */
  32 /* { dg-final { scan-rtl-dump-not "realistic bound: 999999" "loop2_unroll" } } */
  33 /* { dg-final { scan-rtl-dump-times "  upper bound: 2999999" 1 "loop2_unroll" } } */
  34 /* { dg-final { scan-rtl-dump-times "realistic bound: 2999999" 1 "loop2_unroll" } } */