gcc/testsuite/gcc.dg/loop-unswitch-6.c

   1 /* { dg-do compile } */
   2 /* { dg-options "-O2 -funswitch-loops -g -fdump-tree-unswitch-details" } */
   3 /* { dg-additional-options "-fcompare-debug" { target { ! powerpc-ibm-aix* } } } */
   4
   5 short a, d;
   6 int b, c;
   7 static int e() {
   8   int f = -2L, g = 9, h = 0;
   9   for (; h < 2; h++)
  10     if (a <= 5) {
  11       g = 0;
  12       if (c && a)
  13         break;
  14       if (c - 1)
  15         goto i;
  16     }
  17   if (b) {
  18     int *j[] = {&f};
  19     if (d)
  20       for (; f < 9; f++)
  21         if (g)
  22           for (; f; f++)
  23             ;
  24   i:
  25     while (f) {
  26       a--;
  27       break;
  28     }
  29   }
  30 }
  31 int main() { e(); }
  32
  33 /* { dg-final { scan-tree-dump-times "Guard hoisted" 1 "unswitch" } } */