gcc/testsuite/gcc.c-torture/compile/pr70199.c

   1 static volatile int v = 0;
   2 static
   3 void benchmark(long runs) {
   4   void* labels[] = {
   5     &&l0, &&l1, &&l2
   6   };
   7   for(unsigned int mask = 0x1F; mask > 0; mask >>= 1) {
   8     unsigned lfsr = 0xACE1u;
   9     long n = 10000000;
  10     while(n > 0) {
  11       l2: v;
  12       l1: v;
  13       goto *labels[lfsr & mask];
  14       l0: n--;
  15     }
  16   }
  17 }
  18 int f(void) {
  19   benchmark(10000000);
  20 }