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      1 // RUN: %clang_cc1 %s -emit-llvm-only
      2 // CHECK that we don't crash.
      3 
      4 int main(void){
      5 	int x = 12;
      6 	// Make sure we don't crash when constant folding the case 4
      7 	// statement due to the case 5 statement contained in the do loop
      8 	switch (4) {
      9 		case 4: do {
     10                      switch (6)  {
     11                        case 6: {
     12                          case 5: x++;
     13                        };
     14                      };
     15                 } while (x < 100);
     16 	}
     17 	return x;
     18 }
     19