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      1 // RUN: %clang_cc1 -emit-llvm %s  -o /dev/null
      2 
      3 int printf(const char *, ...);
      4 int foo();
      5 
      6 int main() {
      7   while (foo()) {
      8      switch (foo()) {
      9      case 0:
     10      case 1:
     11      case 2:
     12      case 3:
     13        printf("3");
     14      case 4: printf("4");
     15      case 5:
     16      case 6:
     17      default:
     18        break;
     19      }
     20    }
     21    return 0;
     22 }
     23