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      1 // RUN: %clang_cc1  %s -w -emit-llvm -o -
      2 
      3 float test(int X, ...) {
      4   __builtin_va_list ap;
      5   float F;
      6   __builtin_va_start(ap, X);
      7   F = __builtin_va_arg(ap, float);
      8   return F;
      9 }
     10