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      1 // RUN: %clang_cc1 -emit-llvm -o - %s | FileCheck %s
      2 
      3 int bork(unsigned long long x) {
      4   // CHECK: llvm.cttz.i64
      5   // CHECK: llvm.cttz.i64
      6   // CHECK-NOT: lshr
      7   return __builtin_ctzll(x);
      8 }
      9