More explicit keywords.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40673 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Transforms/Scalar/CodeGenPrepare.cpp b/lib/Transforms/Scalar/CodeGenPrepare.cpp
index 2969df3..ddc0007 100644
--- a/lib/Transforms/Scalar/CodeGenPrepare.cpp
+++ b/lib/Transforms/Scalar/CodeGenPrepare.cpp
@@ -40,8 +40,8 @@
     const TargetLowering *TLI;
   public:
     static char ID; // Pass identification, replacement for typeid
-    CodeGenPrepare(const TargetLowering *tli = 0) : FunctionPass((intptr_t)&ID),
-      TLI(tli) {}
+    explicit CodeGenPrepare(const TargetLowering *tli = 0)
+      : FunctionPass((intptr_t)&ID), TLI(tli) {}
     bool runOnFunction(Function &F);
     
   private: