More explicit keywords.

llvm-svn: 40673
diff --git a/llvm/lib/Transforms/Utils/LowerAllocations.cpp b/llvm/lib/Transforms/Utils/LowerAllocations.cpp
index 7ce2479..edc4c8a 100644
--- a/llvm/lib/Transforms/Utils/LowerAllocations.cpp
+++ b/llvm/lib/Transforms/Utils/LowerAllocations.cpp
@@ -37,7 +37,7 @@
     bool LowerMallocArgToInteger;
   public:
     static char ID; // Pass ID, replacement for typeid
-    LowerAllocations(bool LowerToInt = false)
+    explicit LowerAllocations(bool LowerToInt = false)
       : BasicBlockPass((intptr_t)&ID), MallocFunc(0), FreeFunc(0), 
         LowerMallocArgToInteger(LowerToInt) {}
 
diff --git a/llvm/lib/Transforms/Utils/LowerInvoke.cpp b/llvm/lib/Transforms/Utils/LowerInvoke.cpp
index 551ca7f..ba03635 100644
--- a/llvm/lib/Transforms/Utils/LowerInvoke.cpp
+++ b/llvm/lib/Transforms/Utils/LowerInvoke.cpp
@@ -76,8 +76,8 @@
     
   public:
     static char ID; // Pass identification, replacement for typeid
-    LowerInvoke(const TargetLowering *tli = NULL) : FunctionPass((intptr_t)&ID),
-      TLI(tli) { }
+    explicit LowerInvoke(const TargetLowering *tli = NULL)
+      : FunctionPass((intptr_t)&ID), TLI(tli) { }
     bool doInitialization(Module &M);
     bool runOnFunction(Function &F);
  
diff --git a/llvm/lib/Transforms/Utils/LowerSelect.cpp b/llvm/lib/Transforms/Utils/LowerSelect.cpp
index 1882695..317e84a 100644
--- a/llvm/lib/Transforms/Utils/LowerSelect.cpp
+++ b/llvm/lib/Transforms/Utils/LowerSelect.cpp
@@ -34,7 +34,7 @@
     bool OnlyFP;   // Only lower FP select instructions?
   public:
     static char ID; // Pass identification, replacement for typeid
-    LowerSelect(bool onlyfp = false) : FunctionPass((intptr_t)&ID), 
+    explicit LowerSelect(bool onlyfp = false) : FunctionPass((intptr_t)&ID), 
       OnlyFP(onlyfp) {}
 
     virtual void getAnalysisUsage(AnalysisUsage &AU) const {