3 files changed, 5 insertions, 4 deletions
diff --git a/lib/CodeGen/CollectorMetadata.cpp b/lib/CodeGen/CollectorMetadata.cpp
index 57349390b0..43f3d431e9 100644
--- a/lib/CodeGen/CollectorMetadata.cpp
+++ b/lib/CodeGen/CollectorMetadata.cpp
@@ -30,7 +30,7 @@ namespace {
     std::ostream &OS;
     
   public:
-    Printer(std::ostream &OS = *cerr);
+    explicit Printer(std::ostream &OS = *cerr);
     
     const char *getPassName() const;
     void getAnalysisUsage(AnalysisUsage &AU) const;
diff --git a/lib/CodeGen/ELFWriter.cpp b/lib/CodeGen/ELFWriter.cpp
index efdf029c4a..d054adb9de 100644
--- a/lib/CodeGen/ELFWriter.cpp
+++ b/lib/CodeGen/ELFWriter.cpp
@@ -72,7 +72,7 @@ namespace llvm {
     std::vector<unsigned char> *OutBuffer;
     size_t FnStart;
   public:
-    ELFCodeEmitter(ELFWriter &ew) : EW(ew), TM(EW.TM), OutBuffer(0) {}
+    explicit ELFCodeEmitter(ELFWriter &ew) : EW(ew), TM(EW.TM), OutBuffer(0) {}
 
     void startFunction(MachineFunction &F);
     bool finishFunction(MachineFunction &F);
diff --git a/lib/CodeGen/SimpleRegisterCoalescing.h b/lib/CodeGen/SimpleRegisterCoalescing.h
index c3b2895663..fcdab4a518 100644
--- a/lib/CodeGen/SimpleRegisterCoalescing.h
+++ b/lib/CodeGen/SimpleRegisterCoalescing.h
@@ -48,7 +48,7 @@ namespace llvm {
   ///
   struct CopyRecSort : public std::binary_function<CopyRec,CopyRec,bool> {
     JoinPriorityQueue<CopyRecSort> *JPQ;
-    CopyRecSort(JoinPriorityQueue<CopyRecSort> *jpq) : JPQ(jpq) {}
+    explicit CopyRecSort(JoinPriorityQueue<CopyRecSort> *jpq) : JPQ(jpq) {}
     CopyRecSort(const CopyRecSort &RHS) : JPQ(RHS.JPQ) {}
     bool operator()(CopyRec left, CopyRec right) const;
   };
@@ -61,7 +61,8 @@ namespace llvm {
     std::priority_queue<CopyRec, std::vector<CopyRec>, SF> Queue;
 
   public:
-    JoinPriorityQueue(SimpleRegisterCoalescing *rc) : Rc(rc), Queue(SF(this)) {}
+    explicit JoinPriorityQueue(SimpleRegisterCoalescing *rc)
+      : Rc(rc), Queue(SF(this)) {}
 
     bool empty() const { return Queue.empty(); }
     void push(CopyRec R) { Queue.push(R); }