3 files changed, 12 insertions, 6 deletions
diff --git a/include/llvm/ADT/IntervalMap.h b/include/llvm/ADT/IntervalMap.h
index c4083ee..44a61ff 100644
--- a/include/llvm/ADT/IntervalMap.h
+++ b/include/llvm/ADT/IntervalMap.h
@@ -496,7 +496,7 @@ public:
   NodeRef() {}
 
   /// operator bool - Detect a null ref.
-  operator bool() const { return pip.getOpaqueValue(); }
+  LLVM_EXPLICIT operator bool() const { return pip.getOpaqueValue(); }
 
   /// NodeRef - Create a reference to the node p with n elements.
   template <typename NodeT>
diff --git a/include/llvm/ADT/OwningPtr.h b/include/llvm/ADT/OwningPtr.h
index 86f9fee..6b9e42e 100644
--- a/include/llvm/ADT/OwningPtr.h
+++ b/include/llvm/ADT/OwningPtr.h
@@ -70,8 +70,9 @@ public:
 
   T *operator->() const { return Ptr; }
   T *get() const { return Ptr; }
-  operator bool() const { return Ptr != 0; }
+  LLVM_EXPLICIT operator bool() const { return Ptr != 0; }
   bool operator!() const { return Ptr == 0; }
+  bool isValid() const { return Ptr != 0; }
 
   void swap(OwningPtr &RHS) {
     T *Tmp = RHS.Ptr;
@@ -132,7 +133,7 @@ public:
   }
 
   T *get() const { return Ptr; }
-  operator bool() const { return Ptr != 0; }
+  LLVM_EXPLICIT operator bool() const { return Ptr != 0; }
   bool operator!() const { return Ptr == 0; }
 
   void swap(OwningArrayPtr &RHS) {
diff --git a/include/llvm/ADT/PointerUnion.h b/include/llvm/ADT/PointerUnion.h
index f42515a..b63ee52 100644
--- a/include/llvm/ADT/PointerUnion.h
+++ b/include/llvm/ADT/PointerUnion.h
@@ -109,7 +109,7 @@ namespace llvm {
       // we recursively strip off low bits if we have a nested PointerUnion.
       return !PointerLikeTypeTraits<PT1>::getFromVoidPointer(Val.getPointer());
     }
-    operator bool() const { return !isNull(); }
+    LLVM_EXPLICIT operator bool() const { return !isNull(); }
 
     /// is<T>() return true if the Union currently holds the type matching T.
     template<typename T>
@@ -174,6 +174,11 @@ namespace llvm {
       return V;
     }
   };
+
+  template<typename PT1, typename PT2>
+  bool operator==(PointerUnion<PT1, PT2> lhs, PointerUnion<PT1, PT2> rhs) {
+    return lhs.getOpaqueValue() == rhs.getOpaqueValue();
+  }
   
   // Teach SmallPtrSet that PointerUnion is "basically a pointer", that has
   // # low bits available = min(PT1bits,PT2bits)-1.
@@ -251,7 +256,7 @@ namespace llvm {
     /// isNull - Return true if the pointer held in the union is null,
     /// regardless of which type it is.
     bool isNull() const { return Val.isNull(); }
-    operator bool() const { return !isNull(); }
+    LLVM_EXPLICIT operator bool() const { return !isNull(); }
     
     /// is<T>() return true if the Union currently holds the type matching T.
     template<typename T>
@@ -359,7 +364,7 @@ namespace llvm {
     /// isNull - Return true if the pointer held in the union is null,
     /// regardless of which type it is.
     bool isNull() const { return Val.isNull(); }
-    operator bool() const { return !isNull(); }
+    LLVM_EXPLICIT operator bool() const { return !isNull(); }
     
     /// is<T>() return true if the Union currently holds the type matching T.
     template<typename T>