Cherry-pick part of LLVM SVN r265828
This fixes build failures with recent Clang
diff --git a/include/llvm/IR/ValueMap.h b/include/llvm/IR/ValueMap.h
index 4d00b63..7fddef4 100644
--- a/include/llvm/IR/ValueMap.h
+++ b/include/llvm/IR/ValueMap.h
@@ -99,7 +99,7 @@
explicit ValueMap(const ExtraData &Data, unsigned NumInitBuckets = 64)
: Map(NumInitBuckets), Data(Data) {}
- bool hasMD() const { return MDMap; }
+ bool hasMD() const { return bool(MDMap); }
MDMapT &MD() {
if (!MDMap)
MDMap.reset(new MDMapT);