(Almost) always call reserveOperandSpace() on newly created PHINodes.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@128535 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/tools/bugpoint/Miscompilation.cpp b/tools/bugpoint/Miscompilation.cpp
index 3a5f143..eb609a7 100644
--- a/tools/bugpoint/Miscompilation.cpp
+++ b/tools/bugpoint/Miscompilation.cpp
@@ -887,6 +887,7 @@
 
           PHINode *FuncPtr = PHINode::Create(NullPtr->getType(),
                                              "fp", DoCallBB);
+          FuncPtr->reserveOperandSpace(2);
           FuncPtr->addIncoming(CastedResolver, LookupBB);
           FuncPtr->addIncoming(CachedVal, EntryBB);