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

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@128534 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 4 insertions, 0 deletions

diff --git a/lib/CodeGen/CGObjCGNU.cpp b/lib/CodeGen/CGObjCGNU.cpp
index bea6f3a94c..8611c5f910 100644
--- a/lib/CodeGen/CGObjCGNU.cpp
+++ b/lib/CodeGen/CGObjCGNU.cpp
@@ -1145,6 +1145,7 @@ CGObjCGNU::GenerateMessageSend(CodeGenFunction &CGF,
     if (msgRet.isScalar()) {
       llvm::Value *v = msgRet.getScalarVal();
       llvm::PHINode *phi = Builder.CreatePHI(v->getType());
+      phi->reserveOperandSpace(2);
       phi->addIncoming(v, messageBB);
       phi->addIncoming(llvm::Constant::getNullValue(v->getType()), startBB);
       msgRet = RValue::get(phi);
@@ -1156,16 +1157,19 @@ CGObjCGNU::GenerateMessageSend(CodeGenFunction &CGF,
           CGF.CreateTempAlloca(RetTy->getElementType(), "null");
       CGF.InitTempAlloca(NullVal,
           llvm::Constant::getNullValue(RetTy->getElementType()));
+      phi->reserveOperandSpace(2);
       phi->addIncoming(v, messageBB);
       phi->addIncoming(NullVal, startBB);
       msgRet = RValue::getAggregate(phi);
     } else /* isComplex() */ {
       std::pair<llvm::Value*,llvm::Value*> v = msgRet.getComplexVal();
       llvm::PHINode *phi = Builder.CreatePHI(v.first->getType());
+      phi->reserveOperandSpace(2);
       phi->addIncoming(v.first, messageBB);
       phi->addIncoming(llvm::Constant::getNullValue(v.first->getType()),
           startBB);
       llvm::PHINode *phi2 = Builder.CreatePHI(v.second->getType());
+      phi2->reserveOperandSpace(2);
       phi2->addIncoming(v.second, messageBB);
       phi2->addIncoming(llvm::Constant::getNullValue(v.second->getType()),
           startBB);