From bf44ecccdb8c723983a6e7c6dc8874e65cab3c2b Mon Sep 17 00:00:00 2001
From: Chris Lattner <sabre@nondot.org>
Date: Mon, 2 Jun 2003 17:25:46 +0000
Subject: [PATCH] Fix bug: Linker/2003-06-02-TypeResolveProblem.ll

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@6542 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/VMCore/Constants.cpp | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/lib/VMCore/Constants.cpp b/lib/VMCore/Constants.cpp
index 8fa5342ff3b..5c2f73e0017 100644
--- a/lib/VMCore/Constants.cpp
+++ b/lib/VMCore/Constants.cpp
@@ -556,6 +556,7 @@ void ConstantArray::destroyConstant() {
 void ConstantArray::refineAbstractType(const DerivedType *OldTy,
                                        const Type *NewTy) {
   Value::refineAbstractType(OldTy, NewTy);
+  if (OldTy == NewTy) return;
 
   // Make everyone now use a constant of the new type...
   std::vector<Constant*> C;
@@ -625,6 +626,7 @@ void ConstantStruct::destroyConstant() {
 void ConstantStruct::refineAbstractType(const DerivedType *OldTy,
                                         const Type *NewTy) {
   Value::refineAbstractType(OldTy, NewTy);
+  if (OldTy == NewTy) return;
 
   // Make everyone now use a constant of the new type...
   std::vector<Constant*> C;
@@ -666,6 +668,7 @@ void ConstantPointerNull::destroyConstant() {
 void ConstantPointerNull::refineAbstractType(const DerivedType *OldTy,
                                              const Type *NewTy) {
   Value::refineAbstractType(OldTy, NewTy);
+  if (OldTy == NewTy) return;
 
   // Make everyone now use a constant of the new type...
   if (NewTy != OldTy) {
@@ -798,6 +801,7 @@ void ConstantExpr::destroyConstant() {
 void ConstantExpr::refineAbstractType(const DerivedType *OldTy,
                                       const Type *NewTy) {
   Value::refineAbstractType(OldTy, NewTy);
+  if (OldTy == NewTy) return;
 
   // FIXME: These need to use a lower-level implementation method, because the
   // ::get methods intuit the type of the result based on the types of the
-- 
2.34.1