Fix a regression in my previous patch, fixing GlobalOpt/2005-09-27-Crash.ll

and PR632.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23484 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/Transforms/IPO/GlobalOpt.cpp b/lib/Transforms/IPO/GlobalOpt.cpp
index 3b2eee053140ec5337117a6b4352d044190952cf..839d7769ef7237ee7aec846488a241901fa81dd7 100644 (file)
--- a/lib/Transforms/IPO/GlobalOpt.cpp
+++ b/lib/Transforms/IPO/GlobalOpt.cpp
@@ -337,7 +337,7 @@ static bool CleanupConstantGlobalUsers(Value *V, Constant *Init) {
       Constant *SubInit = 0;
       ConstantExpr *CE = 
         dyn_cast_or_null<ConstantExpr>(ConstantFoldInstruction(GEP));
-      if (CE && CE->getOpcode() == Instruction::GetElementPtr)
+      if (Init && CE && CE->getOpcode() == Instruction::GetElementPtr)
         SubInit = ConstantFoldLoadThroughGEPConstantExpr(Init, CE);
       Changed |= CleanupConstantGlobalUsers(GEP, SubInit);