From: David Blaikie <dblaikie@gmail.com>
Date: Wed, 13 May 2015 18:35:29 +0000 (+0000)
Subject: [opaque pointer type] Constant Folding: Use GEPOperator to access the pointee source... 
X-Git-Url: http://plrg.eecs.uci.edu/git/?p=oota-llvm.git;a=commitdiff_plain;h=428e9d76082e8cb8e08e4c9b8533f0ca0f715cdc

[opaque pointer type] Constant Folding: Use GEPOperator to access the pointee source type rather than going through the first operand's pointer type

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@237274 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/lib/IR/ConstantFold.cpp b/lib/IR/ConstantFold.cpp
index 8afb3e489de..ec3414d2530 100644
--- a/lib/IR/ConstantFold.cpp
+++ b/lib/IR/ConstantFold.cpp
@@ -632,8 +632,8 @@ Constant *llvm::ConstantFoldCastInstruction(unsigned opc, Constant *V,
     if (ConstantExpr *CE = dyn_cast<ConstantExpr>(V))
       if (CE->getOpcode() == Instruction::GetElementPtr &&
           CE->getOperand(0)->isNullValue()) {
-        Type *Ty =
-          cast<PointerType>(CE->getOperand(0)->getType())->getElementType();
+        GEPOperator *GEPO = cast<GEPOperator>(CE);
+        Type *Ty = GEPO->getSourceElementType();
         if (CE->getNumOperands() == 2) {
           // Handle a sizeof-like expression.
           Constant *Idx = CE->getOperand(1);