[llvm] r237274 - [opaque pointer type] Constant Folding: Use GEPOperator to access the pointee source type rather than going through the first operand's pointer type

[David Blaikie]

Author: dblaikie
Date: Wed May 13 13:35:29 2015
New Revision: 237274

URL: http://llvm.org/viewvc/llvm-project?rev=237274&view=rev
Log:
[opaque pointer type] Constant Folding: Use GEPOperator to access the pointee source type rather than going through the first operand's pointer type

Modified:
    llvm/trunk/lib/IR/ConstantFold.cpp

Modified: llvm/trunk/lib/IR/ConstantFold.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/IR/ConstantFold.cpp?rev=237274&r1=237273&r2=237274&view=diff
==============================================================================
--- llvm/trunk/lib/IR/ConstantFold.cpp (original)
+++ llvm/trunk/lib/IR/ConstantFold.cpp Wed May 13 13:35:29 2015
@@ -632,8 +632,8 @@ Constant *llvm::ConstantFoldCastInstruct
     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);