Fix http://llvm.org/PR6028, an assertion failure when an UndefValue of
integer type is used.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@93509 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/ExecutionEngine/ExecutionEngine.cpp b/lib/ExecutionEngine/ExecutionEngine.cpp
index c466400..89c4290 100644
--- a/lib/ExecutionEngine/ExecutionEngine.cpp
+++ b/lib/ExecutionEngine/ExecutionEngine.cpp
@@ -491,8 +491,22 @@
/// @brief Get a GenericValue for a Constant*
GenericValue ExecutionEngine::getConstantValue(const Constant *C) {
// If its undefined, return the garbage.
- if (isa<UndefValue>(C))
- return GenericValue();
+ if (isa<UndefValue>(C)) {
+ GenericValue Result;
+ switch (C->getType()->getTypeID()) {
+ case Type::IntegerTyID:
+ case Type::X86_FP80TyID:
+ case Type::FP128TyID:
+ case Type::PPC_FP128TyID:
+ // Although the value is undefined, we still have to construct an APInt
+ // with the correct bit width.
+ Result.IntVal = APInt(C->getType()->getPrimitiveSizeInBits(), 0);
+ break;
+ default:
+ break;
+ }
+ return Result;
+ }
// If the value is a ConstantExpr
if (const ConstantExpr *CE = dyn_cast<ConstantExpr>(C)) {