From: Jay Foad <jay.foad@gmail.com>
Date: Fri, 15 Jan 2010 08:32:58 +0000 (+0000)
Subject: Fix http://llvm.org/PR6028, an assertion failure when an UndefValue of
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=5b3701256c6706182ebfaeed8d50a66c6afe2a40;p=oota-llvm.git

Fix 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 c466400393e..89c4290f234 100644
--- a/lib/ExecutionEngine/ExecutionEngine.cpp
+++ b/lib/ExecutionEngine/ExecutionEngine.cpp
@@ -491,8 +491,22 @@ void *ExecutionEngine::getPointerToGlobal(const GlobalValue *GV) {
 /// @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)) {