From 7553c341354c7790cebda40ea0d647f9d204544b Mon Sep 17 00:00:00 2001
From: Reid Spencer <rspencer@reidspencer.com>
Date: Tue, 6 Mar 2007 03:41:50 +0000
Subject: [PATCH] Fix a bug in IntToPtr. Truncating to 64-bits only works if
 the integer is larger. Adjust so that it truncates to pointer width, only if
 necessary.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@34954 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/ExecutionEngine/Interpreter/Execution.cpp | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/lib/ExecutionEngine/Interpreter/Execution.cpp b/lib/ExecutionEngine/Interpreter/Execution.cpp
index 76104b9440c..4a0c58906a5 100644
--- a/lib/ExecutionEngine/Interpreter/Execution.cpp
+++ b/lib/ExecutionEngine/Interpreter/Execution.cpp
@@ -1058,7 +1058,11 @@ GenericValue Interpreter::executeIntToPtrInst(Value *SrcVal, const Type *DstTy,
   GenericValue Dest, Src = getOperandValue(SrcVal, SF);
   assert(isa<PointerType>(DstTy) && "Invalid PtrToInt instruction");
 
-  Dest.PointerVal = (PointerTy) Src.IntVal.trunc(64).getZExtValue();
+  uint32_t PtrSize = TD.getPointerSize();
+  if (PtrSize != Src.IntVal.getBitWidth())
+    Src.IntVal = Src.IntVal.trunc(PtrSize);
+
+  Dest.PointerVal = (PointerTy) Src.IntVal.getZExtValue();
   return Dest;
 }