From 79e46acd35df36477029e9f534ab1a366a98df56 Mon Sep 17 00:00:00 2001
From: Nate Begeman <natebegeman@mac.com>
Date: Mon, 4 Apr 2005 00:57:08 +0000
Subject: [PATCH] Handle expanding arguments to ISD::TRUNCATE.  This happens on
 PowerPC when you have something like i16 = truncate i64.  This fixes
 Regression/C/casts

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21073 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/CodeGen/SelectionDAG/LegalizeDAG.cpp | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp b/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp
index 248c7bafd5d..492071adba7 100644
--- a/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp
+++ b/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp
@@ -1126,7 +1126,9 @@ SDOperand SelectionDAGLegalize::PromoteOp(SDOperand Op) {
       Result = PromoteOp(Node->getOperand(0));
       break;
     case Expand:
-      assert(0 && "Cannot handle expand yet");
+      ExpandOp(Node->getOperand(0), Tmp1, Tmp2);
+      // Truncate the low part of the expanded value to the result type
+      Result = DAG.getNode(ISD::TRUNCATE, VT, Tmp1); 
     }
     break;
   case ISD::SIGN_EXTEND: