From: Chris Lattner <sabre@nondot.org>
Date: Fri, 28 Jan 2005 06:27:38 +0000 (+0000)
Subject: CopyFromReg produces two values.  Make sure that we remember that both are
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=13c184de29c09294ed63b01ac43e1b46c049278e;p=oota-llvm.git

CopyFromReg produces two values.  Make sure that we remember that both are
legalized, and actually return the correct result when we legalize the chain first.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19866 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp b/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp
index 74f1c5526a0..b48c1b6aaba 100644
--- a/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp
+++ b/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp
@@ -206,7 +206,14 @@ SDOperand SelectionDAGLegalize::LegalizeOp(SDOperand Op) {
     if (Tmp1 != Node->getOperand(0))
       Result = DAG.getCopyFromReg(cast<RegSDNode>(Node)->getReg(),
                                   Node->getValueType(0), Tmp1);
-    break;
+    else
+      Result = Op.getValue(0);
+
+    // Since CopyFromReg produces two values, make sure to remember that we
+    // legalized both of them.
+    AddLegalizedOperand(Op.getValue(0), Result);
+    AddLegalizedOperand(Op.getValue(1), Result.getValue(1));
+    return Result.getValue(Op.ResNo);
   case ISD::ImplicitDef:
     Tmp1 = LegalizeOp(Node->getOperand(0));
     if (Tmp1 != Node->getOperand(0))