From: Chris Lattner <sabre@nondot.org>
Date: Mon, 12 Dec 2005 22:27:43 +0000 (+0000)
Subject: Fix CodeGen/Generic/2005-12-12-ExpandSextInreg.ll
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=58f7963b8b3cb8894623a7d7663cc54005fea8f9;p=oota-llvm.git

Fix CodeGen/Generic/2005-12-12-ExpandSextInreg.ll


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24677 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp b/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp
index 620b6439c68..6896fb39e26 100644
--- a/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp
+++ b/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp
@@ -3196,6 +3196,16 @@ void SelectionDAGLegalize::ExpandOp(SDOperand Op, SDOperand &Lo, SDOperand &Hi){
     Lo = LegalizeOp(Node->getOperand(0));
     Hi = LegalizeOp(Node->getOperand(1));
     break;
+    
+  case ISD::SIGN_EXTEND_INREG:
+    ExpandOp(Node->getOperand(0), Lo, Hi);
+    // Sign extend the lo-part.
+    Hi = DAG.getNode(ISD::SRA, NVT, Lo,
+                     DAG.getConstant(MVT::getSizeInBits(NVT)-1,
+                                     TLI.getShiftAmountTy()));
+    // sext_inreg the low part if needed.
+    Lo = DAG.getNode(ISD::SIGN_EXTEND_INREG, NVT, Lo, Node->getOperand(1));
+    break;
 
   case ISD::CTPOP:
     ExpandOp(Node->getOperand(0), Lo, Hi);