From 1953ecb0a6fc8520b34b52fd04f7476a7eb4613f Mon Sep 17 00:00:00 2001
From: Dan Gohman <gohman@apple.com>
Date: Wed, 27 Feb 2008 01:52:30 +0000
Subject: [PATCH] Teach Legalize how to expand an EXTRACT_ELEMENT.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47656 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/CodeGen/SelectionDAG/LegalizeDAG.cpp | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp b/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp
index f4a2bc0b960..32b210114a0 100644
--- a/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp
+++ b/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp
@@ -5739,6 +5739,12 @@ void SelectionDAGLegalize::ExpandOp(SDOperand Op, SDOperand &Lo, SDOperand &Hi){
 #endif
     assert(0 && "Do not know how to expand this operator!");
     abort();
+  case ISD::EXTRACT_ELEMENT:
+    ExpandOp(Node->getOperand(0), Lo, Hi);
+    if (cast<ConstantSDNode>(Node->getOperand(1))->getValue())
+      return ExpandOp(Hi, Lo, Hi);
+    else
+      return ExpandOp(Lo, Lo, Hi);
   case ISD::EXTRACT_VECTOR_ELT:
     assert(VT==MVT::i64 && "Do not know how to expand this operator!");
     // ExpandEXTRACT_VECTOR_ELT tolerates invalid result types.