From: Evan Cheng <evan.cheng@apple.com>
Date: Tue, 10 Apr 2012 03:15:18 +0000 (+0000)
Subject: Make the code slightly more palatable.
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=b52ba49fdbf6cdf055e8b264c18b6e594fd30dc4;p=oota-llvm.git

Make the code slightly more palatable.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@154378 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp b/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp
index 22b5ae602ce..a96a99781f4 100644
--- a/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp
+++ b/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp
@@ -1790,7 +1790,11 @@ SDValue SelectionDAGLegalize::ExpandLibCall(RTLIB::Libcall LC, SDNode *Node,
 
   // isTailCall may be true since the callee does not reference caller stack
   // frame. Check if it's in the right position.
-  bool isTailCall = isInTailCallPosition(DAG, Node, InChain, TLI);
+  SDValue TCChain = InChain;
+  bool isTailCall = isInTailCallPosition(DAG, Node, TCChain, TLI);
+  if (isTailCall)
+    InChain = TCChain;
+
   std::pair<SDValue, SDValue> CallInfo =
     TLI.LowerCallTo(InChain, RetTy, isSigned, !isSigned, false, false,
                     0, TLI.getLibcallCallingConv(LC), isTailCall,