From 988b1dd608ed596879e29ad27d4aafdbf3a8f1ac Mon Sep 17 00:00:00 2001
From: Chris Lattner <sabre@nondot.org>
Date: Thu, 28 Jul 2005 05:23:43 +0000
Subject: [PATCH] Eliminate an extra copy from R1 that Nate noticed on function
 calls that have to write arguments to the stack

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22536 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/Target/PowerPC/PPCISelPattern.cpp | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/lib/Target/PowerPC/PPCISelPattern.cpp b/lib/Target/PowerPC/PPCISelPattern.cpp
index efdb8b5b289..c544e4d7fd0 100644
--- a/lib/Target/PowerPC/PPCISelPattern.cpp
+++ b/lib/Target/PowerPC/PPCISelPattern.cpp
@@ -1293,7 +1293,8 @@ unsigned ISel::SelectExpr(SDOperand N, bool Recording) {
   MVT::ValueType DestType = N.getValueType();
 
   if (Node->getOpcode() == ISD::CopyFromReg &&
-      MRegisterInfo::isVirtualRegister(cast<RegSDNode>(Node)->getReg()))
+      (MRegisterInfo::isVirtualRegister(cast<RegSDNode>(Node)->getReg()) ||
+       cast<RegSDNode>(Node)->getReg() == PPC::R1))
     // Just use the specified register as our input.
     return cast<RegSDNode>(Node)->getReg();