From bd7b181f94e75ea0e4906c3373625ba807f08358 Mon Sep 17 00:00:00 2001
From: Lang Hames <lhames@gmail.com>
Date: Mon, 16 Nov 2009 02:07:31 +0000
Subject: [PATCH] Fixes the bug exposed by Anton's test case in PR 5495: Make
 sure when ProcessImplicitDefs removes a copy which kills its source reg that
 it removes the copy from said reg's Kills list.

llvm-svn: 88881
---
 lib/CodeGen/ProcessImplicitDefs.cpp | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/lib/CodeGen/ProcessImplicitDefs.cpp b/lib/CodeGen/ProcessImplicitDefs.cpp
index 48567a0fc7f..23b78c74386 100644
--- a/lib/CodeGen/ProcessImplicitDefs.cpp
+++ b/lib/CodeGen/ProcessImplicitDefs.cpp
@@ -209,6 +209,10 @@ bool ProcessImplicitDefs::runOnMachineFunction(MachineFunction &fn) {
         unsigned SrcReg, DstReg, SrcSubReg, DstSubReg;
         if (tii_->isMoveInstr(*RMI, SrcReg, DstReg, SrcSubReg, DstSubReg) &&
             Reg == SrcReg) {
+          if (RMO.isKill()) {
+            LiveVariables::VarInfo& vi = lv_->getVarInfo(Reg);
+            vi.removeKill(RMI);
+          }
           RMI->setDesc(tii_->get(TargetInstrInfo::IMPLICIT_DEF));
           for (int j = RMI->getNumOperands() - 1, ee = 0; j > ee; --j)
             RMI->RemoveOperand(j);