From 721c201bd55ffb73cb2ba8d39e0570fa38c44e15 Mon Sep 17 00:00:00 2001
From: dim <dim@FreeBSD.org>
Date: Wed, 15 Aug 2012 19:34:23 +0000
Subject: Vendor import of llvm trunk r161861:
 http://llvm.org/svn/llvm-project/llvm/trunk@161861

---
 lib/CodeGen/ExpandPostRAPseudos.cpp | 11 +++++++----
 1 file changed, 7 insertions(+), 4 deletions(-)

(limited to 'lib/CodeGen/ExpandPostRAPseudos.cpp')

diff --git a/lib/CodeGen/ExpandPostRAPseudos.cpp b/lib/CodeGen/ExpandPostRAPseudos.cpp
index b14afc2..7a17331 100644
--- a/lib/CodeGen/ExpandPostRAPseudos.cpp
+++ b/lib/CodeGen/ExpandPostRAPseudos.cpp
@@ -131,13 +131,16 @@ bool ExpandPostRA::LowerSubregToReg(MachineInstr *MI) {
   } else {
     TII->copyPhysReg(*MBB, MI, MI->getDebugLoc(), DstSubReg, InsReg,
                      MI->getOperand(2).isKill());
+
+    // Implicitly define DstReg for subsequent uses.
+    MachineBasicBlock::iterator CopyMI = MI;
+    --CopyMI;
+    CopyMI->addRegisterDefined(DstReg);
+
     // Transfer the kill/dead flags, if needed.
     if (MI->getOperand(0).isDead())
       TransferDeadFlag(MI, DstSubReg, TRI);
-    DEBUG({
-        MachineBasicBlock::iterator dMI = MI;
-        dbgs() << "subreg: " << *(--dMI);
-      });
+    DEBUG(dbgs() << "subreg: " << *CopyMI);
   }
 
   DEBUG(dbgs() << '\n');
-- 
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