From d88b8babe05521fdb076ba73f90ffe54702ceffc Mon Sep 17 00:00:00 2001
From: Devang Patel <dpatel@apple.com>
Date: Tue, 21 Jun 2011 23:02:36 +0000
Subject: [PATCH] After register is spilled there should not be any DBG_VALUE
 referring the same register.

llvm-svn: 133569
---
 llvm/lib/CodeGen/RegAllocFast.cpp | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/llvm/lib/CodeGen/RegAllocFast.cpp b/llvm/lib/CodeGen/RegAllocFast.cpp
index dd5baab8d867..0f27dfcf8848 100644
--- a/llvm/lib/CodeGen/RegAllocFast.cpp
+++ b/llvm/lib/CodeGen/RegAllocFast.cpp
@@ -293,9 +293,11 @@ void RAFast::spillVirtReg(MachineBasicBlock::iterator MI,
         MachineBasicBlock *MBB = DBG->getParent();
         MBB->insert(MI, NewDV);
         DEBUG(dbgs() << "Inserting debug info due to spill:" << "\n" << *NewDV);
-        LRIDbgValues[li] = NewDV;
       }
     }
+    // Now this register is spilled there is should not be any DBG_VALUE pointing
+    // to this register because they are all pointing to spilled value now.
+    LRIDbgValues.clear();
     if (SpillKill)
       LR.LastUse = 0; // Don't kill register again
   }