From 0638c20e7c6a084e454368c072f4bbe44c571479 Mon Sep 17 00:00:00 2001
From: Evan Cheng <evan.cheng@apple.com>
Date: Fri, 7 Jan 2011 21:08:26 +0000
Subject: DBG_VALUE does not have any side effects; it also makes no sense to
 mark it cheap as a copy.

llvm-svn: 123031
---
 llvm/lib/CodeGen/MachineInstr.cpp | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

(limited to 'llvm/lib/CodeGen/MachineInstr.cpp')

diff --git a/llvm/lib/CodeGen/MachineInstr.cpp b/llvm/lib/CodeGen/MachineInstr.cpp
index bc2a545a5f2..ccb2ffbab1d 100644
--- a/llvm/lib/CodeGen/MachineInstr.cpp
+++ b/llvm/lib/CodeGen/MachineInstr.cpp
@@ -1115,7 +1115,9 @@ bool MachineInstr::isSafeToMove(const TargetInstrInfo *TII,
     SawStore = true;
     return false;
   }
-  if (TID->isTerminator() || TID->hasUnmodeledSideEffects())
+
+  if (isLabel() || isDebugValue() ||
+      TID->isTerminator() || TID->hasUnmodeledSideEffects())
     return false;
 
   // See if this instruction does a load.  If so, we have to guarantee that the
-- 
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