From 406fad0bad28ff95925810b78c5f73dd29fac708 Mon Sep 17 00:00:00 2001
From: Dale Johannesen <dalej@apple.com>
Date: Thu, 11 Feb 2010 18:22:31 +0000
Subject: [PATCH] Don't allow DBG_VALUE to affect codegen.

llvm-svn: 95889
---
 lib/CodeGen/TwoAddressInstructionPass.cpp | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/lib/CodeGen/TwoAddressInstructionPass.cpp b/lib/CodeGen/TwoAddressInstructionPass.cpp
index 31552f89780..6f4ca82525b 100644
--- a/lib/CodeGen/TwoAddressInstructionPass.cpp
+++ b/lib/CodeGen/TwoAddressInstructionPass.cpp
@@ -213,6 +213,9 @@ bool TwoAddressInstructionPass::Sink3AddrInstruction(MachineBasicBlock *MBB,
   unsigned NumVisited = 0;
   for (MachineBasicBlock::iterator I = llvm::next(OldPos); I != KillPos; ++I) {
     MachineInstr *OtherMI = I;
+    // DBG_VALUE cannot be counted against the limit.
+    if (OtherMI->isDebugValue())
+      continue;
     if (NumVisited > 30)  // FIXME: Arbitrary limit to reduce compile time cost.
       return false;
     ++NumVisited;