From bd9a22a54ea3eebd6e9ce34ba6f339c76dae2c62 Mon Sep 17 00:00:00 2001
From: dim <dim@FreeBSD.org>
Date: Thu, 7 Oct 2010 20:31:07 +0000
Subject: Upgrade Clang and LLVM to the 2.8 release.  See here for release
 notes: http://llvm.org/releases/2.8/docs/ReleaseNotes.html

Approved by:	rpaulo (mentor)
---
 contrib/llvm/lib/CodeGen/MachineCSE.cpp | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

(limited to 'contrib/llvm/lib/CodeGen/MachineCSE.cpp')

diff --git a/contrib/llvm/lib/CodeGen/MachineCSE.cpp b/contrib/llvm/lib/CodeGen/MachineCSE.cpp
index 92e2299..272b54d 100644
--- a/contrib/llvm/lib/CodeGen/MachineCSE.cpp
+++ b/contrib/llvm/lib/CodeGen/MachineCSE.cpp
@@ -54,6 +54,11 @@ namespace {
       AU.addPreserved<MachineDominatorTree>();
     }
 
+    virtual void releaseMemory() {
+      ScopeMap.clear();
+      Exps.clear();
+    }
+
   private:
     const unsigned LookAheadLimit;
     typedef ScopedHashTableScope<MachineInstr*, unsigned,
@@ -101,7 +106,7 @@ bool MachineCSE::PerformTrivialCoalescing(MachineInstr *MI,
     unsigned Reg = MO.getReg();
     if (!Reg || TargetRegisterInfo::isPhysicalRegister(Reg))
       continue;
-    if (!MRI->hasOneUse(Reg))
+    if (!MRI->hasOneNonDBGUse(Reg))
       // Only coalesce single use copies. This ensure the copy will be
       // deleted.
       continue;
@@ -469,6 +474,8 @@ bool MachineCSE::PerformCSE(MachineDomTreeNode *Node) {
   DenseMap<MachineDomTreeNode*, MachineDomTreeNode*> ParentMap;
   DenseMap<MachineDomTreeNode*, unsigned> OpenChildren;
 
+  CurrVN = 0;
+
   // Perform a DFS walk to determine the order of visit.
   WorkList.push_back(Node);
   do {
-- 
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