From 53eeba586dac8a25db63fe02a00ef10feb8b3925 Mon Sep 17 00:00:00 2001
From: Cameron Zwarich <zwarich@apple.com>
Date: Mon, 3 Jan 2011 04:07:46 +0000
Subject: Use a RecyclingAllocator to allocate values for MachineCSE's
 ScopedHashTable for a 28% speedup of MachineCSE time on 403.gcc.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122735 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/CodeGen/MachineCSE.cpp | 10 +++++++---
 1 file changed, 7 insertions(+), 3 deletions(-)

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

diff --git a/lib/CodeGen/MachineCSE.cpp b/lib/CodeGen/MachineCSE.cpp
index fc3f5943d7..bb1db86658 100644
--- a/lib/CodeGen/MachineCSE.cpp
+++ b/lib/CodeGen/MachineCSE.cpp
@@ -25,6 +25,7 @@
 #include "llvm/ADT/SmallSet.h"
 #include "llvm/ADT/Statistic.h"
 #include "llvm/Support/Debug.h"
+#include "llvm/Support/RecyclingAllocator.h"
 
 using namespace llvm;
 
@@ -65,10 +66,13 @@ namespace {
 
   private:
     const unsigned LookAheadLimit;
-    typedef ScopedHashTableScope<MachineInstr*, unsigned,
-                                 MachineInstrExpressionTrait> ScopeType;
+    typedef RecyclingAllocator<BumpPtrAllocator,
+        ScopedHashTableVal<MachineInstr*, unsigned> > AllocatorTy;
+    typedef ScopedHashTable<MachineInstr*, unsigned,
+        MachineInstrExpressionTrait, AllocatorTy> ScopedHTType;
+    typedef ScopedHTType::ScopeTy ScopeType;
     DenseMap<MachineBasicBlock*, ScopeType*> ScopeMap;
-    ScopedHashTable<MachineInstr*, unsigned, MachineInstrExpressionTrait> VNT;
+    ScopedHTType VNT;
     SmallVector<MachineInstr*, 64> Exps;
     unsigned CurrVN;
 
-- 
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