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Use a RecyclingAllocator to allocate values for MachineCSE's ScopedHashTable for

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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
This commit is contained in:
Cameron Zwarich 2011-01-03 04:07:46 +00:00
parent 041ee7e6fa
commit 53eeba586d
1 changed files with 7 additions and 3 deletions
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10
lib/CodeGen/MachineCSE.cpp
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@ -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;