From 831a2bba04f0ccb9a2754ef4b0fca0a410f48ac2 Mon Sep 17 00:00:00 2001
From: Chris Lattner <sabre@nondot.org>
Date: Wed, 7 Oct 2009 22:49:30 +0000
Subject: [PATCH] second half of lazy liveness removal.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@83500 91177308-0d34-0410-b5e6-96231b3b80d8
---
 include/llvm/CodeGen/LazyLiveness.h | 64 -----------------------------
 lib/CodeGen/CMakeLists.txt          |  1 -
 2 files changed, 65 deletions(-)
 delete mode 100644 include/llvm/CodeGen/LazyLiveness.h

diff --git a/include/llvm/CodeGen/LazyLiveness.h b/include/llvm/CodeGen/LazyLiveness.h
deleted file mode 100644
index 388b6381090..00000000000
--- a/include/llvm/CodeGen/LazyLiveness.h
+++ /dev/null
@@ -1,64 +0,0 @@
-//===- LazyLiveness.h - Lazy, CFG-invariant liveness information ----------===//
-//
-//                     The LLVM Compiler Infrastructure
-//
-// This file is distributed under the University of Illinois Open Source
-// License. See LICENSE.TXT for details.
-//
-//===----------------------------------------------------------------------===//
-//
-// This pass implements a lazy liveness analysis as per "Fast Liveness Checking
-// for SSA-form Programs," by Boissinot, et al.
-//
-//===----------------------------------------------------------------------===//
-
-#ifndef LLVM_CODEGEN_LAZYLIVENESS_H
-#define LLVM_CODEGEN_LAZYLIVENESS_H
-
-#include "llvm/CodeGen/MachineFunctionPass.h"
-#include "llvm/CodeGen/MachineDominators.h"
-#include "llvm/ADT/DenseMap.h"
-#include "llvm/ADT/DenseSet.h"
-#include "llvm/ADT/SparseBitVector.h"
-#include <vector>
-
-namespace llvm {
-
-class MachineRegisterInfo;
-
-class LazyLiveness : public MachineFunctionPass {
-public:
-  static char ID; // Pass identification, replacement for typeid
-  LazyLiveness() : MachineFunctionPass(&ID) { }
-  
-  void getAnalysisUsage(AnalysisUsage &AU) const {
-    AU.setPreservesAll();
-    AU.addRequired<MachineDominatorTree>();
-    MachineFunctionPass::getAnalysisUsage(AU);
-  }
-  
-  bool runOnMachineFunction(MachineFunction &mf);
-
-  bool vregLiveIntoMBB(unsigned vreg, MachineBasicBlock* MBB);
-  
-private:
-  void computeBackedgeChain(MachineFunction& mf, MachineBasicBlock* MBB);
-  
-  typedef std::pair<MachineBasicBlock*, MachineBasicBlock*> edge_t;
-  
-  MachineRegisterInfo* MRI;
-  
-  DenseMap<MachineBasicBlock*, unsigned> preorder;
-  std::vector<MachineBasicBlock*> rev_preorder;
-  DenseMap<MachineBasicBlock*, SparseBitVector<128> > rv;
-  DenseMap<MachineBasicBlock*, SparseBitVector<128> > tv;
-  DenseSet<edge_t> backedges;
-  SparseBitVector<128> backedge_source;
-  SparseBitVector<128> backedge_target;
-  SparseBitVector<128> calculated;
-};
-
-}
-
-#endif
-
diff --git a/lib/CodeGen/CMakeLists.txt b/lib/CodeGen/CMakeLists.txt
index 5b116e951cb..713c30c7d4a 100644
--- a/lib/CodeGen/CMakeLists.txt
+++ b/lib/CodeGen/CMakeLists.txt
@@ -13,7 +13,6 @@ add_llvm_library(LLVMCodeGen
   IntrinsicLowering.cpp
   LLVMTargetMachine.cpp
   LatencyPriorityQueue.cpp
-  LazyLiveness.cpp
   LiveInterval.cpp
   LiveIntervalAnalysis.cpp
   LiveStackAnalysis.cpp