Remove the PHIElimination.h header, as it is no longer needed.

llvm-svn: 120959

1 files changed, 0 insertions, 74 deletions

diff --git a/llvm/lib/CodeGen/PHIElimination.h b/llvm/lib/CodeGen/PHIElimination.h
deleted file mode 100644
index 3690732bcfa..00000000000
--- a/llvm/lib/CodeGen/PHIElimination.h
+++ /dev/null
@@ -1,74 +0,0 @@
-//===-- lib/CodeGen/PHIElimination.h ----------------------------*- C++ -*-===//
-//
-//                     The LLVM Compiler Infrastructure
-//
-// This file is distributed under the University of Illinois Open Source
-// License. See LICENSE.TXT for details.
-//
-//===----------------------------------------------------------------------===//
-
-#ifndef LLVM_CODEGEN_PHIELIMINATION_HPP
-#define LLVM_CODEGEN_PHIELIMINATION_HPP
-
-#include "llvm/ADT/DenseMap.h"
-#include "llvm/ADT/SmallSet.h"
-#include "llvm/ADT/SmallPtrSet.h"
-#include "llvm/CodeGen/MachineBasicBlock.h"
-#include "llvm/CodeGen/MachineFunctionPass.h"
-
-namespace llvm {
-  class LiveVariables;
-  class MachineRegisterInfo;
-  class MachineLoopInfo;
-  
-  /// Lower PHI instructions to copies.  
-  class PHIElimination : public MachineFunctionPass {
-    MachineRegisterInfo *MRI; // Machine register information
-
-  public:
-    static char ID; // Pass identification, replacement for typeid
-    PHIElimination() : MachineFunctionPass(ID) {
-      initializePHIEliminationPass(*PassRegistry::getPassRegistry());
-    }
-
-    virtual bool runOnMachineFunction(MachineFunction &Fn);
-    
-    virtual void getAnalysisUsage(AnalysisUsage &AU) const;
-
-  private:
-    /// EliminatePHINodes - Eliminate phi nodes by inserting copy instructions
-    /// in predecessor basic blocks.
-    ///
-    bool EliminatePHINodes(MachineFunction &MF, MachineBasicBlock &MBB);
-    void LowerAtomicPHINode(MachineBasicBlock &MBB,
-                            MachineBasicBlock::iterator AfterPHIsIt);
-
-    /// analyzePHINodes - Gather information about the PHI nodes in
-    /// here. In particular, we want to map the number of uses of a virtual
-    /// register which is used in a PHI node. We map that to the BB the
-    /// vreg is coming from. This is used later to determine when the vreg
-    /// is killed in the BB.
-    ///
-    void analyzePHINodes(const MachineFunction& Fn);
-
-    /// Split critical edges where necessary for good coalescer performance.
-    bool SplitPHIEdges(MachineFunction &MF, MachineBasicBlock &MBB,
-                       LiveVariables &LV, MachineLoopInfo *MLI);
-
-    typedef std::pair<unsigned, unsigned> BBVRegPair;
-    typedef DenseMap<BBVRegPair, unsigned> VRegPHIUse;
-
-    VRegPHIUse VRegPHIUseCount;
-
-    // Defs of PHI sources which are implicit_def.
-    SmallPtrSet<MachineInstr*, 4> ImpDefs;
-
-    // Map reusable lowered PHI node -> incoming join register.
-    typedef DenseMap<MachineInstr*, unsigned,
-                     MachineInstrExpressionTrait> LoweredPHIMap;
-    LoweredPHIMap LoweredPHIs;
-  };
-
-}
-
-#endif /* LLVM_CODEGEN_PHIELIMINATION_HPP */