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llvm-6502/lib/CodeGen/PHIEliminationUtils.h
Cameron Zwarich a474685d06 Move the FindCopyInsertPoint method of PHIElimination to a new standalone
function so that it can be shared with StrongPHIElimination.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@120951 91177308-0d34-0410-b5e6-96231b3b80d8
2010-12-05 19:51:05 +00:00

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//=- PHIEliminationUtils.h - Helper functions for PHI elimination *- 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_PHIELIMINATIONUTILS_H
#define LLVM_CODEGEN_PHIELIMINATIONUTILS_H
#include "llvm/CodeGen/MachineBasicBlock.h"
namespace llvm {
/// findPHICopyInsertPoint - Find a safe place in MBB to insert a copy from
/// SrcReg when following the CFG edge to SuccMBB. This needs to be after
/// any def of SrcReg, but before any subsequent point where control flow
/// might jump out of the basic block.
MachineBasicBlock::iterator
findPHICopyInsertPoint(MachineBasicBlock* MBB, MachineBasicBlock* SuccMBB,
unsigned SrcReg);
}
#endif