llvm-6502/lib/CodeGen/RegisterCoalescer.cpp
David Greene 2c17c4d8d9 Pluggable coalescers inplementation.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@41743 91177308-0d34-0410-b5e6-96231b3b80d8
2007-09-06 16:18:45 +00:00

44 lines
1.7 KiB
C++

//===- RegisterCoalescer.cpp - Generic Register Coalescing Interface -------==//
//
// The LLVM Compiler Infrastructure
//
// This file was developed by the LLVM research group and is distributed under
// the University of Illinois Open Source License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file implements the generic RegisterCoalescer interface which
// is used as the common interface used by all clients and
// implementations of register coalescing.
//
//===----------------------------------------------------------------------===//
#include "llvm/CodeGen/RegisterCoalescer.h"
#include "llvm/CodeGen/LiveIntervalAnalysis.h"
#include "llvm/CodeGen/MachineInstr.h"
#include "llvm/Target/MRegisterInfo.h"
#include "llvm/Pass.h"
using namespace llvm;
// Register the RegisterCoalescer interface, providing a nice name to refer to.
namespace {
RegisterAnalysisGroup<RegisterCoalescer> Z("Register Coalescer");
}
char RegisterCoalescer::ID = 0;
// RegisterCoalescer destructor: DO NOT move this to the header file
// for RegisterCoalescer or else clients of the RegisterCoalescer
// class may not depend on the RegisterCoalescer.o file in the current
// .a file, causing alias analysis support to not be included in the
// tool correctly!
//
RegisterCoalescer::~RegisterCoalescer() {}
// Because of the way .a files work, we must force the SimpleRC
// implementation to be pulled in if the RegisterCoalescer classes are
// pulled in. Otherwise we run the risk of RegisterCoalescer being
// used, but the default implementation not being linked into the tool
// that uses it.
DEFINING_FILE_FOR(RegisterCoalescer)