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//===- llvm/Analysis/ValueNumbering.h - Value #'ing Interface ---*- C++ -*-===//
//
// 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 defines the abstract ValueNumbering interface, which is used as the
// common interface used by all clients of value numbering information, and
// implemented by all value numbering implementations.
//
// Implementations of this interface must implement the various virtual methods,
// which automatically provides functionality for the entire suite of client
// APIs.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_ANALYSIS_VALUE_NUMBERING_H
#define LLVM_ANALYSIS_VALUE_NUMBERING_H
#include <vector>
#include "llvm/Pass.h"
namespace llvm {
class Value;
class Instruction;
struct ValueNumbering {
virtual ~ValueNumbering(); // We want to be subclassed
/// getEqualNumberNodes - Return nodes with the same value number as the
/// specified Value. This fills in the argument vector with any equal values.
///
virtual void getEqualNumberNodes(Value *V1,
std::vector<Value*> &RetVals) const = 0;
///===-------------------------------------------------------------------===//
/// Interfaces to update value numbering analysis information as the client
/// changes the program
///
/// deleteInstruction - Clients should invoke this method when they delete an
/// instruction from the program. This allows the analysis implementations to
/// avoid having dangling pointers in their representation.
virtual void deleteInstruction(Instruction *I) {}
};
extern void BasicValueNumberingStub();
static IncludeFile
HDR_INCLUDE_VALUENUMBERING_CPP((void*)&BasicValueNumberingStub);
} // End llvm namespace
#endif
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