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//===-- llvm/CodeGen/MachineFunction.h --------------------------*- 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.
//
//===----------------------------------------------------------------------===//
//
// Collect native machine code for a function. This class contains a list of
// MachineBasicBlock instances that make up the current compiled function.
//
// This class also contains pointers to various classes which hold
// target-specific information about the generated code.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_CODEGEN_MACHINEFUNCTION_H
#define LLVM_CODEGEN_MACHINEFUNCTION_H
#include "llvm/CodeGen/MachineBasicBlock.h"
#include "Support/Annotation.h"
namespace llvm {
// ilist_traits
template <>
class ilist_traits<MachineBasicBlock> {
// this is only set by the MachineFunction owning the ilist
friend class MachineFunction;
MachineFunction* Parent;
public:
ilist_traits<MachineBasicBlock>() : Parent(0) { }
static MachineBasicBlock* getPrev(MachineBasicBlock* N) { return N->Prev; }
static MachineBasicBlock* getNext(MachineBasicBlock* N) { return N->Next; }
static const MachineBasicBlock*
getPrev(const MachineBasicBlock* N) { return N->Prev; }
static const MachineBasicBlock*
getNext(const MachineBasicBlock* N) { return N->Next; }
static void setPrev(MachineBasicBlock* N, MachineBasicBlock* prev) { N->Prev = prev; }
static void setNext(MachineBasicBlock* N, MachineBasicBlock* next) { N->Next = next; }
static MachineBasicBlock* createNode();
void addNodeToList(MachineBasicBlock* N);
void removeNodeFromList(MachineBasicBlock* N);
void transferNodesFromList(
iplist<MachineBasicBlock, ilist_traits<MachineBasicBlock> >& toList,
ilist_iterator<MachineBasicBlock> first,
ilist_iterator<MachineBasicBlock> last);
};
class Function;
class TargetMachine;
class SSARegMap;
class MachineFunctionInfo;
class MachineFrameInfo;
class MachineConstantPool;
class MachineFunction : private Annotation {
const Function *Fn;
const TargetMachine &Target;
// List of machine basic blocks in function
ilist<MachineBasicBlock> BasicBlocks;
// Keeping track of mapping from SSA values to registers
SSARegMap *SSARegMapping;
// Used to keep track of frame and constant area information for sparc be
MachineFunctionInfo *MFInfo;
// Keep track of objects allocated on the stack.
MachineFrameInfo *FrameInfo;
// Keep track of constants which are spilled to memory
MachineConstantPool *ConstantPool;
// Function-level unique numbering for MachineBasicBlocks
int NextMBBNumber;
public:
MachineFunction(const Function *Fn, const TargetMachine &TM);
~MachineFunction();
/// getFunction - Return the LLVM function that this machine code represents
///
const Function *getFunction() const { return Fn; }
/// getTarget - Return the target machine this machine code is compiled with
///
const TargetMachine &getTarget() const { return Target; }
/// SSARegMap Interface... Keep track of information about each SSA virtual
/// register, such as which register class it belongs to.
///
SSARegMap *getSSARegMap() const { return SSARegMapping; }
void clearSSARegMap();
/// getFrameInfo - Return the frame info object for the current function.
/// This object contains information about objects allocated on the stack
/// frame of the current function in an abstract way.
///
MachineFrameInfo *getFrameInfo() const { return FrameInfo; }
/// getConstantPool - Return the constant pool object for the current
/// function.
MachineConstantPool *getConstantPool() const { return ConstantPool; }
/// MachineFunctionInfo - Keep track of various per-function pieces of
/// information for the sparc backend.
///
MachineFunctionInfo *getInfo() const { return MFInfo; }
/// getNextMBBNumber - Returns the next unique number to be assigned
/// to a MachineBasicBlock in this MachineFunction.
///
int getNextMBBNumber() { return NextMBBNumber++; }
/// print - Print out the MachineFunction in a format suitable for debugging
/// to the specified stream.
///
void print(std::ostream &OS) const;
/// dump - Print the current MachineFunction to cerr, useful for debugger use.
///
void dump() const;
/// construct - Allocate and initialize a MachineFunction for a given Function
/// and Target
///
static MachineFunction& construct(const Function *F, const TargetMachine &TM);
/// destruct - Destroy the MachineFunction corresponding to a given Function
///
static void destruct(const Function *F);
/// get - Return a handle to a MachineFunction corresponding to the given
/// Function. This should not be called before "construct()" for a given
/// Function.
///
static MachineFunction& get(const Function *F);
// Provide accessors for the MachineBasicBlock list...
typedef ilist<MachineBasicBlock> BasicBlockListType;
typedef BasicBlockListType::iterator iterator;
typedef BasicBlockListType::const_iterator const_iterator;
typedef std::reverse_iterator<const_iterator> const_reverse_iterator;
typedef std::reverse_iterator<iterator> reverse_iterator;
// Provide accessors for basic blocks...
const BasicBlockListType &getBasicBlockList() const { return BasicBlocks; }
BasicBlockListType &getBasicBlockList() { return BasicBlocks; }
//===--------------------------------------------------------------------===//
// BasicBlock iterator forwarding functions
//
iterator begin() { return BasicBlocks.begin(); }
const_iterator begin() const { return BasicBlocks.begin(); }
iterator end () { return BasicBlocks.end(); }
const_iterator end () const { return BasicBlocks.end(); }
reverse_iterator rbegin() { return BasicBlocks.rbegin(); }
const_reverse_iterator rbegin() const { return BasicBlocks.rbegin(); }
reverse_iterator rend () { return BasicBlocks.rend(); }
const_reverse_iterator rend () const { return BasicBlocks.rend(); }
unsigned size() const { return BasicBlocks.size(); }
bool empty() const { return BasicBlocks.empty(); }
const MachineBasicBlock &front() const { return BasicBlocks.front(); }
MachineBasicBlock &front() { return BasicBlocks.front(); }
const MachineBasicBlock & back() const { return BasicBlocks.back(); }
MachineBasicBlock & back() { return BasicBlocks.back(); }
};
} // End llvm namespace
#endif
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