llvm-6502/include/llvm/CodeGen/AsmPrinter.h
Chris Lattner a833f6b061 remove dead method.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@98526 91177308-0d34-0410-b5e6-96231b3b80d8
2010-03-15 00:00:42 +00:00

397 lines
15 KiB
C++

//===-- llvm/CodeGen/AsmPrinter.h - AsmPrinter Framework --------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file contains a class to be used as the base class for target specific
// asm writers. This class primarily handles common functionality used by
// all asm writers.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_CODEGEN_ASMPRINTER_H
#define LLVM_CODEGEN_ASMPRINTER_H
#include "llvm/CodeGen/MachineFunctionPass.h"
#include "llvm/Support/DebugLoc.h"
#include "llvm/Target/TargetMachine.h"
namespace llvm {
class BlockAddress;
class GCStrategy;
class Constant;
class ConstantArray;
class ConstantFP;
class ConstantInt;
class ConstantStruct;
class ConstantVector;
class GCMetadataPrinter;
class GlobalValue;
class GlobalVariable;
class MachineBasicBlock;
class MachineFunction;
class MachineInstr;
class MachineLoopInfo;
class MachineLoop;
class MachineConstantPool;
class MachineConstantPoolEntry;
class MachineConstantPoolValue;
class MachineJumpTableInfo;
class MachineModuleInfo;
class MCInst;
class MCContext;
class MCSection;
class MCStreamer;
class MCSymbol;
class MDNode;
class DwarfWriter;
class Mangler;
class MCAsmInfo;
class TargetLoweringObjectFile;
class Twine;
class Type;
class formatted_raw_ostream;
/// AsmPrinter - This class is intended to be used as a driving class for all
/// asm writers.
class AsmPrinter : public MachineFunctionPass {
static char ID;
// GCMetadataPrinters - The garbage collection metadata printer table.
typedef DenseMap<GCStrategy*,GCMetadataPrinter*> gcp_map_type;
typedef gcp_map_type::iterator gcp_iterator;
gcp_map_type GCMetadataPrinters;
/// If VerboseAsm is set, a pointer to the loop info for this
/// function.
///
MachineLoopInfo *LI;
public:
/// MMI - If available, this is a pointer to the current MachineModuleInfo.
MachineModuleInfo *MMI;
protected:
/// DW - If available, this is a pointer to the current dwarf writer.
DwarfWriter *DW;
public:
/// Output stream on which we're printing assembly code.
///
formatted_raw_ostream &O;
/// Target machine description.
///
TargetMachine &TM;
/// getObjFileLowering - Return information about object file lowering.
TargetLoweringObjectFile &getObjFileLowering() const;
/// Target Asm Printer information.
///
const MCAsmInfo *MAI;
/// Target Register Information.
///
const TargetRegisterInfo *TRI;
/// OutContext - This is the context for the output file that we are
/// streaming. This owns all of the global MC-related objects for the
/// generated translation unit.
MCContext &OutContext;
/// OutStreamer - This is the MCStreamer object for the file we are
/// generating. This contains the transient state for the current
/// translation unit that we are generating (such as the current section
/// etc).
MCStreamer &OutStreamer;
/// The current machine function.
const MachineFunction *MF;
/// Name-mangler for global names.
///
Mangler *Mang;
/// The symbol for the current function. This is recalculated at the
/// beginning of each call to runOnMachineFunction().
///
MCSymbol *CurrentFnSym;
/// getCurrentSection() - Return the current section we are emitting to.
const MCSection *getCurrentSection() const;
/// VerboseAsm - Emit comments in assembly output if this is true.
///
bool VerboseAsm;
/// Private state for PrintSpecial()
// Assign a unique ID to this machine instruction.
mutable const MachineInstr *LastMI;
mutable const Function *LastFn;
mutable unsigned Counter;
mutable unsigned SetCounter;
// Private state for processDebugLoc()
mutable const MDNode *PrevDLT;
protected:
explicit AsmPrinter(formatted_raw_ostream &o, TargetMachine &TM,
MCStreamer &Streamer);
public:
virtual ~AsmPrinter();
/// isVerbose - Return true if assembly output should contain comments.
///
bool isVerbose() const { return VerboseAsm; }
/// getFunctionNumber - Return a unique ID for the current function.
///
unsigned getFunctionNumber() const;
protected:
/// getAnalysisUsage - Record analysis usage.
///
void getAnalysisUsage(AnalysisUsage &AU) const;
/// doInitialization - Set up the AsmPrinter when we are working on a new
/// module. If your pass overrides this, it must make sure to explicitly
/// call this implementation.
bool doInitialization(Module &M);
/// EmitStartOfAsmFile - This virtual method can be overridden by targets
/// that want to emit something at the start of their file.
virtual void EmitStartOfAsmFile(Module &) {}
/// EmitEndOfAsmFile - This virtual method can be overridden by targets that
/// want to emit something at the end of their file.
virtual void EmitEndOfAsmFile(Module &) {}
/// doFinalization - Shut down the asmprinter. If you override this in your
/// pass, you must make sure to call it explicitly.
bool doFinalization(Module &M);
/// PrintSpecial - Print information related to the specified machine instr
/// that is independent of the operand, and may be independent of the instr
/// itself. This can be useful for portably encoding the comment character
/// or other bits of target-specific knowledge into the asmstrings. The
/// syntax used is ${:comment}. Targets can override this to add support
/// for their own strange codes.
virtual void PrintSpecial(const MachineInstr *MI, const char *Code) const;
/// PrintAsmOperand - Print the specified operand of MI, an INLINEASM
/// instruction, using the specified assembler variant. Targets should
/// override this to format as appropriate. This method can return true if
/// the operand is erroneous.
virtual bool PrintAsmOperand(const MachineInstr *MI, unsigned OpNo,
unsigned AsmVariant, const char *ExtraCode);
/// PrintAsmMemoryOperand - Print the specified operand of MI, an INLINEASM
/// instruction, using the specified assembler variant as an address.
/// Targets should override this to format as appropriate. This method can
/// return true if the operand is erroneous.
virtual bool PrintAsmMemoryOperand(const MachineInstr *MI, unsigned OpNo,
unsigned AsmVariant,
const char *ExtraCode);
/// runOnMachineFunction - Emit the specified function out to the
/// OutStreamer.
virtual bool runOnMachineFunction(MachineFunction &MF) {
SetupMachineFunction(MF);
EmitFunctionHeader();
EmitFunctionBody();
return false;
}
/// SetupMachineFunction - This should be called when a new MachineFunction
/// is being processed from runOnMachineFunction.
void SetupMachineFunction(MachineFunction &MF);
/// EmitFunctionHeader - This method emits the header for the current
/// function.
void EmitFunctionHeader();
/// EmitFunctionBody - This method emits the body and trailer for a
/// function.
void EmitFunctionBody();
/// EmitInstruction - Targets should implement this to emit instructions.
virtual void EmitInstruction(const MachineInstr *) {
assert(0 && "EmitInstruction not implemented");
}
/// EmitFunctionBodyStart - Targets can override this to emit stuff before
/// the first basic block in the function.
virtual void EmitFunctionBodyStart() {}
/// EmitFunctionBodyEnd - Targets can override this to emit stuff after
/// the last basic block in the function.
virtual void EmitFunctionBodyEnd() {}
/// EmitConstantPool - Print to the current output stream assembly
/// representations of the constants in the constant pool MCP. This is
/// used to print out constants which have been "spilled to memory" by
/// the code generator.
///
virtual void EmitConstantPool();
/// EmitJumpTableInfo - Print assembly representations of the jump tables
/// used by the current function to the current output stream.
///
void EmitJumpTableInfo();
/// EmitGlobalVariable - Emit the specified global variable to the .s file.
virtual void EmitGlobalVariable(const GlobalVariable *GV);
/// EmitSpecialLLVMGlobal - Check to see if the specified global is a
/// special global used by LLVM. If so, emit it and return true, otherwise
/// do nothing and return false.
bool EmitSpecialLLVMGlobal(const GlobalVariable *GV);
public:
//===------------------------------------------------------------------===//
// Emission and print routines
//
/// EmitInt8 - Emit a byte directive and value.
///
void EmitInt8(int Value) const;
/// EmitInt16 - Emit a short directive and value.
///
void EmitInt16(int Value) const;
/// EmitInt32 - Emit a long directive and value.
///
void EmitInt32(int Value) const;
/// EmitInt64 - Emit a long long directive and value.
///
void EmitInt64(uint64_t Value) const;
/// EmitLabelDifference - Emit something like ".long Hi-Lo" where the size
/// in bytes of the directive is specified by Size and Hi/Lo specify the
/// labels. This implicitly uses .set if it is available.
void EmitLabelDifference(const MCSymbol *Hi, const MCSymbol *Lo,
unsigned Size) const;
//===------------------------------------------------------------------===//
/// EmitAlignment - Emit an alignment directive to the specified power of
/// two boundary. For example, if you pass in 3 here, you will get an 8
/// byte alignment. If a global value is specified, and if that global has
/// an explicit alignment requested, it will unconditionally override the
/// alignment request. However, if ForcedAlignBits is specified, this value
/// has final say: the ultimate alignment will be the max of ForcedAlignBits
/// and the alignment computed with NumBits and the global. If UseFillExpr
/// is true, it also emits an optional second value FillValue which the
/// assembler uses to fill gaps to match alignment for text sections if the
/// has specified a non-zero fill value.
///
/// The algorithm is:
/// Align = NumBits;
/// if (GV && GV->hasalignment) Align = GV->getalignment();
/// Align = std::max(Align, ForcedAlignBits);
///
void EmitAlignment(unsigned NumBits, const GlobalValue *GV = 0,
unsigned ForcedAlignBits = 0,
bool UseFillExpr = true) const;
/// printDeclare - This method prints a local variable declaration used by
/// debug tables.
void printDeclare(const MachineInstr *MI) const;
/// GetSymbolWithGlobalValueBase - Return the MCSymbol for a symbol with
/// global value name as its base, with the specified suffix, and where the
/// symbol is forced to have private linkage if ForcePrivate is true.
MCSymbol *GetSymbolWithGlobalValueBase(const GlobalValue *GV,
StringRef Suffix,
bool ForcePrivate = true) const;
/// GetExternalSymbolSymbol - Return the MCSymbol for the specified
/// ExternalSymbol.
MCSymbol *GetExternalSymbolSymbol(StringRef Sym) const;
/// GetCPISymbol - Return the symbol for the specified constant pool entry.
MCSymbol *GetCPISymbol(unsigned CPID) const;
/// GetJTISymbol - Return the symbol for the specified jump table entry.
MCSymbol *GetJTISymbol(unsigned JTID, bool isLinkerPrivate = false) const;
/// GetJTSetSymbol - Return the symbol for the specified jump table .set
/// FIXME: privatize to AsmPrinter.
MCSymbol *GetJTSetSymbol(unsigned UID, unsigned MBBID) const;
/// GetBlockAddressSymbol - Return the MCSymbol used to satisfy BlockAddress
/// uses of the specified basic block.
MCSymbol *GetBlockAddressSymbol(const BlockAddress *BA) const;
MCSymbol *GetBlockAddressSymbol(const BasicBlock *BB) const;
/// EmitBasicBlockStart - This method prints the label for the specified
/// MachineBasicBlock, an alignment (if present) and a comment describing
/// it if appropriate.
void EmitBasicBlockStart(const MachineBasicBlock *MBB) const;
// Data emission.
/// EmitGlobalConstant - Print a general LLVM constant to the .s file.
void EmitGlobalConstant(const Constant* CV, unsigned AddrSpace = 0);
protected:
virtual void EmitFunctionEntryLabel();
virtual void EmitMachineConstantPoolValue(MachineConstantPoolValue *MCPV);
/// printOffset - This is just convenient handler for printing offsets.
void printOffset(int64_t Offset) const;
/// isBlockOnlyReachableByFallthough - Return true if the basic block has
/// exactly one predecessor and the control transfer mechanism between
/// the predecessor and this block is a fall-through.
virtual bool isBlockOnlyReachableByFallthrough(const MachineBasicBlock *MBB) const;
private:
/// processDebugLoc - Processes the debug information of each machine
/// instruction's DebugLoc.
void processDebugLoc(const MachineInstr *MI, bool BeforePrintingInsn);
void printLabelInst(const MachineInstr *MI) const;
/// printInlineAsm - This method formats and prints the specified machine
/// instruction that is an inline asm.
void printInlineAsm(const MachineInstr *MI) const;
/// printImplicitDef - This method prints the specified machine instruction
/// that is an implicit def.
void printImplicitDef(const MachineInstr *MI) const;
/// printKill - This method prints the specified kill machine instruction.
void printKill(const MachineInstr *MI) const;
/// EmitVisibility - This emits visibility information about symbol, if
/// this is suported by the target.
void EmitVisibility(MCSymbol *Sym, unsigned Visibility) const;
void EmitLinkage(unsigned Linkage, MCSymbol *GVSym) const;
void EmitJumpTableEntry(const MachineJumpTableInfo *MJTI,
const MachineBasicBlock *MBB,
unsigned uid) const;
void EmitLLVMUsedList(Constant *List);
void EmitXXStructorList(Constant *List);
GCMetadataPrinter *GetOrCreateGCPrinter(GCStrategy *C);
};
}
#endif