mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-12-15 04:30:12 +00:00
7d715dfe6d
const Constant *. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@133400 91177308-0d34-0410-b5e6-96231b3b80d8
475 lines
18 KiB
C++
475 lines
18 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/DataTypes.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 MachineLocation;
|
|
class MachineLoopInfo;
|
|
class MachineLoop;
|
|
class MachineConstantPool;
|
|
class MachineConstantPoolEntry;
|
|
class MachineConstantPoolValue;
|
|
class MachineJumpTableInfo;
|
|
class MachineModuleInfo;
|
|
class MachineMove;
|
|
class MCAsmInfo;
|
|
class MCInst;
|
|
class MCContext;
|
|
class MCSection;
|
|
class MCStreamer;
|
|
class MCSymbol;
|
|
class MDNode;
|
|
class DwarfDebug;
|
|
class DwarfException;
|
|
class Mangler;
|
|
class TargetLoweringObjectFile;
|
|
class TargetData;
|
|
class TargetMachine;
|
|
class Twine;
|
|
class Type;
|
|
|
|
/// AsmPrinter - This class is intended to be used as a driving class for all
|
|
/// asm writers.
|
|
class AsmPrinter : public MachineFunctionPass {
|
|
public:
|
|
/// Target machine description.
|
|
///
|
|
TargetMachine &TM;
|
|
|
|
/// Target Asm Printer information.
|
|
///
|
|
const MCAsmInfo *MAI;
|
|
|
|
/// 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;
|
|
|
|
/// MMI - This is a pointer to the current MachineModuleInfo.
|
|
MachineModuleInfo *MMI;
|
|
|
|
/// 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;
|
|
|
|
private:
|
|
// GCMetadataPrinters - The garbage collection metadata printer table.
|
|
void *GCMetadataPrinters; // Really a DenseMap.
|
|
|
|
/// VerboseAsm - Emit comments in assembly output if this is true.
|
|
///
|
|
bool VerboseAsm;
|
|
static char ID;
|
|
|
|
/// If VerboseAsm is set, a pointer to the loop info for this
|
|
/// function.
|
|
MachineLoopInfo *LI;
|
|
|
|
/// DD - If the target supports dwarf debug info, this pointer is non-null.
|
|
DwarfDebug *DD;
|
|
|
|
/// DE - If the target supports dwarf exception info, this pointer is
|
|
/// non-null.
|
|
DwarfException *DE;
|
|
|
|
protected:
|
|
explicit AsmPrinter(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;
|
|
|
|
/// getObjFileLowering - Return information about object file lowering.
|
|
const TargetLoweringObjectFile &getObjFileLowering() const;
|
|
|
|
/// getTargetData - Return information about data layout.
|
|
const TargetData &getTargetData() const;
|
|
|
|
/// getCurrentSection() - Return the current section we are emitting to.
|
|
const MCSection *getCurrentSection() const;
|
|
|
|
|
|
//===------------------------------------------------------------------===//
|
|
// MachineFunctionPass Implementation.
|
|
//===------------------------------------------------------------------===//
|
|
|
|
/// 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);
|
|
|
|
/// doFinalization - Shut down the asmprinter. If you override this in your
|
|
/// pass, you must make sure to call it explicitly.
|
|
bool doFinalization(Module &M);
|
|
|
|
/// runOnMachineFunction - Emit the specified function out to the
|
|
/// OutStreamer.
|
|
virtual bool runOnMachineFunction(MachineFunction &MF) {
|
|
SetupMachineFunction(MF);
|
|
EmitFunctionHeader();
|
|
EmitFunctionBody();
|
|
return false;
|
|
}
|
|
|
|
//===------------------------------------------------------------------===//
|
|
// Coarse grained IR lowering routines.
|
|
//===------------------------------------------------------------------===//
|
|
|
|
/// 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();
|
|
|
|
void emitPrologLabel(const MachineInstr &MI);
|
|
|
|
enum CFIMoveType {
|
|
CFI_M_None,
|
|
CFI_M_EH,
|
|
CFI_M_Debug
|
|
};
|
|
CFIMoveType needsCFIMoves();
|
|
|
|
bool needsSEHMoves();
|
|
|
|
/// 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);
|
|
|
|
/// 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 override the alignment request
|
|
/// if required for correctness.
|
|
///
|
|
void EmitAlignment(unsigned NumBits, const GlobalValue *GV = 0) 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;
|
|
|
|
/// EmitGlobalConstant - Print a general LLVM constant to the .s file.
|
|
void EmitGlobalConstant(const Constant *CV, unsigned AddrSpace = 0);
|
|
|
|
|
|
//===------------------------------------------------------------------===//
|
|
// Overridable Hooks
|
|
//===------------------------------------------------------------------===//
|
|
|
|
// Targets can, or in the case of EmitInstruction, must implement these to
|
|
// customize output.
|
|
|
|
/// 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 &) {}
|
|
|
|
/// 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() {}
|
|
|
|
/// EmitInstruction - Targets should implement this to emit instructions.
|
|
virtual void EmitInstruction(const MachineInstr *) {
|
|
assert(0 && "EmitInstruction not implemented");
|
|
}
|
|
|
|
virtual void EmitFunctionEntryLabel();
|
|
|
|
virtual void EmitMachineConstantPoolValue(MachineConstantPoolValue *MCPV);
|
|
|
|
/// 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;
|
|
|
|
//===------------------------------------------------------------------===//
|
|
// Symbol Lowering Routines.
|
|
//===------------------------------------------------------------------===//
|
|
public:
|
|
|
|
/// GetTempSymbol - Return the MCSymbol corresponding to the assembler
|
|
/// temporary label with the specified stem and unique ID.
|
|
MCSymbol *GetTempSymbol(StringRef Name, unsigned ID) const;
|
|
|
|
/// GetTempSymbol - Return an assembler temporary label with the specified
|
|
/// stem.
|
|
MCSymbol *GetTempSymbol(StringRef Name) 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;
|
|
|
|
//===------------------------------------------------------------------===//
|
|
// Emission Helper Routines.
|
|
//===------------------------------------------------------------------===//
|
|
public:
|
|
/// printOffset - This is just convenient handler for printing offsets.
|
|
void printOffset(int64_t Offset, raw_ostream &OS) const;
|
|
|
|
/// 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;
|
|
|
|
/// 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;
|
|
|
|
/// EmitLabelOffsetDifference - Emit something like ".long Hi+Offset-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 EmitLabelOffsetDifference(const MCSymbol *Hi, uint64_t Offset,
|
|
const MCSymbol *Lo, unsigned Size) const;
|
|
|
|
/// EmitLabelPlusOffset - Emit something like ".long Label+Offset"
|
|
/// where the size in bytes of the directive is specified by Size and Label
|
|
/// specifies the label. This implicitly uses .set if it is available.
|
|
void EmitLabelPlusOffset(const MCSymbol *Label, uint64_t Offset,
|
|
unsigned Size) const;
|
|
|
|
//===------------------------------------------------------------------===//
|
|
// Dwarf Emission Helper Routines
|
|
//===------------------------------------------------------------------===//
|
|
|
|
/// EmitSLEB128 - emit the specified signed leb128 value.
|
|
void EmitSLEB128(int Value, const char *Desc = 0) const;
|
|
|
|
/// EmitULEB128 - emit the specified unsigned leb128 value.
|
|
void EmitULEB128(unsigned Value, const char *Desc = 0,
|
|
unsigned PadTo = 0) const;
|
|
|
|
/// EmitCFAByte - Emit a .byte 42 directive for a DW_CFA_xxx value.
|
|
void EmitCFAByte(unsigned Val) const;
|
|
|
|
/// EmitEncodingByte - Emit a .byte 42 directive that corresponds to an
|
|
/// encoding. If verbose assembly output is enabled, we output comments
|
|
/// describing the encoding. Desc is a string saying what the encoding is
|
|
/// specifying (e.g. "LSDA").
|
|
void EmitEncodingByte(unsigned Val, const char *Desc = 0) const;
|
|
|
|
/// GetSizeOfEncodedValue - Return the size of the encoding in bytes.
|
|
unsigned GetSizeOfEncodedValue(unsigned Encoding) const;
|
|
|
|
/// EmitReference - Emit a reference to a label with a specified encoding.
|
|
///
|
|
void EmitReference(const MCSymbol *Sym, unsigned Encoding) const;
|
|
void EmitReference(const GlobalValue *GV, unsigned Encoding) const;
|
|
|
|
/// EmitSectionOffset - Emit the 4-byte offset of Label from the start of
|
|
/// its section. This can be done with a special directive if the target
|
|
/// supports it (e.g. cygwin) or by emitting it as an offset from a label at
|
|
/// the start of the section.
|
|
///
|
|
/// SectionLabel is a temporary label emitted at the start of the section
|
|
/// that Label lives in.
|
|
void EmitSectionOffset(const MCSymbol *Label,
|
|
const MCSymbol *SectionLabel) const;
|
|
|
|
/// getDebugValueLocation - Get location information encoded by DBG_VALUE
|
|
/// operands.
|
|
virtual MachineLocation getDebugValueLocation(const MachineInstr *MI) const;
|
|
|
|
/// getISAEncoding - Get the value for DW_AT_APPLE_isa. Zero if no isa
|
|
/// encoding specified.
|
|
virtual unsigned getISAEncoding() { return 0; }
|
|
|
|
/// EmitDwarfRegOp - Emit dwarf register operation.
|
|
virtual void EmitDwarfRegOp(const MachineLocation &MLoc) const;
|
|
|
|
//===------------------------------------------------------------------===//
|
|
// Dwarf Lowering Routines
|
|
//===------------------------------------------------------------------===//
|
|
|
|
/// EmitCFIFrameMove - Emit frame instruction to describe the layout of the
|
|
/// frame.
|
|
void EmitCFIFrameMove(const MachineMove &Move) const;
|
|
|
|
//===------------------------------------------------------------------===//
|
|
// Inline Asm Support
|
|
//===------------------------------------------------------------------===//
|
|
public:
|
|
// These are hooks that targets can override to implement inline asm
|
|
// support. These should probably be moved out of AsmPrinter someday.
|
|
|
|
/// 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, raw_ostream &OS,
|
|
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,
|
|
raw_ostream &OS);
|
|
|
|
/// 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,
|
|
raw_ostream &OS);
|
|
|
|
private:
|
|
/// Private state for PrintSpecial()
|
|
// Assign a unique ID to this machine instruction.
|
|
mutable const MachineInstr *LastMI;
|
|
mutable unsigned LastFn;
|
|
mutable unsigned Counter;
|
|
mutable unsigned SetCounter;
|
|
|
|
/// EmitInlineAsm - Emit a blob of inline asm to the output streamer.
|
|
void EmitInlineAsm(StringRef Str, const MDNode *LocMDNode = 0) const;
|
|
|
|
/// EmitInlineAsm - This method formats and emits the specified machine
|
|
/// instruction that is an inline asm.
|
|
void EmitInlineAsm(const MachineInstr *MI) const;
|
|
|
|
//===------------------------------------------------------------------===//
|
|
// Internal Implementation Details
|
|
//===------------------------------------------------------------------===//
|
|
|
|
/// EmitVisibility - This emits visibility information about symbol, if
|
|
/// this is suported by the target.
|
|
void EmitVisibility(MCSymbol *Sym, unsigned Visibility,
|
|
bool IsDefinition = true) const;
|
|
|
|
void EmitLinkage(unsigned Linkage, MCSymbol *GVSym) const;
|
|
|
|
void EmitJumpTableEntry(const MachineJumpTableInfo *MJTI,
|
|
const MachineBasicBlock *MBB,
|
|
unsigned uid) const;
|
|
void EmitLLVMUsedList(const Constant *List);
|
|
void EmitXXStructorList(const Constant *List);
|
|
GCMetadataPrinter *GetOrCreateGCPrinter(GCStrategy *C);
|
|
};
|
|
}
|
|
|
|
#endif
|