class MachineConstantPoolValue;
class MachineJumpTableInfo;
class MachineModuleInfo;
+ class MachineMove;
+ class MCAsmInfo;
class MCInst;
class MCContext;
class MCSection;
class MCStreamer;
class MCSymbol;
- class DwarfWriter;
+ class DwarfDebug;
+ class DwarfException;
class Mangler;
- class MCAsmInfo;
class TargetLoweringObjectFile;
+ class TargetData;
class Twine;
class Type;
/// AsmPrinter - This class is intended to be used as a driving class for all
/// asm writers.
class AsmPrinter : public MachineFunctionPass {
- static char ID;
-
- /// If VerboseAsm is set, a pointer to the loop info for this
- /// function.
- ///
- MachineLoopInfo *LI;
-
- protected:
- /// DW - If available, this is a pointer to the current dwarf writer.
- DwarfWriter *DW;
-
public:
-
/// Target machine description.
///
TargetMachine &TM;
///
MCSymbol *CurrentFnSym;
- /// getCurrentSection() - Return the current section we are emitting to.
- const MCSection *getCurrentSection() const;
-
+ 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;
-
- /// getObjFileLowering - Return information about object file lowering.
- TargetLoweringObjectFile &getObjFileLowering() const;
+ static char ID;
- private:
- // GCMetadataPrinters - The garbage collection metadata printer table.
- void *GCMetadataPrinters; // Really a DenseMap.
+ /// 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;
- /// 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;
+ /// DE - If the target supports dwarf exception info, this pointer is
+ /// non-null.
+ DwarfException *DE;
protected:
explicit AsmPrinter(TargetMachine &TM, MCStreamer &Streamer);
///
unsigned getFunctionNumber() const;
+ /// getObjFileLowering - Return information about object file lowering.
+ 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;
/// 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, 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);
-
/// runOnMachineFunction - Emit the specified function out to the
/// OutStreamer.
virtual bool runOnMachineFunction(MachineFunction &MF) {
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);
/// 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
/// do nothing and return false.
bool EmitSpecialLLVMGlobal(const GlobalVariable *GV);
- public:
- //===------------------------------------------------------------------===//
- // Emission 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;
-
- /// 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
void EmitAlignment(unsigned NumBits, const GlobalValue *GV = 0,
unsigned ForcedAlignBits = 0,
bool UseFillExpr = true) 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 *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;
+ //===------------------------------------------------------------------===//
+ // 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;
- // Data emission.
+ /// EmitInt16 - Emit a short directive and value.
+ ///
+ void EmitInt16(int Value) const;
- /// EmitGlobalConstant - Print a general LLVM constant to the .s file.
- void EmitGlobalConstant(const Constant* CV, unsigned AddrSpace = 0);
+ /// EmitInt32 - Emit a long directive and value.
+ ///
+ void EmitInt32(int Value) const;
- protected:
- virtual void EmitFunctionEntryLabel();
+ /// 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;
- virtual void EmitMachineConstantPoolValue(MachineConstantPoolValue *MCPV);
-
- /// printOffset - This is just convenient handler for printing offsets.
- void printOffset(int64_t Offset, raw_ostream &OS) 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;
+ //===------------------------------------------------------------------===//
+ // 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;
+
+ //===------------------------------------------------------------------===//
+ // Dwarf Lowering Routines
+ //===------------------------------------------------------------------===//
+
+ /// EmitFrameMoves - Emit frame instructions to describe the layout of the
+ /// frame.
+ void EmitFrameMoves(const std::vector<MachineMove> &Moves,
+ MCSymbol *BaseLabel, bool isEH) 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:
- /// EmitInlineAsm - Emit a blob of inline asm to the output streamer.
- void EmitInlineAsm(StringRef Str) const;
+ /// 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;
- /// processDebugLoc - Processes the debug information of each machine
- /// instruction's DebugLoc.
- void processDebugLoc(const MachineInstr *MI, bool BeforePrintingInsn);
+ /// EmitInlineAsm - Emit a blob of inline asm to the output streamer.
+ void EmitInlineAsm(StringRef Str, unsigned LocCookie) const;
/// EmitInlineAsm - This method formats and emits the specified machine
/// instruction that is an inline asm.
void EmitInlineAsm(const MachineInstr *MI) const;
- /// EmitImplicitDef - This method emits the specified machine instruction
- /// that is an implicit def.
- void EmitImplicitDef(const MachineInstr *MI) const;
-
- /// EmitKill - This method emits the specified kill machine instruction.
- void EmitKill(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) const;
projects / oota-llvm.git / blobdiff