#include "llvm/CodeGen/MachineFunctionPass.h"
#include "llvm/Support/DebugLoc.h"
-#include "llvm/Target/TargetMachine.h"
namespace llvm {
class BlockAddress;
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:
- /// Flags to specify different kinds of comments to output in
- /// assembly code. These flags carry semantic information not
- /// otherwise easily derivable from the IR text.
- ///
- enum CommentFlag {
- ReloadReuse = 0x1
- };
-
- /// 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.
/// 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;
///
MCSymbol *CurrentFnSym;
+ /// getObjFileLowering - Return information about object file lowering.
+ TargetLoweringObjectFile &getObjFileLowering() const;
+
/// 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;
-
- /// Private state for PrintSpecial()
- // Assign a unique ID to this machine instruction.
- mutable const MachineInstr *LastMI;
- mutable const Function *LastFn;
- mutable unsigned Counter;
+ static char ID;
+
+ /// If VerboseAsm is set, a pointer to the loop info for this
+ /// function.
+ ///
+ MachineLoopInfo *LI;
- // Private state for processDebugLoc()
- mutable const MDNode *PrevDLT;
-
protected:
- explicit AsmPrinter(formatted_raw_ostream &o, TargetMachine &TM,
- const MCAsmInfo *T, bool V);
+ explicit AsmPrinter(TargetMachine &TM, MCStreamer &Streamer);
public:
virtual ~AsmPrinter();
///
unsigned getFunctionNumber() const;
- protected:
+ //===------------------------------------------------------------------===//
+ // 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, 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);
+ /// runOnMachineFunction - Emit the specified function out to the
+ /// OutStreamer.
+ virtual bool runOnMachineFunction(MachineFunction &MF) {
+ SetupMachineFunction(MF);
+ EmitFunctionHeader();
+ EmitFunctionBody();
+ return false;
+ }
- /// 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);
+ //===------------------------------------------------------------------===//
+ // 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();
+
/// 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.
///
- void EmitConstantPool(MachineConstantPool *MCP);
-
+ virtual void EmitConstantPool();
+
/// EmitJumpTableInfo - Print assembly representations of the jump tables
/// used by the current function to the current output stream.
///
- void EmitJumpTableInfo(MachineFunction &MF);
+ void EmitJumpTableInfo();
/// EmitGlobalVariable - Emit the specified global variable to the .s file.
virtual void EmitGlobalVariable(const GlobalVariable *GV);
/// 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;
-
- //===------------------------------------------------------------------===//
-
/// 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:
- /// printLabel - This method prints a local label used by debug and
- /// exception handling tables.
- void printLabel(const MachineInstr *MI) const;
- void printLabel(unsigned Id) const;
-
- /// printDeclare - This method prints a local variable declaration used by
- /// debug tables.
- void printDeclare(const MachineInstr *MI) const;
-
- /// EmitComments - Pretty-print comments for instructions
- void EmitComments(const MachineInstr &MI) const;
-
- /// GetGlobalValueSymbol - Return the MCSymbol for the specified global
- /// value.
- MCSymbol *GetGlobalValueSymbol(const GlobalValue *GV) const;
-
+ /// 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.
/// GetBlockAddressSymbol - Return the MCSymbol used to satisfy BlockAddress
/// uses of the specified basic block.
- MCSymbol *GetBlockAddressSymbol(const BlockAddress *BA,
- const char *Suffix = "") const;
- MCSymbol *GetBlockAddressSymbol(const Function *F,
- const BasicBlock *BB,
- const char *Suffix = "") const;
+ 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 EmitMachineConstantPoolValue(MachineConstantPoolValue *MCPV);
+ /// 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;
+
+ //===------------------------------------------------------------------===//
+ // 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);
+
+ //===------------------------------------------------------------------===//
+ // 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;
- /// 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) const;
- /// printInlineAsm - This method formats and prints the specified machine
+ /// EmitInlineAsm - This method formats and emits 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;
+ void EmitInlineAsm(const MachineInstr *MI) const;
- /// printKill - This method prints the specified kill machine instruction.
- void printKill(const MachineInstr *MI) const;
-
- /// printPICJumpTableSetLabel - This method prints a set label for the
- /// specified MachineBasicBlock for a jumptable entry.
- virtual void printPICJumpTableSetLabel(unsigned uid,
- const MachineBasicBlock *MBB) const;
+ //===------------------------------------------------------------------===//
+ // Internal Implementation Details
+ //===------------------------------------------------------------------===//
- /// printVisibility - This prints visibility information about symbol, if
+ /// EmitVisibility - This emits visibility information about symbol, if
/// this is suported by the target.
- void printVisibility(MCSymbol *Sym, unsigned Visibility) const;
+ void EmitVisibility(MCSymbol *Sym, unsigned Visibility) const;
+
+ void EmitLinkage(unsigned Linkage, MCSymbol *GVSym) const;
- /// printOffset - This is just convenient handler for printing offsets.
- void printOffset(int64_t Offset) const;
-
- private:
void EmitJumpTableEntry(const MachineJumpTableInfo *MJTI,
const MachineBasicBlock *MBB,
unsigned uid) const;
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