X-Git-Url: http://demsky.eecs.uci.edu/git/?a=blobdiff_plain;f=include%2Fllvm%2FCodeGen%2FAsmPrinter.h;h=e1be58ee5688ece34b4415cf7096e7e59e26c0b0;hb=62ed6b9ade63bf01717ce5274fa11e93e873d245;hp=042e1d3f021d40ecce68d6337983f3c04f7bada7;hpb=563321a2582851c653d0863e8e0bba3d483734f9;p=oota-llvm.git diff --git a/include/llvm/CodeGen/AsmPrinter.h b/include/llvm/CodeGen/AsmPrinter.h index 042e1d3f021..e1be58ee568 100644 --- a/include/llvm/CodeGen/AsmPrinter.h +++ b/include/llvm/CodeGen/AsmPrinter.h @@ -2,8 +2,8 @@ // // 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. +// This file is distributed under the University of Illinois Open Source +// License. See LICENSE.TXT for details. // //===----------------------------------------------------------------------===// // @@ -18,19 +18,24 @@ #include "llvm/CodeGen/MachineFunctionPass.h" #include "llvm/Support/DataTypes.h" +#include namespace llvm { class Constant; class ConstantArray; class GlobalVariable; + class GlobalAlias; class MachineConstantPoolEntry; + class MachineConstantPoolValue; class Mangler; class TargetAsmInfo; - + 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; + /// FunctionNumber - This provides a unique ID for each function emitted in /// this translation unit. It is autoincremented by SetupMachineFunction, /// and can be accessed with getFunctionNumber() and @@ -38,6 +43,10 @@ namespace llvm { /// unsigned FunctionNumber; + protected: + // Necessary for external weak linkage support + std::set ExtWeakSymbols; + public: /// Output stream on which we're printing assembly code. /// @@ -49,7 +58,7 @@ namespace llvm { /// Target Asm Printer information. /// - TargetAsmInfo *TAI; + const TargetAsmInfo *TAI; /// Name-mangler for global names. /// @@ -65,7 +74,7 @@ namespace llvm { std::string CurrentSection; protected: - AsmPrinter(std::ostream &o, TargetMachine &TM, TargetAsmInfo *T); + AsmPrinter(std::ostream &o, TargetMachine &TM, const TargetAsmInfo *T); public: /// SwitchToTextSection - Switch to the specified section of the executable @@ -78,7 +87,7 @@ namespace llvm { /// /// This method is used when about to emit executable code. /// - void SwitchToTextSection(const char *NewSection, const GlobalValue *GV); + void SwitchToTextSection(const char *NewSection, const GlobalValue *GV = NULL); /// SwitchToDataSection - Switch to the specified section of the executable /// if we are not already in it! If GV is non-null and if the global has an @@ -92,12 +101,22 @@ namespace llvm { /// is the same as the SwitchToTextSection method, but not all assemblers /// are the same. /// - void SwitchToDataSection(const char *NewSection, const GlobalValue *GV); + void SwitchToDataSection(const char *NewSection, const GlobalValue *GV = NULL); - /// getPreferredAlignmentLog - Return the preferred alignment of the - /// specified global, returned in log form. This includes an explicitly - /// requested alignment (if the global has one). - unsigned getPreferredAlignmentLog(const GlobalVariable *GV) const; + /// getGlobalLinkName - Returns the asm/link name of of the specified + /// global variable. Should be overridden by each target asm printer to + /// generate the appropriate value. + virtual const std::string getGlobalLinkName(const GlobalVariable *GV) const; + + /// EmitExternalGlobal - Emit the external reference to a global variable. + /// Should be overridden if an indirect reference should be used. + virtual void EmitExternalGlobal(const GlobalVariable *GV); + + /// getCurrentFunctionEHName - Called to return (and cache) the + /// CurrentFnEHName. + /// + std::string getCurrentFunctionEHName(const MachineFunction *MF); + protected: /// doInitialization - Set up the AsmPrinter when we are working on a new /// module. If your pass overrides this, it must make sure to explicitly @@ -107,6 +126,14 @@ namespace llvm { /// 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); /// PrintAsmOperand - Print the specified operand of MI, an INLINEASM /// instruction, using the specified assembler variant. Targets should @@ -123,6 +150,12 @@ namespace llvm { unsigned AsmVariant, const char *ExtraCode); + /// getSectionForFunction - Return the section that we should emit the + /// specified function body into. This defaults to 'TextSection'. This + /// should most likely be overridden by the target to put linkonce/weak + /// functions into special sections. + virtual std::string getSectionForFunction(const Function &F) const; + /// SetupMachineFunction - This should be called when a new MachineFunction /// is being processed from runOnMachineFunction. void SetupMachineFunction(MachineFunction &MF); @@ -146,19 +179,100 @@ namespace llvm { /// EmitJumpTableInfo - Print assembly representations of the jump tables /// used by the current function to the current output stream. /// - void EmitJumpTableInfo(MachineJumpTableInfo *MJTI); + void EmitJumpTableInfo(MachineJumpTableInfo *MJTI, MachineFunction &MF); /// 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: + //===------------------------------------------------------------------===// + /// LEB 128 number encoding. + + /// PrintULEB128 - Print a series of hexidecimal values(separated by commas) + /// representing an unsigned leb128 value. + void PrintULEB128(unsigned Value) const; + + /// SizeULEB128 - Compute the number of bytes required for an unsigned + /// leb128 value. + static unsigned SizeULEB128(unsigned Value); + + /// PrintSLEB128 - Print a series of hexidecimal values(separated by commas) + /// representing a signed leb128 value. + void PrintSLEB128(int Value) const; + + /// SizeSLEB128 - Compute the number of bytes required for a signed leb128 + /// value. + static unsigned SizeSLEB128(int Value); + + //===------------------------------------------------------------------===// + // Emission and print routines + // + + /// PrintHex - Print a value as a hexidecimal value. + /// + void PrintHex(int Value) const; + + /// EOL - Print a newline character to asm stream. If a comment is present + /// then it will be printed first. Comments should not contain '\n'. + void EOL() const; + void EOL(const std::string &Comment) const; + + /// EmitULEB128Bytes - Emit an assembler byte data directive to compose an + /// unsigned leb128 value. + void EmitULEB128Bytes(unsigned Value) const; + + /// EmitSLEB128Bytes - print an assembler byte data directive to compose a + /// signed leb128 value. + void EmitSLEB128Bytes(int Value) 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; + + /// EmitInt64 - Emit a long long directive and value. + /// + void EmitInt64(uint64_t Value) const; + + /// EmitString - Emit a string with quotes and a null terminator. + /// Special characters are emitted properly. + /// @verbatim (Eg. '\t') @endverbatim + void EmitString(const std::string &String) const; + + /// EmitFile - Emit a .file directive. + void EmitFile(unsigned Number, const std::string &Name) 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 override the alignment request. - void EmitAlignment(unsigned NumBits, const GlobalValue *GV = 0) const; + /// 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. + /// + /// 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 = false, + unsigned FillValue = 0) const; + protected: /// EmitZeros - Emit a block of zeros. /// void EmitZeros(uint64_t NumZeros) const; @@ -172,24 +286,41 @@ namespace llvm { void EmitConstantValueOnly(const Constant *CV); /// EmitGlobalConstant - Print a general LLVM constant to the .s file. - /// - void EmitGlobalConstant(const Constant* CV); + /// If Packed is false, pad to the ABI size. + void EmitGlobalConstant(const Constant* CV, bool Packed = false); + + virtual void EmitMachineConstantPoolValue(MachineConstantPoolValue *MCPV); /// printInlineAsm - This method formats and prints the specified machine /// instruction that is an inline asm. void printInlineAsm(const MachineInstr *MI) const; + /// printLabel - This method prints a local label used by debug and + /// exception handling tables. + void printLabel(const MachineInstr *MI) const; + /// printBasicBlockLabel - This method prints the label for the specified /// MachineBasicBlock virtual void printBasicBlockLabel(const MachineBasicBlock *MBB, bool printColon = false, bool printComment = true) const; - /// printSetLabel - This method prints a set label for the specified - /// MachineBasicBlock - void printSetLabel(unsigned uid, const MachineBasicBlock *MBB) 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; + virtual void printPICJumpTableSetLabel(unsigned uid, unsigned uid2, + const MachineBasicBlock *MBB) const; + virtual void printPICJumpTableEntry(const MachineJumpTableInfo *MJTI, + const MachineBasicBlock *MBB, + unsigned uid) const; + /// printDataDirective - This method prints the asm directive for the + /// specified type. + void printDataDirective(const Type *type); + private: + void EmitLLVMUsedList(Constant *List); void EmitXXStructorList(Constant *List); void EmitConstantPool(unsigned Alignment, const char *Section, std::vector > &CP);