2004-08-16 23:15:22 +00:00
|
|
|
//===-- llvm/CodeGen/AsmPrinter.h - AsmPrinter Framework --------*- C++ -*-===//
|
2005-04-21 20:39:54 +00:00
|
|
|
//
|
2004-08-16 23:15:22 +00:00
|
|
|
// 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.
|
2005-04-21 20:39:54 +00:00
|
|
|
//
|
2004-08-16 23:15:22 +00:00
|
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
//
|
|
|
|
// This class is intended to be used as a base class for target-specific
|
|
|
|
// asmwriters. This class primarily takes care of printing global constants,
|
|
|
|
// which are printed in a very similar way across all targets.
|
|
|
|
//
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
|
|
|
|
#ifndef LLVM_CODEGEN_ASMPRINTER_H
|
|
|
|
#define LLVM_CODEGEN_ASMPRINTER_H
|
|
|
|
|
|
|
|
#include "llvm/CodeGen/MachineFunctionPass.h"
|
2005-01-08 19:57:49 +00:00
|
|
|
#include "llvm/Support/DataTypes.h"
|
2004-08-16 23:15:22 +00:00
|
|
|
|
|
|
|
namespace llvm {
|
|
|
|
class Constant;
|
2006-05-02 01:16:28 +00:00
|
|
|
class ConstantArray;
|
2004-08-16 23:15:22 +00:00
|
|
|
class Mangler;
|
2005-12-13 06:32:10 +00:00
|
|
|
class GlobalVariable;
|
2004-08-16 23:15:22 +00:00
|
|
|
|
|
|
|
class AsmPrinter : public MachineFunctionPass {
|
2005-11-21 08:12:47 +00:00
|
|
|
/// 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
|
|
|
|
/// IncrementFunctionNumber().
|
|
|
|
///
|
|
|
|
unsigned FunctionNumber;
|
2006-01-04 13:52:30 +00:00
|
|
|
|
2006-01-04 22:28:25 +00:00
|
|
|
public:
|
2004-08-16 23:15:22 +00:00
|
|
|
/// Output stream on which we're printing assembly code.
|
|
|
|
///
|
|
|
|
std::ostream &O;
|
|
|
|
|
|
|
|
/// Target machine description.
|
|
|
|
///
|
|
|
|
TargetMachine &TM;
|
|
|
|
|
|
|
|
/// Name-mangler for global names.
|
|
|
|
///
|
|
|
|
Mangler *Mang;
|
|
|
|
|
|
|
|
/// Cache of mangled name for current function. This is recalculated at the
|
|
|
|
/// beginning of each call to runOnMachineFunction().
|
|
|
|
///
|
|
|
|
std::string CurrentFnName;
|
|
|
|
|
2004-08-17 06:36:27 +00:00
|
|
|
//===------------------------------------------------------------------===//
|
2004-08-17 02:28:12 +00:00
|
|
|
// Properties to be set by the derived class ctor, used to configure the
|
|
|
|
// asmwriter.
|
|
|
|
|
2004-08-18 02:22:34 +00:00
|
|
|
/// CommentString - This indicates the comment character used by the
|
2004-08-17 16:26:36 +00:00
|
|
|
/// assembler.
|
2004-08-18 02:22:34 +00:00
|
|
|
const char *CommentString; // Defaults to "#"
|
2004-08-17 16:26:36 +00:00
|
|
|
|
2004-08-17 06:06:19 +00:00
|
|
|
/// GlobalPrefix - If this is set to a non-empty string, it is prepended
|
|
|
|
/// onto all global symbols. This is often used for "_" or ".".
|
2004-08-17 16:26:36 +00:00
|
|
|
const char *GlobalPrefix; // Defaults to ""
|
2004-08-17 02:28:12 +00:00
|
|
|
|
2005-11-21 06:41:08 +00:00
|
|
|
/// PrivateGlobalPrefix - This prefix is used for globals like constant
|
|
|
|
/// pool entries that are completely private to the .o file and should not
|
|
|
|
/// have names in the .o file. This is often "." or "L".
|
|
|
|
const char *PrivateGlobalPrefix; // Defaults to "."
|
|
|
|
|
2005-04-02 12:21:51 +00:00
|
|
|
/// GlobalVarAddrPrefix/Suffix - If these are nonempty, these strings
|
|
|
|
/// will enclose any GlobalVariable (that isn't a function)
|
|
|
|
///
|
|
|
|
const char *GlobalVarAddrPrefix; // Defaults to ""
|
|
|
|
const char *GlobalVarAddrSuffix; // Defaults to ""
|
|
|
|
|
|
|
|
/// FunctionAddrPrefix/Suffix - If these are nonempty, these strings
|
|
|
|
/// will enclose any GlobalVariable that points to a function.
|
|
|
|
/// For example, this is used by the IA64 backend to materialize
|
|
|
|
/// function descriptors, by decorating the ".data8" object with the
|
2006-05-19 19:07:54 +00:00
|
|
|
/// \literal @fptr( ) \endliteral
|
|
|
|
/// link-relocation operator.
|
2005-04-02 12:21:51 +00:00
|
|
|
///
|
|
|
|
const char *FunctionAddrPrefix; // Defaults to ""
|
|
|
|
const char *FunctionAddrSuffix; // Defaults to ""
|
|
|
|
|
2006-02-08 23:41:56 +00:00
|
|
|
/// InlineAsmStart/End - If these are nonempty, they contain a directive to
|
|
|
|
/// emit before and after an inline assmebly statement.
|
|
|
|
const char *InlineAsmStart; // Defaults to "#APP\n"
|
|
|
|
const char *InlineAsmEnd; // Defaults to "#NO_APP\n"
|
|
|
|
|
2005-11-21 08:24:11 +00:00
|
|
|
//===--- Data Emission Directives -------------------------------------===//
|
|
|
|
|
2004-08-17 06:36:27 +00:00
|
|
|
/// ZeroDirective - this should be set to the directive used to get some
|
|
|
|
/// number of zero bytes emitted to the current section. Common cases are
|
|
|
|
/// "\t.zero\t" and "\t.space\t". If this is set to null, the
|
|
|
|
/// Data*bitsDirective's will be used to emit zero bytes.
|
|
|
|
const char *ZeroDirective; // Defaults to "\t.zero\t"
|
2006-05-02 03:46:13 +00:00
|
|
|
const char *ZeroDirectiveSuffix; // Defaults to ""
|
2004-08-17 06:36:27 +00:00
|
|
|
|
|
|
|
/// AsciiDirective - This directive allows emission of an ascii string with
|
|
|
|
/// the standard C escape characters embedded into it.
|
2005-11-10 18:05:57 +00:00
|
|
|
const char *AsciiDirective; // Defaults to "\t.ascii\t"
|
|
|
|
|
|
|
|
/// AscizDirective - If not null, this allows for special handling of
|
|
|
|
/// zero terminated strings on this target. This is commonly supported as
|
|
|
|
/// ".asciz". If a target doesn't support this, it can be set to null.
|
|
|
|
const char *AscizDirective; // Defaults to "\t.asciz\t"
|
2005-04-21 20:39:54 +00:00
|
|
|
|
2004-08-17 06:36:27 +00:00
|
|
|
/// DataDirectives - These directives are used to output some unit of
|
|
|
|
/// integer data to the current section. If a data directive is set to
|
|
|
|
/// null, smaller data directives will be used to emit the large sizes.
|
|
|
|
const char *Data8bitsDirective; // Defaults to "\t.byte\t"
|
|
|
|
const char *Data16bitsDirective; // Defaults to "\t.short\t"
|
|
|
|
const char *Data32bitsDirective; // Defaults to "\t.long\t"
|
|
|
|
const char *Data64bitsDirective; // Defaults to "\t.quad\t"
|
|
|
|
|
2005-11-21 08:24:11 +00:00
|
|
|
//===--- Alignment Information ----------------------------------------===//
|
|
|
|
|
2004-08-17 19:14:29 +00:00
|
|
|
/// AlignDirective - The directive used to emit round up to an alignment
|
|
|
|
/// boundary.
|
|
|
|
///
|
|
|
|
const char *AlignDirective; // Defaults to "\t.align\t"
|
|
|
|
|
|
|
|
/// AlignmentIsInBytes - If this is true (the default) then the asmprinter
|
|
|
|
/// emits ".align N" directives, where N is the number of bytes to align to.
|
|
|
|
/// Otherwise, it emits ".align log2(N)", e.g. 3 to align to an 8 byte
|
|
|
|
/// boundary.
|
|
|
|
bool AlignmentIsInBytes; // Defaults to true
|
2005-11-21 08:24:11 +00:00
|
|
|
|
|
|
|
//===--- Section Switching Directives ---------------------------------===//
|
|
|
|
|
2006-06-23 12:51:53 +00:00
|
|
|
/// CurrentSection - The current section we are emitting to. This is
|
|
|
|
/// controlled and used by the SwitchSection method.
|
|
|
|
std::string CurrentSection;
|
|
|
|
|
2005-11-21 08:24:11 +00:00
|
|
|
/// SwitchToSectionDirective - This is the directive used when we want to
|
|
|
|
/// emit a global to an arbitrary section. The section name is emited after
|
|
|
|
/// this.
|
|
|
|
const char *SwitchToSectionDirective; // Defaults to "\t.section\t"
|
2006-05-09 05:33:28 +00:00
|
|
|
|
|
|
|
/// TextSectionStartSuffix - This is printed after each start of section
|
|
|
|
/// directive for text sections.
|
|
|
|
const char *TextSectionStartSuffix; // Defaults to "".
|
|
|
|
|
|
|
|
/// DataSectionStartSuffix - This is printed after each start of section
|
|
|
|
/// directive for data sections.
|
|
|
|
const char *DataSectionStartSuffix; // Defaults to "".
|
|
|
|
|
|
|
|
/// SectionEndDirectiveSuffix - If non-null, the asm printer will close each
|
|
|
|
/// section with the section name and this suffix printed.
|
|
|
|
const char *SectionEndDirectiveSuffix; // Defaults to null.
|
2005-11-21 08:24:11 +00:00
|
|
|
|
|
|
|
/// ConstantPoolSection - This is the section that we SwitchToSection right
|
|
|
|
/// before emitting the constant pool for a function.
|
|
|
|
const char *ConstantPoolSection; // Defaults to "\t.section .rodata\n"
|
2004-08-17 19:14:29 +00:00
|
|
|
|
2006-04-22 18:53:45 +00:00
|
|
|
/// JumpTableSection - This is the section that we SwitchToSection right
|
|
|
|
/// before emitting the jump tables for a function.
|
|
|
|
const char *JumpTableSection; // Defaults to "\t.section .rodata\n"
|
|
|
|
|
2005-12-13 06:32:10 +00:00
|
|
|
/// StaticCtorsSection - This is the directive that is emitted to switch to
|
|
|
|
/// a section to emit the static constructor list.
|
|
|
|
/// Defaults to "\t.section .ctors,\"aw\",@progbits".
|
|
|
|
const char *StaticCtorsSection;
|
|
|
|
|
|
|
|
/// StaticDtorsSection - This is the directive that is emitted to switch to
|
|
|
|
/// a section to emit the static destructor list.
|
|
|
|
/// Defaults to "\t.section .dtors,\"aw\",@progbits".
|
|
|
|
const char *StaticDtorsSection;
|
|
|
|
|
2005-11-21 19:51:51 +00:00
|
|
|
//===--- Global Variable Emission Directives --------------------------===//
|
|
|
|
|
|
|
|
/// LCOMMDirective - This is the name of a directive (if supported) that can
|
|
|
|
/// be used to efficiently declare a local (internal) block of zero
|
|
|
|
/// initialized data in the .bss/.data section. The syntax expected is:
|
2006-05-19 19:07:54 +00:00
|
|
|
/// \literal <LCOMMDirective> SYMBOLNAME LENGTHINBYTES, ALIGNMENT
|
|
|
|
/// \endliteral
|
2005-11-21 19:51:51 +00:00
|
|
|
const char *LCOMMDirective; // Defaults to null.
|
|
|
|
|
|
|
|
const char *COMMDirective; // Defaults to "\t.comm\t".
|
|
|
|
|
|
|
|
/// COMMDirectiveTakesAlignment - True if COMMDirective take a third
|
|
|
|
/// argument that specifies the alignment of the declaration.
|
|
|
|
bool COMMDirectiveTakesAlignment; // Defaults to true.
|
2005-11-21 23:06:08 +00:00
|
|
|
|
|
|
|
/// HasDotTypeDotSizeDirective - True if the target has .type and .size
|
|
|
|
/// directives, this is true for most ELF targets.
|
|
|
|
bool HasDotTypeDotSizeDirective; // Defaults to true.
|
2006-01-04 22:28:25 +00:00
|
|
|
|
|
|
|
protected:
|
2005-12-13 06:32:10 +00:00
|
|
|
AsmPrinter(std::ostream &o, TargetMachine &TM);
|
|
|
|
|
2006-01-04 13:52:30 +00:00
|
|
|
public:
|
2006-05-09 04:59:30 +00:00
|
|
|
/// SwitchToTextSection - 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
|
2005-11-21 07:05:42 +00:00
|
|
|
/// explicitly requested section, we switch to the section indicated for the
|
|
|
|
/// global instead of NewSection.
|
|
|
|
///
|
|
|
|
/// If the new section is an empty string, this method forgets what the
|
|
|
|
/// current section is, but does not emit a .section directive.
|
|
|
|
///
|
2006-05-09 04:59:30 +00:00
|
|
|
/// This method is used when about to emit executable code.
|
|
|
|
///
|
|
|
|
void SwitchToTextSection(const char *NewSection, const GlobalValue *GV);
|
2005-11-21 08:12:47 +00:00
|
|
|
|
2006-05-09 04:59:30 +00:00
|
|
|
/// 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
|
|
|
|
/// explicitly requested section, we switch to the section indicated for the
|
|
|
|
/// global instead of NewSection.
|
|
|
|
///
|
|
|
|
/// If the new section is an empty string, this method forgets what the
|
|
|
|
/// current section is, but does not emit a .section directive.
|
|
|
|
///
|
|
|
|
/// This method is used when about to emit data. For most assemblers, this
|
|
|
|
/// is the same as the SwitchToTextSection method, but not all assemblers
|
|
|
|
/// are the same.
|
|
|
|
///
|
|
|
|
void SwitchToDataSection(const char *NewSection, const GlobalValue *GV);
|
|
|
|
|
2006-02-05 01:24:06 +00:00
|
|
|
/// 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;
|
2006-01-04 13:52:30 +00:00
|
|
|
protected:
|
2004-08-16 23:15:22 +00:00
|
|
|
/// 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);
|
2006-02-01 22:39:30 +00:00
|
|
|
|
|
|
|
/// PrintAsmOperand - Print the specified operand of MI, an INLINEASM
|
|
|
|
/// instruction, using the specified assembler variant. Targets should
|
2006-02-24 20:21:12 +00:00
|
|
|
/// override this to format as appropriate. This method can return true if
|
2006-02-01 22:39:30 +00:00
|
|
|
/// the operand is erroneous.
|
|
|
|
virtual bool PrintAsmOperand(const MachineInstr *MI, unsigned OpNo,
|
2006-02-06 22:16:41 +00:00
|
|
|
unsigned AsmVariant, const char *ExtraCode);
|
2006-01-04 22:28:25 +00:00
|
|
|
|
2006-02-24 20:21:12 +00:00
|
|
|
/// 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);
|
|
|
|
|
2005-11-21 07:51:06 +00:00
|
|
|
/// SetupMachineFunction - This should be called when a new MachineFunction
|
2004-08-16 23:15:22 +00:00
|
|
|
/// is being processed from runOnMachineFunction.
|
2005-11-21 07:51:06 +00:00
|
|
|
void SetupMachineFunction(MachineFunction &MF);
|
2005-11-21 08:24:11 +00:00
|
|
|
|
2006-02-01 22:39:30 +00:00
|
|
|
/// getFunctionNumber - Return a unique ID for the current function.
|
|
|
|
///
|
|
|
|
unsigned getFunctionNumber() const { return FunctionNumber; }
|
|
|
|
|
|
|
|
/// IncrementFunctionNumber - Increase Function Number. AsmPrinters should
|
|
|
|
/// not normally call this, as the counter is automatically bumped by
|
|
|
|
/// SetupMachineFunction.
|
|
|
|
void IncrementFunctionNumber() { FunctionNumber++; }
|
|
|
|
|
2005-12-13 06:32:10 +00:00
|
|
|
/// 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.
|
|
|
|
///
|
2006-06-28 00:52:32 +00:00
|
|
|
virtual void EmitConstantPool(MachineConstantPool *MCP);
|
2004-08-16 23:15:22 +00:00
|
|
|
|
2006-04-22 18:53:45 +00:00
|
|
|
/// EmitJumpTableInfo - Print assembly representations of the jump tables
|
|
|
|
/// used by the current function to the current output stream.
|
|
|
|
///
|
|
|
|
void EmitJumpTableInfo(MachineJumpTableInfo *MJTI);
|
|
|
|
|
2005-12-13 06:32:10 +00:00
|
|
|
/// 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);
|
|
|
|
|
2005-11-21 07:51:06 +00:00
|
|
|
/// EmitAlignment - Emit an alignment directive to the specified power of
|
2004-08-17 19:14:29 +00:00
|
|
|
/// two boundary. For example, if you pass in 3 here, you will get an 8
|
2005-11-14 19:00:06 +00:00
|
|
|
/// byte alignment. If a global value is specified, and if that global has
|
|
|
|
/// an explicit alignment requested, it will override the alignment request.
|
2005-11-21 07:51:06 +00:00
|
|
|
void EmitAlignment(unsigned NumBits, const GlobalValue *GV = 0) const;
|
2004-08-17 19:14:29 +00:00
|
|
|
|
2005-11-21 07:51:06 +00:00
|
|
|
/// EmitZeros - Emit a block of zeros.
|
2004-08-17 21:38:51 +00:00
|
|
|
///
|
2006-05-02 03:46:13 +00:00
|
|
|
void EmitZeros(uint64_t NumZeros) const;
|
2006-05-02 01:16:28 +00:00
|
|
|
|
|
|
|
/// EmitString - Emit a zero-byte-terminated string constant.
|
|
|
|
///
|
|
|
|
virtual void EmitString(const ConstantArray *CVA) const;
|
2004-08-17 21:38:51 +00:00
|
|
|
|
2005-11-21 07:51:06 +00:00
|
|
|
/// EmitConstantValueOnly - Print out the specified constant, without a
|
2004-08-16 23:15:22 +00:00
|
|
|
/// storage class. Only constants of first-class type are allowed here.
|
2005-11-21 07:51:06 +00:00
|
|
|
void EmitConstantValueOnly(const Constant *CV);
|
2004-08-17 06:36:27 +00:00
|
|
|
|
2005-11-21 07:51:06 +00:00
|
|
|
/// EmitGlobalConstant - Print a general LLVM constant to the .s file.
|
2004-08-17 06:36:27 +00:00
|
|
|
///
|
2005-11-21 07:51:06 +00:00
|
|
|
void EmitGlobalConstant(const Constant* CV);
|
2005-12-13 06:32:10 +00:00
|
|
|
|
2006-01-27 02:09:16 +00:00
|
|
|
/// printInlineAsm - This method formats and prints the specified machine
|
|
|
|
/// instruction that is an inline asm.
|
|
|
|
void printInlineAsm(const MachineInstr *MI) const;
|
2006-04-22 18:53:45 +00:00
|
|
|
|
|
|
|
/// printBasicBlockLabel - This method prints the label for the specified
|
|
|
|
/// MachineBasicBlock
|
2006-05-02 05:37:32 +00:00
|
|
|
virtual void printBasicBlockLabel(const MachineBasicBlock *MBB,
|
|
|
|
bool printColon = false,
|
|
|
|
bool printComment = true) const;
|
2006-04-22 18:53:45 +00:00
|
|
|
|
2005-12-13 06:32:10 +00:00
|
|
|
private:
|
|
|
|
void EmitXXStructorList(Constant *List);
|
2006-01-04 22:28:25 +00:00
|
|
|
|
2004-08-16 23:15:22 +00:00
|
|
|
};
|
|
|
|
}
|
|
|
|
|
|
|
|
#endif
|