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534 lines
20 KiB
C++
534 lines
20 KiB
C++
//===-- llvm/Target/TargetAsmInfo.h - Asm info ------------------*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file was developed by James M. Laskey and is distributed under
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// the University of Illinois Open Source License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file contains a class to be used as the basis for target specific
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// asm writers. This class primarily takes care of global printing constants,
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// which are used in very similar ways across all targets.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_TARGET_ASM_INFO_H
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#define LLVM_TARGET_ASM_INFO_H
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#include "llvm/CodeGen/MachineFunctionPass.h"
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#include "llvm/Support/DataTypes.h"
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namespace llvm {
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class TargetMachine;
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class CallInst;
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/// TargetAsmInfo - This class is intended to be used as a base class for asm
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/// properties and features specific to the target.
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class TargetAsmInfo {
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protected:
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//===------------------------------------------------------------------===//
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// Properties to be set by the target writer, used to configure asm printer.
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//
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/// TextSection - Section directive for standard text.
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///
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const char *TextSection; // Defaults to ".text".
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/// DataSection - Section directive for standard data.
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///
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const char *DataSection; // Defaults to ".data".
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/// BSSSection - Section directive for uninitialized data. Null if this
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/// target doesn't support a BSS section.
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///
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const char *BSSSection; // Default to ".bss".
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/// ZeroFillDirective - Directive for emitting a global to the ZeroFill
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/// section on this target. Null if this target doesn't support zerofill.
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const char *ZeroFillDirective; // Default is null.
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/// AddressSize - Size of addresses used in file.
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///
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unsigned AddressSize; // Defaults to 4.
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/// NeedsSet - True if target asm can't compute addresses on data
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/// directives.
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bool NeedsSet; // Defaults to false.
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/// MaxInstLength - This is the maximum possible length of an instruction,
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/// which is needed to compute the size of an inline asm.
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unsigned MaxInstLength; // Defaults to 4.
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/// SeparatorChar - This character, if specified, is used to separate
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/// instructions from each other when on the same line. This is used to
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/// measure inline asm instructions.
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char SeparatorChar; // Defaults to ';'
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/// CommentString - This indicates the comment character used by the
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/// assembler.
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const char *CommentString; // Defaults to "#"
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/// GlobalPrefix - If this is set to a non-empty string, it is prepended
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/// onto all global symbols. This is often used for "_" or ".".
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const char *GlobalPrefix; // Defaults to ""
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/// PrivateGlobalPrefix - This prefix is used for globals like constant
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/// pool entries that are completely private to the .o file and should not
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/// have names in the .o file. This is often "." or "L".
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const char *PrivateGlobalPrefix; // Defaults to "."
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/// JumpTableSpecialLabelPrefix - If not null, a extra (dead) label is
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/// emitted before jump tables with the specified prefix.
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const char *JumpTableSpecialLabelPrefix; // Default to null.
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/// GlobalVarAddrPrefix/Suffix - If these are nonempty, these strings
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/// will enclose any GlobalVariable (that isn't a function)
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///
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const char *GlobalVarAddrPrefix; // Defaults to ""
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const char *GlobalVarAddrSuffix; // Defaults to ""
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/// FunctionAddrPrefix/Suffix - If these are nonempty, these strings
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/// will enclose any GlobalVariable that points to a function.
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/// For example, this is used by the IA64 backend to materialize
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/// function descriptors, by decorating the ".data8" object with the
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/// \literal @fptr( ) \endliteral
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/// link-relocation operator.
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///
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const char *FunctionAddrPrefix; // Defaults to ""
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const char *FunctionAddrSuffix; // Defaults to ""
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/// InlineAsmStart/End - If these are nonempty, they contain a directive to
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/// emit before and after an inline assembly statement.
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const char *InlineAsmStart; // Defaults to "#APP\n"
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const char *InlineAsmEnd; // Defaults to "#NO_APP\n"
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/// AssemblerDialect - Which dialect of an assembler variant to use.
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unsigned AssemblerDialect; // Defaults to 0
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//===--- Data Emission Directives -------------------------------------===//
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/// ZeroDirective - this should be set to the directive used to get some
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/// number of zero bytes emitted to the current section. Common cases are
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/// "\t.zero\t" and "\t.space\t". If this is set to null, the
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/// Data*bitsDirective's will be used to emit zero bytes.
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const char *ZeroDirective; // Defaults to "\t.zero\t"
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const char *ZeroDirectiveSuffix; // Defaults to ""
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/// AsciiDirective - This directive allows emission of an ascii string with
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/// the standard C escape characters embedded into it.
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const char *AsciiDirective; // Defaults to "\t.ascii\t"
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/// AscizDirective - If not null, this allows for special handling of
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/// zero terminated strings on this target. This is commonly supported as
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/// ".asciz". If a target doesn't support this, it can be set to null.
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const char *AscizDirective; // Defaults to "\t.asciz\t"
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/// DataDirectives - These directives are used to output some unit of
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/// integer data to the current section. If a data directive is set to
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/// null, smaller data directives will be used to emit the large sizes.
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const char *Data8bitsDirective; // Defaults to "\t.byte\t"
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const char *Data16bitsDirective; // Defaults to "\t.short\t"
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const char *Data32bitsDirective; // Defaults to "\t.long\t"
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const char *Data64bitsDirective; // Defaults to "\t.quad\t"
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//===--- Alignment Information ----------------------------------------===//
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/// AlignDirective - The directive used to emit round up to an alignment
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/// boundary.
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///
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const char *AlignDirective; // Defaults to "\t.align\t"
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/// AlignmentIsInBytes - If this is true (the default) then the asmprinter
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/// emits ".align N" directives, where N is the number of bytes to align to.
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/// Otherwise, it emits ".align log2(N)", e.g. 3 to align to an 8 byte
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/// boundary.
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bool AlignmentIsInBytes; // Defaults to true
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//===--- Section Switching Directives ---------------------------------===//
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/// SwitchToSectionDirective - This is the directive used when we want to
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/// emit a global to an arbitrary section. The section name is emited after
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/// this.
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const char *SwitchToSectionDirective; // Defaults to "\t.section\t"
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/// TextSectionStartSuffix - This is printed after each start of section
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/// directive for text sections.
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const char *TextSectionStartSuffix; // Defaults to "".
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/// DataSectionStartSuffix - This is printed after each start of section
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/// directive for data sections.
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const char *DataSectionStartSuffix; // Defaults to "".
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/// SectionEndDirectiveSuffix - If non-null, the asm printer will close each
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/// section with the section name and this suffix printed.
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const char *SectionEndDirectiveSuffix;// Defaults to null.
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/// ConstantPoolSection - This is the section that we SwitchToSection right
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/// before emitting the constant pool for a function.
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const char *ConstantPoolSection; // Defaults to "\t.section .rodata\n"
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/// JumpTableDataSection - This is the section that we SwitchToSection right
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/// before emitting the jump tables for a function when the relocation model
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/// is not PIC.
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const char *JumpTableDataSection; // Defaults to "\t.section .rodata\n"
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/// JumpTableDirective - if non-null, the directive to emit before a jump
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/// table.
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const char *JumpTableDirective;
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/// CStringSection - If not null, this allows for special handling of
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/// cstring constants (\0 terminated string that does not contain any
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/// other null bytes) on this target. This is commonly supported as
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/// ".cstring".
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const char *CStringSection; // Defaults to NULL
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/// StaticCtorsSection - This is the directive that is emitted to switch to
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/// a section to emit the static constructor list.
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/// Defaults to "\t.section .ctors,\"aw\",@progbits".
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const char *StaticCtorsSection;
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/// StaticDtorsSection - This is the directive that is emitted to switch to
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/// a section to emit the static destructor list.
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/// Defaults to "\t.section .dtors,\"aw\",@progbits".
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const char *StaticDtorsSection;
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/// FourByteConstantSection, EightByteConstantSection,
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/// SixteenByteConstantSection - These are special sections where we place
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/// 4-, 8-, and 16- byte constant literals.
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const char *FourByteConstantSection;
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const char *EightByteConstantSection;
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const char *SixteenByteConstantSection;
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//===--- Global Variable Emission Directives --------------------------===//
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/// GlobalDirective - This is the directive used to declare a global entity.
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///
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const char *GlobalDirective; // Defaults to NULL.
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/// SetDirective - This is the name of a directive that can be used to tell
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/// the assembler to set the value of a variable to some expression.
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const char *SetDirective; // Defaults to null.
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/// LCOMMDirective - This is the name of a directive (if supported) that can
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/// be used to efficiently declare a local (internal) block of zero
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/// initialized data in the .bss/.data section. The syntax expected is:
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/// \literal <LCOMMDirective> SYMBOLNAME LENGTHINBYTES, ALIGNMENT
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/// \endliteral
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const char *LCOMMDirective; // Defaults to null.
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const char *COMMDirective; // Defaults to "\t.comm\t".
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/// COMMDirectiveTakesAlignment - True if COMMDirective take a third
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/// argument that specifies the alignment of the declaration.
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bool COMMDirectiveTakesAlignment; // Defaults to true.
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/// HasDotTypeDotSizeDirective - True if the target has .type and .size
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/// directives, this is true for most ELF targets.
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bool HasDotTypeDotSizeDirective; // Defaults to true.
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/// UsedDirective - This directive, if non-null, is used to declare a global
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/// as being used somehow that the assembler can't see. This prevents dead
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/// code elimination on some targets.
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const char *UsedDirective; // Defaults to null.
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/// WeakRefDirective - This directive, if non-null, is used to declare a
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/// global as being a weak undefined symbol.
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const char *WeakRefDirective; // Defaults to null.
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/// HiddenDirective - This directive, if non-null, is used to declare a
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/// global or function as having hidden visibility.
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const char *HiddenDirective; // Defaults to "\t.hidden\t".
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//===--- Dwarf Emission Directives -----------------------------------===//
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/// HasLEB128 - True if target asm supports leb128 directives.
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///
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bool HasLEB128; // Defaults to false.
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/// hasDotLoc - True if target asm supports .loc directives.
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///
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bool HasDotLoc; // Defaults to false.
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/// HasDotFile - True if target asm supports .file directives.
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///
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bool HasDotFile; // Defaults to false.
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/// SupportsExceptionHandling - True if target supports exception handling.
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///
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bool SupportsExceptionHandling; // Defaults to false.
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/// RequiresFrameSection - true if the Dwarf2 output needs a frame section
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///
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bool DwarfRequiresFrameSection; // Defaults to true.
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/// DwarfAbbrevSection - Section directive for Dwarf abbrev.
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///
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const char *DwarfAbbrevSection; // Defaults to ".debug_abbrev".
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/// DwarfInfoSection - Section directive for Dwarf info.
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///
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const char *DwarfInfoSection; // Defaults to ".debug_info".
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/// DwarfLineSection - Section directive for Dwarf info.
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///
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const char *DwarfLineSection; // Defaults to ".debug_line".
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/// DwarfFrameSection - Section directive for Dwarf info.
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///
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const char *DwarfFrameSection; // Defaults to ".debug_frame".
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/// DwarfPubNamesSection - Section directive for Dwarf info.
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///
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const char *DwarfPubNamesSection; // Defaults to ".debug_pubnames".
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/// DwarfPubTypesSection - Section directive for Dwarf info.
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///
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const char *DwarfPubTypesSection; // Defaults to ".debug_pubtypes".
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/// DwarfStrSection - Section directive for Dwarf info.
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///
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const char *DwarfStrSection; // Defaults to ".debug_str".
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/// DwarfLocSection - Section directive for Dwarf info.
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///
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const char *DwarfLocSection; // Defaults to ".debug_loc".
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/// DwarfARangesSection - Section directive for Dwarf info.
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///
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const char *DwarfARangesSection; // Defaults to ".debug_aranges".
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/// DwarfRangesSection - Section directive for Dwarf info.
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///
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const char *DwarfRangesSection; // Defaults to ".debug_ranges".
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/// DwarfMacInfoSection - Section directive for Dwarf info.
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///
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const char *DwarfMacInfoSection; // Defaults to ".debug_macinfo".
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//===--- CBE Asm Translation Table -----------------------------------===//
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const char** AsmTransCBE; // Defaults to empty
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public:
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TargetAsmInfo();
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virtual ~TargetAsmInfo();
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/// Measure the specified inline asm to determine an approximation of its
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/// length.
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unsigned getInlineAsmLength(const char *Str) const;
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/// ExpandInlineAsm - This hook allows the target to expand an inline asm
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/// call to be explicit llvm code if it wants to. This is useful for
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/// turning simple inline asms into LLVM intrinsics, which gives the
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/// compiler more information about the behavior of the code.
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virtual bool ExpandInlineAsm(CallInst *CI) const {
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return false;
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}
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// Accessors.
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//
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const char *getTextSection() const {
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return TextSection;
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}
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const char *getDataSection() const {
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return DataSection;
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}
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const char *getBSSSection() const {
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return BSSSection;
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}
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const char *getZeroFillDirective() const {
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return ZeroFillDirective;
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}
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unsigned getAddressSize() const {
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return AddressSize;
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}
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bool needsSet() const {
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return NeedsSet;
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}
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const char *getCommentString() const {
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return CommentString;
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}
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const char *getGlobalPrefix() const {
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return GlobalPrefix;
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}
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const char *getPrivateGlobalPrefix() const {
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return PrivateGlobalPrefix;
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}
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const char *getJumpTableSpecialLabelPrefix() const {
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return JumpTableSpecialLabelPrefix;
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}
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const char *getGlobalVarAddrPrefix() const {
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return GlobalVarAddrPrefix;
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}
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const char *getGlobalVarAddrSuffix() const {
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return GlobalVarAddrSuffix;
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}
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const char *getFunctionAddrPrefix() const {
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return FunctionAddrPrefix;
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}
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const char *getFunctionAddrSuffix() const {
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return FunctionAddrSuffix;
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}
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const char *getInlineAsmStart() const {
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return InlineAsmStart;
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}
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const char *getInlineAsmEnd() const {
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return InlineAsmEnd;
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}
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unsigned getAssemblerDialect() const {
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return AssemblerDialect;
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}
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const char *getZeroDirective() const {
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return ZeroDirective;
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}
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const char *getZeroDirectiveSuffix() const {
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return ZeroDirectiveSuffix;
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}
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const char *getAsciiDirective() const {
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return AsciiDirective;
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}
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const char *getAscizDirective() const {
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return AscizDirective;
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}
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const char *getData8bitsDirective() const {
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return Data8bitsDirective;
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}
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const char *getData16bitsDirective() const {
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return Data16bitsDirective;
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}
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const char *getData32bitsDirective() const {
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return Data32bitsDirective;
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}
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const char *getData64bitsDirective() const {
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return Data64bitsDirective;
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}
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const char *getJumpTableDirective() const {
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return JumpTableDirective;
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}
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const char *getAlignDirective() const {
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return AlignDirective;
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}
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bool getAlignmentIsInBytes() const {
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return AlignmentIsInBytes;
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}
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const char *getSwitchToSectionDirective() const {
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return SwitchToSectionDirective;
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}
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const char *getTextSectionStartSuffix() const {
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return TextSectionStartSuffix;
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}
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const char *getDataSectionStartSuffix() const {
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return DataSectionStartSuffix;
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}
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const char *getSectionEndDirectiveSuffix() const {
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return SectionEndDirectiveSuffix;
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}
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const char *getConstantPoolSection() const {
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return ConstantPoolSection;
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}
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const char *getJumpTableDataSection() const {
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return JumpTableDataSection;
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}
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const char *getCStringSection() const {
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return CStringSection;
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}
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const char *getStaticCtorsSection() const {
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return StaticCtorsSection;
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}
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const char *getStaticDtorsSection() const {
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return StaticDtorsSection;
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}
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const char *getFourByteConstantSection() const {
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return FourByteConstantSection;
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}
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const char *getEightByteConstantSection() const {
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return EightByteConstantSection;
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}
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const char *getSixteenByteConstantSection() const {
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return SixteenByteConstantSection;
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}
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const char *getGlobalDirective() const {
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return GlobalDirective;
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}
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const char *getSetDirective() const {
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return SetDirective;
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}
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const char *getLCOMMDirective() const {
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return LCOMMDirective;
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}
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const char *getCOMMDirective() const {
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return COMMDirective;
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}
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bool getCOMMDirectiveTakesAlignment() const {
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return COMMDirectiveTakesAlignment;
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}
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bool hasDotTypeDotSizeDirective() const {
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return HasDotTypeDotSizeDirective;
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}
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const char *getUsedDirective() const {
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return UsedDirective;
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}
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const char *getWeakRefDirective() const {
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return WeakRefDirective;
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}
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const char *getHiddenDirective() const {
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return HiddenDirective;
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}
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bool hasLEB128() const {
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return HasLEB128;
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}
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bool hasDotLoc() const {
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return HasDotLoc;
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}
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bool hasDotFile() const {
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return HasDotFile;
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}
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bool getSupportsExceptionHandling() const {
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return SupportsExceptionHandling;
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}
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bool getDwarfRequiresFrameSection() const {
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return DwarfRequiresFrameSection;
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}
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const char *getDwarfAbbrevSection() const {
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return DwarfAbbrevSection;
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}
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const char *getDwarfInfoSection() const {
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return DwarfInfoSection;
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}
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const char *getDwarfLineSection() const {
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return DwarfLineSection;
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}
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const char *getDwarfFrameSection() const {
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return DwarfFrameSection;
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}
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const char *getDwarfPubNamesSection() const {
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return DwarfPubNamesSection;
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}
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const char *getDwarfPubTypesSection() const {
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return DwarfPubTypesSection;
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}
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const char *getDwarfStrSection() const {
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return DwarfStrSection;
|
|
}
|
|
const char *getDwarfLocSection() const {
|
|
return DwarfLocSection;
|
|
}
|
|
const char *getDwarfARangesSection() const {
|
|
return DwarfARangesSection;
|
|
}
|
|
const char *getDwarfRangesSection() const {
|
|
return DwarfRangesSection;
|
|
}
|
|
const char *getDwarfMacInfoSection() const {
|
|
return DwarfMacInfoSection;
|
|
}
|
|
const char** getAsmCBE() const {
|
|
return AsmTransCBE;
|
|
}
|
|
};
|
|
}
|
|
|
|
#endif
|
|
|