mirror of
https://github.com/RPCS3/llvm-mirror.git
synced 2024-10-28 14:32:51 +01:00
6f4e916c6a
on x86-64 linux. This causes no regressions on 32 bit linux and 32 bit ppc. More tests pass on 64 bit ppc with no regressions. I didn't turn on eh on 64 bit linux because the intrinsics needed to compile the eh runtime aren't done yet. But if you turn it on and link with the mainline runtime then eh seems to work fine on x86-64 linux with this patch. Thanks to Dale for testing. The main point of the patch is that if you output that some object is encoded using 4 bytes you had better not output 8 bytes for it: the patch makes everything consistent. llvm-svn: 50825
684 lines
25 KiB
C++
684 lines
25 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 is distributed under the University of Illinois Open Source
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// 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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// DWARF encoding query type
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namespace DwarfEncoding {
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enum Target {
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Data = 0,
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CodeLabels = 1,
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Functions = 2
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};
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}
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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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/// TLSDataSection - Section directive for Thread Local data.
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///
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const char *TLSDataSection;// Defaults to ".section .tdata,"awT",@progbits".
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/// TLSBSSSection - Section directive for Thread Local uninitialized data.
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/// Null if this target doesn't support a BSS section.
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///
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const char *TLSBSSSection;// Default to ".section .tbss,"awT",@nobits".
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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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/// NonexecutableStackDirective - Directive for declaring to the
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/// linker and beyond that the emitted code does not require stack
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/// memory to be executable.
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const char *NonexecutableStackDirective; // Default is null.
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/// NeedsSet - True if target asm treats expressions in data directives
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/// as linktime-relocatable. For assembly-time computation, we need to
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/// use a .set. Thus:
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/// .set w, x-y
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/// .long w
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/// is computed at assembly time, while
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/// .long x-y
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/// is relocated if the relative locations of x and y change at linktime.
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/// We want both these things in different places.
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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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/// PCSymbol - The symbol used to represent the current PC. Used in PC
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/// relative expressions.
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const char *PCSymbol; // Defaults to "$".
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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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/// @verbatim @fptr( ) @endverbatim
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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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/// PersonalityPrefix/Suffix - If these are nonempty, these strings will
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/// enclose any personality function in the common frame section.
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///
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const char *PersonalityPrefix; // Defaults to ""
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const char *PersonalitySuffix; // Defaults to ""
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/// NeedsIndirectEncoding - If set, we need to set the indirect encoding bit
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/// for EH in Dwarf.
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///
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bool NeedsIndirectEncoding; // Defaults to false
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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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/// TextAlignFillValue - If non-zero, this is used to fill the executable
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/// space created as the result of a alignment directive.
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unsigned TextAlignFillValue;
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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"
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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"
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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 (null 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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/// ReadOnlySection - This is the directive that is emitted to switch to a
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/// read-only section for constant data (e.g. data declared const,
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/// jump tables).
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const char *ReadOnlySection; // Defaults to NULL
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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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/// @verbatim <LCOMMDirective> SYMBOLNAME LENGTHINBYTES, ALIGNMENT
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/// @endverbatim
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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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/// WeakDefDirective - This directive, if non-null, is used to declare a
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/// global as being a weak defined symbol.
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const char *WeakDefDirective; // 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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/// ProtectedDirective - This directive, if non-null, is used to declare a
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/// global or function as having protected visibility.
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const char *ProtectedDirective; // Defaults to "\t.protected\t".
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//===--- Dwarf Emission Directives -----------------------------------===//
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/// AbsoluteDebugSectionOffsets - True if we should emit abolute section
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/// offsets for debug information. Defaults to false.
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bool AbsoluteDebugSectionOffsets;
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/// AbsoluteEHSectionOffsets - True if we should emit abolute section
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/// offsets for EH information. Defaults to false.
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bool AbsoluteEHSectionOffsets;
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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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/// hasDotLocAndDotFile - True if target asm supports .loc and .file
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/// directives for emitting debugging information.
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///
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bool HasDotLocAndDotFile; // Defaults to false.
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/// SupportsDebugInformation - True if target supports emission of debugging
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/// information.
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bool SupportsDebugInformation;
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/// SupportsExceptionHandling - True if target supports
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/// 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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/// GlobalEHDirective - This is the directive used to make exception frame
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/// tables globally visible.
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///
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const char *GlobalEHDirective; // Defaults to NULL.
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/// SupportsWeakEmptyEHFrame - True if target assembler and linker will
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/// handle a weak_definition of constant 0 for an omitted EH frame.
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bool SupportsWeakOmittedEHFrame; // Defaults to true.
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/// DwarfSectionOffsetDirective - Special section offset directive.
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const char* DwarfSectionOffsetDirective; // Defaults to NULL
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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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/// DwarfEHFrameSection - Section directive for Exception frames.
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///
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const char *DwarfEHFrameSection; // Defaults to ".eh_frame".
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/// DwarfExceptionSection - Section directive for Exception table.
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///
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const char *DwarfExceptionSection; // Defaults to ".gcc_except_table".
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//===--- CBE Asm Translation Table -----------------------------------===//
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const char *const *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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virtual 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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/// PreferredEHDataFormat - This hook allows the target to select data
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/// format used for encoding pointers in exception handling data. Reason is
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/// 0 for data, 1 for code labels, 2 for function pointers. Global is true
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/// if the symbol can be relocated.
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virtual unsigned PreferredEHDataFormat(DwarfEncoding::Target Reason,
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bool Global) const;
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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 *getTLSDataSection() const {
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return TLSDataSection;
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}
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const char *getTLSBSSSection() const {
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return TLSBSSSection;
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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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const char *getNonexecutableStackDirective() const {
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return NonexecutableStackDirective;
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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 *getPCSymbol() const {
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return PCSymbol;
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}
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char getSeparatorChar() const {
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return SeparatorChar;
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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 *getPersonalityPrefix() const {
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return PersonalityPrefix;
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}
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const char *getPersonalitySuffix() const {
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return PersonalitySuffix;
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}
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|
bool getNeedsIndirectEncoding() const {
|
|
return NeedsIndirectEncoding;
|
|
}
|
|
const char *getInlineAsmStart() const {
|
|
return InlineAsmStart;
|
|
}
|
|
const char *getInlineAsmEnd() const {
|
|
return InlineAsmEnd;
|
|
}
|
|
unsigned getAssemblerDialect() const {
|
|
return AssemblerDialect;
|
|
}
|
|
const char *getZeroDirective() const {
|
|
return ZeroDirective;
|
|
}
|
|
const char *getZeroDirectiveSuffix() const {
|
|
return ZeroDirectiveSuffix;
|
|
}
|
|
const char *getAsciiDirective() const {
|
|
return AsciiDirective;
|
|
}
|
|
const char *getAscizDirective() const {
|
|
return AscizDirective;
|
|
}
|
|
const char *getData8bitsDirective() const {
|
|
return Data8bitsDirective;
|
|
}
|
|
const char *getData16bitsDirective() const {
|
|
return Data16bitsDirective;
|
|
}
|
|
const char *getData32bitsDirective() const {
|
|
return Data32bitsDirective;
|
|
}
|
|
const char *getData64bitsDirective() const {
|
|
return Data64bitsDirective;
|
|
}
|
|
const char *getJumpTableDirective() const {
|
|
return JumpTableDirective;
|
|
}
|
|
const char *getAlignDirective() const {
|
|
return AlignDirective;
|
|
}
|
|
bool getAlignmentIsInBytes() const {
|
|
return AlignmentIsInBytes;
|
|
}
|
|
unsigned getTextAlignFillValue() const {
|
|
return TextAlignFillValue;
|
|
}
|
|
const char *getSwitchToSectionDirective() const {
|
|
return SwitchToSectionDirective;
|
|
}
|
|
const char *getTextSectionStartSuffix() const {
|
|
return TextSectionStartSuffix;
|
|
}
|
|
const char *getDataSectionStartSuffix() const {
|
|
return DataSectionStartSuffix;
|
|
}
|
|
const char *getSectionEndDirectiveSuffix() const {
|
|
return SectionEndDirectiveSuffix;
|
|
}
|
|
const char *getConstantPoolSection() const {
|
|
return ConstantPoolSection;
|
|
}
|
|
const char *getJumpTableDataSection() const {
|
|
return JumpTableDataSection;
|
|
}
|
|
const char *getCStringSection() const {
|
|
return CStringSection;
|
|
}
|
|
const char *getStaticCtorsSection() const {
|
|
return StaticCtorsSection;
|
|
}
|
|
const char *getStaticDtorsSection() const {
|
|
return StaticDtorsSection;
|
|
}
|
|
const char *getFourByteConstantSection() const {
|
|
return FourByteConstantSection;
|
|
}
|
|
const char *getEightByteConstantSection() const {
|
|
return EightByteConstantSection;
|
|
}
|
|
const char *getSixteenByteConstantSection() const {
|
|
return SixteenByteConstantSection;
|
|
}
|
|
const char *getReadOnlySection() const {
|
|
return ReadOnlySection;
|
|
}
|
|
const char *getGlobalDirective() const {
|
|
return GlobalDirective;
|
|
}
|
|
const char *getSetDirective() const {
|
|
return SetDirective;
|
|
}
|
|
const char *getLCOMMDirective() const {
|
|
return LCOMMDirective;
|
|
}
|
|
const char *getCOMMDirective() const {
|
|
return COMMDirective;
|
|
}
|
|
bool getCOMMDirectiveTakesAlignment() const {
|
|
return COMMDirectiveTakesAlignment;
|
|
}
|
|
bool hasDotTypeDotSizeDirective() const {
|
|
return HasDotTypeDotSizeDirective;
|
|
}
|
|
const char *getUsedDirective() const {
|
|
return UsedDirective;
|
|
}
|
|
const char *getWeakRefDirective() const {
|
|
return WeakRefDirective;
|
|
}
|
|
const char *getWeakDefDirective() const {
|
|
return WeakDefDirective;
|
|
}
|
|
const char *getHiddenDirective() const {
|
|
return HiddenDirective;
|
|
}
|
|
const char *getProtectedDirective() const {
|
|
return ProtectedDirective;
|
|
}
|
|
bool isAbsoluteDebugSectionOffsets() const {
|
|
return AbsoluteDebugSectionOffsets;
|
|
}
|
|
bool isAbsoluteEHSectionOffsets() const {
|
|
return AbsoluteEHSectionOffsets;
|
|
}
|
|
bool hasLEB128() const {
|
|
return HasLEB128;
|
|
}
|
|
bool hasDotLocAndDotFile() const {
|
|
return HasDotLocAndDotFile;
|
|
}
|
|
bool doesSupportDebugInformation() const {
|
|
return SupportsDebugInformation;
|
|
}
|
|
bool doesSupportExceptionHandling() const {
|
|
return SupportsExceptionHandling;
|
|
}
|
|
bool doesDwarfRequireFrameSection() const {
|
|
return DwarfRequiresFrameSection;
|
|
}
|
|
const char *getGlobalEHDirective() const {
|
|
return GlobalEHDirective;
|
|
}
|
|
bool getSupportsWeakOmittedEHFrame() const {
|
|
return SupportsWeakOmittedEHFrame;
|
|
}
|
|
const char *getDwarfSectionOffsetDirective() const {
|
|
return DwarfSectionOffsetDirective;
|
|
}
|
|
const char *getDwarfAbbrevSection() const {
|
|
return DwarfAbbrevSection;
|
|
}
|
|
const char *getDwarfInfoSection() const {
|
|
return DwarfInfoSection;
|
|
}
|
|
const char *getDwarfLineSection() const {
|
|
return DwarfLineSection;
|
|
}
|
|
const char *getDwarfFrameSection() const {
|
|
return DwarfFrameSection;
|
|
}
|
|
const char *getDwarfPubNamesSection() const {
|
|
return DwarfPubNamesSection;
|
|
}
|
|
const char *getDwarfPubTypesSection() const {
|
|
return DwarfPubTypesSection;
|
|
}
|
|
const char *getDwarfStrSection() const {
|
|
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 *getDwarfEHFrameSection() const {
|
|
return DwarfEHFrameSection;
|
|
}
|
|
const char *getDwarfExceptionSection() const {
|
|
return DwarfExceptionSection;
|
|
}
|
|
const char *const *getAsmCBE() const {
|
|
return AsmTransCBE;
|
|
}
|
|
};
|
|
}
|
|
|
|
#endif
|
|
|