1 //===-- MCAsmInfo.cpp - Asm Info -------------------------------------------==//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file defines target asm properties related what form asm statements
13 //===----------------------------------------------------------------------===//
15 #include "llvm/MC/MCAsmInfo.h"
16 #include "llvm/MC/MCContext.h"
17 #include "llvm/MC/MCExpr.h"
18 #include "llvm/MC/MCStreamer.h"
19 #include "llvm/Support/DataTypes.h"
20 #include "llvm/Support/Dwarf.h"
25 MCAsmInfo::MCAsmInfo() {
27 CalleeSaveStackSlotSize = 4;
29 IsLittleEndian = true;
31 HasSubsectionsViaSymbols = false;
32 HasMachoZeroFillDirective = false;
33 HasMachoTBSSDirective = false;
34 HasStaticCtorDtorReferenceInStaticMode = false;
35 LinkerRequiresNonEmptyDwarfLines = false;
39 SeparatorString = ";";
42 UseAssignmentForEHBegin = false;
43 PrivateGlobalPrefix = "L";
44 LinkerPrivateGlobalPrefix = "";
45 InlineAsmStart = "APP";
46 InlineAsmEnd = "NO_APP";
47 Code16Directive = ".code16";
48 Code32Directive = ".code32";
49 Code64Directive = ".code64";
51 AllowAtInName = false;
52 UseDataRegionDirectives = false;
53 ZeroDirective = "\t.zero\t";
54 AsciiDirective = "\t.ascii\t";
55 AscizDirective = "\t.asciz\t";
56 Data8bitsDirective = "\t.byte\t";
57 Data16bitsDirective = "\t.short\t";
58 Data32bitsDirective = "\t.long\t";
59 Data64bitsDirective = "\t.quad\t";
60 SunStyleELFSectionSwitchSyntax = false;
61 UsesELFSectionDirectiveForBSS = false;
62 AlignmentIsInBytes = true;
63 TextAlignFillValue = 0;
64 GPRel64Directive = nullptr;
65 GPRel32Directive = nullptr;
66 GlobalDirective = "\t.globl\t";
67 HasSetDirective = true;
68 HasAggressiveSymbolFolding = true;
69 COMMDirectiveAlignmentIsInBytes = true;
70 LCOMMDirectiveAlignmentType = LCOMM::NoAlignment;
71 HasDotTypeDotSizeDirective = true;
72 HasSingleParameterDotFile = true;
73 HasIdentDirective = false;
74 HasNoDeadStrip = false;
75 WeakRefDirective = nullptr;
76 HasWeakDefDirective = false;
77 HasWeakDefCanBeHiddenDirective = false;
78 HasLinkOnceDirective = false;
79 HiddenVisibilityAttr = MCSA_Hidden;
80 HiddenDeclarationVisibilityAttr = MCSA_Hidden;
81 ProtectedVisibilityAttr = MCSA_Protected;
82 SupportsDebugInformation = false;
83 ExceptionsType = ExceptionHandling::None;
84 WinEHEncodingType = WinEH::EncodingType::Invalid;
85 DwarfUsesRelocationsAcrossSections = true;
86 DwarfFDESymbolsUseAbsDiff = false;
87 DwarfRegNumForCFI = false;
88 NeedsDwarfSectionOffsetDirective = false;
89 UseParensForSymbolVariant = false;
91 // FIXME: Clang's logic should be synced with the logic used to initialize
92 // this member and the two implementations should be merged.
94 // - Solaris always enables the integrated assembler by default
95 // - SparcELFMCAsmInfo and X86ELFMCAsmInfo are handling this case
96 // - Windows always enables the integrated assembler by default
97 // - MCAsmInfoCOFF is handling this case, should it be MCAsmInfoMicrosoft?
98 // - MachO targets always enables the integrated assembler by default
99 // - MCAsmInfoDarwin is handling this case
100 // - Generic_GCC toolchains enable the integrated assembler on a per
101 // architecture basis.
102 // - The target subclasses for AArch64, ARM, and X86 handle these cases
103 UseIntegratedAssembler = false;
105 CompressDebugSections = false;
108 MCAsmInfo::~MCAsmInfo() {
112 MCAsmInfo::getExprForPersonalitySymbol(const MCSymbol *Sym,
114 MCStreamer &Streamer) const {
115 return getExprForFDESymbol(Sym, Encoding, Streamer);
119 MCAsmInfo::getExprForFDESymbol(const MCSymbol *Sym,
121 MCStreamer &Streamer) const {
122 if (!(Encoding & dwarf::DW_EH_PE_pcrel))
123 return MCSymbolRefExpr::Create(Sym, Streamer.getContext());
125 MCContext &Context = Streamer.getContext();
126 const MCExpr *Res = MCSymbolRefExpr::Create(Sym, Context);
127 MCSymbol *PCSym = Context.CreateTempSymbol();
128 Streamer.EmitLabel(PCSym);
129 const MCExpr *PC = MCSymbolRefExpr::Create(PCSym, Context);
130 return MCBinaryExpr::CreateSub(Res, PC, Context);