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 IsLittleEndian = true;
29 HasSubsectionsViaSymbols = false;
30 HasMachoZeroFillDirective = false;
31 HasMachoTBSSDirective = false;
32 HasStaticCtorDtorReferenceInStaticMode = false;
33 LinkerRequiresNonEmptyDwarfLines = false;
36 SeparatorString = ";";
41 PrivateGlobalPrefix = ".";
42 LinkerPrivateGlobalPrefix = "";
43 InlineAsmStart = "APP";
44 InlineAsmEnd = "NO_APP";
45 Code16Directive = ".code16";
46 Code32Directive = ".code32";
47 Code64Directive = ".code64";
49 AllowQuotesInName = false;
50 AllowNameToStartWithDigit = false;
51 AllowPeriodsInName = true;
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";
65 SupportsDataRegions = false;
66 SunStyleELFSectionSwitchSyntax = false;
67 UsesELFSectionDirectiveForBSS = false;
68 AlignDirective = "\t.align\t";
69 AlignmentIsInBytes = true;
70 TextAlignFillValue = 0;
73 GlobalDirective = "\t.globl\t";
74 HasSetDirective = true;
75 HasAggressiveSymbolFolding = true;
76 LCOMMDirectiveType = LCOMM::None;
77 COMMDirectiveAlignmentIsInBytes = true;
78 HasDotTypeDotSizeDirective = true;
79 HasSingleParameterDotFile = true;
80 HasNoDeadStrip = false;
81 HasSymbolResolver = false;
84 LinkOnceDirective = 0;
85 HiddenVisibilityAttr = MCSA_Hidden;
86 HiddenDeclarationVisibilityAttr = MCSA_Hidden;
87 ProtectedVisibilityAttr = MCSA_Protected;
89 SupportsDebugInformation = false;
90 ExceptionsType = ExceptionHandling::None;
91 DwarfUsesInlineInfoSection = false;
92 DwarfRequiresRelocationForSectionOffset = true;
93 DwarfSectionOffsetDirective = 0;
94 DwarfUsesLabelOffsetForRanges = true;
95 DwarfUsesRelocationsForStringPool = true;
96 DwarfRegNumForCFI = false;
97 HasMicrosoftFastStdCallMangling = false;
100 MCAsmInfo::~MCAsmInfo() {
104 unsigned MCAsmInfo::getULEB128Size(unsigned Value) {
108 Size += sizeof(int8_t);
113 unsigned MCAsmInfo::getSLEB128Size(int Value) {
115 int Sign = Value >> (8 * sizeof(Value) - 1);
119 unsigned Byte = Value & 0x7f;
121 IsMore = Value != Sign || ((Byte ^ Sign) & 0x40) != 0;
122 Size += sizeof(int8_t);
128 MCAsmInfo::getExprForPersonalitySymbol(const MCSymbol *Sym,
130 MCStreamer &Streamer) const {
131 return getExprForFDESymbol(Sym, Encoding, Streamer);
135 MCAsmInfo::getExprForFDESymbol(const MCSymbol *Sym,
137 MCStreamer &Streamer) const {
138 if (!(Encoding & dwarf::DW_EH_PE_pcrel))
139 return MCSymbolRefExpr::Create(Sym, Streamer.getContext());
141 MCContext &Context = Streamer.getContext();
142 const MCExpr *Res = MCSymbolRefExpr::Create(Sym, Context);
143 MCSymbol *PCSym = Context.CreateTempSymbol();
144 Streamer.EmitLabel(PCSym);
145 const MCExpr *PC = MCSymbolRefExpr::Create(PCSym, Context);
146 return MCBinaryExpr::CreateSub(Res, PC, Context);