Mercurial > hg > CbC > CbC_llvm
diff lib/MC/MCAsmInfo.cpp @ 0:95c75e76d11b LLVM3.4
LLVM 3.4
author | Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> |
---|---|
date | Thu, 12 Dec 2013 13:56:28 +0900 |
parents | |
children | e4204d083e25 |
line wrap: on
line diff
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/lib/MC/MCAsmInfo.cpp Thu Dec 12 13:56:28 2013 +0900 @@ -0,0 +1,140 @@ +//===-- MCAsmInfo.cpp - Asm Info -------------------------------------------==// +// +// The LLVM Compiler Infrastructure +// +// This file is distributed under the University of Illinois Open Source +// License. See LICENSE.TXT for details. +// +//===----------------------------------------------------------------------===// +// +// This file defines target asm properties related what form asm statements +// should take. +// +//===----------------------------------------------------------------------===// + +#include "llvm/MC/MCAsmInfo.h" +#include "llvm/MC/MCContext.h" +#include "llvm/MC/MCExpr.h" +#include "llvm/MC/MCStreamer.h" +#include "llvm/Support/DataTypes.h" +#include "llvm/Support/Dwarf.h" +#include <cctype> +#include <cstring> +using namespace llvm; + +MCAsmInfo::MCAsmInfo() { + PointerSize = 4; + CalleeSaveStackSlotSize = 4; + + IsLittleEndian = true; + StackGrowsUp = false; + HasSubsectionsViaSymbols = false; + HasMachoZeroFillDirective = false; + HasMachoTBSSDirective = false; + HasStaticCtorDtorReferenceInStaticMode = false; + LinkerRequiresNonEmptyDwarfLines = false; + MaxInstLength = 4; + MinInstAlignment = 1; + DollarIsPC = false; + SeparatorString = ";"; + CommentColumn = 40; + CommentString = "#"; + LabelSuffix = ":"; + DebugLabelSuffix = ":"; + GlobalPrefix = ""; + PrivateGlobalPrefix = "."; + LinkerPrivateGlobalPrefix = ""; + InlineAsmStart = "APP"; + InlineAsmEnd = "NO_APP"; + Code16Directive = ".code16"; + Code32Directive = ".code32"; + Code64Directive = ".code64"; + AssemblerDialect = 0; + AllowAtInName = false; + UseDataRegionDirectives = false; + ZeroDirective = "\t.zero\t"; + AsciiDirective = "\t.ascii\t"; + AscizDirective = "\t.asciz\t"; + Data8bitsDirective = "\t.byte\t"; + Data16bitsDirective = "\t.short\t"; + Data32bitsDirective = "\t.long\t"; + Data64bitsDirective = "\t.quad\t"; + SunStyleELFSectionSwitchSyntax = false; + UsesELFSectionDirectiveForBSS = false; + AlignDirective = "\t.align\t"; + AlignmentIsInBytes = true; + TextAlignFillValue = 0; + GPRel64Directive = 0; + GPRel32Directive = 0; + GlobalDirective = "\t.globl\t"; + HasSetDirective = true; + HasAggressiveSymbolFolding = true; + COMMDirectiveAlignmentIsInBytes = true; + LCOMMDirectiveAlignmentType = LCOMM::NoAlignment; + HasDotTypeDotSizeDirective = true; + HasSingleParameterDotFile = true; + HasIdentDirective = false; + HasNoDeadStrip = false; + WeakRefDirective = 0; + WeakDefDirective = 0; + LinkOnceDirective = 0; + HiddenVisibilityAttr = MCSA_Hidden; + HiddenDeclarationVisibilityAttr = MCSA_Hidden; + ProtectedVisibilityAttr = MCSA_Protected; + HasLEB128 = false; + SupportsDebugInformation = false; + ExceptionsType = ExceptionHandling::None; + DwarfUsesRelocationsAcrossSections = true; + DwarfRegNumForCFI = false; + HasMicrosoftFastStdCallMangling = false; + NeedsDwarfSectionOffsetDirective = false; +} + +MCAsmInfo::~MCAsmInfo() { +} + + +unsigned MCAsmInfo::getULEB128Size(uint64_t Value) { + unsigned Size = 0; + do { + Value >>= 7; + Size += sizeof(int8_t); + } while (Value); + return Size; +} + +unsigned MCAsmInfo::getSLEB128Size(int64_t Value) { + unsigned Size = 0; + int Sign = Value >> (8 * sizeof(Value) - 1); + bool IsMore; + + do { + unsigned Byte = Value & 0x7f; + Value >>= 7; + IsMore = Value != Sign || ((Byte ^ Sign) & 0x40) != 0; + Size += sizeof(int8_t); + } while (IsMore); + return Size; +} + +const MCExpr * +MCAsmInfo::getExprForPersonalitySymbol(const MCSymbol *Sym, + unsigned Encoding, + MCStreamer &Streamer) const { + return getExprForFDESymbol(Sym, Encoding, Streamer); +} + +const MCExpr * +MCAsmInfo::getExprForFDESymbol(const MCSymbol *Sym, + unsigned Encoding, + MCStreamer &Streamer) const { + if (!(Encoding & dwarf::DW_EH_PE_pcrel)) + return MCSymbolRefExpr::Create(Sym, Streamer.getContext()); + + MCContext &Context = Streamer.getContext(); + const MCExpr *Res = MCSymbolRefExpr::Create(Sym, Context); + MCSymbol *PCSym = Context.CreateTempSymbol(); + Streamer.EmitLabel(PCSym); + const MCExpr *PC = MCSymbolRefExpr::Create(PCSym, Context); + return MCBinaryExpr::CreateSub(Res, PC, Context); +}