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5d4918dbd1
foo = a - b .long foo instead of just .long a - b First, on darwin9 64 bits the assembler produces the wrong result. Second, if "a" is the end of the section all darwin assemblers (9, 10 and mc) will not consider a - b to be a constant but will if the dummy foo is created. Split how we handle these cases. The first one is something MC should take care of. The second one has to be handled by the caller. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@120889 91177308-0d34-0410-b5e6-96231b3b80d8
108 lines
2.9 KiB
C++
108 lines
2.9 KiB
C++
//===-- MCAsmInfo.cpp - Asm Info -------------------------------------------==//
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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 defines target asm properties related what form asm statements
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// should take.
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/MC/MCAsmInfo.h"
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#include "llvm/Support/DataTypes.h"
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#include <cctype>
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#include <cstring>
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using namespace llvm;
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MCAsmInfo::MCAsmInfo() {
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HasSubsectionsViaSymbols = false;
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HasMachoZeroFillDirective = false;
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HasMachoTBSSDirective = false;
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HasStaticCtorDtorReferenceInStaticMode = false;
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LinkerRequiresNonEmptyDwarfLines = false;
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MaxInstLength = 4;
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PCSymbol = "$";
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SeparatorChar = ';';
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CommentColumn = 40;
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CommentString = "#";
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LabelSuffix = ":";
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GlobalPrefix = "";
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PrivateGlobalPrefix = ".";
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LinkerPrivateGlobalPrefix = "";
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InlineAsmStart = "APP";
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InlineAsmEnd = "NO_APP";
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AssemblerDialect = 0;
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AllowQuotesInName = false;
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AllowNameToStartWithDigit = false;
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AllowPeriodsInName = true;
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ZeroDirective = "\t.zero\t";
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AsciiDirective = "\t.ascii\t";
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AscizDirective = "\t.asciz\t";
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Data8bitsDirective = "\t.byte\t";
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Data16bitsDirective = "\t.short\t";
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Data32bitsDirective = "\t.long\t";
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Data64bitsDirective = "\t.quad\t";
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SunStyleELFSectionSwitchSyntax = false;
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UsesELFSectionDirectiveForBSS = false;
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AlignDirective = "\t.align\t";
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AlignmentIsInBytes = true;
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TextAlignFillValue = 0;
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GPRel32Directive = 0;
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GlobalDirective = "\t.globl\t";
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HasSetDirective = true;
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NeedsSetToChangeDiffSize = false;
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HasLCOMMDirective = false;
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COMMDirectiveAlignmentIsInBytes = true;
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HasDotTypeDotSizeDirective = true;
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HasSingleParameterDotFile = true;
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HasNoDeadStrip = false;
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HasSymbolResolver = false;
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WeakRefDirective = 0;
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WeakDefDirective = 0;
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LinkOnceDirective = 0;
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HiddenVisibilityAttr = MCSA_Hidden;
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ProtectedVisibilityAttr = MCSA_Protected;
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HasLEB128 = false;
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SupportsDebugInformation = false;
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ExceptionsType = ExceptionHandling::None;
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DwarfRequiresFrameSection = true;
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DwarfUsesInlineInfoSection = false;
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DwarfUsesAbsoluteLabelForStmtList = true;
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DwarfSectionOffsetDirective = 0;
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DwarfUsesLabelOffsetForRanges = true;
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HasMicrosoftFastStdCallMangling = false;
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AsmTransCBE = 0;
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}
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MCAsmInfo::~MCAsmInfo() {
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}
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unsigned MCAsmInfo::getULEB128Size(unsigned Value) {
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unsigned Size = 0;
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do {
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Value >>= 7;
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Size += sizeof(int8_t);
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} while (Value);
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return Size;
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}
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unsigned MCAsmInfo::getSLEB128Size(int Value) {
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unsigned Size = 0;
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int Sign = Value >> (8 * sizeof(Value) - 1);
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bool IsMore;
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do {
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unsigned Byte = Value & 0x7f;
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Value >>= 7;
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IsMore = Value != Sign || ((Byte ^ Sign) & 0x40) != 0;
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Size += sizeof(int8_t);
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} while (IsMore);
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return Size;
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}
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