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428ac54894
assembler names of string constants look like. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@51909 91177308-0d34-0410-b5e6-96231b3b80d8
145 lines
4.5 KiB
C++
145 lines
4.5 KiB
C++
//===-- TargetAsmInfo.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/Target/TargetAsmInfo.h"
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#include "llvm/Support/Dwarf.h"
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#include <cctype>
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#include <cstring>
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using namespace llvm;
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TargetAsmInfo::TargetAsmInfo() :
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TextSection("\t.text"),
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DataSection("\t.data"),
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BSSSection("\t.bss"),
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TLSDataSection("\t.section .tdata,\"awT\",@progbits"),
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TLSBSSSection("\t.section .tbss,\"awT\",@nobits"),
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ZeroFillDirective(0),
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NonexecutableStackDirective(0),
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NeedsSet(false),
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MaxInstLength(4),
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PCSymbol("$"),
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SeparatorChar(';'),
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CommentString("#"),
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GlobalPrefix(""),
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PrivateGlobalPrefix("."),
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JumpTableSpecialLabelPrefix(0),
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GlobalVarAddrPrefix(""),
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GlobalVarAddrSuffix(""),
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FunctionAddrPrefix(""),
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FunctionAddrSuffix(""),
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PersonalityPrefix(""),
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PersonalitySuffix(""),
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NeedsIndirectEncoding(false),
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InlineAsmStart("#APP"),
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InlineAsmEnd("#NO_APP"),
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AssemblerDialect(0),
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StringConstantPrefix(".str"),
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ZeroDirective("\t.zero\t"),
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ZeroDirectiveSuffix(0),
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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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AlignDirective("\t.align\t"),
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AlignmentIsInBytes(true),
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TextAlignFillValue(0),
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SwitchToSectionDirective("\t.section\t"),
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TextSectionStartSuffix(""),
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DataSectionStartSuffix(""),
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SectionEndDirectiveSuffix(0),
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ConstantPoolSection("\t.section .rodata"),
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JumpTableDataSection("\t.section .rodata"),
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JumpTableDirective(0),
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CStringSection(0),
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StaticCtorsSection("\t.section .ctors,\"aw\",@progbits"),
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StaticDtorsSection("\t.section .dtors,\"aw\",@progbits"),
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FourByteConstantSection(0),
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EightByteConstantSection(0),
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SixteenByteConstantSection(0),
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ReadOnlySection(0),
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GlobalDirective("\t.globl\t"),
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SetDirective(0),
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LCOMMDirective(0),
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COMMDirective("\t.comm\t"),
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COMMDirectiveTakesAlignment(true),
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HasDotTypeDotSizeDirective(true),
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UsedDirective(0),
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WeakRefDirective(0),
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WeakDefDirective(0),
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HiddenDirective("\t.hidden\t"),
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ProtectedDirective("\t.protected\t"),
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AbsoluteDebugSectionOffsets(false),
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AbsoluteEHSectionOffsets(false),
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HasLEB128(false),
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HasDotLocAndDotFile(false),
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SupportsDebugInformation(false),
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SupportsExceptionHandling(false),
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DwarfRequiresFrameSection(true),
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GlobalEHDirective(0),
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SupportsWeakOmittedEHFrame(true),
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DwarfSectionOffsetDirective(0),
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DwarfAbbrevSection(".debug_abbrev"),
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DwarfInfoSection(".debug_info"),
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DwarfLineSection(".debug_line"),
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DwarfFrameSection(".debug_frame"),
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DwarfPubNamesSection(".debug_pubnames"),
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DwarfPubTypesSection(".debug_pubtypes"),
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DwarfStrSection(".debug_str"),
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DwarfLocSection(".debug_loc"),
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DwarfARangesSection(".debug_aranges"),
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DwarfRangesSection(".debug_ranges"),
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DwarfMacInfoSection(".debug_macinfo"),
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DwarfEHFrameSection(".eh_frame"),
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DwarfExceptionSection(".gcc_except_table"),
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AsmTransCBE(0) {
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}
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TargetAsmInfo::~TargetAsmInfo() {
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}
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/// Measure the specified inline asm to determine an approximation of its
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/// length.
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/// Comments (which run till the next SeparatorChar or newline) do not
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/// count as an instruction.
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/// Any other non-whitespace text is considered an instruction, with
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/// multiple instructions separated by SeparatorChar or newlines.
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/// Variable-length instructions are not handled here; this function
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/// may be overloaded in the target code to do that.
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unsigned TargetAsmInfo::getInlineAsmLength(const char *Str) const {
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// Count the number of instructions in the asm.
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bool atInsnStart = true;
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unsigned Length = 0;
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for (; *Str; ++Str) {
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if (*Str == '\n' || *Str == SeparatorChar)
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atInsnStart = true;
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if (atInsnStart && !isspace(*Str)) {
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Length += MaxInstLength;
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atInsnStart = false;
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}
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if (atInsnStart && strncmp(Str, CommentString, strlen(CommentString))==0)
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atInsnStart = false;
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}
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return Length;
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}
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unsigned TargetAsmInfo::PreferredEHDataFormat(DwarfEncoding::Target Reason,
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bool Global) const {
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return dwarf::DW_EH_PE_absptr;
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}
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