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//===-- TargetAsmInfo.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/Target/TargetAsmInfo.h"
#include "llvm/Support/Dwarf.h"
#include <cctype>
#include <cstring>
using namespace llvm;
TargetAsmInfo::TargetAsmInfo() :
TextSection("\t.text"),
DataSection("\t.data"),
BSSSection("\t.bss"),
TLSDataSection("\t.section .tdata,\"awT\",@progbits"),
TLSBSSSection("\t.section .tbss,\"awT\",@nobits"),
ZeroFillDirective(0),
NonexecutableStackDirective(0),
NeedsSet(false),
MaxInstLength(4),
PCSymbol("$"),
SeparatorChar(';'),
CommentString("#"),
GlobalPrefix(""),
PrivateGlobalPrefix("."),
JumpTableSpecialLabelPrefix(0),
GlobalVarAddrPrefix(""),
GlobalVarAddrSuffix(""),
FunctionAddrPrefix(""),
FunctionAddrSuffix(""),
PersonalityPrefix(""),
PersonalitySuffix(""),
NeedsIndirectEncoding(false),
InlineAsmStart("#APP"),
InlineAsmEnd("#NO_APP"),
AssemblerDialect(0),
ZeroDirective("\t.zero\t"),
ZeroDirectiveSuffix(0),
AsciiDirective("\t.ascii\t"),
AscizDirective("\t.asciz\t"),
Data8bitsDirective("\t.byte\t"),
Data16bitsDirective("\t.short\t"),
Data32bitsDirective("\t.long\t"),
Data64bitsDirective("\t.quad\t"),
AlignDirective("\t.align\t"),
AlignmentIsInBytes(true),
TextAlignFillValue(0),
SwitchToSectionDirective("\t.section\t"),
TextSectionStartSuffix(""),
DataSectionStartSuffix(""),
SectionEndDirectiveSuffix(0),
ConstantPoolSection("\t.section .rodata"),
JumpTableDataSection("\t.section .rodata"),
JumpTableDirective(0),
CStringSection(0),
StaticCtorsSection("\t.section .ctors,\"aw\",@progbits"),
StaticDtorsSection("\t.section .dtors,\"aw\",@progbits"),
FourByteConstantSection(0),
EightByteConstantSection(0),
SixteenByteConstantSection(0),
ReadOnlySection(0),
GlobalDirective("\t.globl\t"),
SetDirective(0),
LCOMMDirective(0),
COMMDirective("\t.comm\t"),
COMMDirectiveTakesAlignment(true),
HasDotTypeDotSizeDirective(true),
UsedDirective(0),
WeakRefDirective(0),
WeakDefDirective(0),
HiddenDirective("\t.hidden\t"),
ProtectedDirective("\t.protected\t"),
AbsoluteDebugSectionOffsets(false),
AbsoluteEHSectionOffsets(false),
HasLEB128(false),
HasDotLocAndDotFile(false),
SupportsDebugInformation(false),
SupportsExceptionHandling(false),
DwarfRequiresFrameSection(true),
GlobalEHDirective(0),
SupportsWeakOmittedEHFrame(true),
DwarfSectionOffsetDirective(0),
DwarfAbbrevSection(".debug_abbrev"),
DwarfInfoSection(".debug_info"),
DwarfLineSection(".debug_line"),
DwarfFrameSection(".debug_frame"),
DwarfPubNamesSection(".debug_pubnames"),
DwarfPubTypesSection(".debug_pubtypes"),
DwarfStrSection(".debug_str"),
DwarfLocSection(".debug_loc"),
DwarfARangesSection(".debug_aranges"),
DwarfRangesSection(".debug_ranges"),
DwarfMacInfoSection(".debug_macinfo"),
DwarfEHFrameSection(".eh_frame"),
DwarfExceptionSection(".gcc_except_table"),
AsmTransCBE(0) {
}
TargetAsmInfo::~TargetAsmInfo() {
}
/// Measure the specified inline asm to determine an approximation of its
/// length.
/// Comments (which run till the next SeparatorChar or newline) do not
/// count as an instruction.
/// Any other non-whitespace text is considered an instruction, with
/// multiple instructions separated by SeparatorChar or newlines.
/// Variable-length instructions are not handled here; this function
/// may be overloaded in the target code to do that.
unsigned TargetAsmInfo::getInlineAsmLength(const char *Str) const {
// Count the number of instructions in the asm.
bool atInsnStart = true;
unsigned Length = 0;
for (; *Str; ++Str) {
if (*Str == '\n' || *Str == SeparatorChar)
atInsnStart = true;
if (atInsnStart && !isspace(*Str)) {
Length += MaxInstLength;
atInsnStart = false;
}
if (atInsnStart && strncmp(Str, CommentString, strlen(CommentString))==0)
atInsnStart = false;
}
return Length;
}
unsigned TargetAsmInfo::PreferredEHDataFormat(DwarfEncoding::Target Reason,
bool Global) const {
return dwarf::DW_EH_PE_absptr;
}
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