mirror of
https://github.com/RPCS3/llvm-mirror.git
synced 2024-10-19 11:02:59 +02:00
ae65e281f3
to reflect the new license. We understand that people may be surprised that we're moving the header entirely to discuss the new license. We checked this carefully with the Foundation's lawyer and we believe this is the correct approach. Essentially, all code in the project is now made available by the LLVM project under our new license, so you will see that the license headers include that license only. Some of our contributors have contributed code under our old license, and accordingly, we have retained a copy of our old license notice in the top-level files in each project and repository. llvm-svn: 351636
123 lines
4.3 KiB
C++
123 lines
4.3 KiB
C++
//===- MCAsmInfo.cpp - Asm Info -------------------------------------------===//
|
|
//
|
|
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
|
|
// See https://llvm.org/LICENSE.txt for license information.
|
|
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// This file defines target asm properties related what form asm statements
|
|
// should take.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#include "llvm/MC/MCAsmInfo.h"
|
|
#include "llvm/BinaryFormat/Dwarf.h"
|
|
#include "llvm/MC/MCContext.h"
|
|
#include "llvm/MC/MCExpr.h"
|
|
#include "llvm/MC/MCStreamer.h"
|
|
#include "llvm/Support/CommandLine.h"
|
|
|
|
using namespace llvm;
|
|
|
|
enum DefaultOnOff { Default, Enable, Disable };
|
|
static cl::opt<DefaultOnOff> DwarfExtendedLoc(
|
|
"dwarf-extended-loc", cl::Hidden,
|
|
cl::desc("Disable emission of the extended flags in .loc directives."),
|
|
cl::values(clEnumVal(Default, "Default for platform"),
|
|
clEnumVal(Enable, "Enabled"), clEnumVal(Disable, "Disabled")),
|
|
cl::init(Default));
|
|
|
|
MCAsmInfo::MCAsmInfo() {
|
|
SeparatorString = ";";
|
|
CommentString = "#";
|
|
LabelSuffix = ":";
|
|
PrivateGlobalPrefix = "L";
|
|
PrivateLabelPrefix = PrivateGlobalPrefix;
|
|
LinkerPrivateGlobalPrefix = "";
|
|
InlineAsmStart = "APP";
|
|
InlineAsmEnd = "NO_APP";
|
|
Code16Directive = ".code16";
|
|
Code32Directive = ".code32";
|
|
Code64Directive = ".code64";
|
|
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";
|
|
GlobalDirective = "\t.globl\t";
|
|
WeakDirective = "\t.weak\t";
|
|
if (DwarfExtendedLoc != Default)
|
|
SupportsExtendedDwarfLocDirective = DwarfExtendedLoc == Enable;
|
|
|
|
// FIXME: Clang's logic should be synced with the logic used to initialize
|
|
// this member and the two implementations should be merged.
|
|
// For reference:
|
|
// - Solaris always enables the integrated assembler by default
|
|
// - SparcELFMCAsmInfo and X86ELFMCAsmInfo are handling this case
|
|
// - Windows always enables the integrated assembler by default
|
|
// - MCAsmInfoCOFF is handling this case, should it be MCAsmInfoMicrosoft?
|
|
// - MachO targets always enables the integrated assembler by default
|
|
// - MCAsmInfoDarwin is handling this case
|
|
// - Generic_GCC toolchains enable the integrated assembler on a per
|
|
// architecture basis.
|
|
// - The target subclasses for AArch64, ARM, and X86 handle these cases
|
|
UseIntegratedAssembler = false;
|
|
PreserveAsmComments = true;
|
|
}
|
|
|
|
MCAsmInfo::~MCAsmInfo() = default;
|
|
|
|
bool MCAsmInfo::isSectionAtomizableBySymbols(const MCSection &Section) const {
|
|
return false;
|
|
}
|
|
|
|
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);
|
|
}
|
|
|
|
static bool isAcceptableChar(char C) {
|
|
return (C >= 'a' && C <= 'z') || (C >= 'A' && C <= 'Z') ||
|
|
(C >= '0' && C <= '9') || C == '_' || C == '$' || C == '.' || C == '@';
|
|
}
|
|
|
|
bool MCAsmInfo::isValidUnquotedName(StringRef Name) const {
|
|
if (Name.empty())
|
|
return false;
|
|
|
|
// If any of the characters in the string is an unacceptable character, force
|
|
// quotes.
|
|
for (char C : Name) {
|
|
if (!isAcceptableChar(C))
|
|
return false;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
bool MCAsmInfo::shouldOmitSectionDirective(StringRef SectionName) const {
|
|
// FIXME: Does .section .bss/.data/.text work everywhere??
|
|
return SectionName == ".text" || SectionName == ".data" ||
|
|
(SectionName == ".bss" && !usesELFSectionDirectiveForBSS());
|
|
}
|