mirror of
https://github.com/RPCS3/llvm-mirror.git
synced 2024-11-24 19:52:54 +01:00
a128f751c8
Summary: Some targets do not support extended format of .loc directive and support only simple format: .loc <FileID> <Line> <Column>. Patch adds MCAsmInfo flag and option that allows emit .loc directive without additional flags. Reviewers: echristo Subscribers: llvm-commits Differential Revision: https://reviews.llvm.org/D45184 llvm-svn: 329089
124 lines
4.3 KiB
C++
124 lines
4.3 KiB
C++
//===- 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/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());
|
|
}
|