Coverage Report

Created: 2019-07-24 05:18

/Users/buildslave/jenkins/workspace/clang-stage2-coverage-R/llvm/lib/MC/MCAsmInfo.cpp
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Source (jump to first uncovered line)
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//===- MCAsmInfo.cpp - Asm Info -------------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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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/BinaryFormat/Dwarf.h"
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#include "llvm/MC/MCContext.h"
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#include "llvm/MC/MCExpr.h"
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#include "llvm/MC/MCStreamer.h"
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#include "llvm/Support/CommandLine.h"
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using namespace llvm;
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enum DefaultOnOff { Default, Enable, Disable };
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static cl::opt<DefaultOnOff> DwarfExtendedLoc(
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    "dwarf-extended-loc", cl::Hidden,
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    cl::desc("Disable emission of the extended flags in .loc directives."),
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    cl::values(clEnumVal(Default, "Default for platform"),
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               clEnumVal(Enable, "Enabled"), clEnumVal(Disable, "Disabled")),
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    cl::init(Default));
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68.0k
MCAsmInfo::MCAsmInfo() {
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  SeparatorString = ";";
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  CommentString = "#";
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  LabelSuffix = ":";
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  PrivateGlobalPrefix = "L";
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  PrivateLabelPrefix = PrivateGlobalPrefix;
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  LinkerPrivateGlobalPrefix = "";
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  InlineAsmStart = "APP";
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  InlineAsmEnd = "NO_APP";
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  Code16Directive = ".code16";
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  Code32Directive = ".code32";
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  Code64Directive = ".code64";
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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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68.0k
  Data8bitsDirective = "\t.byte\t";
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68.0k
  Data16bitsDirective = "\t.short\t";
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68.0k
  Data32bitsDirective = "\t.long\t";
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68.0k
  Data64bitsDirective = "\t.quad\t";
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  GlobalDirective = "\t.globl\t";
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  WeakDirective = "\t.weak\t";
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  if (DwarfExtendedLoc != Default)
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2
    SupportsExtendedDwarfLocDirective = DwarfExtendedLoc == Enable;
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  // FIXME: Clang's logic should be synced with the logic used to initialize
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68.0k
  //        this member and the two implementations should be merged.
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  // For reference:
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68.0k
  // - Solaris always enables the integrated assembler by default
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68.0k
  //   - SparcELFMCAsmInfo and X86ELFMCAsmInfo are handling this case
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68.0k
  // - Windows always enables the integrated assembler by default
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  //   - MCAsmInfoCOFF is handling this case, should it be MCAsmInfoMicrosoft?
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  // - MachO targets always enables the integrated assembler by default
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  //   - MCAsmInfoDarwin is handling this case
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  // - Generic_GCC toolchains enable the integrated assembler on a per
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  //   architecture basis.
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  //   - The target subclasses for AArch64, ARM, and X86 handle these cases
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  UseIntegratedAssembler = false;
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  PreserveAsmComments = true;
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}
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MCAsmInfo::~MCAsmInfo() = default;
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void MCAsmInfo::addInitialFrameState(const MCCFIInstruction &Inst) {
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  InitialFrameState.push_back(Inst);
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}
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bool MCAsmInfo::isSectionAtomizableBySymbols(const MCSection &Section) const {
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  return false;
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0
}
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const MCExpr *
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MCAsmInfo::getExprForPersonalitySymbol(const MCSymbol *Sym,
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                                       unsigned Encoding,
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                                       MCStreamer &Streamer) const {
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  return getExprForFDESymbol(Sym, Encoding, Streamer);
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}
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const MCExpr *
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MCAsmInfo::getExprForFDESymbol(const MCSymbol *Sym,
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                               unsigned Encoding,
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25.8k
                               MCStreamer &Streamer) const {
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  if (!(Encoding & dwarf::DW_EH_PE_pcrel))
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    return MCSymbolRefExpr::create(Sym, Streamer.getContext());
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  MCContext &Context = Streamer.getContext();
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  const MCExpr *Res = MCSymbolRefExpr::create(Sym, Context);
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  MCSymbol *PCSym = Context.createTempSymbol();
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  Streamer.EmitLabel(PCSym);
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  const MCExpr *PC = MCSymbolRefExpr::create(PCSym, Context);
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  return MCBinaryExpr::createSub(Res, PC, Context);
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}
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25.9M
static bool isAcceptableChar(char C) {
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25.9M
  return (C >= 'a' && 
C <= 'z'16.2M
) ||
(9.68M
C >= 'A'9.68M
&&
C <= 'Z'4.65M
) ||
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25.9M
         
(8.41M
C >= '0'8.41M
&&
C <= '9'7.77M
) ||
C == '_'4.02M
||
C == '$'644k
||
C == '.'613k
||
C == '@'7.13k
;
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25.9M
}
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1.82M
bool MCAsmInfo::isValidUnquotedName(StringRef Name) const {
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1.82M
  if (Name.empty())
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0
    return false;
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  // If any of the characters in the string is an unacceptable character, force
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  // quotes.
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for (char C : Name)1.82M
{
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    if (!isAcceptableChar(C))
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      return false;
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  }
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1.82M
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1.82M
  
return true1.81M
;
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1.82M
}
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bool MCAsmInfo::shouldOmitSectionDirective(StringRef SectionName) const {
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  // FIXME: Does .section .bss/.data/.text work everywhere??
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  return SectionName == ".text" || 
SectionName == ".data"112k
||
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(110k
SectionName == ".bss"110k
&&
!usesELFSectionDirectiveForBSS()1.85k
);
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195k
}