Expected<const CodeRegions &> AsmCodeRegionGenerator::parseCodeRegions() {
MCTargetOptions Opts;
Opts.PreserveAsmComments = false;
MCStreamerWrapper Str(Ctx, Regions);
// Create a MCAsmParser and setup the lexer to recognize llvm-mca ASM
// comments.
std::unique_ptr<MCAsmParser> Parser(
createMCAsmParser(Regions.getSourceMgr(), Ctx, Str, MAI));
MCAsmLexer &Lexer = Parser->getLexer();
MCACommentConsumer CC(Regions);
Lexer.setCommentConsumer(&CC);
// Create a target-specific parser and perform the parse.
std::unique_ptr<MCTargetAsmParser> TAP(
TheTarget.createMCAsmParser(STI, *Parser, MCII, Opts));
if (!TAP)
return make_error<StringError>(
"This target does not support assembly parsing.",
inconvertibleErrorCode());
Parser->setTargetParser(*TAP);
Parser->Run(false);
// Get the assembler dialect from the input. llvm-mca will use this as the
// default dialect when printing reports.
AssemblerDialect = Parser->getAssemblerDialect();
return Regions;
}
int AssembleInput(
const Target *TheTarget,
SourceMgr &SrcMgr,
MCContext &Ctx,
MCStreamer &Str,
MCAsmInfo &MAI,
MCSubtargetInfo &STI,
MCInstrInfo &MCII,
MCTargetOptions &MCOptions
) {
std::unique_ptr<MCAsmParser> Parser(createMCAsmParser(SrcMgr, Ctx, Str, MAI));
std::unique_ptr<MCTargetAsmParser> TAP(TheTarget->createMCAsmParser(STI, *Parser, MCII, MCOptions));
if (!TAP) {
errs() << ": error: this target does not support assembly parsing.\n";
return 1;
}
Parser->setTargetParser(*TAP);
// AsmParser::Run in lib/MC/MCParser/AsmParser.cpp
/* first param is NoInitialTextSection
by supplying false -> YES initial text section (we don't have to do .text) */
int Res = Parser->Run(false);
return Res;
}
