//===----------------------------------------------------------------------===//
#include "MIParser.h"
+#include "MILexer.h"
#include "llvm/ADT/StringMap.h"
#include "llvm/CodeGen/MachineBasicBlock.h"
#include "llvm/CodeGen/MachineFunction.h"
SourceMgr &SM;
MachineFunction &MF;
SMDiagnostic &Error;
- StringRef Source;
+ StringRef Source, CurrentSource;
+ MIToken Token;
/// Maps from instruction names to op codes.
StringMap<unsigned> Names2InstrOpCodes;
MIParser(SourceMgr &SM, MachineFunction &MF, SMDiagnostic &Error,
StringRef Source);
+ void lex();
+
/// Report an error at the current location with the given message.
///
/// This function always return true.
bool error(const Twine &Msg);
+ /// Report an error at the given location with the given message.
+ ///
+ /// This function always return true.
+ bool error(StringRef::iterator Loc, const Twine &Msg);
+
MachineInstr *parse();
private:
/// Try to convert an instruction name to an opcode. Return true if the
/// instruction name is invalid.
bool parseInstrName(StringRef InstrName, unsigned &OpCode);
+
+ bool parseInstruction(unsigned &OpCode);
};
} // end anonymous namespace
MIParser::MIParser(SourceMgr &SM, MachineFunction &MF, SMDiagnostic &Error,
StringRef Source)
- : SM(SM), MF(MF), Error(Error), Source(Source) {}
+ : SM(SM), MF(MF), Error(Error), Source(Source), CurrentSource(Source),
+ Token(MIToken::Error, StringRef()) {}
+
+void MIParser::lex() {
+ CurrentSource = lexMIToken(
+ CurrentSource, Token,
+ [this](StringRef::iterator Loc, const Twine &Msg) { error(Loc, Msg); });
+}
+
+bool MIParser::error(const Twine &Msg) { return error(Token.location(), Msg); }
-bool MIParser::error(const Twine &Msg) {
+bool MIParser::error(StringRef::iterator Loc, const Twine &Msg) {
// TODO: Get the proper location in the MIR file, not just a location inside
// the string.
- Error =
- SMDiagnostic(SM, SMLoc(), SM.getMemoryBuffer(SM.getMainFileID())
- ->getBufferIdentifier(),
- 1, 0, SourceMgr::DK_Error, Msg.str(), Source, None, None);
+ assert(Loc >= Source.data() && Loc <= (Source.data() + Source.size()));
+ Error = SMDiagnostic(
+ SM, SMLoc(),
+ SM.getMemoryBuffer(SM.getMainFileID())->getBufferIdentifier(), 1,
+ Loc - Source.data(), SourceMgr::DK_Error, Msg.str(), Source, None, None);
return true;
}
MachineInstr *MIParser::parse() {
- StringRef InstrName = Source;
+ lex();
+
unsigned OpCode;
- if (parseInstrName(InstrName, OpCode)) {
- error(Twine("unknown machine instruction name '") + InstrName + "'");
+ if (Token.isError() || parseInstruction(OpCode))
return nullptr;
- }
// TODO: Parse the rest of instruction - machine operands, etc.
const auto &MCID = MF.getSubtarget().getInstrInfo()->get(OpCode);
return MI;
}
+bool MIParser::parseInstruction(unsigned &OpCode) {
+ if (Token.isNot(MIToken::Identifier))
+ return error("expected a machine instruction");
+ StringRef InstrName = Token.stringValue();
+ if (parseInstrName(InstrName, OpCode))
+ return error(Twine("unknown machine instruction name '") + InstrName + "'");
+ return false;
+}
+
void MIParser::initNames2InstrOpCodes() {
if (!Names2InstrOpCodes.empty())
return;