forked from OSchip/llvm-project
754 lines
24 KiB
C++
754 lines
24 KiB
C++
//===- AsmLexer.cpp - Lexer for Assembly Files ----------------------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This class implements the lexer for assembly files.
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/MC/MCParser/AsmLexer.h"
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#include "llvm/ADT/APInt.h"
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#include "llvm/ADT/ArrayRef.h"
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#include "llvm/ADT/StringExtras.h"
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#include "llvm/ADT/StringRef.h"
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#include "llvm/ADT/StringSwitch.h"
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#include "llvm/MC/MCAsmInfo.h"
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#include "llvm/MC/MCParser/MCAsmLexer.h"
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#include "llvm/Support/SMLoc.h"
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#include "llvm/Support/SaveAndRestore.h"
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#include <cassert>
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#include <cctype>
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#include <cstdio>
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#include <cstring>
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#include <string>
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#include <tuple>
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#include <utility>
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using namespace llvm;
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AsmLexer::AsmLexer(const MCAsmInfo &MAI) : MAI(MAI) {
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AllowAtInIdentifier = !StringRef(MAI.getCommentString()).startswith("@");
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}
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AsmLexer::~AsmLexer() = default;
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void AsmLexer::setBuffer(StringRef Buf, const char *ptr) {
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CurBuf = Buf;
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if (ptr)
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CurPtr = ptr;
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else
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CurPtr = CurBuf.begin();
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TokStart = nullptr;
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}
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/// ReturnError - Set the error to the specified string at the specified
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/// location. This is defined to always return AsmToken::Error.
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AsmToken AsmLexer::ReturnError(const char *Loc, const std::string &Msg) {
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SetError(SMLoc::getFromPointer(Loc), Msg);
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return AsmToken(AsmToken::Error, StringRef(Loc, CurPtr - Loc));
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}
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int AsmLexer::getNextChar() {
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if (CurPtr == CurBuf.end())
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return EOF;
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return (unsigned char)*CurPtr++;
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}
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/// LexFloatLiteral: [0-9]*[.][0-9]*([eE][+-]?[0-9]*)?
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///
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/// The leading integral digit sequence and dot should have already been
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/// consumed, some or all of the fractional digit sequence *can* have been
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/// consumed.
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AsmToken AsmLexer::LexFloatLiteral() {
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// Skip the fractional digit sequence.
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while (isDigit(*CurPtr))
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++CurPtr;
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// Check for exponent; we intentionally accept a slighlty wider set of
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// literals here and rely on the upstream client to reject invalid ones (e.g.,
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// "1e+").
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if (*CurPtr == 'e' || *CurPtr == 'E') {
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++CurPtr;
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if (*CurPtr == '-' || *CurPtr == '+')
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++CurPtr;
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while (isDigit(*CurPtr))
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++CurPtr;
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}
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return AsmToken(AsmToken::Real,
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StringRef(TokStart, CurPtr - TokStart));
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}
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/// LexHexFloatLiteral matches essentially (.[0-9a-fA-F]*)?[pP][+-]?[0-9a-fA-F]+
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/// while making sure there are enough actual digits around for the constant to
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/// be valid.
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///
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/// The leading "0x[0-9a-fA-F]*" (i.e. integer part) has already been consumed
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/// before we get here.
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AsmToken AsmLexer::LexHexFloatLiteral(bool NoIntDigits) {
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assert((*CurPtr == 'p' || *CurPtr == 'P' || *CurPtr == '.') &&
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"unexpected parse state in floating hex");
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bool NoFracDigits = true;
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// Skip the fractional part if there is one
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if (*CurPtr == '.') {
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++CurPtr;
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const char *FracStart = CurPtr;
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while (isHexDigit(*CurPtr))
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++CurPtr;
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NoFracDigits = CurPtr == FracStart;
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}
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if (NoIntDigits && NoFracDigits)
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return ReturnError(TokStart, "invalid hexadecimal floating-point constant: "
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"expected at least one significand digit");
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// Make sure we do have some kind of proper exponent part
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if (*CurPtr != 'p' && *CurPtr != 'P')
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return ReturnError(TokStart, "invalid hexadecimal floating-point constant: "
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"expected exponent part 'p'");
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++CurPtr;
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if (*CurPtr == '+' || *CurPtr == '-')
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++CurPtr;
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// N.b. exponent digits are *not* hex
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const char *ExpStart = CurPtr;
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while (isDigit(*CurPtr))
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++CurPtr;
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if (CurPtr == ExpStart)
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return ReturnError(TokStart, "invalid hexadecimal floating-point constant: "
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"expected at least one exponent digit");
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return AsmToken(AsmToken::Real, StringRef(TokStart, CurPtr - TokStart));
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}
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/// LexIdentifier: [a-zA-Z_.][a-zA-Z0-9_$.@?]*
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static bool IsIdentifierChar(char c, bool AllowAt) {
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return isAlnum(c) || c == '_' || c == '$' || c == '.' ||
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(c == '@' && AllowAt) || c == '?';
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}
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AsmToken AsmLexer::LexIdentifier() {
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// Check for floating point literals.
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if (CurPtr[-1] == '.' && isDigit(*CurPtr)) {
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// Disambiguate a .1243foo identifier from a floating literal.
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while (isDigit(*CurPtr))
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++CurPtr;
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if (*CurPtr == 'e' || *CurPtr == 'E' ||
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!IsIdentifierChar(*CurPtr, AllowAtInIdentifier))
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return LexFloatLiteral();
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}
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while (IsIdentifierChar(*CurPtr, AllowAtInIdentifier))
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++CurPtr;
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// Handle . as a special case.
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if (CurPtr == TokStart+1 && TokStart[0] == '.')
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return AsmToken(AsmToken::Dot, StringRef(TokStart, 1));
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return AsmToken(AsmToken::Identifier, StringRef(TokStart, CurPtr - TokStart));
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}
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/// LexSlash: Slash: /
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/// C-Style Comment: /* ... */
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AsmToken AsmLexer::LexSlash() {
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switch (*CurPtr) {
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case '*':
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IsAtStartOfStatement = false;
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break; // C style comment.
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case '/':
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++CurPtr;
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return LexLineComment();
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default:
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IsAtStartOfStatement = false;
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return AsmToken(AsmToken::Slash, StringRef(TokStart, 1));
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}
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// C Style comment.
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++CurPtr; // skip the star.
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const char *CommentTextStart = CurPtr;
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while (CurPtr != CurBuf.end()) {
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switch (*CurPtr++) {
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case '*':
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// End of the comment?
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if (*CurPtr != '/')
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break;
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// If we have a CommentConsumer, notify it about the comment.
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if (CommentConsumer) {
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CommentConsumer->HandleComment(
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SMLoc::getFromPointer(CommentTextStart),
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StringRef(CommentTextStart, CurPtr - 1 - CommentTextStart));
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}
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++CurPtr; // End the */.
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return AsmToken(AsmToken::Comment,
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StringRef(TokStart, CurPtr - TokStart));
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}
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}
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return ReturnError(TokStart, "unterminated comment");
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}
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/// LexLineComment: Comment: #[^\n]*
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/// : //[^\n]*
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AsmToken AsmLexer::LexLineComment() {
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// Mark This as an end of statement with a body of the
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// comment. While it would be nicer to leave this two tokens,
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// backwards compatability with TargetParsers makes keeping this in this form
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// better.
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const char *CommentTextStart = CurPtr;
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int CurChar = getNextChar();
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while (CurChar != '\n' && CurChar != '\r' && CurChar != EOF)
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CurChar = getNextChar();
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if (CurChar == '\r' && CurPtr != CurBuf.end() && *CurPtr == '\n')
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++CurPtr;
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// If we have a CommentConsumer, notify it about the comment.
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if (CommentConsumer) {
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CommentConsumer->HandleComment(
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SMLoc::getFromPointer(CommentTextStart),
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StringRef(CommentTextStart, CurPtr - 1 - CommentTextStart));
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}
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IsAtStartOfLine = true;
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// This is a whole line comment. leave newline
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if (IsAtStartOfStatement)
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return AsmToken(AsmToken::EndOfStatement,
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StringRef(TokStart, CurPtr - TokStart));
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IsAtStartOfStatement = true;
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return AsmToken(AsmToken::EndOfStatement,
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StringRef(TokStart, CurPtr - 1 - TokStart));
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}
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static void SkipIgnoredIntegerSuffix(const char *&CurPtr) {
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// Skip ULL, UL, U, L and LL suffices.
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if (CurPtr[0] == 'U')
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++CurPtr;
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if (CurPtr[0] == 'L')
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++CurPtr;
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if (CurPtr[0] == 'L')
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++CurPtr;
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}
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// Look ahead to search for first non-hex digit, if it's [hH], then we treat the
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// integer as a hexadecimal, possibly with leading zeroes.
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static unsigned doHexLookAhead(const char *&CurPtr, unsigned DefaultRadix,
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bool LexHex) {
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const char *FirstNonDec = nullptr;
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const char *LookAhead = CurPtr;
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while (true) {
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if (isDigit(*LookAhead)) {
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++LookAhead;
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} else {
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if (!FirstNonDec)
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FirstNonDec = LookAhead;
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// Keep going if we are looking for a 'h' suffix.
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if (LexHex && isHexDigit(*LookAhead))
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++LookAhead;
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else
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break;
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}
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}
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bool isHex = LexHex && (*LookAhead == 'h' || *LookAhead == 'H');
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CurPtr = isHex || !FirstNonDec ? LookAhead : FirstNonDec;
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if (isHex)
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return 16;
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return DefaultRadix;
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}
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static AsmToken intToken(StringRef Ref, APInt &Value)
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{
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if (Value.isIntN(64))
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return AsmToken(AsmToken::Integer, Ref, Value);
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return AsmToken(AsmToken::BigNum, Ref, Value);
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}
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/// LexDigit: First character is [0-9].
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/// Local Label: [0-9][:]
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/// Forward/Backward Label: [0-9][fb]
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/// Binary integer: 0b[01]+
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/// Octal integer: 0[0-7]+
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/// Hex integer: 0x[0-9a-fA-F]+ or [0x]?[0-9][0-9a-fA-F]*[hH]
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/// Decimal integer: [1-9][0-9]*
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AsmToken AsmLexer::LexDigit() {
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// MASM-flavor binary integer: [01]+[bB]
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// MASM-flavor hexadecimal integer: [0-9][0-9a-fA-F]*[hH]
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if (LexMasmIntegers && isdigit(CurPtr[-1])) {
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const char *FirstNonBinary = (CurPtr[-1] != '0' && CurPtr[-1] != '1') ?
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CurPtr - 1 : nullptr;
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const char *OldCurPtr = CurPtr;
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while (isHexDigit(*CurPtr)) {
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if (*CurPtr != '0' && *CurPtr != '1' && !FirstNonBinary)
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FirstNonBinary = CurPtr;
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++CurPtr;
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}
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unsigned Radix = 0;
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if (*CurPtr == 'h' || *CurPtr == 'H') {
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// hexadecimal number
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++CurPtr;
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Radix = 16;
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} else if (FirstNonBinary && FirstNonBinary + 1 == CurPtr &&
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(*FirstNonBinary == 'b' || *FirstNonBinary == 'B'))
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Radix = 2;
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if (Radix == 2 || Radix == 16) {
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StringRef Result(TokStart, CurPtr - TokStart);
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APInt Value(128, 0, true);
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if (Result.drop_back().getAsInteger(Radix, Value))
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return ReturnError(TokStart, Radix == 2 ? "invalid binary number" :
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"invalid hexdecimal number");
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// MSVC accepts and ignores type suffices on integer literals.
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SkipIgnoredIntegerSuffix(CurPtr);
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return intToken(Result, Value);
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}
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// octal/decimal integers, or floating point numbers, fall through
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CurPtr = OldCurPtr;
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}
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// Decimal integer: [1-9][0-9]*
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if (CurPtr[-1] != '0' || CurPtr[0] == '.') {
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unsigned Radix = doHexLookAhead(CurPtr, 10, LexMasmIntegers);
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bool isHex = Radix == 16;
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// Check for floating point literals.
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if (!isHex && (*CurPtr == '.' || *CurPtr == 'e')) {
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++CurPtr;
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return LexFloatLiteral();
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}
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StringRef Result(TokStart, CurPtr - TokStart);
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APInt Value(128, 0, true);
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if (Result.getAsInteger(Radix, Value))
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return ReturnError(TokStart, !isHex ? "invalid decimal number" :
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"invalid hexdecimal number");
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// Consume the [hH].
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if (LexMasmIntegers && Radix == 16)
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++CurPtr;
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// The darwin/x86 (and x86-64) assembler accepts and ignores type
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// suffices on integer literals.
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SkipIgnoredIntegerSuffix(CurPtr);
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return intToken(Result, Value);
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}
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if (!LexMasmIntegers && ((*CurPtr == 'b') || (*CurPtr == 'B'))) {
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++CurPtr;
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// See if we actually have "0b" as part of something like "jmp 0b\n"
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if (!isDigit(CurPtr[0])) {
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--CurPtr;
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StringRef Result(TokStart, CurPtr - TokStart);
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return AsmToken(AsmToken::Integer, Result, 0);
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}
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const char *NumStart = CurPtr;
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while (CurPtr[0] == '0' || CurPtr[0] == '1')
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++CurPtr;
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// Requires at least one binary digit.
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if (CurPtr == NumStart)
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return ReturnError(TokStart, "invalid binary number");
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StringRef Result(TokStart, CurPtr - TokStart);
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APInt Value(128, 0, true);
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if (Result.substr(2).getAsInteger(2, Value))
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return ReturnError(TokStart, "invalid binary number");
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// The darwin/x86 (and x86-64) assembler accepts and ignores ULL and LL
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// suffixes on integer literals.
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SkipIgnoredIntegerSuffix(CurPtr);
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return intToken(Result, Value);
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}
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if ((*CurPtr == 'x') || (*CurPtr == 'X')) {
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++CurPtr;
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const char *NumStart = CurPtr;
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while (isHexDigit(CurPtr[0]))
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++CurPtr;
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// "0x.0p0" is valid, and "0x0p0" (but not "0xp0" for example, which will be
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// diagnosed by LexHexFloatLiteral).
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if (CurPtr[0] == '.' || CurPtr[0] == 'p' || CurPtr[0] == 'P')
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return LexHexFloatLiteral(NumStart == CurPtr);
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// Otherwise requires at least one hex digit.
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if (CurPtr == NumStart)
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return ReturnError(CurPtr-2, "invalid hexadecimal number");
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APInt Result(128, 0);
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if (StringRef(TokStart, CurPtr - TokStart).getAsInteger(0, Result))
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return ReturnError(TokStart, "invalid hexadecimal number");
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// Consume the optional [hH].
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if (LexMasmIntegers && (*CurPtr == 'h' || *CurPtr == 'H'))
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++CurPtr;
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// The darwin/x86 (and x86-64) assembler accepts and ignores ULL and LL
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// suffixes on integer literals.
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SkipIgnoredIntegerSuffix(CurPtr);
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return intToken(StringRef(TokStart, CurPtr - TokStart), Result);
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}
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// Either octal or hexadecimal.
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APInt Value(128, 0, true);
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unsigned Radix = doHexLookAhead(CurPtr, 8, LexMasmIntegers);
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bool isHex = Radix == 16;
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StringRef Result(TokStart, CurPtr - TokStart);
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if (Result.getAsInteger(Radix, Value))
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return ReturnError(TokStart, !isHex ? "invalid octal number" :
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"invalid hexdecimal number");
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// Consume the [hH].
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if (Radix == 16)
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++CurPtr;
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// The darwin/x86 (and x86-64) assembler accepts and ignores ULL and LL
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// suffixes on integer literals.
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SkipIgnoredIntegerSuffix(CurPtr);
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return intToken(Result, Value);
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}
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/// LexSingleQuote: Integer: 'b'
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AsmToken AsmLexer::LexSingleQuote() {
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int CurChar = getNextChar();
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if (CurChar == '\\')
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CurChar = getNextChar();
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if (CurChar == EOF)
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return ReturnError(TokStart, "unterminated single quote");
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CurChar = getNextChar();
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if (CurChar != '\'')
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return ReturnError(TokStart, "single quote way too long");
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// The idea here being that 'c' is basically just an integral
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// constant.
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StringRef Res = StringRef(TokStart,CurPtr - TokStart);
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long long Value;
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if (Res.startswith("\'\\")) {
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char theChar = Res[2];
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switch (theChar) {
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default: Value = theChar; break;
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case '\'': Value = '\''; break;
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case 't': Value = '\t'; break;
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case 'n': Value = '\n'; break;
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case 'b': Value = '\b'; break;
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}
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} else
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Value = TokStart[1];
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return AsmToken(AsmToken::Integer, Res, Value);
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}
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/// LexQuote: String: "..."
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AsmToken AsmLexer::LexQuote() {
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int CurChar = getNextChar();
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// TODO: does gas allow multiline string constants?
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while (CurChar != '"') {
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if (CurChar == '\\') {
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// Allow \", etc.
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CurChar = getNextChar();
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}
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if (CurChar == EOF)
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return ReturnError(TokStart, "unterminated string constant");
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CurChar = getNextChar();
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}
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return AsmToken(AsmToken::String, StringRef(TokStart, CurPtr - TokStart));
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}
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StringRef AsmLexer::LexUntilEndOfStatement() {
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TokStart = CurPtr;
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while (!isAtStartOfComment(CurPtr) && // Start of line comment.
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!isAtStatementSeparator(CurPtr) && // End of statement marker.
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*CurPtr != '\n' && *CurPtr != '\r' && CurPtr != CurBuf.end()) {
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++CurPtr;
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}
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return StringRef(TokStart, CurPtr-TokStart);
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}
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StringRef AsmLexer::LexUntilEndOfLine() {
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TokStart = CurPtr;
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while (*CurPtr != '\n' && *CurPtr != '\r' && CurPtr != CurBuf.end()) {
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++CurPtr;
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}
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return StringRef(TokStart, CurPtr-TokStart);
|
|
}
|
|
|
|
size_t AsmLexer::peekTokens(MutableArrayRef<AsmToken> Buf,
|
|
bool ShouldSkipSpace) {
|
|
SaveAndRestore<const char *> SavedTokenStart(TokStart);
|
|
SaveAndRestore<const char *> SavedCurPtr(CurPtr);
|
|
SaveAndRestore<bool> SavedAtStartOfLine(IsAtStartOfLine);
|
|
SaveAndRestore<bool> SavedAtStartOfStatement(IsAtStartOfStatement);
|
|
SaveAndRestore<bool> SavedSkipSpace(SkipSpace, ShouldSkipSpace);
|
|
SaveAndRestore<bool> SavedIsPeeking(IsPeeking, true);
|
|
std::string SavedErr = getErr();
|
|
SMLoc SavedErrLoc = getErrLoc();
|
|
|
|
size_t ReadCount;
|
|
for (ReadCount = 0; ReadCount < Buf.size(); ++ReadCount) {
|
|
AsmToken Token = LexToken();
|
|
|
|
Buf[ReadCount] = Token;
|
|
|
|
if (Token.is(AsmToken::Eof))
|
|
break;
|
|
}
|
|
|
|
SetError(SavedErrLoc, SavedErr);
|
|
return ReadCount;
|
|
}
|
|
|
|
bool AsmLexer::isAtStartOfComment(const char *Ptr) {
|
|
StringRef CommentString = MAI.getCommentString();
|
|
|
|
if (CommentString.size() == 1)
|
|
return CommentString[0] == Ptr[0];
|
|
|
|
// Allow # preprocessor commments also be counted as comments for "##" cases
|
|
if (CommentString[1] == '#')
|
|
return CommentString[0] == Ptr[0];
|
|
|
|
return strncmp(Ptr, CommentString.data(), CommentString.size()) == 0;
|
|
}
|
|
|
|
bool AsmLexer::isAtStatementSeparator(const char *Ptr) {
|
|
return strncmp(Ptr, MAI.getSeparatorString(),
|
|
strlen(MAI.getSeparatorString())) == 0;
|
|
}
|
|
|
|
AsmToken AsmLexer::LexToken() {
|
|
TokStart = CurPtr;
|
|
// This always consumes at least one character.
|
|
int CurChar = getNextChar();
|
|
|
|
if (!IsPeeking && CurChar == '#' && IsAtStartOfStatement) {
|
|
// If this starts with a '#', this may be a cpp
|
|
// hash directive and otherwise a line comment.
|
|
AsmToken TokenBuf[2];
|
|
MutableArrayRef<AsmToken> Buf(TokenBuf, 2);
|
|
size_t num = peekTokens(Buf, true);
|
|
// There cannot be a space preceeding this
|
|
if (IsAtStartOfLine && num == 2 && TokenBuf[0].is(AsmToken::Integer) &&
|
|
TokenBuf[1].is(AsmToken::String)) {
|
|
CurPtr = TokStart; // reset curPtr;
|
|
StringRef s = LexUntilEndOfLine();
|
|
UnLex(TokenBuf[1]);
|
|
UnLex(TokenBuf[0]);
|
|
return AsmToken(AsmToken::HashDirective, s);
|
|
}
|
|
return LexLineComment();
|
|
}
|
|
|
|
if (isAtStartOfComment(TokStart))
|
|
return LexLineComment();
|
|
|
|
if (isAtStatementSeparator(TokStart)) {
|
|
CurPtr += strlen(MAI.getSeparatorString()) - 1;
|
|
IsAtStartOfLine = true;
|
|
IsAtStartOfStatement = true;
|
|
return AsmToken(AsmToken::EndOfStatement,
|
|
StringRef(TokStart, strlen(MAI.getSeparatorString())));
|
|
}
|
|
|
|
// If we're missing a newline at EOF, make sure we still get an
|
|
// EndOfStatement token before the Eof token.
|
|
if (CurChar == EOF && !IsAtStartOfStatement) {
|
|
IsAtStartOfLine = true;
|
|
IsAtStartOfStatement = true;
|
|
return AsmToken(AsmToken::EndOfStatement, StringRef(TokStart, 1));
|
|
}
|
|
IsAtStartOfLine = false;
|
|
bool OldIsAtStartOfStatement = IsAtStartOfStatement;
|
|
IsAtStartOfStatement = false;
|
|
switch (CurChar) {
|
|
default:
|
|
// Handle identifier: [a-zA-Z_.][a-zA-Z0-9_$.@]*
|
|
if (isalpha(CurChar) || CurChar == '_' || CurChar == '.')
|
|
return LexIdentifier();
|
|
|
|
// Unknown character, emit an error.
|
|
return ReturnError(TokStart, "invalid character in input");
|
|
case EOF:
|
|
IsAtStartOfLine = true;
|
|
IsAtStartOfStatement = true;
|
|
return AsmToken(AsmToken::Eof, StringRef(TokStart, 0));
|
|
case 0:
|
|
case ' ':
|
|
case '\t':
|
|
IsAtStartOfStatement = OldIsAtStartOfStatement;
|
|
while (*CurPtr == ' ' || *CurPtr == '\t')
|
|
CurPtr++;
|
|
if (SkipSpace)
|
|
return LexToken(); // Ignore whitespace.
|
|
else
|
|
return AsmToken(AsmToken::Space, StringRef(TokStart, CurPtr - TokStart));
|
|
case '\r': {
|
|
IsAtStartOfLine = true;
|
|
IsAtStartOfStatement = true;
|
|
// If this is a CR followed by LF, treat that as one token.
|
|
if (CurPtr != CurBuf.end() && *CurPtr == '\n')
|
|
++CurPtr;
|
|
return AsmToken(AsmToken::EndOfStatement,
|
|
StringRef(TokStart, CurPtr - TokStart));
|
|
}
|
|
case '\n':
|
|
IsAtStartOfLine = true;
|
|
IsAtStartOfStatement = true;
|
|
return AsmToken(AsmToken::EndOfStatement, StringRef(TokStart, 1));
|
|
case ':': return AsmToken(AsmToken::Colon, StringRef(TokStart, 1));
|
|
case '+': return AsmToken(AsmToken::Plus, StringRef(TokStart, 1));
|
|
case '~': return AsmToken(AsmToken::Tilde, StringRef(TokStart, 1));
|
|
case '(': return AsmToken(AsmToken::LParen, StringRef(TokStart, 1));
|
|
case ')': return AsmToken(AsmToken::RParen, StringRef(TokStart, 1));
|
|
case '[': return AsmToken(AsmToken::LBrac, StringRef(TokStart, 1));
|
|
case ']': return AsmToken(AsmToken::RBrac, StringRef(TokStart, 1));
|
|
case '{': return AsmToken(AsmToken::LCurly, StringRef(TokStart, 1));
|
|
case '}': return AsmToken(AsmToken::RCurly, StringRef(TokStart, 1));
|
|
case '*': return AsmToken(AsmToken::Star, StringRef(TokStart, 1));
|
|
case ',': return AsmToken(AsmToken::Comma, StringRef(TokStart, 1));
|
|
case '$': return AsmToken(AsmToken::Dollar, StringRef(TokStart, 1));
|
|
case '@': return AsmToken(AsmToken::At, StringRef(TokStart, 1));
|
|
case '\\': return AsmToken(AsmToken::BackSlash, StringRef(TokStart, 1));
|
|
case '=':
|
|
if (*CurPtr == '=') {
|
|
++CurPtr;
|
|
return AsmToken(AsmToken::EqualEqual, StringRef(TokStart, 2));
|
|
}
|
|
return AsmToken(AsmToken::Equal, StringRef(TokStart, 1));
|
|
case '-':
|
|
if (*CurPtr == '>') {
|
|
++CurPtr;
|
|
return AsmToken(AsmToken::MinusGreater, StringRef(TokStart, 2));
|
|
}
|
|
return AsmToken(AsmToken::Minus, StringRef(TokStart, 1));
|
|
case '|':
|
|
if (*CurPtr == '|') {
|
|
++CurPtr;
|
|
return AsmToken(AsmToken::PipePipe, StringRef(TokStart, 2));
|
|
}
|
|
return AsmToken(AsmToken::Pipe, StringRef(TokStart, 1));
|
|
case '^': return AsmToken(AsmToken::Caret, StringRef(TokStart, 1));
|
|
case '&':
|
|
if (*CurPtr == '&') {
|
|
++CurPtr;
|
|
return AsmToken(AsmToken::AmpAmp, StringRef(TokStart, 2));
|
|
}
|
|
return AsmToken(AsmToken::Amp, StringRef(TokStart, 1));
|
|
case '!':
|
|
if (*CurPtr == '=') {
|
|
++CurPtr;
|
|
return AsmToken(AsmToken::ExclaimEqual, StringRef(TokStart, 2));
|
|
}
|
|
return AsmToken(AsmToken::Exclaim, StringRef(TokStart, 1));
|
|
case '%':
|
|
if (MAI.hasMipsExpressions()) {
|
|
AsmToken::TokenKind Operator;
|
|
unsigned OperatorLength;
|
|
|
|
std::tie(Operator, OperatorLength) =
|
|
StringSwitch<std::pair<AsmToken::TokenKind, unsigned>>(
|
|
StringRef(CurPtr))
|
|
.StartsWith("call16", {AsmToken::PercentCall16, 7})
|
|
.StartsWith("call_hi", {AsmToken::PercentCall_Hi, 8})
|
|
.StartsWith("call_lo", {AsmToken::PercentCall_Lo, 8})
|
|
.StartsWith("dtprel_hi", {AsmToken::PercentDtprel_Hi, 10})
|
|
.StartsWith("dtprel_lo", {AsmToken::PercentDtprel_Lo, 10})
|
|
.StartsWith("got_disp", {AsmToken::PercentGot_Disp, 9})
|
|
.StartsWith("got_hi", {AsmToken::PercentGot_Hi, 7})
|
|
.StartsWith("got_lo", {AsmToken::PercentGot_Lo, 7})
|
|
.StartsWith("got_ofst", {AsmToken::PercentGot_Ofst, 9})
|
|
.StartsWith("got_page", {AsmToken::PercentGot_Page, 9})
|
|
.StartsWith("gottprel", {AsmToken::PercentGottprel, 9})
|
|
.StartsWith("got", {AsmToken::PercentGot, 4})
|
|
.StartsWith("gp_rel", {AsmToken::PercentGp_Rel, 7})
|
|
.StartsWith("higher", {AsmToken::PercentHigher, 7})
|
|
.StartsWith("highest", {AsmToken::PercentHighest, 8})
|
|
.StartsWith("hi", {AsmToken::PercentHi, 3})
|
|
.StartsWith("lo", {AsmToken::PercentLo, 3})
|
|
.StartsWith("neg", {AsmToken::PercentNeg, 4})
|
|
.StartsWith("pcrel_hi", {AsmToken::PercentPcrel_Hi, 9})
|
|
.StartsWith("pcrel_lo", {AsmToken::PercentPcrel_Lo, 9})
|
|
.StartsWith("tlsgd", {AsmToken::PercentTlsgd, 6})
|
|
.StartsWith("tlsldm", {AsmToken::PercentTlsldm, 7})
|
|
.StartsWith("tprel_hi", {AsmToken::PercentTprel_Hi, 9})
|
|
.StartsWith("tprel_lo", {AsmToken::PercentTprel_Lo, 9})
|
|
.Default({AsmToken::Percent, 1});
|
|
|
|
if (Operator != AsmToken::Percent) {
|
|
CurPtr += OperatorLength - 1;
|
|
return AsmToken(Operator, StringRef(TokStart, OperatorLength));
|
|
}
|
|
}
|
|
return AsmToken(AsmToken::Percent, StringRef(TokStart, 1));
|
|
case '/':
|
|
IsAtStartOfStatement = OldIsAtStartOfStatement;
|
|
return LexSlash();
|
|
case '#': return AsmToken(AsmToken::Hash, StringRef(TokStart, 1));
|
|
case '\'': return LexSingleQuote();
|
|
case '"': return LexQuote();
|
|
case '0': case '1': case '2': case '3': case '4':
|
|
case '5': case '6': case '7': case '8': case '9':
|
|
return LexDigit();
|
|
case '<':
|
|
switch (*CurPtr) {
|
|
case '<':
|
|
++CurPtr;
|
|
return AsmToken(AsmToken::LessLess, StringRef(TokStart, 2));
|
|
case '=':
|
|
++CurPtr;
|
|
return AsmToken(AsmToken::LessEqual, StringRef(TokStart, 2));
|
|
case '>':
|
|
++CurPtr;
|
|
return AsmToken(AsmToken::LessGreater, StringRef(TokStart, 2));
|
|
default:
|
|
return AsmToken(AsmToken::Less, StringRef(TokStart, 1));
|
|
}
|
|
case '>':
|
|
switch (*CurPtr) {
|
|
case '>':
|
|
++CurPtr;
|
|
return AsmToken(AsmToken::GreaterGreater, StringRef(TokStart, 2));
|
|
case '=':
|
|
++CurPtr;
|
|
return AsmToken(AsmToken::GreaterEqual, StringRef(TokStart, 2));
|
|
default:
|
|
return AsmToken(AsmToken::Greater, StringRef(TokStart, 1));
|
|
}
|
|
|
|
// TODO: Quoted identifiers (objc methods etc)
|
|
// local labels: [0-9][:]
|
|
// Forward/backward labels: [0-9][fb]
|
|
// Integers, fp constants, character constants.
|
|
}
|
|
}
|