mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2025-06-12 13:38:21 +00:00
Replace the original flex lexer with a hand writen one. This
drops a dependency on flex and lets us make future progress more easily. Yay for 2 fewer .cvs files to make silly conflicts with. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@44213 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner
826
lib/AsmParser/LLLexer.cpp
Normal file
826
lib/AsmParser/LLLexer.cpp
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@ -0,0 +1,826 @@
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//===- LLLexer.cpp - Lexer for .ll Files ----------------------------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file was developed by Chris Lattner and is distributed under
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// the University of Illinois Open Source License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// Implement the Lexer for .ll files.
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//
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//===----------------------------------------------------------------------===//
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#include "LLLexer.h"
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#include "ParserInternals.h"
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#include "llvm/Support/MemoryBuffer.h"
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#include <list>
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#include "llvmAsmParser.h"
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using namespace llvm;
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//===----------------------------------------------------------------------===//
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// Helper functions.
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//===----------------------------------------------------------------------===//
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// atoull - Convert an ascii string of decimal digits into the unsigned long
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// long representation... this does not have to do input error checking,
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// because we know that the input will be matched by a suitable regex...
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//
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static uint64_t atoull(const char *Buffer, const char *End) {
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uint64_t Result = 0;
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for (; Buffer != End; Buffer++) {
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uint64_t OldRes = Result;
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Result *= 10;
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Result += *Buffer-'0';
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if (Result < OldRes) { // Uh, oh, overflow detected!!!
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GenerateError("constant bigger than 64 bits detected!");
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return 0;
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}
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}
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return Result;
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}
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static uint64_t HexIntToVal(const char *Buffer, const char *End) {
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uint64_t Result = 0;
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for (; Buffer != End; ++Buffer) {
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uint64_t OldRes = Result;
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Result *= 16;
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char C = *Buffer;
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if (C >= '0' && C <= '9')
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Result += C-'0';
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else if (C >= 'A' && C <= 'F')
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Result += C-'A'+10;
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else if (C >= 'a' && C <= 'f')
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Result += C-'a'+10;
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if (Result < OldRes) { // Uh, oh, overflow detected!!!
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GenerateError("constant bigger than 64 bits detected!");
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return 0;
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}
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}
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return Result;
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}
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// HexToFP - Convert the ascii string in hexadecimal format to the floating
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// point representation of it.
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//
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static double HexToFP(const char *Buffer, const char *End) {
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return BitsToDouble(HexIntToVal(Buffer, End)); // Cast Hex constant to double
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}
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static void HexToIntPair(const char *Buffer, const char *End, uint64_t Pair[2]){
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Pair[0] = 0;
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for (int i=0; i<16; i++, Buffer++) {
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assert(Buffer != End);
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Pair[0] *= 16;
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char C = *Buffer;
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if (C >= '0' && C <= '9')
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Pair[0] += C-'0';
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else if (C >= 'A' && C <= 'F')
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Pair[0] += C-'A'+10;
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else if (C >= 'a' && C <= 'f')
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Pair[0] += C-'a'+10;
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}
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Pair[1] = 0;
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for (int i=0; i<16 && Buffer != End; i++, Buffer++) {
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Pair[1] *= 16;
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char C = *Buffer;
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if (C >= '0' && C <= '9')
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Pair[1] += C-'0';
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else if (C >= 'A' && C <= 'F')
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Pair[1] += C-'A'+10;
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else if (C >= 'a' && C <= 'f')
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Pair[1] += C-'a'+10;
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}
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if (*Buffer)
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GenerateError("constant bigger than 128 bits detected!");
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}
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// UnEscapeLexed - Run through the specified buffer and change \xx codes to the
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// appropriate character.
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static void UnEscapeLexed(std::string &Str) {
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if (Str.empty()) return;
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char *Buffer = &Str[0], *EndBuffer = Buffer+Str.size();
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char *BOut = Buffer;
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for (char *BIn = Buffer; BIn != EndBuffer; ) {
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if (BIn[0] == '\\') {
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if (BIn < EndBuffer-1 && BIn[1] == '\\') {
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*BOut++ = '\\'; // Two \ becomes one
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BIn += 2;
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} else if (BIn < EndBuffer-2 && isxdigit(BIn[1]) && isxdigit(BIn[2])) {
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char Tmp = BIn[3]; BIn[3] = 0; // Terminate string
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*BOut = (char)strtol(BIn+1, 0, 16); // Convert to number
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BIn[3] = Tmp; // Restore character
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BIn += 3; // Skip over handled chars
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++BOut;
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} else {
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*BOut++ = *BIn++;
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}
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} else {
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*BOut++ = *BIn++;
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}
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}
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Str.resize(BOut-Buffer);
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}
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/// isLabelChar - Return true for [-a-zA-Z$._0-9].
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static bool isLabelChar(char C) {
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return isalnum(C) || C == '-' || C == '$' || C == '.' || C == '_';
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}
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/// isLabelTail - Return true if this pointer points to a valid end of a label.
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static const char *isLabelTail(const char *CurPtr) {
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while (1) {
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if (CurPtr[0] == ':') return CurPtr+1;
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if (!isLabelChar(CurPtr[0])) return 0;
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++CurPtr;
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}
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}
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//===----------------------------------------------------------------------===//
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// Lexer definition.
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//===----------------------------------------------------------------------===//
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// FIXME: REMOVE THIS.
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#define YYEOF 0
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#define YYERROR -2
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LLLexer::LLLexer(MemoryBuffer *StartBuf) : CurLineNo(1), CurBuf(StartBuf) {
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CurPtr = CurBuf->getBufferStart();
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}
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std::string LLLexer::getFilename() const {
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return CurBuf->getBufferIdentifier();
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}
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int LLLexer::getNextChar() {
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char CurChar = *CurPtr++;
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switch (CurChar) {
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default: return (unsigned char)CurChar;
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case 0:
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// A nul character in the stream is either the end of the current buffer or
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// a random nul in the file. Disambiguate that here.
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if (CurPtr-1 != CurBuf->getBufferEnd())
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return 0; // Just whitespace.
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// Otherwise, return end of file.
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--CurPtr; // Another call to lex will return EOF again.
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return EOF;
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case '\n':
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case '\r':
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// Handle the newline character by ignoring it and incrementing the line
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// count. However, be careful about 'dos style' files with \n\r in them.
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// Only treat a \n\r or \r\n as a single line.
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if ((*CurPtr == '\n' || (*CurPtr == '\r')) &&
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*CurPtr != CurChar)
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++CurPtr; // Eat the two char newline sequence.
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++CurLineNo;
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return '\n';
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}
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}
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int LLLexer::LexToken() {
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TokStart = CurPtr;
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int CurChar = getNextChar();
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switch (CurChar) {
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default:
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// Handle letters: [a-zA-Z_]
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if (isalpha(CurChar) || CurChar == '_')
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return LexIdentifier();
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return CurChar;
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case EOF: return YYEOF;
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case 0:
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case ' ':
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case '\t':
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case '\n':
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case '\r':
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// Ignore whitespace.
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return LexToken();
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case '+': return LexPositive();
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case '@': return LexAt();
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case '%': return LexPercent();
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case '"': return LexQuote();
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case '.':
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if (const char *Ptr = isLabelTail(CurPtr)) {
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CurPtr = Ptr;
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llvmAsmlval.StrVal = new std::string(TokStart, CurPtr-1);
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return LABELSTR;
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}
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if (CurPtr[0] == '.' && CurPtr[1] == '.') {
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CurPtr += 2;
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return DOTDOTDOT;
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}
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return '.';
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case '$':
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if (const char *Ptr = isLabelTail(CurPtr)) {
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CurPtr = Ptr;
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llvmAsmlval.StrVal = new std::string(TokStart, CurPtr-1);
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return LABELSTR;
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}
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return '$';
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case ';':
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SkipLineComment();
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return LexToken();
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case '0': case '1': case '2': case '3': case '4':
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case '5': case '6': case '7': case '8': case '9':
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case '-':
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return LexDigitOrNegative();
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}
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}
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void LLLexer::SkipLineComment() {
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while (1) {
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if (CurPtr[0] == '\n' || CurPtr[0] == '\r' || getNextChar() == EOF)
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return;
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}
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}
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/// LexAt - Lex all tokens that start with an @ character:
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/// AtStringConstant @\"[^\"]*\"
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/// GlobalVarName @[-a-zA-Z$._][-a-zA-Z$._0-9]*
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/// GlobalVarID @[0-9]+
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int LLLexer::LexAt() {
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// Handle AtStringConstant: @\"[^\"]*\"
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if (CurPtr[0] == '"') {
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++CurPtr;
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while (1) {
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int CurChar = getNextChar();
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if (CurChar == EOF) {
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GenerateError("End of file in global variable name");
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return YYERROR;
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}
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if (CurChar == '"') {
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llvmAsmlval.StrVal = new std::string(TokStart+2, CurPtr-1);
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UnEscapeLexed(*llvmAsmlval.StrVal);
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return ATSTRINGCONSTANT;
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}
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}
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}
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// Handle GlobalVarName: @[-a-zA-Z$._][-a-zA-Z$._0-9]*
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if (isalpha(CurPtr[0]) || CurPtr[0] == '-' || CurPtr[0] == '$' ||
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CurPtr[0] == '.' || CurPtr[0] == '_') {
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++CurPtr;
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while (isalnum(CurPtr[0]) || CurPtr[0] == '-' || CurPtr[0] == '$' ||
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CurPtr[0] == '.' || CurPtr[0] == '_')
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++CurPtr;
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llvmAsmlval.StrVal = new std::string(TokStart+1, CurPtr); // Skip @
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return GLOBALVAR;
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}
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// Handle GlobalVarID: @[0-9]+
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if (isdigit(CurPtr[0])) {
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for (++CurPtr; isdigit(CurPtr[0]); ++CurPtr);
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uint64_t Val = atoull(TokStart+1, CurPtr);
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if ((unsigned)Val != Val)
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GenerateError("Invalid value number (too large)!");
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llvmAsmlval.UIntVal = unsigned(Val);
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return GLOBALVAL_ID;
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}
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return '@';
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}
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/// LexPercent - Lex all tokens that start with a % character:
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/// PctStringConstant %\"[^\"]*\"
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/// LocalVarName %[-a-zA-Z$._][-a-zA-Z$._0-9]*
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/// LocalVarID %[0-9]+
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int LLLexer::LexPercent() {
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// Handle PctStringConstant: %\"[^\"]*\"
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if (CurPtr[0] == '"') {
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++CurPtr;
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while (1) {
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int CurChar = getNextChar();
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if (CurChar == EOF) {
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GenerateError("End of file in local variable name");
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return YYERROR;
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}
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if (CurChar == '"') {
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llvmAsmlval.StrVal = new std::string(TokStart+2, CurPtr-1);
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UnEscapeLexed(*llvmAsmlval.StrVal);
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return PCTSTRINGCONSTANT;
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}
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}
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}
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// Handle LocalVarName: %[-a-zA-Z$._][-a-zA-Z$._0-9]*
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if (isalpha(CurPtr[0]) || CurPtr[0] == '-' || CurPtr[0] == '$' ||
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CurPtr[0] == '.' || CurPtr[0] == '_') {
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++CurPtr;
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while (isalnum(CurPtr[0]) || CurPtr[0] == '-' || CurPtr[0] == '$' ||
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CurPtr[0] == '.' || CurPtr[0] == '_')
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++CurPtr;
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llvmAsmlval.StrVal = new std::string(TokStart+1, CurPtr); // Skip %
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return LOCALVAR;
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}
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// Handle LocalVarID: %[0-9]+
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if (isdigit(CurPtr[0])) {
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for (++CurPtr; isdigit(CurPtr[0]); ++CurPtr);
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uint64_t Val = atoull(TokStart+1, CurPtr);
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if ((unsigned)Val != Val)
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GenerateError("Invalid value number (too large)!");
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llvmAsmlval.UIntVal = unsigned(Val);
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return LOCALVAL_ID;
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}
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return '%';
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}
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/// LexQuote - Lex all tokens that start with a " character:
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/// QuoteLabel "[^"]+":
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/// StringConstant "[^"]*"
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int LLLexer::LexQuote() {
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while (1) {
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int CurChar = getNextChar();
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if (CurChar == EOF) {
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GenerateError("End of file in quoted string");
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return YYERROR;
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}
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if (CurChar != '"') continue;
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if (CurPtr[0] != ':') {
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llvmAsmlval.StrVal = new std::string(TokStart+1, CurPtr-1);
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UnEscapeLexed(*llvmAsmlval.StrVal);
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return STRINGCONSTANT;
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}
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++CurPtr;
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llvmAsmlval.StrVal = new std::string(TokStart+1, CurPtr-2);
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UnEscapeLexed(*llvmAsmlval.StrVal);
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return LABELSTR;
|
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}
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}
|
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|
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static bool JustWhitespaceNewLine(const char *&Ptr) {
|
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const char *ThisPtr = Ptr;
|
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while (*ThisPtr == ' ' || *ThisPtr == '\t')
|
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++ThisPtr;
|
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if (*ThisPtr == '\n' || *ThisPtr == '\r') {
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Ptr = ThisPtr;
|
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return true;
|
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}
|
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return false;
|
||||
}
|
||||
|
||||
|
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/// LexIdentifier: Handle several related productions:
|
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/// Label [-a-zA-Z$._0-9]+:
|
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/// IntegerType i[0-9]+
|
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/// Keyword sdiv, float, ...
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/// HexIntConstant [us]0x[0-9A-Fa-f]+
|
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int LLLexer::LexIdentifier() {
|
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const char *StartChar = CurPtr;
|
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const char *IntEnd = CurPtr[-1] == 'i' ? 0 : StartChar;
|
||||
const char *KeywordEnd = 0;
|
||||
|
||||
for (; isLabelChar(*CurPtr); ++CurPtr) {
|
||||
// If we decide this is an integer, remember the end of the sequence.
|
||||
if (!IntEnd && !isdigit(*CurPtr)) IntEnd = CurPtr;
|
||||
if (!KeywordEnd && !isalnum(*CurPtr) && *CurPtr != '_') KeywordEnd = CurPtr;
|
||||
}
|
||||
|
||||
// If we stopped due to a colon, this really is a label.
|
||||
if (*CurPtr == ':') {
|
||||
llvmAsmlval.StrVal = new std::string(StartChar-1, CurPtr++);
|
||||
return LABELSTR;
|
||||
}
|
||||
|
||||
// Otherwise, this wasn't a label. If this was valid as an integer type,
|
||||
// return it.
|
||||
if (IntEnd == 0) IntEnd = CurPtr;
|
||||
if (IntEnd != StartChar) {
|
||||
CurPtr = IntEnd;
|
||||
uint64_t NumBits = atoull(StartChar, CurPtr);
|
||||
if (NumBits < IntegerType::MIN_INT_BITS ||
|
||||
NumBits > IntegerType::MAX_INT_BITS) {
|
||||
GenerateError("Bitwidth for integer type out of range!");
|
||||
return YYERROR;
|
||||
}
|
||||
const Type* Ty = IntegerType::get(NumBits);
|
||||
llvmAsmlval.PrimType = Ty;
|
||||
return INTTYPE;
|
||||
}
|
||||
|
||||
// Otherwise, this was a letter sequence. See which keyword this is.
|
||||
if (KeywordEnd == 0) KeywordEnd = CurPtr;
|
||||
CurPtr = KeywordEnd;
|
||||
--StartChar;
|
||||
unsigned Len = CurPtr-StartChar;
|
||||
#define KEYWORD(STR, TOK) \
|
||||
if (Len == strlen(STR) && !memcmp(StartChar, STR, strlen(STR))) return TOK;
|
||||
|
||||
KEYWORD("begin", BEGINTOK);
|
||||
KEYWORD("end", ENDTOK);
|
||||
KEYWORD("true", TRUETOK);
|
||||
KEYWORD("false", FALSETOK);
|
||||
KEYWORD("declare", DECLARE);
|
||||
KEYWORD("define", DEFINE);
|
||||
KEYWORD("global", GLOBAL);
|
||||
KEYWORD("constant", CONSTANT);
|
||||
|
||||
KEYWORD("internal", INTERNAL);
|
||||
KEYWORD("linkonce", LINKONCE);
|
||||
KEYWORD("weak", WEAK);
|
||||
KEYWORD("appending", APPENDING);
|
||||
KEYWORD("dllimport", DLLIMPORT);
|
||||
KEYWORD("dllexport", DLLEXPORT);
|
||||
KEYWORD("hidden", HIDDEN);
|
||||
KEYWORD("protected", PROTECTED);
|
||||
KEYWORD("extern_weak", EXTERN_WEAK);
|
||||
KEYWORD("external", EXTERNAL);
|
||||
KEYWORD("thread_local", THREAD_LOCAL);
|
||||
KEYWORD("zeroinitializer", ZEROINITIALIZER);
|
||||
KEYWORD("undef", UNDEF);
|
||||
KEYWORD("null", NULL_TOK);
|
||||
KEYWORD("to", TO);
|
||||
KEYWORD("tail", TAIL);
|
||||
KEYWORD("target", TARGET);
|
||||
KEYWORD("triple", TRIPLE);
|
||||
KEYWORD("deplibs", DEPLIBS);
|
||||
KEYWORD("datalayout", DATALAYOUT);
|
||||
KEYWORD("volatile", VOLATILE);
|
||||
KEYWORD("align", ALIGN);
|
||||
KEYWORD("section", SECTION);
|
||||
KEYWORD("alias", ALIAS);
|
||||
KEYWORD("module", MODULE);
|
||||
KEYWORD("asm", ASM_TOK);
|
||||
KEYWORD("sideeffect", SIDEEFFECT);
|
||||
|
||||
KEYWORD("cc", CC_TOK);
|
||||
KEYWORD("ccc", CCC_TOK);
|
||||
KEYWORD("fastcc", FASTCC_TOK);
|
||||
KEYWORD("coldcc", COLDCC_TOK);
|
||||
KEYWORD("x86_stdcallcc", X86_STDCALLCC_TOK);
|
||||
KEYWORD("x86_fastcallcc", X86_FASTCALLCC_TOK);
|
||||
|
||||
KEYWORD("signext", SIGNEXT);
|
||||
KEYWORD("zeroext", ZEROEXT);
|
||||
KEYWORD("inreg", INREG);
|
||||
KEYWORD("sret", SRET);
|
||||
KEYWORD("nounwind", NOUNWIND);
|
||||
KEYWORD("noreturn", NORETURN);
|
||||
KEYWORD("noalias", NOALIAS);
|
||||
KEYWORD("byval", BYVAL);
|
||||
KEYWORD("nest", NEST);
|
||||
KEYWORD("pure", PURE);
|
||||
KEYWORD("const", CONST);
|
||||
|
||||
KEYWORD("type", TYPE);
|
||||
KEYWORD("opaque", OPAQUE);
|
||||
|
||||
KEYWORD("eq" , EQ);
|
||||
KEYWORD("ne" , NE);
|
||||
KEYWORD("slt", SLT);
|
||||
KEYWORD("sgt", SGT);
|
||||
KEYWORD("sle", SLE);
|
||||
KEYWORD("sge", SGE);
|
||||
KEYWORD("ult", ULT);
|
||||
KEYWORD("ugt", UGT);
|
||||
KEYWORD("ule", ULE);
|
||||
KEYWORD("uge", UGE);
|
||||
KEYWORD("oeq", OEQ);
|
||||
KEYWORD("one", ONE);
|
||||
KEYWORD("olt", OLT);
|
||||
KEYWORD("ogt", OGT);
|
||||
KEYWORD("ole", OLE);
|
||||
KEYWORD("oge", OGE);
|
||||
KEYWORD("ord", ORD);
|
||||
KEYWORD("uno", UNO);
|
||||
KEYWORD("ueq", UEQ);
|
||||
KEYWORD("une", UNE);
|
||||
#undef KEYWORD
|
||||
|
||||
// Keywords for types.
|
||||
#define TYPEKEYWORD(STR, LLVMTY, TOK) \
|
||||
if (Len == strlen(STR) && !memcmp(StartChar, STR, strlen(STR))) { \
|
||||
llvmAsmlval.PrimType = LLVMTY; return TOK; }
|
||||
TYPEKEYWORD("void", Type::VoidTy, VOID);
|
||||
TYPEKEYWORD("float", Type::FloatTy, FLOAT);
|
||||
TYPEKEYWORD("double", Type::DoubleTy, DOUBLE);
|
||||
TYPEKEYWORD("x86_fp80", Type::X86_FP80Ty, X86_FP80);
|
||||
TYPEKEYWORD("fp128", Type::FP128Ty, FP128);
|
||||
TYPEKEYWORD("ppc_fp128", Type::PPC_FP128Ty, PPC_FP128);
|
||||
TYPEKEYWORD("label", Type::LabelTy, LABEL);
|
||||
#undef TYPEKEYWORD
|
||||
|
||||
// Handle special forms for autoupgrading. Drop these in LLVM 3.0. This is
|
||||
// to avoid conflicting with the sext/zext instructions, below.
|
||||
if (Len == 4 && !memcmp(StartChar, "sext", 4)) {
|
||||
// Scan CurPtr ahead, seeing if there is just whitespace before the newline.
|
||||
if (JustWhitespaceNewLine(CurPtr))
|
||||
return SIGNEXT;
|
||||
} else if (Len == 4 && !memcmp(StartChar, "zext", 4)) {
|
||||
// Scan CurPtr ahead, seeing if there is just whitespace before the newline.
|
||||
if (JustWhitespaceNewLine(CurPtr))
|
||||
return ZEROEXT;
|
||||
}
|
||||
|
||||
// Keywords for instructions.
|
||||
#define INSTKEYWORD(STR, type, Enum, TOK) \
|
||||
if (Len == strlen(STR) && !memcmp(StartChar, STR, strlen(STR))) { \
|
||||
llvmAsmlval.type = Instruction::Enum; return TOK; }
|
||||
|
||||
INSTKEYWORD("add", BinaryOpVal, Add, ADD);
|
||||
INSTKEYWORD("sub", BinaryOpVal, Sub, SUB);
|
||||
INSTKEYWORD("mul", BinaryOpVal, Mul, MUL);
|
||||
INSTKEYWORD("udiv", BinaryOpVal, UDiv, UDIV);
|
||||
INSTKEYWORD("sdiv", BinaryOpVal, SDiv, SDIV);
|
||||
INSTKEYWORD("fdiv", BinaryOpVal, FDiv, FDIV);
|
||||
INSTKEYWORD("urem", BinaryOpVal, URem, UREM);
|
||||
INSTKEYWORD("srem", BinaryOpVal, SRem, SREM);
|
||||
INSTKEYWORD("frem", BinaryOpVal, FRem, FREM);
|
||||
INSTKEYWORD("shl", BinaryOpVal, Shl, SHL);
|
||||
INSTKEYWORD("lshr", BinaryOpVal, LShr, LSHR);
|
||||
INSTKEYWORD("ashr", BinaryOpVal, AShr, ASHR);
|
||||
INSTKEYWORD("and", BinaryOpVal, And, AND);
|
||||
INSTKEYWORD("or", BinaryOpVal, Or , OR );
|
||||
INSTKEYWORD("xor", BinaryOpVal, Xor, XOR);
|
||||
INSTKEYWORD("icmp", OtherOpVal, ICmp, ICMP);
|
||||
INSTKEYWORD("fcmp", OtherOpVal, FCmp, FCMP);
|
||||
|
||||
INSTKEYWORD("phi", OtherOpVal, PHI, PHI_TOK);
|
||||
INSTKEYWORD("call", OtherOpVal, Call, CALL);
|
||||
INSTKEYWORD("trunc", CastOpVal, Trunc, TRUNC);
|
||||
INSTKEYWORD("zext", CastOpVal, ZExt, ZEXT);
|
||||
INSTKEYWORD("sext", CastOpVal, SExt, SEXT);
|
||||
INSTKEYWORD("fptrunc", CastOpVal, FPTrunc, FPTRUNC);
|
||||
INSTKEYWORD("fpext", CastOpVal, FPExt, FPEXT);
|
||||
INSTKEYWORD("uitofp", CastOpVal, UIToFP, UITOFP);
|
||||
INSTKEYWORD("sitofp", CastOpVal, SIToFP, SITOFP);
|
||||
INSTKEYWORD("fptoui", CastOpVal, FPToUI, FPTOUI);
|
||||
INSTKEYWORD("fptosi", CastOpVal, FPToSI, FPTOSI);
|
||||
INSTKEYWORD("inttoptr", CastOpVal, IntToPtr, INTTOPTR);
|
||||
INSTKEYWORD("ptrtoint", CastOpVal, PtrToInt, PTRTOINT);
|
||||
INSTKEYWORD("bitcast", CastOpVal, BitCast, BITCAST);
|
||||
INSTKEYWORD("select", OtherOpVal, Select, SELECT);
|
||||
INSTKEYWORD("va_arg", OtherOpVal, VAArg , VAARG);
|
||||
INSTKEYWORD("ret", TermOpVal, Ret, RET);
|
||||
INSTKEYWORD("br", TermOpVal, Br, BR);
|
||||
INSTKEYWORD("switch", TermOpVal, Switch, SWITCH);
|
||||
INSTKEYWORD("invoke", TermOpVal, Invoke, INVOKE);
|
||||
INSTKEYWORD("unwind", TermOpVal, Unwind, UNWIND);
|
||||
INSTKEYWORD("unreachable", TermOpVal, Unreachable, UNREACHABLE);
|
||||
|
||||
INSTKEYWORD("malloc", MemOpVal, Malloc, MALLOC);
|
||||
INSTKEYWORD("alloca", MemOpVal, Alloca, ALLOCA);
|
||||
INSTKEYWORD("free", MemOpVal, Free, FREE);
|
||||
INSTKEYWORD("load", MemOpVal, Load, LOAD);
|
||||
INSTKEYWORD("store", MemOpVal, Store, STORE);
|
||||
INSTKEYWORD("getelementptr", MemOpVal, GetElementPtr, GETELEMENTPTR);
|
||||
|
||||
INSTKEYWORD("extractelement", OtherOpVal, ExtractElement, EXTRACTELEMENT);
|
||||
INSTKEYWORD("insertelement", OtherOpVal, InsertElement, INSERTELEMENT);
|
||||
INSTKEYWORD("shufflevector", OtherOpVal, ShuffleVector, SHUFFLEVECTOR);
|
||||
#undef INSTKEYWORD
|
||||
|
||||
// Check for [us]0x[0-9A-Fa-f]+ which are Hexadecimal constant generated by
|
||||
// the CFE to avoid forcing it to deal with 64-bit numbers.
|
||||
if ((TokStart[0] == 'u' || TokStart[0] == 's') &&
|
||||
TokStart[1] == '0' && TokStart[2] == 'x' && isxdigit(TokStart[3])) {
|
||||
int len = CurPtr-TokStart-3;
|
||||
uint32_t bits = len * 4;
|
||||
APInt Tmp(bits, TokStart+3, len, 16);
|
||||
uint32_t activeBits = Tmp.getActiveBits();
|
||||
if (activeBits > 0 && activeBits < bits)
|
||||
Tmp.trunc(activeBits);
|
||||
if (Tmp.getBitWidth() > 64) {
|
||||
llvmAsmlval.APIntVal = new APInt(Tmp);
|
||||
return TokStart[0] == 's' ? ESAPINTVAL : EUAPINTVAL;
|
||||
} else if (TokStart[0] == 's') {
|
||||
llvmAsmlval.SInt64Val = Tmp.getSExtValue();
|
||||
return ESINT64VAL;
|
||||
} else {
|
||||
llvmAsmlval.UInt64Val = Tmp.getZExtValue();
|
||||
return EUINT64VAL;
|
||||
}
|
||||
}
|
||||
|
||||
// Finally, if this is "cc1234", return this as just "cc".
|
||||
if (TokStart[0] == 'c' && TokStart[1] == 'c') {
|
||||
CurPtr = TokStart+2;
|
||||
return CC_TOK;
|
||||
}
|
||||
|
||||
// Finally, if this isn't known, return just a single character.
|
||||
CurPtr = TokStart+1;
|
||||
return TokStart[0];
|
||||
}
|
||||
|
||||
|
||||
/// Lex0x: Handle productions that start with 0x, knowing that it matches and
|
||||
/// that this is not a label:
|
||||
/// HexFPConstant 0x[0-9A-Fa-f]+
|
||||
/// HexFP80Constant 0xK[0-9A-Fa-f]+
|
||||
/// HexFP128Constant 0xL[0-9A-Fa-f]+
|
||||
/// HexPPC128Constant 0xM[0-9A-Fa-f]+
|
||||
int LLLexer::Lex0x() {
|
||||
CurPtr = TokStart + 2;
|
||||
|
||||
char Kind;
|
||||
if (CurPtr[0] >= 'K' && CurPtr[0] <= 'M') {
|
||||
Kind = *CurPtr++;
|
||||
} else {
|
||||
Kind = 'J';
|
||||
}
|
||||
|
||||
if (!isxdigit(CurPtr[0])) {
|
||||
// Bad token, return it as just zero.
|
||||
CurPtr = TokStart+1;
|
||||
return '0';
|
||||
}
|
||||
|
||||
while (isxdigit(CurPtr[0]))
|
||||
++CurPtr;
|
||||
|
||||
if (Kind == 'J') {
|
||||
// HexFPConstant - Floating point constant represented in IEEE format as a
|
||||
// hexadecimal number for when exponential notation is not precise enough.
|
||||
// Float and double only.
|
||||
llvmAsmlval.FPVal = new APFloat(HexToFP(TokStart+2, CurPtr));
|
||||
return FPVAL;
|
||||
}
|
||||
|
||||
uint64_t Pair[2];
|
||||
HexToIntPair(TokStart+3, CurPtr, Pair);
|
||||
switch (Kind) {
|
||||
default: assert(0 && "Unknown kind!");
|
||||
case 'K':
|
||||
// F80HexFPConstant - x87 long double in hexadecimal format (10 bytes)
|
||||
llvmAsmlval.FPVal = new APFloat(APInt(80, 2, Pair));
|
||||
return FPVAL;
|
||||
case 'L':
|
||||
// F128HexFPConstant - IEEE 128-bit in hexadecimal format (16 bytes)
|
||||
llvmAsmlval.FPVal = new APFloat(APInt(128, 2, Pair), true);
|
||||
return FPVAL;
|
||||
case 'M':
|
||||
// PPC128HexFPConstant - PowerPC 128-bit in hexadecimal format (16 bytes)
|
||||
llvmAsmlval.FPVal = new APFloat(APInt(128, 2, Pair));
|
||||
return FPVAL;
|
||||
}
|
||||
}
|
||||
|
||||
/// LexIdentifier: Handle several related productions:
|
||||
/// Label [-a-zA-Z$._0-9]+:
|
||||
/// NInteger -[0-9]+
|
||||
/// FPConstant [-+]?[0-9]+[.][0-9]*([eE][-+]?[0-9]+)?
|
||||
/// PInteger [0-9]+
|
||||
/// HexFPConstant 0x[0-9A-Fa-f]+
|
||||
/// HexFP80Constant 0xK[0-9A-Fa-f]+
|
||||
/// HexFP128Constant 0xL[0-9A-Fa-f]+
|
||||
/// HexPPC128Constant 0xM[0-9A-Fa-f]+
|
||||
int LLLexer::LexDigitOrNegative() {
|
||||
// If the letter after the negative is a number, this is probably a label.
|
||||
if (!isdigit(TokStart[0]) && !isdigit(CurPtr[0])) {
|
||||
// Okay, this is not a number after the -, it's probably a label.
|
||||
if (const char *End = isLabelTail(CurPtr)) {
|
||||
llvmAsmlval.StrVal = new std::string(TokStart, End-1);
|
||||
CurPtr = End;
|
||||
return LABELSTR;
|
||||
}
|
||||
|
||||
return CurPtr[-1];
|
||||
}
|
||||
|
||||
// At this point, it is either a label, int or fp constant.
|
||||
|
||||
// Skip digits, we have at least one.
|
||||
for (; isdigit(CurPtr[0]); ++CurPtr);
|
||||
|
||||
// Check to see if this really is a label afterall, e.g. "-1:".
|
||||
if (isLabelChar(CurPtr[0]) || CurPtr[0] == ':') {
|
||||
if (const char *End = isLabelTail(CurPtr)) {
|
||||
llvmAsmlval.StrVal = new std::string(TokStart, End-1);
|
||||
CurPtr = End;
|
||||
return LABELSTR;
|
||||
}
|
||||
}
|
||||
|
||||
// If the next character is a '.', then it is a fp value, otherwise its
|
||||
// integer.
|
||||
if (CurPtr[0] != '.') {
|
||||
if (TokStart[0] == '0' && TokStart[1] == 'x')
|
||||
return Lex0x();
|
||||
unsigned Len = CurPtr-TokStart;
|
||||
uint32_t numBits = ((Len * 64) / 19) + 2;
|
||||
APInt Tmp(numBits, TokStart, Len, 10);
|
||||
if (TokStart[0] == '-') {
|
||||
uint32_t minBits = Tmp.getMinSignedBits();
|
||||
if (minBits > 0 && minBits < numBits)
|
||||
Tmp.trunc(minBits);
|
||||
if (Tmp.getBitWidth() > 64) {
|
||||
llvmAsmlval.APIntVal = new APInt(Tmp);
|
||||
return ESAPINTVAL;
|
||||
} else {
|
||||
llvmAsmlval.SInt64Val = Tmp.getSExtValue();
|
||||
return ESINT64VAL;
|
||||
}
|
||||
} else {
|
||||
uint32_t activeBits = Tmp.getActiveBits();
|
||||
if (activeBits > 0 && activeBits < numBits)
|
||||
Tmp.trunc(activeBits);
|
||||
if (Tmp.getBitWidth() > 64) {
|
||||
llvmAsmlval.APIntVal = new APInt(Tmp);
|
||||
return EUAPINTVAL;
|
||||
} else {
|
||||
llvmAsmlval.UInt64Val = Tmp.getZExtValue();
|
||||
return EUINT64VAL;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
++CurPtr;
|
||||
|
||||
// Skip over [0-9]*([eE][-+]?[0-9]+)?
|
||||
while (isdigit(CurPtr[0])) ++CurPtr;
|
||||
|
||||
if (CurPtr[0] == 'e' || CurPtr[0] == 'E') {
|
||||
if (isdigit(CurPtr[1]) ||
|
||||
((CurPtr[1] == '-' || CurPtr[1] == '+') && isdigit(CurPtr[2]))) {
|
||||
CurPtr += 2;
|
||||
while (isdigit(CurPtr[0])) ++CurPtr;
|
||||
}
|
||||
}
|
||||
|
||||
llvmAsmlval.FPVal = new APFloat(atof(TokStart));
|
||||
return FPVAL;
|
||||
}
|
||||
|
||||
/// FPConstant [-+]?[0-9]+[.][0-9]*([eE][-+]?[0-9]+)?
|
||||
int LLLexer::LexPositive() {
|
||||
// If the letter after the negative is a number, this is probably not a
|
||||
// label.
|
||||
if (!isdigit(CurPtr[0]))
|
||||
return CurPtr[-1];
|
||||
|
||||
// Skip digits.
|
||||
for (++CurPtr; isdigit(CurPtr[0]); ++CurPtr);
|
||||
|
||||
// At this point, we need a '.'.
|
||||
if (CurPtr[0] != '.') {
|
||||
CurPtr = TokStart+1;
|
||||
return TokStart[0];
|
||||
}
|
||||
|
||||
++CurPtr;
|
||||
|
||||
// Skip over [0-9]*([eE][-+]?[0-9]+)?
|
||||
while (isdigit(CurPtr[0])) ++CurPtr;
|
||||
|
||||
if (CurPtr[0] == 'e' || CurPtr[0] == 'E') {
|
||||
if (isdigit(CurPtr[1]) ||
|
||||
((CurPtr[1] == '-' || CurPtr[1] == '+') && isdigit(CurPtr[2]))) {
|
||||
CurPtr += 2;
|
||||
while (isdigit(CurPtr[0])) ++CurPtr;
|
||||
}
|
||||
}
|
||||
|
||||
llvmAsmlval.FPVal = new APFloat(atof(TokStart));
|
||||
return FPVAL;
|
||||
}
|
||||
|
||||
|
||||
//===----------------------------------------------------------------------===//
|
||||
// Define the interface to this file.
|
||||
//===----------------------------------------------------------------------===//
|
||||
|
||||
static LLLexer *TheLexer;
|
||||
|
||||
void InitLLLexer(llvm::MemoryBuffer *MB) {
|
||||
assert(TheLexer == 0 && "LL Lexer isn't reentrant yet");
|
||||
TheLexer = new LLLexer(MB);
|
||||
}
|
||||
|
||||
int llvmAsmlex() {
|
||||
return TheLexer->LexToken();
|
||||
}
|
||||
const char *LLLgetTokenStart() { return TheLexer->getTokStart(); }
|
||||
unsigned LLLgetTokenLength() { return TheLexer->getTokLength(); }
|
||||
std::string LLLgetFilename() { return TheLexer->getFilename(); }
|
||||
unsigned LLLgetLineNo() { return TheLexer->getLineNo(); }
|
||||
|
||||
void FreeLexer() {
|
||||
delete TheLexer;
|
||||
TheLexer = 0;
|
||||
}
|
||||
Reference in New Issue
Block a user