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https://github.com/c64scene-ar/llvm-6502.git
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Add support for specifying alignment and size of setjmp jmpbufs. No targets currently do anything with this information, nor is it presrved in the bytecode representation. That's coming up next. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24196 91177308-0d34-0410-b5e6-96231b3b80d8
349 lines
12 KiB
C++
349 lines
12 KiB
C++
/*===-- Lexer.l - Scanner for llvm assembly files --------------*- C++ -*--===//
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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 the LLVM research group 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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// This file implements the flex scanner for LLVM assembly languages files.
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//
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//===----------------------------------------------------------------------===*/
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%option prefix="llvmAsm"
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%option yylineno
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%option nostdinit
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%option never-interactive
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%option batch
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%option noyywrap
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%option nodefault
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%option 8bit
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%option outfile="Lexer.cpp"
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%option ecs
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%option noreject
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%option noyymore
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%{
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#include "ParserInternals.h"
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#include "llvm/Module.h"
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#include <list>
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#include "llvmAsmParser.h"
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#include <cctype>
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#include <cstdlib>
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void set_scan_file(FILE * F){
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yy_switch_to_buffer(yy_create_buffer( F, YY_BUF_SIZE ) );
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}
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void set_scan_string (const char * str) {
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yy_scan_string (str);
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}
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#define RET_TOK(type, Enum, sym) \
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llvmAsmlval.type = Instruction::Enum; return sym
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namespace llvm {
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// TODO: All of the static identifiers are figured out by the lexer,
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// these should be hashed to reduce the lexer size
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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) {
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uint64_t Result = 0;
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for (; *Buffer; 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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ThrowException("constant bigger than 64 bits detected!");
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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) {
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uint64_t Result = 0;
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for (; *Buffer; ++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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ThrowException("constant bigger than 64 bits detected!");
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}
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return Result;
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}
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// HexToFP - Convert the ascii string in hexidecimal 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) {
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// Behave nicely in the face of C TBAA rules... see:
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// http://www.nullstone.com/htmls/category/aliastyp.htm
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union {
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uint64_t UI;
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double FP;
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} UIntToFP;
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UIntToFP.UI = HexIntToVal(Buffer);
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assert(sizeof(double) == sizeof(uint64_t) &&
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"Data sizes incompatible on this target!");
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return UIntToFP.FP; // Cast Hex constant to double
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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. If AllowNull is set to false, a \00 value will cause
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// an exception to be thrown.
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//
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// If AllowNull is set to true, the return value of the function points to the
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// last character of the string in memory.
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//
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char *UnEscapeLexed(char *Buffer, bool AllowNull) {
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char *BOut = Buffer;
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for (char *BIn = Buffer; *BIn; ) {
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if (BIn[0] == '\\' && 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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if (!AllowNull && !*BOut)
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ThrowException("String literal cannot accept \\00 escape!");
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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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}
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return BOut;
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}
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} // End llvm namespace
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using namespace llvm;
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#define YY_NEVER_INTERACTIVE 1
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%}
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/* Comments start with a ; and go till end of line */
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Comment ;.*
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/* Variable(Value) identifiers start with a % sign */
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VarID %[-a-zA-Z$._][-a-zA-Z$._0-9]*
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/* Label identifiers end with a colon */
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Label [-a-zA-Z$._0-9]+:
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QuoteLabel \"[^\"]+\":
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/* Quoted names can contain any character except " and \ */
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StringConstant \"[^\"]*\"
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/* [PN]Integer: match positive and negative literal integer values that
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* are preceeded by a '%' character. These represent unnamed variable slots.
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*/
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EPInteger %[0-9]+
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ENInteger %-[0-9]+
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/* E[PN]Integer: match positive and negative literal integer values */
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PInteger [0-9]+
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NInteger -[0-9]+
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/* FPConstant - A Floating point constant.
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*/
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FPConstant [-+]?[0-9]+[.][0-9]*([eE][-+]?[0-9]+)?
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/* HexFPConstant - Floating point constant represented in IEEE format as a
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* hexadecimal number for when exponential notation is not precise enough.
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*/
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HexFPConstant 0x[0-9A-Fa-f]+
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/* HexIntConstant - Hexadecimal constant generated by the CFE to avoid forcing
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* it to deal with 64 bit numbers.
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*/
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HexIntConstant [us]0x[0-9A-Fa-f]+
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%%
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{Comment} { /* Ignore comments for now */ }
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begin { return BEGINTOK; }
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end { return ENDTOK; }
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true { return TRUETOK; }
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false { return FALSETOK; }
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declare { return DECLARE; }
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global { return GLOBAL; }
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constant { return CONSTANT; }
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internal { return INTERNAL; }
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linkonce { return LINKONCE; }
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weak { return WEAK; }
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appending { return APPENDING; }
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uninitialized { return EXTERNAL; } /* Deprecated, turn into external */
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external { return EXTERNAL; }
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implementation { return IMPLEMENTATION; }
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zeroinitializer { return ZEROINITIALIZER; }
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\.\.\. { return DOTDOTDOT; }
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undef { return UNDEF; }
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null { return NULL_TOK; }
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to { return TO; }
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except { RET_TOK(TermOpVal, Unwind, UNWIND); }
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not { return NOT; } /* Deprecated, turned into XOR */
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tail { return TAIL; }
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target { return TARGET; }
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triple { return TRIPLE; }
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deplibs { return DEPLIBS; }
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endian { return ENDIAN; }
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pointersize { return POINTERSIZE; }
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little { return LITTLE; }
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big { return BIG; }
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volatile { return VOLATILE; }
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cc { return CC_TOK; }
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ccc { return CCC_TOK; }
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fastcc { return FASTCC_TOK; }
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coldcc { return COLDCC_TOK; }
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void { llvmAsmlval.PrimType = Type::VoidTy ; return VOID; }
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bool { llvmAsmlval.PrimType = Type::BoolTy ; return BOOL; }
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sbyte { llvmAsmlval.PrimType = Type::SByteTy ; return SBYTE; }
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ubyte { llvmAsmlval.PrimType = Type::UByteTy ; return UBYTE; }
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short { llvmAsmlval.PrimType = Type::ShortTy ; return SHORT; }
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ushort { llvmAsmlval.PrimType = Type::UShortTy; return USHORT; }
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int { llvmAsmlval.PrimType = Type::IntTy ; return INT; }
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uint { llvmAsmlval.PrimType = Type::UIntTy ; return UINT; }
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long { llvmAsmlval.PrimType = Type::LongTy ; return LONG; }
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ulong { llvmAsmlval.PrimType = Type::ULongTy ; return ULONG; }
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float { llvmAsmlval.PrimType = Type::FloatTy ; return FLOAT; }
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double { llvmAsmlval.PrimType = Type::DoubleTy; return DOUBLE; }
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label { llvmAsmlval.PrimType = Type::LabelTy ; return LABEL; }
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type { return TYPE; }
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opaque { return OPAQUE; }
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align { return ALIGN; }
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add { RET_TOK(BinaryOpVal, Add, ADD); }
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sub { RET_TOK(BinaryOpVal, Sub, SUB); }
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mul { RET_TOK(BinaryOpVal, Mul, MUL); }
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div { RET_TOK(BinaryOpVal, Div, DIV); }
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rem { RET_TOK(BinaryOpVal, Rem, REM); }
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and { RET_TOK(BinaryOpVal, And, AND); }
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or { RET_TOK(BinaryOpVal, Or , OR ); }
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xor { RET_TOK(BinaryOpVal, Xor, XOR); }
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setne { RET_TOK(BinaryOpVal, SetNE, SETNE); }
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seteq { RET_TOK(BinaryOpVal, SetEQ, SETEQ); }
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setlt { RET_TOK(BinaryOpVal, SetLT, SETLT); }
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setgt { RET_TOK(BinaryOpVal, SetGT, SETGT); }
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setle { RET_TOK(BinaryOpVal, SetLE, SETLE); }
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setge { RET_TOK(BinaryOpVal, SetGE, SETGE); }
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phi { RET_TOK(OtherOpVal, PHI, PHI_TOK); }
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call { RET_TOK(OtherOpVal, Call, CALL); }
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cast { RET_TOK(OtherOpVal, Cast, CAST); }
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select { RET_TOK(OtherOpVal, Select, SELECT); }
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shl { RET_TOK(OtherOpVal, Shl, SHL); }
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shr { RET_TOK(OtherOpVal, Shr, SHR); }
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vanext { return VANEXT_old; }
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vaarg { return VAARG_old; }
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va_arg { RET_TOK(OtherOpVal, VAArg , VAARG); }
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ret { RET_TOK(TermOpVal, Ret, RET); }
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br { RET_TOK(TermOpVal, Br, BR); }
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switch { RET_TOK(TermOpVal, Switch, SWITCH); }
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invoke { RET_TOK(TermOpVal, Invoke, INVOKE); }
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unwind { RET_TOK(TermOpVal, Unwind, UNWIND); }
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unreachable { RET_TOK(TermOpVal, Unreachable, UNREACHABLE); }
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malloc { RET_TOK(MemOpVal, Malloc, MALLOC); }
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alloca { RET_TOK(MemOpVal, Alloca, ALLOCA); }
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free { RET_TOK(MemOpVal, Free, FREE); }
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load { RET_TOK(MemOpVal, Load, LOAD); }
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store { RET_TOK(MemOpVal, Store, STORE); }
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getelementptr { RET_TOK(MemOpVal, GetElementPtr, GETELEMENTPTR); }
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{VarID} {
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UnEscapeLexed(yytext+1);
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llvmAsmlval.StrVal = strdup(yytext+1); // Skip %
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return VAR_ID;
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}
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{Label} {
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yytext[strlen(yytext)-1] = 0; // nuke colon
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UnEscapeLexed(yytext);
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llvmAsmlval.StrVal = strdup(yytext);
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return LABELSTR;
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}
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{QuoteLabel} {
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yytext[strlen(yytext)-2] = 0; // nuke colon, end quote
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UnEscapeLexed(yytext+1);
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llvmAsmlval.StrVal = strdup(yytext+1);
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return LABELSTR;
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}
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{StringConstant} { // Note that we cannot unescape a string constant here! The
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// string constant might contain a \00 which would not be
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// understood by the string stuff. It is valid to make a
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// [sbyte] c"Hello World\00" constant, for example.
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//
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yytext[strlen(yytext)-1] = 0; // nuke end quote
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llvmAsmlval.StrVal = strdup(yytext+1); // Nuke start quote
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return STRINGCONSTANT;
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}
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{PInteger} { llvmAsmlval.UInt64Val = atoull(yytext); return EUINT64VAL; }
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{NInteger} {
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uint64_t Val = atoull(yytext+1);
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// +1: we have bigger negative range
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if (Val > (uint64_t)INT64_MAX+1)
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ThrowException("Constant too large for signed 64 bits!");
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llvmAsmlval.SInt64Val = -Val;
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return ESINT64VAL;
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}
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{HexIntConstant} {
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llvmAsmlval.UInt64Val = HexIntToVal(yytext+3);
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return yytext[0] == 's' ? ESINT64VAL : EUINT64VAL;
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}
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{EPInteger} {
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uint64_t Val = atoull(yytext+1);
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if ((unsigned)Val != Val)
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ThrowException("Invalid value number (too large)!");
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llvmAsmlval.UIntVal = unsigned(Val);
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return UINTVAL;
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}
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{ENInteger} {
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uint64_t Val = atoull(yytext+2);
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// +1: we have bigger negative range
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if (Val > (uint64_t)INT32_MAX+1)
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ThrowException("Constant too large for signed 32 bits!");
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llvmAsmlval.SIntVal = (int)-Val;
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return SINTVAL;
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}
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{FPConstant} { llvmAsmlval.FPVal = atof(yytext); return FPVAL; }
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{HexFPConstant} { llvmAsmlval.FPVal = HexToFP(yytext); return FPVAL; }
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<<EOF>> {
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/* Make sure to free the internal buffers for flex when we are
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* done reading our input!
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*/
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yy_delete_buffer(YY_CURRENT_BUFFER);
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return EOF;
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}
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[ \r\t\n] { /* Ignore whitespace */ }
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. { return yytext[0]; }
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%%
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