mirror of
https://github.com/RPCS3/llvm-mirror.git
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446 lines
16 KiB
C++
446 lines
16 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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// Construct a token value for a non-obsolete token
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#define RET_TOK(type, Enum, sym) \
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llvmAsmlval.type = Instruction::Enum; \
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return sym
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// Construct a token value for an obsolete token
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#define RET_TY(CTYPE, SYM) \
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llvmAsmlval.PrimType = CTYPE;\
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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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GenerateError("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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GenerateError("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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GenerateError("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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/* Local Values and Type identifiers start with a % sign */
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LocalVarName %[-a-zA-Z$._][-a-zA-Z$._0-9]*
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/* Global Value identifiers start with an @ sign */
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GlobalVarName @[-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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AtStringConstant @\"[^\"]*\"
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/* LocalVarID/GlobalVarID: match an unnamed local variable slot ID. */
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LocalVarID %[0-9]+
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GlobalVarID @[0-9]+
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/* Integer types are specified with i and a bitwidth */
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IntegerType i[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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define { return DEFINE; }
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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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dllimport { return DLLIMPORT; }
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dllexport { return DLLEXPORT; }
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hidden { return HIDDEN; }
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protected { return PROTECTED; }
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extern_weak { return EXTERN_WEAK; }
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external { return EXTERNAL; }
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thread_local { return THREAD_LOCAL; }
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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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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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datalayout { return DATALAYOUT; }
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volatile { return VOLATILE; }
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align { return ALIGN; }
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section { return SECTION; }
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alias { return ALIAS; }
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module { return MODULE; }
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asm { return ASM_TOK; }
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sideeffect { return SIDEEFFECT; }
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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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x86_stdcallcc { return X86_STDCALLCC_TOK; }
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x86_fastcallcc { return X86_FASTCALLCC_TOK; }
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inreg { return INREG; }
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sret { return SRET; }
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nounwind { return NOUNWIND; }
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noreturn { return NORETURN; }
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void { RET_TY(Type::VoidTy, VOID); }
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float { RET_TY(Type::FloatTy, FLOAT); }
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double { RET_TY(Type::DoubleTy,DOUBLE);}
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label { RET_TY(Type::LabelTy, LABEL); }
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type { return TYPE; }
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opaque { return OPAQUE; }
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{IntegerType} { uint64_t NumBits = atoull(yytext+1);
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if (NumBits < IntegerType::MIN_INT_BITS ||
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NumBits > IntegerType::MAX_INT_BITS)
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GenerateError("Bitwidth for integer type out of range!");
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const Type* Ty = IntegerType::get(NumBits);
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RET_TY(Ty, INTTYPE);
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}
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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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udiv { RET_TOK(BinaryOpVal, UDiv, UDIV); }
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sdiv { RET_TOK(BinaryOpVal, SDiv, SDIV); }
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fdiv { RET_TOK(BinaryOpVal, FDiv, FDIV); }
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urem { RET_TOK(BinaryOpVal, URem, UREM); }
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srem { RET_TOK(BinaryOpVal, SRem, SREM); }
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frem { RET_TOK(BinaryOpVal, FRem, FREM); }
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shl { RET_TOK(BinaryOpVal, Shl, SHL); }
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lshr { RET_TOK(BinaryOpVal, LShr, LSHR); }
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ashr { RET_TOK(BinaryOpVal, AShr, ASHR); }
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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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icmp { RET_TOK(OtherOpVal, ICmp, ICMP); }
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fcmp { RET_TOK(OtherOpVal, FCmp, FCMP); }
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eq { return EQ; }
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ne { return NE; }
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slt { return SLT; }
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sgt { return SGT; }
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sle { return SLE; }
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sge { return SGE; }
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ult { return ULT; }
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ugt { return UGT; }
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ule { return ULE; }
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uge { return UGE; }
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oeq { return OEQ; }
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one { return ONE; }
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olt { return OLT; }
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ogt { return OGT; }
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ole { return OLE; }
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oge { return OGE; }
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ord { return ORD; }
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uno { return UNO; }
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ueq { return UEQ; }
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une { return UNE; }
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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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trunc { RET_TOK(CastOpVal, Trunc, TRUNC); }
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zext { RET_TOK(CastOpVal, ZExt, ZEXT); }
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sext { RET_TOK(CastOpVal, SExt, SEXT); }
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fptrunc { RET_TOK(CastOpVal, FPTrunc, FPTRUNC); }
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fpext { RET_TOK(CastOpVal, FPExt, FPEXT); }
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uitofp { RET_TOK(CastOpVal, UIToFP, UITOFP); }
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sitofp { RET_TOK(CastOpVal, SIToFP, SITOFP); }
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fptoui { RET_TOK(CastOpVal, FPToUI, FPTOUI); }
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fptosi { RET_TOK(CastOpVal, FPToSI, FPTOSI); }
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inttoptr { RET_TOK(CastOpVal, IntToPtr, INTTOPTR); }
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ptrtoint { RET_TOK(CastOpVal, PtrToInt, PTRTOINT); }
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bitcast { RET_TOK(CastOpVal, BitCast, BITCAST); }
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select { RET_TOK(OtherOpVal, Select, SELECT); }
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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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extractelement { RET_TOK(OtherOpVal, ExtractElement, EXTRACTELEMENT); }
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insertelement { RET_TOK(OtherOpVal, InsertElement, INSERTELEMENT); }
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shufflevector { RET_TOK(OtherOpVal, ShuffleVector, SHUFFLEVECTOR); }
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{LocalVarName} {
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UnEscapeLexed(yytext+1);
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llvmAsmlval.StrVal = strdup(yytext+1); // Skip %
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return LOCALVAR;
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}
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{GlobalVarName} {
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UnEscapeLexed(yytext+1);
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llvmAsmlval.StrVal = strdup(yytext+1); // Skip @
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return GLOBALVAR;
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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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{AtStringConstant} {
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yytext[strlen(yytext)-1] = 0; // nuke end quote
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llvmAsmlval.StrVal = strdup(yytext+2); // Nuke @, quote
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return ATSTRINGCONSTANT;
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}
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{PInteger} { int len = strlen(yytext);
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uint32_t numBits = ((len * 64) / 19) + 1;
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APInt Tmp(numBits, yytext, len, 10);
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uint32_t activeBits = Tmp.getActiveBits();
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if (activeBits > 0 && activeBits < numBits)
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Tmp.trunc(activeBits);
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if (Tmp.getBitWidth() > 64) {
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llvmAsmlval.APIntVal = new APInt(Tmp);
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return EUAPINTVAL;
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} else {
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llvmAsmlval.UInt64Val = Tmp.getZExtValue();
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return EUINT64VAL;
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}
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}
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{NInteger} { int len = strlen(yytext);
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uint32_t numBits = (((len-1) * 64) / 19) + 2;
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APInt Tmp(numBits, yytext, len, 10);
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uint32_t minBits = Tmp.getMinSignedBits();
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if (minBits > 0 && minBits < numBits)
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Tmp.trunc(minBits);
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if (Tmp.getBitWidth() > 64) {
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llvmAsmlval.APIntVal = new APInt(Tmp);
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return ESAPINTVAL;
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} else {
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llvmAsmlval.SInt64Val = Tmp.getSExtValue();
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return ESINT64VAL;
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}
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}
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{HexIntConstant} { int len = strlen(yytext+3) - 3;
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uint32_t bits = len * 4;
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APInt Tmp(bits, yytext+3, len, 16);
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uint32_t activeBits = Tmp.getActiveBits();
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if (activeBits > 0 && activeBits < bits)
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Tmp.trunc(activeBits);
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if (Tmp.getBitWidth() > 64) {
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llvmAsmlval.APIntVal = new APInt(Tmp);
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return yytext[0] == 's' ? ESAPINTVAL : EUAPINTVAL;
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} else if (yytext[0] == 's') {
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llvmAsmlval.SInt64Val = Tmp.getSExtValue();
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return ESINT64VAL;
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} else {
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llvmAsmlval.UInt64Val = Tmp.getZExtValue();
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return EUINT64VAL;
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}
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}
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{LocalVarID} {
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uint64_t Val = atoull(yytext+1);
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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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{GlobalVarID} {
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uint64_t Val = atoull(yytext+1);
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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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{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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