mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-10-31 09:11:13 +00:00
df7306f1b9
* Allow multiple definitions of a type with the same name as long as they are the same type * Eagerly resolve types to allow #2 to work instead of after the whole const pool has been processed * Change grammar to require a const before a local constant definition git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@699 91177308-0d34-0410-b5e6-96231b3b80d8
240 lines
7.9 KiB
C++
240 lines
7.9 KiB
C++
/*===-- Lexer.l - Scanner for llvm assembly files ----------------*- C++ -*--=//
|
|
//
|
|
// This file implements the flex scanner for LLVM assembly languages files.
|
|
//
|
|
//===------------------------------------------------------------------------=*/
|
|
|
|
%option prefix="llvmAsm"
|
|
%option yylineno
|
|
%option nostdinit
|
|
%option never-interactive
|
|
%option batch
|
|
%option noyywrap
|
|
%option nodefault
|
|
%option 8bit
|
|
%option outfile="Lexer.cpp"
|
|
%option ecs
|
|
%option noreject
|
|
%option noyymore
|
|
|
|
%{
|
|
#include "ParserInternals.h"
|
|
#include "llvm/BasicBlock.h"
|
|
#include "llvm/Method.h"
|
|
#include "llvm/Module.h"
|
|
#include <list>
|
|
#include "llvmAsmParser.h"
|
|
#include <ctype.h>
|
|
#include <stdlib.h>
|
|
|
|
#define RET_TOK(type, Enum, sym) \
|
|
llvmAsmlval.type = Instruction::Enum; return sym
|
|
|
|
|
|
// TODO: All of the static identifiers are figured out by the lexer,
|
|
// these should be hashed to reduce the lexer size
|
|
|
|
|
|
// atoull - Convert an ascii string of decimal digits into the unsigned long
|
|
// long representation... this does not have to do input error checking,
|
|
// because we know that the input will be matched by a suitable regex...
|
|
//
|
|
uint64_t atoull(const char *Buffer) {
|
|
uint64_t Result = 0;
|
|
for (; *Buffer; Buffer++) {
|
|
uint64_t OldRes = Result;
|
|
Result *= 10;
|
|
Result += *Buffer-'0';
|
|
if (Result < OldRes) { // Uh, oh, overflow detected!!!
|
|
ThrowException("constant bigger than 64 bits detected!");
|
|
}
|
|
}
|
|
return Result;
|
|
}
|
|
|
|
|
|
// UnEscapeLexed - Run through the specified buffer and change \xx codes to the
|
|
// appropriate character. If AllowNull is set to false, a \00 value will cause
|
|
// an exception to be thrown.
|
|
//
|
|
// If AllowNull is set to true, the return value of the function points to the
|
|
// last character of the string in memory.
|
|
//
|
|
char *UnEscapeLexed(char *Buffer, bool AllowNull = false) {
|
|
char *BOut = Buffer;
|
|
for (char *BIn = Buffer; *BIn; ) {
|
|
if (BIn[0] == '\\' && isxdigit(BIn[1]) && isxdigit(BIn[2])) {
|
|
char Tmp = BIn[3]; BIn[3] = 0; // Terminate string
|
|
*BOut = strtol(BIn+1, 0, 16); // Convert to number
|
|
if (!AllowNull && !*BOut)
|
|
ThrowException("String literal cannot accept \\00 escape!");
|
|
|
|
BIn[3] = Tmp; // Restore character
|
|
BIn += 3; // Skip over handled chars
|
|
++BOut;
|
|
} else {
|
|
*BOut++ = *BIn++;
|
|
}
|
|
}
|
|
|
|
return BOut;
|
|
}
|
|
|
|
#define YY_NEVER_INTERACTIVE 1
|
|
%}
|
|
|
|
|
|
|
|
/* Comments start with a ; and go till end of line */
|
|
Comment ;.*
|
|
|
|
/* Variable(Value) identifiers start with a % sign */
|
|
VarID %[a-zA-Z$._][a-zA-Z$._0-9]*
|
|
|
|
/* Label identifiers end with a colon */
|
|
Label [a-zA-Z$._0-9]+:
|
|
|
|
/* Quoted names can contain any character except " and \ */
|
|
StringConstant \"[^\"]+\"
|
|
|
|
|
|
/* [PN]Integer: match positive and negative literal integer values that
|
|
* are preceeded by a '%' character. These represent unnamed variable slots.
|
|
*/
|
|
EPInteger %[0-9]+
|
|
ENInteger %-[0-9]+
|
|
|
|
|
|
/* E[PN]Integer: match positive and negative literal integer values */
|
|
PInteger [0-9]+
|
|
NInteger -[0-9]+
|
|
|
|
/* FPConstant - A Floating point constant.
|
|
TODO: Expand lexer to support 10e50 FP constant notation */
|
|
FPConstant [0-9]+[.][0-9]*
|
|
|
|
%%
|
|
|
|
{Comment} { /* Ignore comments for now */ }
|
|
|
|
begin { return BEGINTOK; }
|
|
end { return END; }
|
|
true { return TRUE; }
|
|
false { return FALSE; }
|
|
declare { return DECLARE; }
|
|
global { return GLOBAL; }
|
|
constant { return CONSTANT; }
|
|
const { return CONST; }
|
|
uninitialized { return UNINIT; }
|
|
implementation { return IMPLEMENTATION; }
|
|
\.\.\. { return DOTDOTDOT; }
|
|
string { return STRING; }
|
|
null { return NULL_TOK; }
|
|
|
|
void { llvmAsmlval.PrimType = Type::VoidTy ; return VOID; }
|
|
bool { llvmAsmlval.PrimType = Type::BoolTy ; return BOOL; }
|
|
sbyte { llvmAsmlval.PrimType = Type::SByteTy ; return SBYTE; }
|
|
ubyte { llvmAsmlval.PrimType = Type::UByteTy ; return UBYTE; }
|
|
short { llvmAsmlval.PrimType = Type::ShortTy ; return SHORT; }
|
|
ushort { llvmAsmlval.PrimType = Type::UShortTy; return USHORT; }
|
|
int { llvmAsmlval.PrimType = Type::IntTy ; return INT; }
|
|
uint { llvmAsmlval.PrimType = Type::UIntTy ; return UINT; }
|
|
long { llvmAsmlval.PrimType = Type::LongTy ; return LONG; }
|
|
ulong { llvmAsmlval.PrimType = Type::ULongTy ; return ULONG; }
|
|
float { llvmAsmlval.PrimType = Type::FloatTy ; return FLOAT; }
|
|
double { llvmAsmlval.PrimType = Type::DoubleTy; return DOUBLE; }
|
|
|
|
type { llvmAsmlval.PrimType = Type::TypeTy ; return TYPE; }
|
|
|
|
label { llvmAsmlval.PrimType = Type::LabelTy ; return LABEL; }
|
|
opaque { llvmAsmlval.TypeVal =
|
|
new PATypeHolder<Type>(OpaqueType::get());
|
|
return OPAQUE;
|
|
}
|
|
|
|
|
|
not { RET_TOK(UnaryOpVal, Not, NOT); }
|
|
|
|
add { RET_TOK(BinaryOpVal, Add, ADD); }
|
|
sub { RET_TOK(BinaryOpVal, Sub, SUB); }
|
|
mul { RET_TOK(BinaryOpVal, Mul, MUL); }
|
|
div { RET_TOK(BinaryOpVal, Div, DIV); }
|
|
rem { RET_TOK(BinaryOpVal, Rem, REM); }
|
|
setne { RET_TOK(BinaryOpVal, SetNE, SETNE); }
|
|
seteq { RET_TOK(BinaryOpVal, SetEQ, SETEQ); }
|
|
setlt { RET_TOK(BinaryOpVal, SetLT, SETLT); }
|
|
setgt { RET_TOK(BinaryOpVal, SetGT, SETGT); }
|
|
setle { RET_TOK(BinaryOpVal, SetLE, SETLE); }
|
|
setge { RET_TOK(BinaryOpVal, SetGE, SETGE); }
|
|
|
|
to { return TO; }
|
|
phi { RET_TOK(OtherOpVal, PHINode, PHI); }
|
|
call { RET_TOK(OtherOpVal, Call, CALL); }
|
|
cast { RET_TOK(OtherOpVal, Cast, CAST); }
|
|
shl { RET_TOK(OtherOpVal, Shl, SHL); }
|
|
shr { RET_TOK(OtherOpVal, Shr, SHR); }
|
|
|
|
ret { RET_TOK(TermOpVal, Ret, RET); }
|
|
br { RET_TOK(TermOpVal, Br, BR); }
|
|
switch { RET_TOK(TermOpVal, Switch, SWITCH); }
|
|
|
|
|
|
malloc { RET_TOK(MemOpVal, Malloc, MALLOC); }
|
|
alloca { RET_TOK(MemOpVal, Alloca, ALLOCA); }
|
|
free { RET_TOK(MemOpVal, Free, FREE); }
|
|
load { RET_TOK(MemOpVal, Load, LOAD); }
|
|
store { RET_TOK(MemOpVal, Store, STORE); }
|
|
getelementptr { RET_TOK(MemOpVal, GetElementPtr, GETELEMENTPTR); }
|
|
|
|
|
|
{VarID} {
|
|
UnEscapeLexed(yytext+1);
|
|
llvmAsmlval.StrVal = strdup(yytext+1); // Skip %
|
|
return VAR_ID;
|
|
}
|
|
{Label} {
|
|
yytext[strlen(yytext)-1] = 0; // nuke colon
|
|
UnEscapeLexed(yytext);
|
|
llvmAsmlval.StrVal = strdup(yytext);
|
|
return LABELSTR;
|
|
}
|
|
|
|
{StringConstant} { // Note that we cannot unescape a string constant here! The
|
|
// string constant might contain a \00 which would not be
|
|
// understood by the string stuff. It is valid to make a
|
|
// [sbyte] c"Hello World\00" constant, for example.
|
|
//
|
|
yytext[strlen(yytext)-1] = 0; // nuke end quote
|
|
llvmAsmlval.StrVal = strdup(yytext+1); // Nuke start quote
|
|
return STRINGCONSTANT;
|
|
}
|
|
|
|
|
|
{PInteger} { llvmAsmlval.UInt64Val = atoull(yytext); return EUINT64VAL; }
|
|
{NInteger} {
|
|
uint64_t Val = atoull(yytext+1);
|
|
// +1: we have bigger negative range
|
|
if (Val > (uint64_t)INT64_MAX+1)
|
|
ThrowException("Constant too large for signed 64 bits!");
|
|
llvmAsmlval.SInt64Val = -Val;
|
|
return ESINT64VAL;
|
|
}
|
|
|
|
|
|
{EPInteger} { llvmAsmlval.UIntVal = atoull(yytext+1); return UINTVAL; }
|
|
{ENInteger} {
|
|
uint64_t Val = atoull(yytext+2);
|
|
// +1: we have bigger negative range
|
|
if (Val > (uint64_t)INT32_MAX+1)
|
|
ThrowException("Constant too large for signed 32 bits!");
|
|
llvmAsmlval.SIntVal = -Val;
|
|
return SINTVAL;
|
|
}
|
|
|
|
{FPConstant} { llvmAsmlval.FPVal = atof(yytext); return FPVAL; }
|
|
|
|
[ \t\n] { /* Ignore whitespace */ }
|
|
. { return yytext[0]; }
|
|
|
|
%%
|