mirror of
https://github.com/c64scene-ar/llvm-6502.git
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fb4ab00d09
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26209 91177308-0d34-0410-b5e6-96231b3b80d8
186 lines
7.7 KiB
C++
186 lines
7.7 KiB
C++
//===-- StackerParser.y - Parser for Stacker programs -----------*- 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 bison parser for Stacker programs.
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//
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//===----------------------------------------------------------------------===//
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%{
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#include "StackerCompiler.h"
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#include "llvm/SymbolTable.h"
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#include "llvm/Module.h"
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#include "llvm/Instructions.h"
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#include "llvm/ADT/STLExtras.h"
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#include "llvm/ADT/DepthFirstIterator.h"
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#include <list>
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#include <utility>
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#include <algorithm>
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#define YYERROR_VERBOSE 1
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#define SCI StackerCompiler::TheInstance
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int yyerror(const char *ErrorMsg); // Forward declarations to prevent "implicit
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int yylex(); // declaration" of xxx warnings.
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int yyparse();
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%}
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%union
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{
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llvm::Module* ModuleVal;
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llvm::Function* FunctionVal;
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llvm::BasicBlock* BasicBlockVal;
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int64_t IntegerVal;
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char* StringVal;
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}
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/* Typed Productions */
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%type <ModuleVal> Module DefinitionList
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%type <FunctionVal> Definition ForwardDef ColonDef MainDef
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%type <FunctionVal> WordList
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%type <BasicBlockVal> Word
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/* Typed Tokens */
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%token <IntegerVal> INTEGER
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%token <StringVal> STRING IDENTIFIER
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/* Terminal Tokens */
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%token SEMI COLON FORWARD MAIN DUMP
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%token TRUETOK FALSETOK LESS MORE LESS_EQUAL MORE_EQUAL NOT_EQUAL EQUAL
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%token PLUS MINUS INCR DECR MULT DIV MODULUS NEGATE ABS MIN MAX STAR_SLASH
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%token AND OR XOR LSHIFT RSHIFT
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%token DROP DROP2 NIP NIP2 DUP DUP2 SWAP SWAP2 OVER OVER2 ROT ROT2
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%token RROT RROT2 TUCK TUCK2 ROLL PICK SELECT
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%token MALLOC FREE GET PUT
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%token IF ELSE ENDIF WHILE END RECURSE RETURN EXIT
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%token TAB SPACE CR IN_STR IN_NUM IN_CHAR OUT_STR OUT_NUM OUT_CHAR
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/* Start Token */
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%start Module
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%%
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/* A module is just a DefinitionList */
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Module : { SCI->handle_module_start( ); }
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DefinitionList { $$ = SCI->handle_module_end( $2 ); } ;
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/* A Definitionlist is just a sequence of definitions */
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DefinitionList : DefinitionList Definition { $$ = SCI->handle_definition_list_end( $1, $2 ); }
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| /* empty */ { $$ = SCI->handle_definition_list_start(); } ;
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/* A definition can be one of three flavors */
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Definition : ForwardDef { $$ = $1; }
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| ColonDef { $$ = $1; }
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| MainDef { $$ = $1; } ;
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/* Forward definitions just introduce a name */
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ForwardDef : FORWARD IDENTIFIER SEMI { $$ = SCI->handle_forward( $2 ); } ;
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/* The main definition has to generate additional code so we treat it specially */
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MainDef : COLON MAIN WordList SEMI { $$ = SCI->handle_main_definition($3); } ;
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/* Regular definitions have a name and a WordList */
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ColonDef : COLON IDENTIFIER WordList SEMI { $$ = SCI->handle_definition( $2, $3 ); } ;
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/* A WordList is just a sequence of words */
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WordList : WordList Word { $$ = SCI->handle_word_list_end( $1, $2 ); }
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| /* empty */ { $$ = SCI->handle_word_list_start(); } ;
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/* A few "words" have a funky syntax */
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/* FIXME: The body of compound words can currently only be function calls */
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/* This is not acceptable, it should be a WordList, but that produces a Function */
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/* Which is hard to merge into the function the compound statement is working on */
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Word : IF IDENTIFIER ELSE IDENTIFIER ENDIF { $$ = SCI->handle_if( $2, $4 ); }
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| IF IDENTIFIER ENDIF { $$ = SCI->handle_if( $2 ); }
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| WHILE IDENTIFIER END { $$ = SCI->handle_while( $2 ); } ;
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/* A few words are handled specially */
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Word : IDENTIFIER { $$ = SCI->handle_identifier( $1 ); } ;
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Word : STRING { $$ = SCI->handle_string( $1 ); } ;
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Word : INTEGER { $$ = SCI->handle_integer( $1 ); } ;
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/* Everything else is a terminal symbol and goes to handle_word */
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Word : TRUETOK { $$ = SCI->handle_word( TRUETOK ); } ;
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Word : FALSETOK { $$ = SCI->handle_word( FALSETOK ); } ;
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Word : LESS { $$ = SCI->handle_word( LESS ); } ;
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Word : MORE { $$ = SCI->handle_word( MORE ); } ;
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Word : LESS_EQUAL { $$ = SCI->handle_word( LESS_EQUAL ); } ;
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Word : MORE_EQUAL { $$ = SCI->handle_word( MORE_EQUAL ); } ;
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Word : NOT_EQUAL { $$ = SCI->handle_word( NOT_EQUAL ); } ;
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Word : EQUAL { $$ = SCI->handle_word( EQUAL ); } ;
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Word : PLUS { $$ = SCI->handle_word( PLUS ); } ;
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Word : MINUS { $$ = SCI->handle_word( MINUS ); } ;
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Word : INCR { $$ = SCI->handle_word( INCR ); } ;
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Word : DECR { $$ = SCI->handle_word( DECR ); } ;
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Word : MULT { $$ = SCI->handle_word( MULT ); } ;
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Word : DIV { $$ = SCI->handle_word( DIV ); } ;
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Word : MODULUS { $$ = SCI->handle_word( MODULUS ); } ;
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Word : NEGATE { $$ = SCI->handle_word( NEGATE ); } ;
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Word : ABS { $$ = SCI->handle_word( ABS ); } ;
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Word : MIN { $$ = SCI->handle_word( MIN ); } ;
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Word : MAX { $$ = SCI->handle_word( MAX ); } ;
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Word : STAR_SLASH { $$ = SCI->handle_word( STAR_SLASH ); } ;
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Word : AND { $$ = SCI->handle_word( AND ); } ;
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Word : OR { $$ = SCI->handle_word( OR ); } ;
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Word : XOR { $$ = SCI->handle_word( XOR ); } ;
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Word : LSHIFT { $$ = SCI->handle_word( LSHIFT ); } ;
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Word : RSHIFT { $$ = SCI->handle_word( RSHIFT ); } ;
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Word : DROP { $$ = SCI->handle_word( DROP ); } ;
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Word : DROP2 { $$ = SCI->handle_word( DROP2 ); } ;
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Word : NIP { $$ = SCI->handle_word( NIP ); } ;
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Word : NIP2 { $$ = SCI->handle_word( NIP2 ); } ;
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Word : DUP { $$ = SCI->handle_word( DUP ); } ;
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Word : DUP2 { $$ = SCI->handle_word( DUP2 ); } ;
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Word : SWAP { $$ = SCI->handle_word( SWAP ); } ;
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Word : SWAP2 { $$ = SCI->handle_word( SWAP2 ); } ;
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Word : OVER { $$ = SCI->handle_word( OVER ); } ;
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Word : OVER2 { $$ = SCI->handle_word( OVER2 ); } ;
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Word : ROT { $$ = SCI->handle_word( ROT ); } ;
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Word : ROT2 { $$ = SCI->handle_word( ROT2 ); } ;
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Word : RROT { $$ = SCI->handle_word( RROT ); } ;
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Word : RROT2 { $$ = SCI->handle_word( RROT2 ); } ;
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Word : TUCK { $$ = SCI->handle_word( TUCK ); } ;
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Word : TUCK2 { $$ = SCI->handle_word( TUCK2 ); } ;
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Word : ROLL { $$ = SCI->handle_word( ROLL ); } ;
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Word : PICK { $$ = SCI->handle_word( PICK ); } ;
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Word : SELECT { $$ = SCI->handle_word( SELECT ); } ;
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Word : MALLOC { $$ = SCI->handle_word( MALLOC ); } ;
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Word : FREE { $$ = SCI->handle_word( FREE ); } ;
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Word : GET { $$ = SCI->handle_word( GET ); } ;
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Word : PUT { $$ = SCI->handle_word( PUT ); } ;
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Word : RECURSE { $$ = SCI->handle_word( RECURSE ); } ;
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Word : RETURN { $$ = SCI->handle_word( RETURN ); } ;
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Word : EXIT { $$ = SCI->handle_word( EXIT ); } ;
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Word : TAB { $$ = SCI->handle_word( TAB ); };
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Word : SPACE { $$ = SCI->handle_word( SPACE ); } ;
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Word : CR { $$ = SCI->handle_word( CR ); } ;
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Word : IN_STR { $$ = SCI->handle_word( IN_STR ); } ;
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Word : IN_NUM { $$ = SCI->handle_word( IN_NUM ); } ;
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Word : IN_CHAR { $$ = SCI->handle_word( IN_CHAR ); } ;
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Word : OUT_STR { $$ = SCI->handle_word( OUT_STR ); } ;
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Word : OUT_NUM { $$ = SCI->handle_word( OUT_NUM ); } ;
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Word : OUT_CHAR { $$ = SCI->handle_word( OUT_CHAR ); } ;
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Word : DUMP { $$ = SCI->handle_word( DUMP ); } ;
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%%
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/* Handle messages a little more nicely than the default yyerror */
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int yyerror(const char *ErrorMsg) {
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std::string where
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= std::string((SCI->filename() == "-") ? std::string("<stdin>") : SCI->filename())
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+ ":" + utostr((unsigned) Stackerlineno ) + ": ";
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std::string errMsg = std::string(ErrorMsg) + "\n" + where + " while reading ";
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if (yychar == YYEMPTY)
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errMsg += "end-of-file.";
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else
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errMsg += "token: '" + std::string(Stackertext, Stackerleng) + "'";
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StackerCompiler::ThrowException(errMsg);
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return 0;
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}
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