Initial stacker checkin
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10178 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/projects/Stacker/lib/compiler/StackerParser.y b/projects/Stacker/lib/compiler/StackerParser.y
new file mode 100644
index 0000000..3c82a86
--- /dev/null
+++ b/projects/Stacker/lib/compiler/StackerParser.y
@@ -0,0 +1,190 @@
+//===-- llvmAsmParser.y - Parser for llvm assembly files --------*- C++ -*-===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file was developed by the LLVM research group and is distributed under
+// the University of Illinois Open Source License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file implements the bison parser for LLVM assembly languages files.
+//
+//===----------------------------------------------------------------------===//
+
+%debug
+
+%{
+#include "StackerCompiler.h"
+#include "llvm/SymbolTable.h"
+#include "llvm/Module.h"
+#include "llvm/iTerminators.h"
+#include "llvm/iMemory.h"
+#include "llvm/iOperators.h"
+#include "llvm/iPHINode.h"
+#include "Support/STLExtras.h"
+#include "Support/DepthFirstIterator.h"
+#include <list>
+#include <utility>
+#include <algorithm>
+
+#define YYERROR_VERBOSE 1
+#define SCI StackerCompiler::TheInstance
+
+int yyerror(const char *ErrorMsg); // Forward declarations to prevent "implicit
+int yylex(); // declaration" of xxx warnings.
+int yyparse();
+
+%}
+
+%union
+{
+ llvm::Module* ModuleVal;
+ llvm::Function* FunctionVal;
+ llvm::BasicBlock* BasicBlockVal;
+ uint32_t IntegerVal;
+ char* StringVal;
+}
+
+/* Typed Productions */
+%type <ModuleVal> Module DefinitionList
+%type <FunctionVal> Definition ForwardDef ColonDef MainDef
+%type <FunctionVal> WordList
+%type <BasicBlockVal> Word
+
+/* Typed Tokens */
+%token <IntegerVal> INTEGER
+%token <StringVal> STRING IDENTIFIER
+
+/* Terminal Tokens */
+%token SEMI COLON FORWARD MAIN DUMP
+%token TRUE FALSE LESS MORE LESS_EQUAL MORE_EQUAL NOT_EQUAL EQUAL
+%token PLUS MINUS INCR DECR MULT DIV MODULUS NEGATE ABS MIN MAX STAR_SLASH
+%token AND OR XOR LSHIFT RSHIFT
+%token DROP DROP2 NIP NIP2 DUP DUP2 SWAP SWAP2 OVER OVER2 ROT ROT2
+%token RROT RROT2 TUCK TUCK2 ROLL PICK SELECT
+%token MALLOC FREE GET PUT
+%token IF ELSE ENDIF WHILE END RECURSE RETURN EXIT
+%token TAB SPACE CR IN_STR IN_NUM IN_CHAR OUT_STR OUT_NUM OUT_CHAR
+
+/* Start Token */
+%start Module
+
+%%
+
+/* A module is just a DefinitionList */
+Module : { SCI->handle_module_start( ); }
+ DefinitionList { $$ = SCI->handle_module_end( $2 ); } ;
+
+/* A Definitionlist is just a sequence of definitions */
+DefinitionList : DefinitionList Definition { $$ = SCI->handle_definition_list_end( $1, $2 ); }
+ | /* empty */ { $$ = SCI->handle_definition_list_start(); } ;
+
+/* A definition can be one of three flavors */
+Definition : ForwardDef { $$ = $1; }
+ | ColonDef { $$ = $1; }
+ | MainDef { $$ = $1; } ;
+
+/* Forward definitions just introduce a name */
+ForwardDef : FORWARD IDENTIFIER SEMI { $$ = SCI->handle_forward( $2 ); } ;
+
+/* The main definition has to generate additional code so we treat it specially */
+MainDef : COLON MAIN WordList SEMI { $$ = SCI->handle_main_definition($3); } ;
+
+/* Regular definitions have a name and a WordList */
+ColonDef : COLON IDENTIFIER WordList SEMI { $$ = SCI->handle_definition( $2, $3 ); } ;
+
+/* A WordList is just a sequence of words */
+WordList : WordList Word { $$ = SCI->handle_word_list_end( $1, $2 ); }
+ | /* empty */ { $$ = SCI->handle_word_list_start() } ;
+
+/* A few "words" have a funky syntax */
+/* FIXME: The body of compound words can currently only be function calls */
+/* This is not acceptable, it should be a WordList, but that produces a Function */
+/* Which is hard to merge into the function the compound statement is working on */
+Word : IF IDENTIFIER ELSE IDENTIFIER ENDIF { $$ = SCI->handle_if( $2, $4 ); }
+ | IF IDENTIFIER ENDIF { $$ = SCI->handle_if( $2 ); }
+ | WHILE IDENTIFIER END { $$ = SCI->handle_while( $2 ); } ;
+
+/* A few words are handled specially */
+Word : IDENTIFIER { $$ = SCI->handle_identifier( $1 ); } ;
+Word : STRING { $$ = SCI->handle_string( $1 ); } ;
+Word : INTEGER { $$ = SCI->handle_integer( $1 ); } ;
+
+/* Everything else is a terminal symbol and goes to handle_word */
+Word : TRUE { $$ = SCI->handle_word( TRUE ); } ;
+Word : FALSE { $$ = SCI->handle_word( FALSE ); } ;
+Word : LESS { $$ = SCI->handle_word( LESS ); } ;
+Word : MORE { $$ = SCI->handle_word( MORE ); } ;
+Word : LESS_EQUAL { $$ = SCI->handle_word( LESS_EQUAL ); } ;
+Word : MORE_EQUAL { $$ = SCI->handle_word( MORE_EQUAL ); } ;
+Word : NOT_EQUAL { $$ = SCI->handle_word( NOT_EQUAL ); } ;
+Word : EQUAL { $$ = SCI->handle_word( EQUAL ); } ;
+Word : PLUS { $$ = SCI->handle_word( PLUS ); } ;
+Word : MINUS { $$ = SCI->handle_word( MINUS ); } ;
+Word : INCR { $$ = SCI->handle_word( INCR ); } ;
+Word : DECR { $$ = SCI->handle_word( DECR ); } ;
+Word : MULT { $$ = SCI->handle_word( MULT ); } ;
+Word : DIV { $$ = SCI->handle_word( DIV ); } ;
+Word : MODULUS { $$ = SCI->handle_word( MODULUS ); } ;
+Word : NEGATE { $$ = SCI->handle_word( NEGATE ); } ;
+Word : ABS { $$ = SCI->handle_word( ABS ); } ;
+Word : MIN { $$ = SCI->handle_word( MIN ); } ;
+Word : MAX { $$ = SCI->handle_word( MAX ); } ;
+Word : STAR_SLASH { $$ = SCI->handle_word( STAR_SLASH ); } ;
+Word : AND { $$ = SCI->handle_word( AND ); } ;
+Word : OR { $$ = SCI->handle_word( OR ); } ;
+Word : XOR { $$ = SCI->handle_word( XOR ); } ;
+Word : LSHIFT { $$ = SCI->handle_word( LSHIFT ); } ;
+Word : RSHIFT { $$ = SCI->handle_word( RSHIFT ); } ;
+Word : DROP { $$ = SCI->handle_word( DROP ); } ;
+Word : DROP2 { $$ = SCI->handle_word( DROP2 ); } ;
+Word : NIP { $$ = SCI->handle_word( NIP ); } ;
+Word : NIP2 { $$ = SCI->handle_word( NIP2 ); } ;
+Word : DUP { $$ = SCI->handle_word( DUP ); } ;
+Word : DUP2 { $$ = SCI->handle_word( DUP2 ); } ;
+Word : SWAP { $$ = SCI->handle_word( SWAP ); } ;
+Word : SWAP2 { $$ = SCI->handle_word( SWAP2 ); } ;
+Word : OVER { $$ = SCI->handle_word( OVER ); } ;
+Word : OVER2 { $$ = SCI->handle_word( OVER2 ); } ;
+Word : ROT { $$ = SCI->handle_word( ROT ); } ;
+Word : ROT2 { $$ = SCI->handle_word( ROT2 ); } ;
+Word : RROT { $$ = SCI->handle_word( RROT ); } ;
+Word : RROT2 { $$ = SCI->handle_word( RROT2 ); } ;
+Word : TUCK { $$ = SCI->handle_word( TUCK ); } ;
+Word : TUCK2 { $$ = SCI->handle_word( TUCK2 ); } ;
+Word : ROLL { $$ = SCI->handle_word( ROLL ); } ;
+Word : PICK { $$ = SCI->handle_word( PICK ); } ;
+Word : SELECT { $$ = SCI->handle_word( SELECT ); } ;
+Word : MALLOC { $$ = SCI->handle_word( MALLOC ); } ;
+Word : FREE { $$ = SCI->handle_word( FREE ); } ;
+Word : GET { $$ = SCI->handle_word( GET ); } ;
+Word : PUT { $$ = SCI->handle_word( PUT ); } ;
+Word : RECURSE { $$ = SCI->handle_word( RECURSE ); } ;
+Word : RETURN { $$ = SCI->handle_word( RETURN ); } ;
+Word : EXIT { $$ = SCI->handle_word( EXIT ); } ;
+Word : TAB { $$ = SCI->handle_word( TAB ); };
+Word : SPACE { $$ = SCI->handle_word( SPACE ); } ;
+Word : CR { $$ = SCI->handle_word( CR ); } ;
+Word : IN_STR { $$ = SCI->handle_word( IN_STR ); } ;
+Word : IN_NUM { $$ = SCI->handle_word( IN_NUM ); } ;
+Word : IN_CHAR { $$ = SCI->handle_word( IN_CHAR ); } ;
+Word : OUT_STR { $$ = SCI->handle_word( OUT_STR ); } ;
+Word : OUT_NUM { $$ = SCI->handle_word( OUT_NUM ); } ;
+Word : OUT_CHAR { $$ = SCI->handle_word( OUT_CHAR ); } ;
+Word : DUMP { $$ = SCI->handle_word( DUMP ); } ;
+
+%%
+
+/* Handle messages a little more nicely than the default yyerror */
+int yyerror(const char *ErrorMsg) {
+ std::string where
+ = std::string((SCI->filename() == "-") ? std::string("<stdin>") : SCI->filename())
+ + ":" + utostr((unsigned) Stackerlineno ) + ": ";
+ std::string errMsg = std::string(ErrorMsg) + "\n" + where + " while reading ";
+ if (yychar == YYEMPTY)
+ errMsg += "end-of-file.";
+ else
+ errMsg += "token: '" + std::string(Stackertext, Stackerleng) + "'";
+ StackerCompiler::ThrowException(errMsg);
+ return 0;
+}