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SqMod/external/Squirrel/sqfuncstate.cpp
Sandu Liviu Catalin 81e96c2c81 Backport some squirrel changes.
2019-08-17 15:44:57 +03:00

650 lines
19 KiB
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/*
see copyright notice in squirrel.h
*/
#include "sqpcheader.h"
#ifndef NO_COMPILER
#include "sqcompiler.h"
#include "sqstring.h"
#include "sqfuncproto.h"
#include "sqtable.h"
#include "sqopcodes.h"
#include "sqfuncstate.h"
#ifdef _DEBUG_DUMP
SQInstructionDesc g_InstrDesc[]={
{_SC("_OP_LINE")},
{_SC("_OP_LOAD")},
{_SC("_OP_LOADINT")},
{_SC("_OP_LOADFLOAT")},
{_SC("_OP_DLOAD")},
{_SC("_OP_TAILCALL")},
{_SC("_OP_CALL")},
{_SC("_OP_PREPCALL")},
{_SC("_OP_PREPCALLK")},
{_SC("_OP_GETK")},
{_SC("_OP_MOVE")},
{_SC("_OP_NEWSLOT")},
{_SC("_OP_DELETE")},
{_SC("_OP_SET")},
{_SC("_OP_GET")},
{_SC("_OP_EQ")},
{_SC("_OP_NE")},
{_SC("_OP_ADD")},
{_SC("_OP_SUB")},
{_SC("_OP_MUL")},
{_SC("_OP_DIV")},
{_SC("_OP_MOD")},
{_SC("_OP_BITW")},
{_SC("_OP_RETURN")},
{_SC("_OP_LOADNULLS")},
{_SC("_OP_LOADROOT")},
{_SC("_OP_LOADBOOL")},
{_SC("_OP_DMOVE")},
{_SC("_OP_JMP")},
{_SC("_OP_JCMP")},
{_SC("_OP_JZ")},
{_SC("_OP_SETOUTER")},
{_SC("_OP_GETOUTER")},
{_SC("_OP_NEWOBJ")},
{_SC("_OP_APPENDARRAY")},
{_SC("_OP_COMPARITH")},
{_SC("_OP_INC")},
{_SC("_OP_INCL")},
{_SC("_OP_PINC")},
{_SC("_OP_PINCL")},
{_SC("_OP_CMP")},
{_SC("_OP_EXISTS")},
{_SC("_OP_INSTANCEOF")},
{_SC("_OP_AND")},
{_SC("_OP_OR")},
{_SC("_OP_NEG")},
{_SC("_OP_NOT")},
{_SC("_OP_BWNOT")},
{_SC("_OP_CLOSURE")},
{_SC("_OP_YIELD")},
{_SC("_OP_RESUME")},
{_SC("_OP_FOREACH")},
{_SC("_OP_POSTFOREACH")},
{_SC("_OP_CLONE")},
{_SC("_OP_TYPEOF")},
{_SC("_OP_PUSHTRAP")},
{_SC("_OP_POPTRAP")},
{_SC("_OP_THROW")},
{_SC("_OP_NEWSLOTA")},
{_SC("_OP_GETBASE")},
{_SC("_OP_CLOSE")},
};
#endif
void DumpLiteral(SQObjectPtr &o)
{
switch(sq_type(o)){
case OT_STRING: scprintf(_SC("\"%s\""),_stringval(o));break;
case OT_FLOAT: scprintf(_SC("{%f}"),_float(o));break;
case OT_INTEGER: scprintf(_SC("{") _PRINT_INT_FMT _SC("}"),_integer(o));break;
case OT_BOOL: scprintf(_SC("%s"),_integer(o)?_SC("true"):_SC("false"));break;
default: scprintf(_SC("(%s %p)"),GetTypeName(o),(void*)_rawval(o));break; break; //shut up compiler
}
}
SQFuncState::SQFuncState(SQSharedState *ss,SQFuncState *parent,CompilerErrorFunc efunc,void *ed)
{
_nliterals = 0;
_literals = SQTable::Create(ss,0);
_strings = SQTable::Create(ss,0);
_sharedstate = ss;
_lastline = 0;
_optimization = true;
_parent = parent;
_stacksize = 0;
_traps = 0;
_returnexp = 0;
_varparams = false;
_errfunc = efunc;
_errtarget = ed;
_bgenerator = false;
_outers = 0;
_ss = ss;
}
void SQFuncState::Error(const SQChar *err)
{
_errfunc(_errtarget,err);
}
#ifdef _DEBUG_DUMP
void SQFuncState::Dump(SQFunctionProto *func)
{
SQUnsignedInteger n=0,i;
SQInteger si;
scprintf(_SC("SQInstruction sizeof %d\n"),(SQInt32)sizeof(SQInstruction));
scprintf(_SC("SQObject sizeof %d\n"), (SQInt32)sizeof(SQObject));
scprintf(_SC("--------------------------------------------------------------------\n"));
scprintf(_SC("*****FUNCTION [%s]\n"),sq_type(func->_name)==OT_STRING?_stringval(func->_name):_SC("unknown"));
scprintf(_SC("-----LITERALS\n"));
SQObjectPtr refidx,key,val;
SQInteger idx;
SQObjectPtrVec templiterals;
templiterals.resize(_nliterals);
while((idx=_table(_literals)->Next(false,refidx,key,val))!=-1) {
refidx=idx;
templiterals[_integer(val)]=key;
}
for(i=0;i<templiterals.size();i++){
scprintf(_SC("[%d] "), (SQInt32)n);
DumpLiteral(templiterals[i]);
scprintf(_SC("\n"));
n++;
}
scprintf(_SC("-----PARAMS\n"));
if(_varparams)
scprintf(_SC("<<VARPARAMS>>\n"));
n=0;
for(i=0;i<_parameters.size();i++){
scprintf(_SC("[%d] "), (SQInt32)n);
DumpLiteral(_parameters[i]);
scprintf(_SC("\n"));
n++;
}
scprintf(_SC("-----LOCALS\n"));
for(si=0;si<func->_nlocalvarinfos;si++){
SQLocalVarInfo lvi=func->_localvarinfos[si];
scprintf(_SC("[%d] %s \t%d %d\n"), (SQInt32)lvi._pos,_stringval(lvi._name), (SQInt32)lvi._start_op, (SQInt32)lvi._end_op);
n++;
}
scprintf(_SC("-----LINE INFO\n"));
for(i=0;i<_lineinfos.size();i++){
SQLineInfo li=_lineinfos[i];
scprintf(_SC("op [%d] line [%d] \n"), (SQInt32)li._op, (SQInt32)li._line);
n++;
}
scprintf(_SC("-----dump\n"));
n=0;
for(i=0;i<_instructions.size();i++){
SQInstruction &inst=_instructions[i];
if(inst.op==_OP_LOAD || inst.op==_OP_DLOAD || inst.op==_OP_PREPCALLK || inst.op==_OP_GETK ){
SQInteger lidx = inst._arg1;
scprintf(_SC("[%03d] %15s %d "), (SQInt32)n,g_InstrDesc[inst.op].name,inst._arg0);
if(lidx >= 0xFFFFFFFF)
scprintf(_SC("null"));
else {
SQInteger refidx;
SQObjectPtr val,key,refo;
while(((refidx=_table(_literals)->Next(false,refo,key,val))!= -1) && (_integer(val) != lidx)) {
refo = refidx;
}
DumpLiteral(key);
}
if(inst.op != _OP_DLOAD) {
scprintf(_SC(" %d %d \n"),inst._arg2,inst._arg3);
}
else {
scprintf(_SC(" %d "),inst._arg2);
lidx = inst._arg3;
if(lidx >= 0xFFFFFFFF)
scprintf(_SC("null"));
else {
SQInteger refidx;
SQObjectPtr val,key,refo;
while(((refidx=_table(_literals)->Next(false,refo,key,val))!= -1) && (_integer(val) != lidx)) {
refo = refidx;
}
DumpLiteral(key);
scprintf(_SC("\n"));
}
}
}
else if(inst.op==_OP_LOADFLOAT) {
scprintf(_SC("[%03d] %15s %d %f %d %d\n"), (SQInt32)n,g_InstrDesc[inst.op].name,inst._arg0,*((SQFloat*)&inst._arg1),inst._arg2,inst._arg3);
}
/* else if(inst.op==_OP_ARITH){
scprintf(_SC("[%03d] %15s %d %d %d %c\n"),n,g_InstrDesc[inst.op].name,inst._arg0,inst._arg1,inst._arg2,inst._arg3);
}*/
else {
scprintf(_SC("[%03d] %15s %d %d %d %d\n"), (SQInt32)n,g_InstrDesc[inst.op].name,inst._arg0,inst._arg1,inst._arg2,inst._arg3);
}
n++;
}
scprintf(_SC("-----\n"));
scprintf(_SC("stack size[%d]\n"), (SQInt32)func->_stacksize);
scprintf(_SC("--------------------------------------------------------------------\n\n"));
}
#endif
SQInteger SQFuncState::GetNumericConstant(const SQInteger cons)
{
return GetConstant(SQObjectPtr(cons));
}
SQInteger SQFuncState::GetNumericConstant(const SQFloat cons)
{
return GetConstant(SQObjectPtr(cons));
}
SQInteger SQFuncState::GetConstant(const SQObject &cons)
{
SQObjectPtr val;
if(!_table(_literals)->Get(cons,val))
{
val = _nliterals;
_table(_literals)->NewSlot(cons,val);
_nliterals++;
if(_nliterals > MAX_LITERALS) {
val.Null();
Error(_SC("internal compiler error: too many literals"));
}
}
return _integer(val);
}
void SQFuncState::SetInstructionParams(SQInteger pos,SQInteger arg0,SQInteger arg1,SQInteger arg2,SQInteger arg3)
{
_instructions[pos]._arg0=(unsigned char)*((SQUnsignedInteger *)&arg0);
_instructions[pos]._arg1=(SQInt32)*((SQUnsignedInteger *)&arg1);
_instructions[pos]._arg2=(unsigned char)*((SQUnsignedInteger *)&arg2);
_instructions[pos]._arg3=(unsigned char)*((SQUnsignedInteger *)&arg3);
}
void SQFuncState::SetInstructionParam(SQInteger pos,SQInteger arg,SQInteger val)
{
switch(arg){
case 0:_instructions[pos]._arg0=(unsigned char)*((SQUnsignedInteger *)&val);break;
case 1:case 4:_instructions[pos]._arg1=(SQInt32)*((SQUnsignedInteger *)&val);break;
case 2:_instructions[pos]._arg2=(unsigned char)*((SQUnsignedInteger *)&val);break;
case 3:_instructions[pos]._arg3=(unsigned char)*((SQUnsignedInteger *)&val);break;
};
}
SQInteger SQFuncState::AllocStackPos()
{
SQInteger npos=_vlocals.size();
_vlocals.push_back(SQLocalVarInfo());
if(_vlocals.size()>((SQUnsignedInteger)_stacksize)) {
if(_stacksize>MAX_FUNC_STACKSIZE) Error(_SC("internal compiler error: too many locals"));
_stacksize=_vlocals.size();
}
return npos;
}
SQInteger SQFuncState::PushTarget(SQInteger n)
{
if(n!=-1){
_targetstack.push_back(n);
return n;
}
n=AllocStackPos();
_targetstack.push_back(n);
return n;
}
SQInteger SQFuncState::GetUpTarget(SQInteger n){
return _targetstack[((_targetstack.size()-1)-n)];
}
SQInteger SQFuncState::TopTarget(){
return _targetstack.back();
}
SQInteger SQFuncState::PopTarget()
{
SQUnsignedInteger npos=_targetstack.back();
assert(npos < _vlocals.size());
SQLocalVarInfo &t = _vlocals[npos];
if(sq_type(t._name)==OT_NULL){
_vlocals.pop_back();
}
_targetstack.pop_back();
return npos;
}
SQInteger SQFuncState::GetStackSize()
{
return _vlocals.size();
}
SQInteger SQFuncState::CountOuters(SQInteger stacksize)
{
SQInteger outers = 0;
SQInteger k = _vlocals.size() - 1;
while(k >= stacksize) {
SQLocalVarInfo &lvi = _vlocals[k];
k--;
if(lvi._end_op == UINT_MINUS_ONE) { //this means is an outer
outers++;
}
}
return outers;
}
void SQFuncState::SetStackSize(SQInteger n)
{
SQInteger size=_vlocals.size();
while(size>n){
size--;
SQLocalVarInfo lvi = _vlocals.back();
if(sq_type(lvi._name)!=OT_NULL){
if(lvi._end_op == UINT_MINUS_ONE) { //this means is an outer
_outers--;
}
lvi._end_op = GetCurrentPos();
_localvarinfos.push_back(lvi);
}
_vlocals.pop_back();
}
}
bool SQFuncState::IsConstant(const SQObject &name,SQObject &e)
{
SQObjectPtr val;
if(_table(_sharedstate->_consts)->Get(name,val)) {
e = val;
return true;
}
return false;
}
bool SQFuncState::IsLocal(SQUnsignedInteger stkpos)
{
if(stkpos>=_vlocals.size())return false;
else if(sq_type(_vlocals[stkpos]._name)!=OT_NULL)return true;
return false;
}
SQInteger SQFuncState::PushLocalVariable(const SQObject &name)
{
SQInteger pos=_vlocals.size();
SQLocalVarInfo lvi;
lvi._name=name;
lvi._start_op=GetCurrentPos()+1;
lvi._pos=_vlocals.size();
_vlocals.push_back(lvi);
if(_vlocals.size()>((SQUnsignedInteger)_stacksize))_stacksize=_vlocals.size();
return pos;
}
SQInteger SQFuncState::GetLocalVariable(const SQObject &name)
{
SQInteger locals=_vlocals.size();
while(locals>=1){
SQLocalVarInfo &lvi = _vlocals[locals-1];
if(sq_type(lvi._name)==OT_STRING && _string(lvi._name)==_string(name)){
return locals-1;
}
locals--;
}
return -1;
}
void SQFuncState::MarkLocalAsOuter(SQInteger pos)
{
SQLocalVarInfo &lvi = _vlocals[pos];
lvi._end_op = UINT_MINUS_ONE;
_outers++;
}
SQInteger SQFuncState::GetOuterVariable(const SQObject &name)
{
SQInteger outers = _outervalues.size();
for(SQInteger i = 0; i<outers; i++) {
if(_string(_outervalues[i]._name) == _string(name))
return i;
}
SQInteger pos=-1;
if(_parent) {
pos = _parent->GetLocalVariable(name);
if(pos == -1) {
pos = _parent->GetOuterVariable(name);
if(pos != -1) {
_outervalues.push_back(SQOuterVar(name,SQObjectPtr(SQInteger(pos)),otOUTER)); //local
return _outervalues.size() - 1;
}
}
else {
_parent->MarkLocalAsOuter(pos);
_outervalues.push_back(SQOuterVar(name,SQObjectPtr(SQInteger(pos)),otLOCAL)); //local
return _outervalues.size() - 1;
}
}
return -1;
}
void SQFuncState::AddParameter(const SQObject &name)
{
PushLocalVariable(name);
_parameters.push_back(name);
}
void SQFuncState::AddLineInfos(SQInteger line,bool lineop,bool force)
{
if(_lastline!=line || force){
SQLineInfo li;
li._line=line;li._op=(GetCurrentPos()+1);
if(lineop)AddInstruction(_OP_LINE,0,line);
if(_lastline!=line) {
_lineinfos.push_back(li);
}
_lastline=line;
}
}
void SQFuncState::DiscardTarget()
{
SQInteger discardedtarget = PopTarget();
SQInteger size = _instructions.size();
if(size > 0 && _optimization){
SQInstruction &pi = _instructions[size-1];//previous instruction
switch(pi.op) {
case _OP_SET:case _OP_NEWSLOT:case _OP_SETOUTER:case _OP_CALL:
if(pi._arg0 == discardedtarget) {
pi._arg0 = 0xFF;
}
}
}
}
void SQFuncState::AddInstruction(SQInstruction &i)
{
SQInteger size = _instructions.size();
if(size > 0 && _optimization){ //simple optimizer
SQInstruction &pi = _instructions[size-1];//previous instruction
switch(i.op) {
case _OP_JZ:
if( pi.op == _OP_CMP && pi._arg1 < 0xFF) {
pi.op = _OP_JCMP;
pi._arg0 = (unsigned char)pi._arg1;
pi._arg1 = i._arg1;
return;
}
break;
case _OP_SET:
case _OP_NEWSLOT:
if(i._arg0 == i._arg3) {
i._arg0 = 0xFF;
}
break;
case _OP_SETOUTER:
if(i._arg0 == i._arg2) {
i._arg0 = 0xFF;
}
break;
case _OP_RETURN:
if( _parent && i._arg0 != MAX_FUNC_STACKSIZE && pi.op == _OP_CALL && _returnexp < size-1) {
pi.op = _OP_TAILCALL;
} else if(pi.op == _OP_CLOSE){
pi = i;
return;
}
break;
case _OP_GET:
if( pi.op == _OP_LOAD && pi._arg0 == i._arg2 && (!IsLocal(pi._arg0))){
pi._arg2 = (unsigned char)i._arg1;
pi.op = _OP_GETK;
pi._arg0 = i._arg0;
return;
}
break;
case _OP_PREPCALL:
if( pi.op == _OP_LOAD && pi._arg0 == i._arg1 && (!IsLocal(pi._arg0))){
pi.op = _OP_PREPCALLK;
pi._arg0 = i._arg0;
pi._arg2 = i._arg2;
pi._arg3 = i._arg3;
return;
}
break;
case _OP_APPENDARRAY: {
SQInteger aat = -1;
switch(pi.op) {
case _OP_LOAD: aat = AAT_LITERAL; break;
case _OP_LOADINT: aat = AAT_INT; break;
case _OP_LOADBOOL: aat = AAT_BOOL; break;
case _OP_LOADFLOAT: aat = AAT_FLOAT; break;
default: break;
}
if(aat != -1 && pi._arg0 == i._arg1 && (!IsLocal(pi._arg0))){
pi.op = _OP_APPENDARRAY;
pi._arg0 = i._arg0;
pi._arg2 = (unsigned char)aat;
pi._arg3 = MAX_FUNC_STACKSIZE;
return;
}
}
break;
case _OP_MOVE:
switch(pi.op) {
case _OP_GET: case _OP_ADD: case _OP_SUB: case _OP_MUL: case _OP_DIV: case _OP_MOD: case _OP_BITW:
case _OP_LOADINT: case _OP_LOADFLOAT: case _OP_LOADBOOL: case _OP_LOAD:
if(pi._arg0 == i._arg1)
{
pi._arg0 = i._arg0;
_optimization = false;
//_result_elimination = false;
return;
}
}
if(pi.op == _OP_MOVE)
{
pi.op = _OP_DMOVE;
pi._arg2 = i._arg0;
pi._arg3 = (unsigned char)i._arg1;
return;
}
break;
case _OP_LOAD:
if(pi.op == _OP_LOAD && i._arg1 < 256) {
pi.op = _OP_DLOAD;
pi._arg2 = i._arg0;
pi._arg3 = (unsigned char)i._arg1;
return;
}
break;
case _OP_EQ:case _OP_NE:
if(pi.op == _OP_LOAD && pi._arg0 == i._arg1 && (!IsLocal(pi._arg0) ))
{
pi.op = i.op;
pi._arg0 = i._arg0;
pi._arg2 = i._arg2;
pi._arg3 = MAX_FUNC_STACKSIZE;
return;
}
break;
case _OP_LOADNULLS:
if((pi.op == _OP_LOADNULLS && pi._arg0+pi._arg1 == i._arg0)) {
pi._arg1 = pi._arg1 + 1;
pi.op = _OP_LOADNULLS;
return;
}
break;
case _OP_LINE:
if(pi.op == _OP_LINE) {
_instructions.pop_back();
_lineinfos.pop_back();
}
break;
}
}
_optimization = true;
_instructions.push_back(i);
}
SQObject SQFuncState::CreateString(const SQChar *s,SQInteger len)
{
SQObjectPtr ns(SQString::Create(_sharedstate,s,len));
_table(_strings)->NewSlot(ns,(SQInteger)1);
return ns;
}
SQObject SQFuncState::CreateTable()
{
SQObjectPtr nt(SQTable::Create(_sharedstate,0));
_table(_strings)->NewSlot(nt,(SQInteger)1);
return nt;
}
SQFunctionProto *SQFuncState::BuildProto()
{
SQFunctionProto *f=SQFunctionProto::Create(_ss,_instructions.size(),
_nliterals,_parameters.size(),_functions.size(),_outervalues.size(),
_lineinfos.size(),_localvarinfos.size(),_defaultparams.size());
SQObjectPtr refidx,key,val;
SQInteger idx;
f->_stacksize = _stacksize;
f->_sourcename = _sourcename;
f->_bgenerator = _bgenerator;
f->_name = _name;
while((idx=_table(_literals)->Next(false,refidx,key,val))!=-1) {
f->_literals[_integer(val)]=key;
refidx=idx;
}
for(SQUnsignedInteger nf = 0; nf < _functions.size(); nf++) f->_functions[nf] = _functions[nf];
for(SQUnsignedInteger np = 0; np < _parameters.size(); np++) f->_parameters[np] = _parameters[np];
for(SQUnsignedInteger no = 0; no < _outervalues.size(); no++) f->_outervalues[no] = _outervalues[no];
for(SQUnsignedInteger nl = 0; nl < _localvarinfos.size(); nl++) f->_localvarinfos[nl] = _localvarinfos[nl];
for(SQUnsignedInteger ni = 0; ni < _lineinfos.size(); ni++) f->_lineinfos[ni] = _lineinfos[ni];
for(SQUnsignedInteger nd = 0; nd < _defaultparams.size(); nd++) f->_defaultparams[nd] = _defaultparams[nd];
memcpy(f->_instructions,&_instructions[0],_instructions.size()*sizeof(SQInstruction));
f->_varparams = _varparams;
return f;
}
SQFuncState *SQFuncState::PushChildState(SQSharedState *ss)
{
SQFuncState *child = (SQFuncState *)sq_malloc(sizeof(SQFuncState));
new (child) SQFuncState(ss,this,_errfunc,_errtarget);
_childstates.push_back(child);
return child;
}
void SQFuncState::PopChildState()
{
SQFuncState *child = _childstates.back();
sq_delete(child,SQFuncState);
_childstates.pop_back();
}
SQFuncState::~SQFuncState()
{
while(_childstates.size() > 0)
{
PopChildState();
}
}
#endif
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