Organize compiler

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Augusto Gunsch 2020-12-31 20:02:04 -03:00
parent 26de7337da
commit b9f016f82a
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8 changed files with 325 additions and 276 deletions

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#include "compiler.h" #include "compiler.h"
/* compiler-expressions /* compiler-expressions
* Subroutines for dealing and compiling expressions and singular terms. */ * Functions for dealing and compiling expressions and singular terms. */
// Dealing with singular terms // Dealing with singular terms
LINEBLOCK* compilesubroutcall(SCOPE* s, SUBROUTCALL* call); LINEBLOCK* compilesubroutcall(SCOPE* s, SUBROUTCALL* call);

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#include <stdlib.h>
#include <string.h>
#include "compiler-expressions.h"
#include "compiler-statements.h"
#include "compiler-util.h"
/* BEGIN FORWARD DECLARATIONS */
// Miscelaneous
LINE* popthat();
LINE* pushtemp();
char* mkcondlabel(char* name, int count);
// Handling individual statements
LINEBLOCK* compileret(SCOPE* s, TERM* e);
LINEBLOCK* compileif(COMPILER* c, SCOPE* s, IFSTATEMENT* st);
LINEBLOCK* compilewhile(COMPILER* c, SCOPE* s, CONDSTATEMENT* w);
LINEBLOCK* compilelet(SCOPE* s, LETSTATEMENT* l);
LINEBLOCK* compilestatement(COMPILER* c, SCOPE* s, STATEMENT* st);
/* END FORWARD DECLARATIONS */
// Miscelaneous
LINE* popthat() {
char* popthat[] = { "pop", "that", "0" };
return mkln(popthat);
}
LINE* pushtemp() {
char* pushtemp[] = { "push", "temp", "0" };
return mkln(pushtemp);
}
char* mkcondlabel(char* name, int count) {
int sz = (strlen(name) + countplaces(count) + 1) * sizeof(char);
char* result = (char*)malloc(sz);
sprintf(result, "%s%i", name, count);
return result;
}
// Handling individual statements
LINEBLOCK* compileret(SCOPE* s, TERM* e) {
LINE* ret = onetoken("return");
LINEBLOCK* blk = mklnblk(ret);
// void subroutdecs return 0
if(e == NULL) {
char* tokens[] = { "push", "constant", "0" };
appendlnbefore(blk, mkln(tokens));
} else
blk = mergelnblks(compileexpression(s, e), blk);
return blk;
}
LINEBLOCK* compileif(COMPILER* c, SCOPE* s, IFSTATEMENT* st) {
LINEBLOCK* blk = compileexpression(s, st->base->expression);
pthread_mutex_lock(&(c->ifmutex));
static int ifcount = 0;
int mycount = ifcount;
ifcount++;
pthread_mutex_unlock(&(c->ifmutex));
char* truelabel = mkcondlabel("IF_TRUE", mycount);
char* ifgoto[] = { "if-goto", truelabel };
appendln(blk, mkln(ifgoto));
char* falselabel = mkcondlabel("IF_FALSE", mycount);
char* gotofalse[] = { "goto", falselabel };
appendln(blk, mkln(gotofalse));
char* truelabelln[] = { "label", truelabel };
appendln(blk, mkln(truelabelln));
blk = mergelnblks(blk, compilestatements(c, s, st->base->statements));
char* endlabel;
bool haselse = st->elsestatements != NULL;
if(haselse) {
endlabel = mkcondlabel("IF_END", mycount);
char* endgoto[] = { "goto", endlabel };
appendln(blk, mkln(endgoto));
}
char* falselabelln[] = { "label", falselabel};
appendln(blk, mkln(falselabelln));
if(haselse) {
blk = mergelnblks(blk, compilestatements(c, s, st->elsestatements));
char* endlabelln[] = { "label", endlabel };
appendln(blk, mkln(endlabelln));
}
return blk;
}
LINEBLOCK* compilewhile(COMPILER* c, SCOPE* s, CONDSTATEMENT* w) {
LINEBLOCK* blk = compileexpression(s, w->expression);
pthread_mutex_lock(&(c->whilemutex));
static int whilecount = 0;
int mycount = whilecount;
whilecount++;
pthread_mutex_unlock(&(c->whilemutex));
char* explabel = mkcondlabel("WHILE_EXP", mycount);
char* explabelln[] = { "label", explabel };
appendlnbefore(blk, mkln(explabelln));
appendln(blk, onetoken("not"));
char* endlabel = mkcondlabel("WHILE_END", mycount);
char* ifgoto[] = { "if-goto", endlabel };
appendln(blk, mkln(ifgoto));
blk = mergelnblks(blk, compilestatements(c, s, w->statements));
char* gotoln[] = { "goto", explabel };
appendln(blk, mkln(gotoln));
char* endlabelln[] = { "label", endlabel };
appendln(blk, mkln(endlabelln));
return blk;
}
LINEBLOCK* compilelet(SCOPE* s, LETSTATEMENT* l) {
LINEBLOCK* blk = compileexpression(s, l->expression);
if(l->arrayind != NULL) {
appendlnbefore(blk, onetoken("add"));
appendlnbefore(blk, pushvar(s, l->varname));
blk = mergelnblks(compileexpression(s, l->arrayind), blk);
appendln(blk, poptemp());
appendln(blk, popthatadd());
appendln(blk, pushtemp());
appendln(blk, popthat());
}
else
appendln(blk, popvar(s, l->varname));
return blk;
}
LINEBLOCK* compilestatement(COMPILER* c, SCOPE* s, STATEMENT* st) {
s->currdebug = st->debug;
if(st->type == dostatement) return compilesubroutcall(s, st->dostatement);
if(st->type == returnstatement) return compileret(s, st->retstatement);
if(st->type == ifstatement) return compileif(c, s, st->ifstatement);
if(st->type == whilestatement) return compilewhile(c, s, st->whilestatement);
if(st->type == letstatement) return compilelet(s, st->letstatement);
eprintf("UNSUPPORTED type %i\n", st->type);
exit(1);
}
LINEBLOCK* compilestatements(COMPILER* c, SCOPE* s, STATEMENT* sts) {
LINEBLOCK* head = NULL;
while(sts != NULL) {
head = mergelnblks(head, compilestatement(c, s, sts));
sts = sts->next;
}
return head;
}

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#ifndef COMPILER_STATEMENTS_H
#define COMPILER_STATEMENTS_H
#include "compiler.h"
/* compiler-statements
* Single function for compiling statements */
LINEBLOCK* compilestatements(COMPILER* c, SCOPE* s, STATEMENT* sts);
#endif

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#include <stdlib.h>
#include "compiler-statements.h"
#include "compiler-structure.h"
#include "compiler-util.h"
/* BEGIN FORWARD DECLARATIONS */
// Miscelaneous
int countlocalvars(VARDEC* decs);
int countstrs(STRINGLIST* ls);
int getobjsize(CLASS* c);
LINE* mksubdeclabel(CLASS* c, SUBROUTDEC* sd);
// Compiling methods
LINEBLOCK* compilefunbody(COMPILER* c, SCOPE* s, CLASS* cl, SUBROUTBODY* b);
LINEBLOCK* compilefundec(COMPILER* c, SCOPE* s, CLASS* cl, SUBROUTDEC* f);
LINEBLOCK* compileconstructor(COMPILER* c, SCOPE* s, CLASS* cl, SUBROUTDEC* con);
LINEBLOCK* compilemethod(COMPILER* c, SCOPE* s, CLASS* cl, SUBROUTDEC* m);
/* END FORWARD DECLARATIONS */
// Miscelaneous
int countlocalvars(VARDEC* decs) {
int i = 0;
while(decs != NULL) {
STRINGLIST* curr = decs->names;
while(curr != NULL) {
i++;
curr = curr->next;
}
decs = decs->next;
}
return i;
}
int countstrs(STRINGLIST* ls) {
int count = 0;
while(ls != NULL) {
count++;
ls = ls->next;
}
return count;
}
int getobjsize(CLASS* c) {
CLASSVARDEC* curr = c->vardecs;
int count = 0;
while(curr != NULL) {
if(curr->type == field)
count += countstrs(curr->base->names);
curr = curr->next;
}
return count;
}
LINE* mksubdeclabel(CLASS* c, SUBROUTDEC* sd) {
char* labelstrs[] = { "function", dotlabel(c->name, sd->name), itoa(countlocalvars(sd->body->vardecs)) };
LINE* label = mkln(labelstrs);
free(labelstrs[1]);
free(labelstrs[2]);
label->next = NULL;
return label;
}
// Compiling methods
LINEBLOCK* compilefunbody(COMPILER* c, SCOPE* s, CLASS* cl, SUBROUTBODY* b) {
SCOPE* myscope = mkscope(s);
myscope->currclass = cl;
if(b->vardecs != NULL)
addlocalvars(s, b->vardecs);
LINEBLOCK* head = compilestatements(c, myscope, b->statements);
return head;
}
LINEBLOCK* compilefundec(COMPILER* c, SCOPE* s, CLASS* cl, SUBROUTDEC* f) {
LINE* label = mksubdeclabel(cl, f);
if(f->body->statements != NULL) {
LINEBLOCK* body = compilefunbody(c, s, cl, f->body);
appendlnbefore(body, label);
return body;
}
else
return mklnblk(label);
}
LINEBLOCK* compileconstructor(COMPILER* c, SCOPE* s, CLASS* cl, SUBROUTDEC* con) {
LINE* label = mksubdeclabel(cl, con);
LINEBLOCK* blk = mklnblk(label);
char* size[] = { "push", "constant", itoa(getobjsize(cl)) };
char* memalloc[] = { "call", "Memory.alloc", "1" };
char* poppointer[] = { "pop", "pointer", "0" };
appendln(blk, mkln(size));
appendln(blk, mkln(memalloc));
appendln(blk, mkln(poppointer));
free(size[2]);
if(con->body != NULL)
return mergelnblks(blk, compilefunbody(c, s, cl, con->body));
else
return blk;
}
LINEBLOCK* compilemethod(COMPILER* c, SCOPE* s, CLASS* cl, SUBROUTDEC* m) {
LINE* label = mksubdeclabel(cl, m);
LINEBLOCK* blk = mklnblk(label);
char* pusharg0[] = { "push", "argument", "0" };
char* poppointer[] = { "pop", "pointer", "0" };
appendln(blk, mkln(pusharg0));
appendln(blk, mkln(poppointer));
if(m->body != NULL)
return mergelnblks(blk, compilefunbody(c, s, cl, m->body));
else
return blk;
}
LINEBLOCK* compilesubroutdec(COMPILER* c, SCOPE* s, CLASS* cl, SUBROUTDEC* sd) {
SCOPE* myscope = mkscope(s);
if(sd->parameters != NULL)
addparameters(myscope, sd->subroutclass == method, sd->parameters);
if(sd->subroutclass == function)
return compilefundec(c, myscope, cl, sd);
if(sd->subroutclass == constructor)
return compileconstructor(c, myscope, cl, sd);
return compilemethod(c, myscope, cl, sd);
}

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#ifndef COMPILER_STRUCTURE_H
#define COMPILER_STRUCTURE_H
#include "compiler.h"
/* compiler-structure
* Module for dealing with and compiling general program structure. */
LINEBLOCK* compilesubroutdec(COMPILER* c, SCOPE* s, CLASS* cl, SUBROUTDEC* sd);
#endif

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@ -4,6 +4,9 @@
#include "compiler-scopes.h" #include "compiler-scopes.h"
#include "compiler.h" #include "compiler.h"
/* compiler-util
* Random utilities for the compiler. */
#define mkln(id) mksimpleln(id, strcount(id)) #define mkln(id) mksimpleln(id, strcount(id))
LINE* onetoken(char* str); LINE* onetoken(char* str);

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@ -1,280 +1,9 @@
#include <stdlib.h> #include <stdlib.h>
#include <string.h> #include "compiler-structure.h"
#include "compiler.h" #include "compiler.h"
#include "compiler-util.h"
#include "compiler-expressions.h"
LINEBLOCK* compilestatements(COMPILER* c, SCOPE* s, STATEMENT* sts);
LINEBLOCK* compileexpression(SCOPE* s, TERM* e);
int countparameters(PARAMETER* params) {
int i = 0;
while(params != NULL) {
i++;
params = params->next;
}
return i;
}
int countlocalvars(VARDEC* decs) {
int i = 0;
while(decs != NULL) {
STRINGLIST* curr = decs->names;
while(curr != NULL) {
i++;
curr = curr->next;
}
decs = decs->next;
}
return i;
}
char* mkcondlabel(char* name, int count) {
int sz = (strlen(name) + countplaces(count) + 1) * sizeof(char);
char* result = (char*)malloc(sz);
sprintf(result, "%s%i", name, count);
return result;
}
LINE* pushthatadd() {
char* pushthatadd[] = { "push", "pointer", "1" };
return mkln(pushthatadd);
}
LINE* popthat() {
char* popthat[] = { "pop", "that", "0" };
return mkln(popthat);
}
LINE* pushtemp() {
char* pushtemp[] = { "push", "temp", "0" };
return mkln(pushtemp);
}
LINEBLOCK* compileret(SCOPE* s, TERM* e) {
LINE* ret = onetoken("return");
LINEBLOCK* blk = mklnblk(ret);
// void subroutdecs return 0
if(e == NULL) {
char* tokens[] = { "push", "constant", "0" };
appendlnbefore(blk, mkln(tokens));
} else
blk = mergelnblks(compileexpression(s, e), blk);
return blk;
}
LINEBLOCK* compileif(COMPILER* c, SCOPE* s, IFSTATEMENT* st) {
LINEBLOCK* blk = compileexpression(s, st->base->expression);
pthread_mutex_lock(&(c->ifmutex));
static int ifcount = 0;
int mycount = ifcount;
ifcount++;
pthread_mutex_unlock(&(c->ifmutex));
char* truelabel = mkcondlabel("IF_TRUE", mycount);
char* ifgoto[] = { "if-goto", truelabel };
appendln(blk, mkln(ifgoto));
char* falselabel = mkcondlabel("IF_FALSE", mycount);
char* gotofalse[] = { "goto", falselabel };
appendln(blk, mkln(gotofalse));
char* truelabelln[] = { "label", truelabel };
appendln(blk, mkln(truelabelln));
blk = mergelnblks(blk, compilestatements(c, s, st->base->statements));
char* endlabel;
bool haselse = st->elsestatements != NULL;
if(haselse) {
endlabel = mkcondlabel("IF_END", mycount);
char* endgoto[] = { "goto", endlabel };
appendln(blk, mkln(endgoto));
}
char* falselabelln[] = { "label", falselabel};
appendln(blk, mkln(falselabelln));
if(haselse) {
blk = mergelnblks(blk, compilestatements(c, s, st->elsestatements));
char* endlabelln[] = { "label", endlabel };
appendln(blk, mkln(endlabelln));
}
return blk;
}
LINEBLOCK* compilewhile(COMPILER* c, SCOPE* s, CONDSTATEMENT* w) {
LINEBLOCK* blk = compileexpression(s, w->expression);
pthread_mutex_lock(&(c->whilemutex));
static int whilecount = 0;
int mycount = whilecount;
whilecount++;
pthread_mutex_unlock(&(c->whilemutex));
char* explabel = mkcondlabel("WHILE_EXP", mycount);
char* explabelln[] = { "label", explabel };
appendlnbefore(blk, mkln(explabelln));
appendln(blk, onetoken("not"));
char* endlabel = mkcondlabel("WHILE_END", mycount);
char* ifgoto[] = { "if-goto", endlabel };
appendln(blk, mkln(ifgoto));
blk = mergelnblks(blk, compilestatements(c, s, w->statements));
char* gotoln[] = { "goto", explabel };
appendln(blk, mkln(gotoln));
char* endlabelln[] = { "label", endlabel };
appendln(blk, mkln(endlabelln));
return blk;
}
LINEBLOCK* compilelet(SCOPE* s, LETSTATEMENT* l) {
LINEBLOCK* blk = compileexpression(s, l->expression);
if(l->arrayind != NULL) {
appendlnbefore(blk, onetoken("add"));
appendlnbefore(blk, pushvar(s, l->varname));
blk = mergelnblks(compileexpression(s, l->arrayind), blk);
appendln(blk, poptemp());
appendln(blk, popthatadd());
appendln(blk, pushtemp());
appendln(blk, popthat());
}
else
appendln(blk, popvar(s, l->varname));
return blk;
}
LINEBLOCK* compilestatement(COMPILER* c, SCOPE* s, STATEMENT* st) {
s->currdebug = st->debug;
if(st->type == dostatement) return compilesubroutcall(s, st->dostatement);
if(st->type == returnstatement) return compileret(s, st->retstatement);
if(st->type == ifstatement) return compileif(c, s, st->ifstatement);
if(st->type == whilestatement) return compilewhile(c, s, st->whilestatement);
if(st->type == letstatement) return compilelet(s, st->letstatement);
eprintf("UNSUPPORTED type %i\n", st->type);
exit(1);
}
LINEBLOCK* compilestatements(COMPILER* c, SCOPE* s, STATEMENT* sts) {
LINEBLOCK* head = NULL;
while(sts != NULL) {
head = mergelnblks(head, compilestatement(c, s, sts));
sts = sts->next;
}
return head;
}
LINEBLOCK* compilefunbody(COMPILER* c, SCOPE* s, CLASS* cl, SUBROUTBODY* b) {
SCOPE* myscope = mkscope(s);
myscope->currclass = cl;
if(b->vardecs != NULL)
addlocalvars(s, b->vardecs);
LINEBLOCK* head = compilestatements(c, myscope, b->statements);
return head;
}
LINE* mksubdeclabel(CLASS* c, SUBROUTDEC* sd) {
char* labelstrs[] = { "function", dotlabel(c->name, sd->name), itoa(countlocalvars(sd->body->vardecs)) };
LINE* label = mkln(labelstrs);
free(labelstrs[1]);
free(labelstrs[2]);
label->next = NULL;
return label;
}
LINEBLOCK* compilefundec(COMPILER* c, SCOPE* s, CLASS* cl, SUBROUTDEC* f) {
LINE* label = mksubdeclabel(cl, f);
if(f->body->statements != NULL) {
LINEBLOCK* body = compilefunbody(c, s, cl, f->body);
appendlnbefore(body, label);
return body;
}
else
return mklnblk(label);
}
int countstrs(STRINGLIST* ls) {
int count = 0;
while(ls != NULL) {
count++;
ls = ls->next;
}
return count;
}
int getobjsize(CLASS* c) {
CLASSVARDEC* curr = c->vardecs;
int count = 0;
while(curr != NULL) {
if(curr->type == field)
count += countstrs(curr->base->names);
curr = curr->next;
}
return count;
}
LINEBLOCK* compileconstructor(COMPILER* c, SCOPE* s, CLASS* cl, SUBROUTDEC* con) {
LINE* label = mksubdeclabel(cl, con);
LINEBLOCK* blk = mklnblk(label);
char* size[] = { "push", "constant", itoa(getobjsize(cl)) };
char* memalloc[] = { "call", "Memory.alloc", "1" };
char* poppointer[] = { "pop", "pointer", "0" };
appendln(blk, mkln(size));
appendln(blk, mkln(memalloc));
appendln(blk, mkln(poppointer));
free(size[2]);
if(con->body != NULL)
return mergelnblks(blk, compilefunbody(c, s, cl, con->body));
else
return blk;
}
LINEBLOCK* compilemethod(COMPILER* c, SCOPE* s, CLASS* cl, SUBROUTDEC* m) {
LINE* label = mksubdeclabel(cl, m);
LINEBLOCK* blk = mklnblk(label);
char* pusharg0[] = { "push", "argument", "0" };
char* poppointer[] = { "pop", "pointer", "0" };
appendln(blk, mkln(pusharg0));
appendln(blk, mkln(poppointer));
if(m->body != NULL)
return mergelnblks(blk, compilefunbody(c, s, cl, m->body));
else
return blk;
}
LINEBLOCK* compilesubroutdec(COMPILER* c, SCOPE* s, CLASS* cl, SUBROUTDEC* sd) {
// 'this' and arguments are pushed by caller
// Must have a 'return' at the end
// Label names must have class name too (see mapping)
// types: method, function, constructor
// must switch all of these
SCOPE* myscope = mkscope(s);
if(sd->parameters != NULL)
addparameters(myscope, sd->subroutclass == method, sd->parameters);
if(sd->subroutclass == function)
return compilefundec(c, myscope, cl, sd);
if(sd->subroutclass == constructor)
return compileconstructor(c, myscope, cl, sd);
return compilemethod(c, myscope, cl, sd);
}
/* This should be part of compiler-structure, but since it is used by other modules,
* it will stay here for convenience */
LINEBLOCK* compileclass(COMPILER* c, CLASS* class) { LINEBLOCK* compileclass(COMPILER* c, CLASS* class) {
SCOPE* topscope = mkscope(c->globalscope); SCOPE* topscope = mkscope(c->globalscope);
if(class->vardecs != NULL) if(class->vardecs != NULL)

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#include "vm-lines.h" #include "vm-lines.h"
#include "compiler-scopes.h" #include "compiler-scopes.h"
struct scope; /* compiler
* This is the file that should be included in other modules
* that want to compile a class/program. */
struct scope;
typedef struct compiler { typedef struct compiler {
pthread_mutex_t ifmutex; pthread_mutex_t ifmutex;
pthread_mutex_t whilemutex; pthread_mutex_t whilemutex;