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symbol.c
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symbol.c
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#include<math.h>
#include<stdlib.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <stdarg.h>
#include <stdbool.h>
#include "syntax.tab.h"
#include "symbol.h"
extern int yylineno;
extern char* yytext;
FILE *fp;
int lineno=1;
int labelcount=0;
int tempcount=0;
int global_num=0;
int reg_count=0;
int func_offset=0;
struct sym_node *propTable = NULL, *varTable = NULL;
struct fun_node *funcTable = NULL;
struct float_node *flconst = NULL, *fltail = NULL;
struct fun_node *curFunc = NULL;
struct fun_node *trans_curFunc = NULL;
struct intercode* trans_program(int x);
struct intercode* trans_args(int x);
struct intercode* trans_comp_st(int x);
struct temp_var *temp_head=NULL;
int argList[1024];
int temp_var_count=0;
int arg_len=0;
extern int cnt;
void open_file(){
fp=fopen("final.asm","w");
}
void close_file(){
fclose(fp);
}
int new_tmp(){
++tempcount;
return tempcount;
}
int new_label(){
++labelcount;
return labelcount;
}
struct temp_var* add_temp_var(char *x){
struct temp_var *temp=(struct temp_var *) malloc(sizeof(struct temp_var));
if(temp_var_count==0){
strcpy(temp->name,x);
temp->offset=0;
temp_head=temp;
temp_head->next=NULL;
temp_var_count++;
}
else{
int i=0;
struct temp_var *t=temp_head;
for(i=0;i<temp_var_count-1;i++){
t=t->next;
}
strcpy(temp->name,x);
temp->offset=temp_var_count*4;
t->next=temp;
temp->next=NULL;
temp_var_count++;
}
return temp;
}
struct temp_var* find_temp_var(char *x){
int i=0;
struct temp_var *temp=temp_head;
if(temp_var_count!=0&&strcmp(temp->name,x)==0) return temp_head;
for(i=0;i<temp_var_count;i++){
if(strcmp(temp->name,x)==0) return temp;
temp=temp->next;
}
return NULL;
}
char *reg(char *x){
char regg[10];
sprintf(regg,"$t%d",reg_count);
reg_count++;
return regg;
}
void print_oject_code(){
fprintf(fp,".data\n");
fprintf(fp,"_prompt: .asciiz \"Enter an integer:\"\n");
fprintf(fp,"_ret: .asciiz \"\\n\"\n");
fprintf(fp,".globl main\n");
fprintf(fp,".text\n");
fprintf(fp,"read:\n");
fprintf(fp," li $v0, 4\n");
fprintf(fp," la $a0, _prompt\n");
fprintf(fp," syscall\n");
fprintf(fp," li $v0, 5\n");
fprintf(fp," syscall\n");
fprintf(fp," jr $ra\n");
fprintf(fp,"\n");
fprintf(fp,"write:\n");
fprintf(fp," li $v0, 1\n");
fprintf(fp," syscall\n");
fprintf(fp," li $v0, 4\n");
fprintf(fp," la $a0, _ret\n");
fprintf(fp," syscall\n");
fprintf(fp," move $v0, $0\n");
fprintf(fp," jr $ra\n");
fprintf(fp,"\n");
}
struct intercode* merge(struct intercode* i1,struct intercode* i2){
if(i1==NULL){
if(i2==NULL){
return NULL;
}
return i2;
}
struct intercode* temp=i1;
while(temp->next){
temp=temp->next;
}
temp->next=i2;
return i1;
};
void print_intercode(struct intercode* i){
struct intercode* temp=i;
while(temp!=NULL){
printf("%s",temp->content);
temp=temp->next;
}
}
void print_sym(){
struct sym_node *head=propTable;
while(head!=NULL){
printf("%s\n",head->name);
head=head->next;
}
printf("-----\n");
head=varTable;
while(head!=NULL){
printf("%s\n",head->name);
head=head->next;
}
printf("-----\n");
struct fun_node *head_func=funcTable;
while(head!=NULL){
printf("%s\n",head->name);
head=head->next;
}
}
int newtree0(int cnt,char *str,int line,char *s,int t)
{
int i=0;
for(i=0; i<maxn; i++)
{
node[cnt].child[i]=-1;
}
strcpy(node[cnt].type,str);
strcpy(node[cnt].cont,s);
strcpy(node[cnt].s,s);
if(!strcmp(node[cnt].type,"INT")){
strcpy(node[cnt].ty,"int");
node[cnt].val=atoi(yytext);
}
else if(!strcmp(node[cnt].type,"FLOAT")){
strcpy(node[cnt].ty,"float");
node[cnt].value=atof(yytext);
}
else if(!strcmp(node[cnt].type,"TYPE")){
strcpy(node[cnt].ty,yytext);
}
else{
strcpy(node[cnt].s,s);
}
//printf("%s\n",node[cnt].s);
node[cnt].line=line;
node[cnt].t=t;
node[cnt].child_num=0;
return cnt;
}
int newtree1(int cnt,int x,char *s,int line,char *str,int t)
{
int i=0;
for(i=0; i<maxn; i++)
{
node[cnt].child[i]=-1;
}
node[cnt].child[0]=x;
node[node[cnt].child[0]].brother=-1;
node[cnt].line=line;
for(i=0; i<1; i++)
{
if(node[cnt].line>node[node[cnt].child[i]].line)node[cnt].line=node[node[cnt].child[i]].line;
}
strcpy(node[cnt].s,s);
strcpy(node[cnt].type,str);
strcpy(node[cnt].cont,str);
node[cnt].t=t;
//one child
strcpy(node[cnt].type,node[node[cnt].child[0]].type);
node[cnt].tag=node[node[cnt].child[0]].tag;
strcpy(node[cnt].ty,node[node[cnt].child[0]].ty);
node[cnt].child_num=1;
return cnt;
}
int newtree2(int cnt,int x,int y,char *s,int line,char *str,int t)
{
int i=0;
for(i=0; i<maxn; i++)
{
node[cnt].child[i]=-1;
}
node[cnt].child[0]=x;
node[cnt].child[1]=y;
node[node[cnt].child[0]].brother=y;
node[node[cnt].child[1]].brother=-1;
node[cnt].line=line;
for(i=0; i<2; i++)
{
if(node[cnt].line>node[node[cnt].child[i]].line)node[cnt].line=node[node[cnt].child[i]].line;
}
strcpy(node[cnt].s,s);
strcpy(node[cnt].type,str);
strcpy(node[cnt].cont,str);
node[cnt].t=t;
node[cnt].child_num=2;
return cnt;
}
int newtree3(int cnt,int x,int y,int z,char *s,int line,char *str,int t)
{
int i=0;
for(i=0; i<maxn; i++)
{
node[cnt].child[i]=-1;
}
node[cnt].child[0]=x;
node[cnt].child[1]=y;
node[cnt].child[2]=z;
node[node[cnt].child[0]].brother=y;
node[node[cnt].child[1]].brother=z;
node[node[cnt].child[2]].brother=-1;
node[cnt].line=line;
for(i=0; i<3; i++)
{
if(node[cnt].line>node[node[cnt].child[i]].line)node[cnt].line=node[node[cnt].child[i]].line;
}
strcpy(node[cnt].s,s);
strcpy(node[cnt].type,str);
strcpy(node[cnt].cont,str);
node[cnt].t=t;
node[cnt].child_num=3;
return cnt;
}
int newtree4(int cnt,int x,int y,int z,int w,char *s,int line,char *str,int t)
{
int i=0;
for(i=0; i<maxn; i++)
{
node[cnt].child[i]=-1;
}
node[cnt].child[0]=x;
node[cnt].child[1]=y;
node[cnt].child[2]=z;
node[cnt].child[3]=w;
node[node[cnt].child[0]].brother=y;
node[node[cnt].child[1]].brother=z;
node[node[cnt].child[2]].brother=w;
node[node[cnt].child[3]].brother=-1;
node[cnt].line=line;
for(i=0; i<4; i++)
{
if(node[cnt].line>node[node[cnt].child[i]].line)node[cnt].line=node[node[cnt].child[i]].line;
}
strcpy(node[cnt].s,s);
strcpy(node[cnt].type,str);
strcpy(node[cnt].cont,str);
node[cnt].t=t;
node[cnt].child_num=4;
return cnt;
}
int newtree5(int cnt,int x,int y,int z,int w,int p,char *s,int line,char *str,int t)
{
int i=0;
for(i=0; i<maxn; i++)
{
node[cnt].child[i]=-1;
}
node[cnt].child[0]=x;
node[cnt].child[1]=y;
node[cnt].child[2]=z;
node[cnt].child[3]=w;
node[cnt].child[4]=p;
node[node[cnt].child[0]].brother=y;
node[node[cnt].child[1]].brother=z;
node[node[cnt].child[2]].brother=w;
node[node[cnt].child[3]].brother=p;
node[node[cnt].child[4]].brother=-1;
node[cnt].line=line;
for(i=0; i<5; i++)
{
if(node[cnt].line>node[node[cnt].child[i]].line)node[cnt].line=node[node[cnt].child[i]].line;
}
strcpy(node[cnt].s,s);
strcpy(node[cnt].type,str);
strcpy(node[cnt].cont,str);
node[cnt].t=t;
node[cnt].child_num=5;
return cnt;
}
int newtree6(int cnt,int x,int y,int z,int w,int p,int r,char *s,int line,char *str,int t)
{
int i=0;
for(i=0; i<maxn; i++)
{
node[cnt].child[i]=-1;
}
node[cnt].child[0]=x;
node[cnt].child[1]=y;
node[cnt].child[2]=z;
node[cnt].child[3]=w;
node[cnt].child[4]=p;
node[cnt].child[5]=r;
node[node[cnt].child[0]].brother=y;
node[node[cnt].child[1]].brother=z;
node[node[cnt].child[2]].brother=w;
node[node[cnt].child[3]].brother=p;
node[node[cnt].child[4]].brother=r;
node[node[cnt].child[5]].brother=-1;
node[cnt].line=line;
for(i=0; i<6; i++)
{
if(node[cnt].line>node[node[cnt].child[i]].line)node[cnt].line=node[node[cnt].child[i]].line;
}
strcpy(node[cnt].s,s);
strcpy(node[cnt].type,str);
strcpy(node[cnt].cont,str);
node[cnt].t=t;
node[cnt].child_num=6;
return cnt;
}
int newtree7(int cnt,int x,int y,int z,int w,int p,int r,int t,char *s,int line,char *str,int tt)
{
int i=0;
for(i=0; i<maxn; i++)
{
node[cnt].child[i]=-1;
}
node[cnt].child[0]=x;
node[cnt].child[1]=y;
node[cnt].child[2]=z;
node[cnt].child[3]=w;
node[cnt].child[4]=p;
node[cnt].child[5]=r;
node[cnt].child[6]=t;
node[node[cnt].child[0]].brother=y;
node[node[cnt].child[1]].brother=z;
node[node[cnt].child[2]].brother=w;
node[node[cnt].child[3]].brother=p;
node[node[cnt].child[4]].brother=r;
node[node[cnt].child[5]].brother=t;
node[node[cnt].child[6]].brother=-1;
node[cnt].line=line;
for(i=0; i<7; i++)
{
if(node[cnt].line>node[node[cnt].child[i]].line)node[cnt].line=node[node[cnt].child[i]].line;
}
strcpy(node[cnt].s,s);
strcpy(node[cnt].type,str);
strcpy(node[cnt].cont,str);
node[cnt].t=tt;
node[cnt].child_num=7;
return cnt;
}
void init()
{
int i=0;
int j=0;
for(i=0; i<1000; i++)
{
for(j=0; j<maxn; j++)
node[i].child[j]=-1;
}
}
void dfs(int root,int h)
{
int i=0;
int flag=1;
for(i=0; i<maxn; i++)
{
if(node[root].child[i]!=-1)
{
flag=0;
}
}
if(!flag)
{
for(i=0; i<h; i++)
{
printf(" ");
}
printf("%s (%d)\n",node[root].cont,node[root].line);
}
else
{
if(node[root].t==0)
{
for(i=0; i<h; i++)
{
printf(" ");
}
printf("%s: %s\n",node[root].cont,node[root].s);
lineno=node[root].line;
}
}
for(i=0; i<maxn; i++)
{
if(node[root].child[i]!=-1)
{
dfs(node[root].child[i],h+1);
}
}
return;
}
struct sym_node *createsym_node(enum sym_type symtype, struct sym_node *type, const char *name, struct sym_node *next, int lineno, struct sym_node *parent) {
struct sym_node *temp;
struct sym_node *n = (struct sym_node *) malloc(sizeof(struct sym_node));
n->symtype = symtype;
n->type = type;
strcpy(n->name, name);
n->size = 0;
n->next = next;
n->lineno = lineno;
n->param = false;
n->parent = parent;
n->number=global_num;
return n;
}
void initSymTable() {
propTable = createsym_node(S_FLOAT, NULL, "float", NULL, 0, NULL);
propTable = createsym_node(S_INT, NULL, "int", propTable, 0, NULL);
}
struct fun_node *lookupFunc(const char *s) {
struct fun_node *p = funcTable;
while (p != NULL) {
if (strcmp(p->name, s) == 0) {
return p;
}
p = p->next;
}
return NULL;
}
struct sym_node *lookupSym(struct sym_node *n, const char *s) {
if (!s) return NULL;
struct sym_node *p = n;
while (p != NULL) {
if (p->name && strcmp(p->name, s) == 0) {
return p;
}
p = p->next;
}
return NULL;
}
void addFunc(struct fun_node *f) {
if (!f) return;
f->next = funcTable;
funcTable = f;
}
struct sym_node *addTableItem(struct sym_node **table, struct sym_node *n) {
if (!n) return *table;
struct sym_node *p = n;
while (p->next != NULL) {
p = p->next;
}
p->next = *table;
return *table = n;
}
void addProp(struct sym_node *n) {
if (!n) return;
addTableItem(&propTable, n);
}
void addVar(struct sym_node *n) {
global_num++;
if (!n) return;
addTableItem(&varTable, n);
}
struct sym_node *sym_specifier(int x);
struct sym_node *sym_var_dec(struct sym_node *type, int x);
void sym_comp_st(int x);
struct exp_type sym_exp(int x);
struct exp_type initExpType(struct sym_node *leftVal, struct sym_node *prop) {
struct exp_type type;
type.isLeftVal = (leftVal != NULL);
type.leftVal = leftVal;
type.prop = prop;
return type;
}
bool sym_args(int x, struct sym_node *n, struct fun_node *f, int lv) {
bool ret = true;
if (strcmp(node[x].s,"Args")==0) {
struct exp_type type;
if (node[x].child_num==3) {
type = sym_exp(node[x].child[0]);
ret = sym_args(node[x].child[2], n->next, f, lv + 1);
} else if (node[x].child_num==1) {
type = sym_exp(node[x].child[0]);
if (lv < f->size) {
return false;
}
}
if (n == NULL) {
return false;
}
if (type.prop == n->type) {
return ret;
} else {
return false;
}
}
}
struct exp_type sym_exp(int x) {
if (node[x].child_num==3&&strcmp(node[node[x].child[1]].s,"ASSIGNOP")==0) {
struct exp_type type = sym_exp(node[x].child[0]);
struct exp_type type2 = sym_exp(node[x].child[2]);
return initExpType(NULL, type.prop);
} else if (node[x].child_num==3&&(strcmp(node[node[x].child[1]].s,"AND")==0||strcmp(node[node[x].child[1]].s,"OR")==0)){
struct exp_type type = sym_exp(node[x].child[0]);
struct exp_type type2 = sym_exp(node[x].child[2]);
return initExpType(NULL, type.prop);
} else if (node[x].child_num==3&&(strcmp(node[node[x].child[1]].s,"RELOP")==0||strcmp(node[node[x].child[1]].s,"PLUS")==0||strcmp(node[node[x].child[1]].s,"MINUS")==0||strcmp(node[node[x].child[1]].s,"STAR")==0||strcmp(node[node[x].child[1]].s,"DIV")==0)) {
struct exp_type type = sym_exp(node[x].child[0]);
struct exp_type type2 = sym_exp(node[x].child[2]);
return initExpType(NULL, type.prop);
} else if (node[x].child_num==3&&strcmp(node[node[x].child[1]].s,"Exp")==0) {
return sym_exp(node[x].child[1]);
} else if (node[x].child_num==2&&strcmp(node[node[x].child[0]].s,"MINUS")==0) {
struct exp_type type = sym_exp(node[x].child[1]);
return initExpType(NULL, type.prop);
} else if (node[x].child_num==2&&strcmp(node[node[x].child[0]].s,"NOT")==0) {
struct exp_type type = sym_exp(node[x].child[1]);
return initExpType(NULL, type.prop);
} else if (node[x].child_num>=3&&strcmp(node[node[x].child[1]].s,"LP")==0) {
if (node[x].child_num==4) {
struct fun_node *f = lookupFunc(node[node[x].child[0]].type);
sym_args(node[x].child[2], f->param, f, 1);
return initExpType(NULL, f->ret);
} else if (node[x].child_num==3) {
struct fun_node *f = lookupFunc(node[node[x].child[0]].type);
return initExpType(NULL, f->ret);
}
return initExpType(NULL, NULL);
} else if (node[x].child_num==4&&strcmp(node[node[x].child[0]].s,"Exp")==0) {
struct exp_type type = sym_exp(node[x].child[0]);
struct exp_type type2 = sym_exp(node[x].child[2]);
return initExpType(type.leftVal->type, type.leftVal->type->type);
} else if (strcmp(node[node[x].child[0]].s,"ID")==0) {
struct sym_node *n = lookupSym(varTable, node[node[x].child[0]].type);
return initExpType(n, n->type);
} else if (strcmp(node[node[x].child[0]].s,"INT")==0) {
struct sym_node *n = lookupSym(propTable, "int");
return initExpType(NULL,n);
} else if (strcmp(node[node[x].child[0]].s,"FLOAT")==0) {
struct float_node *fl = (struct float_node *) malloc(sizeof(struct float_node));
fl->v = node[node[x].child[0]].value;
fl->n = NULL;
if (fltail) {
fltail->n = fl;
fltail = fl;
} else {
fltail = flconst = fl;
}
return initExpType(NULL, lookupSym(propTable, "float"));
}
}
struct sym_node *sym_dec(struct sym_node *type, int x) {
if (strcmp(node[x].s,"Dec")==0) {
if (node[x].child_num == 1) {
struct sym_node *n = sym_var_dec(type, node[x].child[0]);
addVar(n);
return n;
} else if (node[x].child_num ==3) {
struct sym_node *n = sym_var_dec(type, node[x].child[0]);
struct exp_type exptype = sym_exp(node[x].child[2]);
addVar(n);
return n;
}
}
}
struct sym_node *sym_dec_list(struct sym_node *type, int x) {
if (strcmp(node[x].s,"DecList")==0) {
if (node[x].child_num==1) {
return sym_dec(type, node[x].child[0]);
} else if (node[x].child_num==3) {
struct sym_node *n = sym_dec_list(type, node[x].child[2]);
struct sym_node *n2 = sym_dec(type, node[x].child[0]);
struct sym_node *temp=varTable;
return n2;
}
}
return NULL;
}
struct sym_node *sym_def(int x) {
if (strcmp(node[x].s,"Def")==0) {
struct sym_node *type = sym_specifier(node[x].child[0]);
struct sym_node *n = sym_dec_list(type, node[x].child[1]);
return n;
}
return NULL;
}
struct sym_node *sym_def_list(int x) {
if (strcmp(node[x].s,"DefList")==0) {
if (node[x].child_num == 2) {
struct sym_node *n = sym_def(node[x].child[0]);
struct sym_node *n2 = sym_def_list(node[x].child[1]);
return n2;
}
}
return NULL;
}
struct sym_node *sym_specifier(int x) {
if (strcmp(node[node[x].child[0]].s,"Type")==0) {
return lookupSym(propTable, node[node[x].child[0]].type);
} else if (strcmp(node[node[x].child[0]].s,"Struct")==0) {
}
return NULL;
}
struct sym_node *sym_var_dec(struct sym_node *type, int x) {
if (strcmp(node[x].s,"VarDec")==0) {
if (node[x].child_num==1) {
return createsym_node(S_VAR, type, node[node[x].child[0]].type, NULL, node[node[x].child[0]].line, NULL);
struct sym_node *n = sym_var_dec(type, node[x].child[0]);
if (!n) return NULL;
struct sym_node *ret = createsym_node(S_ARRAY, n, n->name, NULL, node[node[x].child[0]].line, NULL);
n->parent = ret;
ret->size = node[node[x].child[1]].val;
return ret;
}
}
return NULL;
}
void sym_ext_dec_list(struct sym_node *type, int x) {
if (strcmp(node[x].s,"ExtDecList")==0) {
if (node[x].child_num==1) {
addVar(sym_var_dec(type, node[x].child[0]));
} else if (node[x].child_num==3) {
addVar(sym_var_dec(type, node[x].child[0]));
sym_ext_dec_list(type, node[x].child[2]);
}
}
}
struct fun_node *createFunNode(const char *name, struct sym_node *ret, int size, struct sym_node *param, int lineno) {
struct fun_node *f = (struct fun_node *) malloc(sizeof(struct fun_node));
struct fun_node *temp;
if (temp = lookupFunc(name)) {
f->name[0] = '\0';
} else {
strcpy(f->name, name);
}
f->ret = ret;
f->size = size;
f->param = param;
f->next = NULL;
f->lineno = lineno;
return f;
}
struct sym_node *sym_param_dec(int x) {
if (strcmp(node[x].s,"ParamDec")==0) {
struct sym_node *type = sym_specifier(node[x].child[0]);
struct sym_node *n = sym_var_dec(type, node[x].child[1]);
return n;
}
return NULL;
}
struct sym_node *sym_var_list(int x, int *ct) {
if (strcmp(node[x].s,"VarList")==0) {
if (node[x].child_num==3) {
int l;
struct sym_node *n = sym_param_dec(node[x].child[0]);
struct sym_node *n2 = sym_var_list(node[x].child[2], &l);
*ct = l + 1;
addTableItem(&n2, n);
return n2;
} else if (node[x].child_num==1) {
*ct = 1;
return sym_param_dec(node[x].child[0]);
}
}
}
struct fun_node *sym_fun_dec(int x) {
if (strcmp(node[x].s,"FunDec")==0) {
if (node[x].child_num==4) {
int ct;
struct sym_node *n = sym_var_list(node[x].child[2], &ct);
addVar(n);
struct fun_node *f = createFunNode(node[node[x].child[0]].type, NULL, ct, n, node[x].line);
return f;
} else if (node[x].child_num==3) {
// ID LP RP
struct fun_node *f = createFunNode(node[node[x].child[0]].type, NULL, 0, NULL, node[x].line);
return f;
}
}
}
void sym_stmt(int x) {
if (strcmp(node[node[x].child[0]].s,"Exp")==0) {
sym_exp(node[x].child[0]);
} else if (strcmp(node[node[x].child[0]].s,"CompSt")==0) {
sym_comp_st(node[x].child[0]);
} else if (strcmp(node[node[x].child[0]].s,"RETURN")==0) {
struct exp_type type = sym_exp(node[x].child[1]);
} else if (node[x].child_num==5&&strcmp(node[node[x].child[0]].s,"IF")==0) {
struct exp_type type = sym_exp(node[x].child[2]);
sym_stmt(node[x].child[0]);
} else if (node[x].child_num==7) {
struct exp_type type = sym_exp(node[x].child[2]);
sym_stmt(node[x].child[4]);
sym_stmt(node[x].child[6]);
} else if (strcmp(node[node[x].child[0]].s,"WHILE")==0) {
struct exp_type type = sym_exp(node[x].child[2]);
sym_stmt(node[x].child[4]);
}
}
void sym_stmt_list(int x) {
if (strcmp(node[x].s,"StmtList")==0) {
if (node[x].child_num==2) {
sym_stmt(node[x].child[0]);
sym_stmt_list(node[x].child[1]);
}
}
}
void sym_comp_st(int x) {
if (strcmp(node[x].s,"CompSt")==0) {
struct sym_node *n = sym_def_list(node[x].child[1]);
sym_stmt_list(node[x].child[2]);
}
}
bool sym_ext_def(int x) {
if (strcmp(node[x].s,"ExtDef")==0) {
if (strcmp(node[node[x].child[1]].s,"ExtDecList")==0) {
struct sym_node *type = sym_specifier(node[x].child[0]);
sym_ext_dec_list(type, node[x].child[1]);
} else if (node[x].child_num==2) {
sym_specifier(node[x].child[0]);
} else if (strcmp(node[node[x].child[1]].s,"FunDec")==0) {
struct sym_node *ret = sym_specifier(node[x].child[0]);
struct fun_node *f = sym_fun_dec(node[x].child[1]);
f->ret = ret;
addFunc(f);
curFunc = f;
sym_comp_st(node[x].child[2]);
curFunc = NULL;
}
return true;
}
return false;
}
void sym_ext_def_list(int x) {
if (node[x].child_num == 2) {
sym_ext_def(node[x].child[0]);
sym_ext_def_list(node[x].child[1]);
}
}
void sym_program(int x) {
init_sym();
if (strcmp(node[x].s,"Program")==0) {
sym_ext_def_list(node[x].child[0]);
}
open_file();
trans_program(x);
close_file();
}
void init_sym(){
struct sym_node* ret=lookupSym(propTable,"int");
struct fun_node* f=createFunNode("read",NULL,0,NULL,0);
f->ret=ret;
addFunc(f);
struct sym_node* type=lookupSym(propTable,"int");
struct sym_node* n=createsym_node(S_VAR,type,"const",NULL,0,NULL);
addVar(n);
f=createFunNode("write",NULL,1,n,0);
addFunc(f);
}
struct intercode*trans_exp(int x,int place) {
if (strcmp(node[node[x].child[1]].s,"ASSIGNOP")==0) {
if(strcmp(node[node[node[x].child[0]].child[0]].s,"ID")==0){
int t1=new_tmp();
struct intercode* i1=trans_exp(node[x].child[2],t1);
struct intercode* i2=(struct intercode *) malloc(sizeof(struct intercode));
struct sym_node *temp=lookupSym(varTable,node[node[node[x].child[0]].child[0]].type);
if(place==-1){
sprintf(i2->content,"v%d := t%d\n",temp->number,t1);
char xx[10];
char y[10];
sprintf(xx,"v%d",temp->number);
sprintf(y,"t%d",t1);
trans_move(xx,y);
}
else{
char xx[10];
char y[10];
char z[10];
sprintf(xx,"v%d",temp->number);
sprintf(y,"t%d",t1);
sprintf(z,"t%d",place);
trans_move(xx,y);
trans_move(z,xx);
sprintf(i2->content,"v%d := t%d\nt%d := v%d\n",temp->number,t1,place,temp->number);
}
i2->next=NULL;
i1=merge(i1,i2);
return i1;
}
}
else if (strcmp(node[node[x].child[1]].s,"Exp")==0) {
return trans_exp(node[x].child[1],place);
}
else if(node[x].child_num>1&&strcmp(node[node[x].child[0]].s,"ID")==0){
if(node[x].child_num==3){
if(!strcmp(node[node[x].child[0]].type,"read")){
struct intercode* cd=(struct intercode *) malloc(sizeof(struct intercode));
sprintf(cd->content,"READ t%d\n",place);
char xx[10];
sprintf(xx,"t%d",place);
struct temp_var *t1=find_temp_var(xx);
if(t1==NULL){
t1=add_temp_var(xx);
}
fprintf(fp,"addi $sp, $sp, -4\nsw $ra, 0($sp)\njal read\nlw $ra, 0($sp)\naddi $sp, $sp, 4\n");
fprintf(fp,"move $t1, $v0\n");
fprintf(fp,"sw $t1, %d($sp)\n",t1->offset);
cd->next=NULL;
return cd;
}
else{
struct intercode* cd=(struct intercode *) malloc(sizeof(struct intercode));
sprintf(cd->content,"t%d := CALL %s\n",place,node[node[x].child[0]].type);
char xx[10];
sprintf(xx,"t%d",place);
fprintf(fp,"addi $sp, $sp, -4\nsw $ra, 0($sp)\n");
trans_jal(node[node[x].child[0]].type,xx);
fprintf(fp,"lw $ra, 0($sp)\naddi $sp, $sp, 4\n");
cd->next=NULL;
return cd;
}
}
else{
struct fun_node *f = lookupFunc(node[node[x].child[0]].type);
arg_len=0;
struct intercode* i1=trans_args(node[x].child[2]);
char str[10];
strcpy(str,i1->content);
if(!strcmp(node[node[x].child[0]].type,"write")){
char xx[10];
int str_len=strlen(str);
int i=0;
while(str[i]!=' '){
xx[i]=str[i];
i++;
}
xx[i]='\0';
struct temp_var *t1=find_temp_var(xx);
if(t1==NULL){
t1=add_temp_var(xx);
}
fprintf(fp,"lw $t1, %d($sp)\n",t1->offset);
fprintf(fp,"move $a0, $t1\n");
fprintf(fp,"addi $sp, $sp, -4\nsw $ra, 0($sp)\njal write\nlw $ra, 0($sp)\naddi $sp, $sp, 4\n");
struct intercode* i2=(struct intercode *) malloc(sizeof(struct intercode));
sprintf(i2->content,"WRITE t%d\n",argList[1]);
i2->next=NULL;
i1=merge(i1,i2);
return i1;
}else{
int i;
for(i=arg_len;i>=1;i--){
struct intercode* i2=(struct intercode *) malloc(sizeof(struct intercode));
sprintf(i2->content,"ARG t%d\n",argList[i]);
char xx[10];
sprintf(xx,"t%d",argList[i]);
struct temp_var *temp=find_temp_var(xx);
fprintf(fp,"lw $t1, %d($sp)\n",temp->offset);
fprintf(fp,"move $a%d, $t1\n",arg_len-i);
i2->next=NULL;
merge(i1,i2);
}
struct intercode* cd3=(struct intercode *) malloc(sizeof(struct intercode));
sprintf(cd3->content,"t%d := CALL %s\n",place,node[node[x].child[0]].type);
char xx[10];
sprintf(xx,"t%d",place);
trans_jal(node[node[x].child[0]].type,xx);
cd3->next=NULL;
i1=merge(i1,cd3);
return i1;
}
}
}else if(strcmp(node[node[x].child[0]].s,"ID")==0){
struct intercode* cd=(struct intercode *) malloc(sizeof(struct intercode));
struct sym_node *temp=lookupSym(varTable,node[node[x].child[0]].type);
sprintf(cd->content,"t%d := v%d\n",place,temp->number);
char xx[10];
char y[10];
sprintf(xx,"t%d",place);
sprintf(y,"v%d",temp->number);
trans_move(xx,y);
cd->next=NULL;
return cd;
}else if(strcmp(node[node[x].child[0]].s,"INT")==0){
struct intercode* cd=(struct intercode *) malloc(sizeof(struct intercode));
sprintf(cd->content,"t%d := #%s\n",place,node[node[x].child[0]].type);
int k=atoi(node[node[x].child[0]].type);
char xx[10];
sprintf(xx,"t%d",place);
trans_li(xx,k);
cd->next=NULL;
return cd;
}else if(strcmp(node[node[x].child[0]].s,"MINUS")==0){
int t1=new_tmp();
struct intercode* i1=trans_exp(node[x].child[0],t1);
struct intercode* i2=(struct intercode *) malloc(sizeof(struct intercode));
sprintf(i2->content,"t%d := #0 - t%d\n",place,t1);
i2->next=NULL;
return merge(i1,i2);
}else if(strcmp(node[node[x].child[1]].s,"STAR")==0){
int t1=new_tmp();
int t2=new_tmp();
struct intercode* i1=trans_exp(node[x].child[0],t1);
struct intercode* i2=trans_exp(node[x].child[2],t2);
struct intercode* cd3=(struct intercode *) malloc(sizeof(struct intercode));
sprintf(cd3->content,"t%d := t%d * t%d\n",place,t1,t2);
char xx[10];
char y[10];
char z[10];
sprintf(xx,"t%d",place);
sprintf(y,"t%d",t1);
sprintf(z,"t%d",t2);
trans_mul(xx,y,z);
cd3->next=NULL;
i1=merge(i1,i2);
i1=merge(i1,cd3);
return i1;
}else if(strcmp(node[node[x].child[1]].s,"PLUS")==0){
int t1=new_tmp();
int t2=new_tmp();
struct intercode* i1=trans_exp(node[x].child[0],t1);
struct intercode* i2=trans_exp(node[x].child[2],t2);
struct intercode* cd3=(struct intercode *) malloc(sizeof(struct intercode));
sprintf(cd3->content,"t%d := t%d + t%d\n",place,t1,t2);
char xx[10];
char y[10];
char z[10];
sprintf(xx,"t%d",place);
sprintf(y,"t%d",t1);
sprintf(z,"t%d",t2);
trans_add(xx,y,z);
cd3->next=NULL;
i1=merge(i1,i2);
i1=merge(i1,cd3);
return i1;
}else if(strcmp(node[node[x].child[1]].s,"MINUS")==0){
int t1=new_tmp();
int t2=new_tmp();
struct intercode* i1=trans_exp(node[x].child[0],t1);
struct intercode* i2=trans_exp(node[x].child[2],t2);
struct intercode* cd3=(struct intercode *) malloc(sizeof(struct intercode));