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fix global #57

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Merged
shenao78 merged 1 commit into from
Sep 24, 2021
Merged

fix global #57

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99 changes: 56 additions & 43 deletions compiler/codegen.c
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Original file line number Diff line number Diff line change
Expand Up @@ -109,41 +109,6 @@ fix_opcode_buf(OpcodeBuf *ob)
return ret;
}

static void
add_global_variable(Compiler *compiler, SVM_Executable *exe)
{
Declaration *dl;
int i, var_count = 0;

OpcodeBuf ob;
init_opcode_buf(&ob);
exe->ob_alt = &ob;

for (dl = compiler->declaration_list; dl; dl = dl->next)
{
var_count++;
if (dl->initializer == NULL)
continue;
char *decl_str = dl->initializer->u.str_value;
if (ob.alloc_size < ob.size + 1 + sizeof(decl_str)) {
ob.code = realloc(ob.code, ob.alloc_size + OPCODE_ALLOC_SIZE);
ob.alloc_size += OPCODE_ALLOC_SIZE;
}
ob.code[ob.size] = strdup(decl_str);
ob.size += sizeof(decl_str);
ob.pc++;
}

exe->global_variable_count = var_count;
exe->global_variable = (SVM_Variable *)malloc(sizeof(SVM_Variable) * var_count);

for (dl = compiler->declaration_list, i = 0; dl; dl = dl->next, i++)
{
exe->global_variable[i].name = dl->name;
exe->global_variable[i].type = dl->type;
}
}

static void
generate_builtin_code(OpcodeBuf *ob, SVM_Opcode *ops, int op_cnt)
{
Expand Down Expand Up @@ -173,6 +138,20 @@ generate_code(OpcodeBuf *ob, SVM_Opcode code, ...)
ob->pc++;
}

static void
generate_label_code(OpcodeBuf *ob, int value)
{
if (ob->alloc_size < ob->size + 1 + (JUMP_TARGET_SIZE * 2)) {
ob->code = realloc(ob->code, ob->alloc_size + OPCODE_ALLOC_SIZE);
ob->alloc_size += OPCODE_ALLOC_SIZE;
}
for(int i = 0; i < JUMP_TARGET_SIZE; i++) {
int64_t shift = SHIFT_SIZE * (JUMP_TARGET_SIZE - (i + 1));
ob->code[ob->size++] = SHIFT_OP(value, shift);
}
ob->pc++;
}

static void
generate_immediate_code(OpcodeBuf *ob, int64_t value, int size)
{
Expand All @@ -189,17 +168,51 @@ generate_immediate_code(OpcodeBuf *ob, int64_t value, int size)
}

static void
generate_label_code(OpcodeBuf *ob, int value)
add_global_variable(Compiler *compiler, SVM_Executable *exe)
{
if (ob->alloc_size < ob->size + 1 + (JUMP_TARGET_SIZE * 2)) {
ob->code = realloc(ob->code, ob->alloc_size + OPCODE_ALLOC_SIZE);
ob->alloc_size += OPCODE_ALLOC_SIZE;
Declaration *dl;
int i, var_count = 0;

OpcodeBuf ob;
init_opcode_buf(&ob);
exe->ob_alt = &ob;

for (dl = compiler->declaration_list; dl; dl = dl->next)
{
var_count++;
if (dl->initializer == NULL)
continue;
if(dl->initializer->type->basic_type == INT_TYPE ||
dl->initializer->type->basic_type == AMOUNT_TYPE) {
int64_t value = dl->initializer->u.int_value;
if (value < 2147483648) {
generate_immediate_code(&ob, value, 4);
} else {
generate_immediate_code(&ob, value, 8);
}
} else {
// TODO: other type such as double
char *decl_str = dl->initializer->u.str_value;
if (ob.alloc_size < ob.size + 1 + sizeof(decl_str)) {
ob.code = realloc(ob.code, ob.alloc_size + OPCODE_ALLOC_SIZE);
ob.alloc_size += OPCODE_ALLOC_SIZE;
}
for (int index =0; i< sizeof(decl_str); i++) {
ob.code[ob.size + index] = decl_str[index];
}
ob.size += sizeof(decl_str);
}
ob.pc++;
}
for(int i = 0; i < JUMP_TARGET_SIZE; i++) {
int64_t shift = SHIFT_SIZE * (JUMP_TARGET_SIZE - (i + 1));
ob->code[ob->size++] = SHIFT_OP(value, shift);

exe->global_variable_count = var_count;
exe->global_variable = (SVM_Variable *)malloc(sizeof(SVM_Variable) * var_count);

for (dl = compiler->declaration_list, i = 0; dl; dl = dl->next, i++)
{
exe->global_variable[i].name = dl->name;
exe->global_variable[i].type = dl->type;
}
ob->pc++;
}

static void
Expand Down