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Basic support for global variables

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This commit is contained in:
gingerBill
2023-07-25 13:56:28 +01:00
parent c6e4b8ed5c
commit e914d551e7
1 changed files with 22 additions and 7 deletions
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src/tilde.cpp
+22 -7
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@@ -267,7 +267,7 @@ struct cgGlobalVariable {
}; };
// Returns already_has_entry_point // Returns already_has_entry_point
gb_internal bool cg_global_variables_create(cgModule *m) { gb_internal bool cg_global_variables_create(cgModule *m, Array<cgGlobalVariable> *global_variables) {
isize global_variable_max_count = 0; isize global_variable_max_count = 0;
bool already_has_entry_point = false; bool already_has_entry_point = false;
@@ -296,7 +296,7 @@ gb_internal bool cg_global_variables_create(cgModule *m) {
} }
} }
} }
auto global_variables = array_make<cgGlobalVariable>(permanent_allocator(), 0, global_variable_max_count); *global_variables = array_make<cgGlobalVariable>(permanent_allocator(), 0, global_variable_max_count);
auto *min_dep_set = &m->info->minimum_dependency_set; auto *min_dep_set = &m->info->minimum_dependency_set;
@@ -358,7 +358,7 @@ gb_internal bool cg_global_variables_create(cgModule *m) {
isize max_regions = cg_global_const_calculate_region_count(tav.value, e->type); isize max_regions = cg_global_const_calculate_region_count(tav.value, e->type);
tb_global_set_storage(m->mod, section, global, type_size_of(e->type), type_align_of(e->type), max_regions); tb_global_set_storage(m->mod, section, global, type_size_of(e->type), type_align_of(e->type), max_regions);
if (tav.mode != Addressing_Invalid && if (tav.mode == Addressing_Constant &&
tav.value.kind != ExactValue_Invalid) { tav.value.kind != ExactValue_Invalid) {
cg_global_const_add_region(m, tav.value, e->type, global, 0); cg_global_const_add_region(m, tav.value, e->type, global, 0);
var.is_initialized = true; var.is_initialized = true;
@@ -367,24 +367,36 @@ gb_internal bool cg_global_variables_create(cgModule *m) {
var.is_initialized = true; var.is_initialized = true;
} }
} else { } else {
var.is_initialized = true;
// TODO(bill): is this even needed;
i64 max_regions = cg_global_const_calculate_region_count_from_basic_type(e->type); i64 max_regions = cg_global_const_calculate_region_count_from_basic_type(e->type);
tb_global_set_storage(m->mod, section, global, type_size_of(e->type), type_align_of(e->type), max_regions); tb_global_set_storage(m->mod, section, global, type_size_of(e->type), type_align_of(e->type), max_regions);
} }
array_add(&global_variables, var); array_add(global_variables, var);
cg_add_symbol(m, e, cast(TB_Symbol *)global); cg_add_symbol(m, e, cast(TB_Symbol *)global);
cg_add_entity(m, e, g); cg_add_entity(m, e, g);
cg_add_member(m, name, g); cg_add_member(m, name, g);
} }
cg_setup_type_info_data(m); cg_setup_type_info_data(m);
return already_has_entry_point; return already_has_entry_point;
} }
gb_internal void cg_global_variables_initialize(cgProcedure *p, Array<cgGlobalVariable> *global_variables) {
for (cgGlobalVariable &var : *global_variables) {
if (var.is_initialized) {
continue;
}
cgValue src = cg_build_expr(p, var.decl->init_expr);
cgValue dst = cg_flatten_value(p, var.var);
cg_emit_store(p, dst, src);
}
}
gb_internal cgModule *cg_module_create(Checker *c) { gb_internal cgModule *cg_module_create(Checker *c) {
cgModule *m = gb_alloc_item(permanent_allocator(), cgModule); cgModule *m = gb_alloc_item(permanent_allocator(), cgModule);
@@ -674,7 +686,8 @@ gb_internal bool cg_generate_code(Checker *c, LinkerData *linker_data) {
TIME_SECTION("Tilde Global Variables"); TIME_SECTION("Tilde Global Variables");
bool already_has_entry_point = cg_global_variables_create(m); Array<cgGlobalVariable> global_variables = {};
bool already_has_entry_point = cg_global_variables_create(m, &global_variables);
gb_unused(already_has_entry_point); gb_unused(already_has_entry_point);
if (true) { if (true) {
@@ -683,6 +696,8 @@ gb_internal bool cg_generate_code(Checker *c, LinkerData *linker_data) {
p->is_startup = true; p->is_startup = true;
cg_procedure_begin(p); cg_procedure_begin(p);
cg_global_variables_initialize(p, &global_variables);
tb_inst_ret(p->func, 0, nullptr); tb_inst_ret(p->func, 0, nullptr);
cg_procedure_end(p); cg_procedure_end(p);
} }