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Wrap entry point main around the C style main in the IR

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This commit is contained in:
Ginger Bill
2017-09-30 11:20:35 +01:00
parent 8c7cf0dbb0
commit e2b9c87aa8
5 changed files with 191 additions and 95 deletions
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93
src/ir.cpp
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@@ -7276,11 +7276,11 @@ void ir_end_procedure_body(irProcedure *proc) {
void ir_insert_code_before_proc(irProcedure* proc, irProcedure *parent) {
if (parent == nullptr) {
if (proc->name == "main") {
ir_emit_startup_runtime(proc);
}
}
// if (parent == nullptr) {
// if (proc->name == "main") {
// ir_emit_startup_runtime(proc);
// }
// }
}
void ir_build_proc(irValue *value, irProcedure *parent) {
@@ -7728,7 +7728,7 @@ void ir_gen_tree(irGen *s) {
if (e->kind == Entity_Procedure && (e->Procedure.tags & ProcTag_export) != 0) {
} else if (e->kind == Entity_Procedure && e->Procedure.link_name.len > 0) {
// Handle later
} else if (scope->is_init && e->kind == Entity_Procedure && name == "main") {
// } else if (scope->is_init && e->kind == Entity_Procedure && name == "main") {
} else {
name = ir_mangle_name(s, e->token.pos.file, e);
}
@@ -7807,7 +7807,7 @@ void ir_gen_tree(irGen *s) {
#if defined(GB_SYSTEM_WINDOWS)
if (build_context.is_dll && !has_dll_main) {
// proc DllMain(inst: rawptr, reason: u32, reserved: rawptr) -> i32
// DllMain :: proc(inst: rawptr, reason: u32, reserved: rawptr) -> i32
String name = str_lit("DllMain");
Type *proc_params = make_type_tuple(a);
Type *proc_results = make_type_tuple(a);
@@ -7840,7 +7840,7 @@ void ir_gen_tree(irGen *s) {
Entity *e = make_entity_procedure(a, nullptr, make_token_ident(name), proc_type, 0);
irValue *p = ir_value_procedure(a, m, e, proc_type, nullptr, body, name);
map_set(&m->values, hash_pointer(e), p);
map_set(&m->values, hash_entity(e), p);
map_set(&m->members, hash_string(name), p);
irProcedure *proc = &p->Proc;
@@ -7860,12 +7860,10 @@ void ir_gen_tree(irGen *s) {
ir_start_block(proc, then);
{
String main_name = str_lit("main");
irValue **found = map_get(&m->members, hash_string(main_name));
irValue **found = map_get(&m->values, hash_entity(entry_point));
ir_emit(proc, ir_alloc_instr(proc, irInstr_StartupRuntime));
if (found != nullptr) {
ir_emit_call(proc, *found, nullptr, 0);
} else {
ir_emit(proc, ir_alloc_instr(proc, irInstr_StartupRuntime));
}
}
@@ -7878,6 +7876,73 @@ void ir_gen_tree(irGen *s) {
ir_end_procedure_body(proc);
}
#endif
if (!(build_context.is_dll && !has_dll_main)) {
// main :: proc(argc: i32, argv: ^^u8) -> i32
String name = str_lit("main");
Type *proc_params = make_type_tuple(a);
Type *proc_results = make_type_tuple(a);
Scope *proc_scope = gb_alloc_item(a, Scope);
array_init_count(&proc_params->Tuple.variables, a, 2);
array_init_count(&proc_results->Tuple.variables, a, 1);
Type *char_ptr_ptr = make_type_pointer(a, make_type_pointer(a, t_u8));
proc_params->Tuple.variables[0] = make_entity_param(a, proc_scope, make_token_ident(str_lit("argc")), t_i32, false, false);
proc_params->Tuple.variables[1] = make_entity_param(a, proc_scope, make_token_ident(str_lit("argv")), char_ptr_ptr, false, false);
proc_results->Tuple.variables[0] = make_entity_param(a, proc_scope, empty_token, t_i32, false, false);
Type *proc_type = make_type_proc(a, proc_scope,
proc_params, 2,
proc_results, 1, false, ProcCC_C);
// TODO(bill): make this more robust
proc_type->Proc.abi_compat_params = gb_alloc_array(a, Type *, proc_params->Tuple.variables.count);
for_array(i, proc_params->Tuple.variables) {
proc_type->Proc.abi_compat_params[i] = proc_params->Tuple.variables[i]->type;
}
proc_type->Proc.abi_compat_result_type = proc_results->Tuple.variables[0]->type;
AstNode *body = gb_alloc_item(a, AstNode);
Entity *e = make_entity_procedure(a, nullptr, make_token_ident(name), proc_type, 0);
irValue *p = ir_value_procedure(a, m, e, proc_type, nullptr, body, name);
map_set(&m->values, hash_entity(e), p);
map_set(&m->members, hash_string(name), p);
irProcedure *proc = &p->Proc;
proc->tags = ProcTag_no_inline; // TODO(bill): is no_inline a good idea?
e->Procedure.link_name = name;
ir_begin_procedure_body(proc);
// NOTE(bill): https://msdn.microsoft.com/en-us/library/windows/desktop/ms682583(v=vs.85).aspx
// DLL_PROCESS_ATTACH == 1
irValue *argc = ir_emit_load(proc, *map_get(&proc->module->values, hash_entity(proc_params->Tuple.variables[0])));
irValue *argv = ir_emit_load(proc, *map_get(&proc->module->values, hash_entity(proc_params->Tuple.variables[1])));
irValue *global_argc = ir_find_global_variable(proc, str_lit("__argc__"));
irValue *global_argv = ir_find_global_variable(proc, str_lit("__argv__"));
ir_emit_store(proc, global_argc, argc);
ir_emit_store(proc, global_argv, argv);
ir_emit(proc, ir_alloc_instr(proc, irInstr_StartupRuntime));
{
irValue **found = map_get(&proc->module->values, hash_entity(entry_point));
if (found != nullptr) {
ir_emit_call(proc, *found, nullptr, 0);
}
}
ir_emit_return(proc, v_zero32);
ir_end_procedure_body(proc);
}
#if 0 && defined(GB_SYSTEM_WINDOWS)
if (!m->build_context->is_dll && !has_win_main) {
// proc WinMain(inst, prev: rawptr, cmd_line: ^byte, cmd_show: i32) -> i32
@@ -7911,7 +7976,7 @@ void ir_gen_tree(irGen *s) {
m->entry_point_entity = e;
map_set(&m->values, hash_pointer(e), p);
map_set(&m->values, hash_entity(e), p);
map_set(&m->members, hash_string(name), p);
irProcedure *proc = &p->Proc;
@@ -7935,7 +8000,7 @@ void ir_gen_tree(irGen *s) {
Entity *e = make_entity_procedure(a, nullptr, make_token_ident(name), proc_type, 0);
irValue *p = ir_value_procedure(a, m, e, proc_type, nullptr, body, name);
map_set(&m->values, hash_pointer(e), p);
map_set(&m->values, hash_entity(e), p);
map_set(&m->members, hash_string(name), p);