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Minimal Dependency Map: Only build what is needed

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This commit is contained in:
Ginger Bill
2016-09-27 15:28:44 +01:00
parent 349badcf17
commit b593332942
18 changed files with 823 additions and 644 deletions
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58
src/codegen/codegen.cpp
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@@ -19,7 +19,7 @@ b32 ssa_gen_init(ssaGen *s, Checker *c) {
s->module.generate_debug_info = false;
// TODO(bill): generate appropriate output name
isize pos = string_extension_position(c->parser->init_fullpath);
int pos = cast(int)string_extension_position(c->parser->init_fullpath);
gbFileError err = gb_file_create(&s->output_file, gb_bprintf("%.*s.ll", pos, c->parser->init_fullpath.text));
if (err != gbFileError_None)
return false;
@@ -59,18 +59,15 @@ String ssa_mangle_name(ssaGen *s, String path, String name) {
isize new_name_len = gb_snprintf(
cast(char *)new_name, max_len,
"%.*s-%u.%.*s",
base_len, base,
cast(int)base_len, base,
file->id,
LIT(name));
return make_string(new_name, new_name_len-1);
}
void ssa_gen_tree(ssaGen *s) {
struct ssaGlobalVariable {
ssaValue *var, *init;
DeclInfo *decl;
};
ssaModule *m = &s->module;
CheckerInfo *info = m->info;
@@ -87,31 +84,46 @@ void ssa_gen_tree(ssaGen *s) {
}
isize global_variable_max_count = 0;
gb_for_array(i, info->entities.entries) {
auto *entry = &info->entities.entries[i];
Entity *e = cast(Entity *)cast(uintptr)entry->key.key;
if (e->kind == Entity_Variable) {
global_variable_max_count++;
}
}
gbTempArenaMemory tmp = gb_temp_arena_memory_begin(&m->tmp_arena);
defer (gb_temp_arena_memory_end(tmp));
gbArray(ssaGlobalVariable) global_variables;
gb_array_init_reserve(global_variables, m->tmp_allocator, global_variable_max_count);
Entity *entry_point = NULL;
gb_for_array(i, info->entities.entries) {
auto *entry = &info->entities.entries[i];
Entity *e = cast(Entity *)cast(uintptr)entry->key.key;
String name = e->token.string;
if (e->kind == Entity_Variable) {
global_variable_max_count++;
} else if (e->kind == Entity_Procedure) {
if (e->scope->is_init && name == "main") {
entry_point = e;
}
}
}
struct ssaGlobalVariable {
ssaValue *var, *init;
DeclInfo *decl;
};
gbArray(ssaGlobalVariable) global_variables;
gb_array_init_reserve(global_variables, m->tmp_allocator, global_variable_max_count);
auto min_dep_map = generate_minimum_dependency_map(info, entry_point);
defer (map_destroy(&min_dep_map));
gb_for_array(i, info->entities.entries) {
auto *entry = &info->entities.entries[i];
Entity *e = cast(Entity *)cast(uintptr)entry->key.key;
String name = e->token.string;
DeclInfo *decl = entry->value;
Scope *scope = e->scope;
if (entry_point != NULL) {
auto found = map_get(&min_dep_map, hash_pointer(e));
if (found == NULL) {
// NOTE(bill): Nothing depends upon it so doesn't need to be built
continue;
}
}
if (!scope->is_global && !scope->is_init) {
name = ssa_mangle_name(s, e->token.pos.file, name);
}