mirror of
https://github.com/open-goal/jak-project
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water111
b59e33c005
* before inserting bonus instruction * first part of refactor for return values * find parent method working
100 lines
3.5 KiB
C++
100 lines
3.5 KiB
C++
#include "expression_build.h"
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#include "decompiler/Function/Function.h"
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#include "decompiler/IR2/Form.h"
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#include "decompiler/IR2/FormStack.h"
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#include "decompiler/util/DecompilerTypeSystem.h"
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namespace decompiler {
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void clean_up_ifs(Form* top_level_form) {
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top_level_form->apply([&](FormElement* elt) {
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auto as_cne = dynamic_cast<CondNoElseElement*>(elt);
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if (!as_cne) {
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return;
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}
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auto top_condition = as_cne->entries.front().condition;
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if (!top_condition->is_single_element() && elt->parent_form) {
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auto real_condition = top_condition->back();
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top_condition->pop_back();
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auto& parent_vector = elt->parent_form->elts();
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// find us in the parent vector
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auto me = std::find_if(parent_vector.begin(), parent_vector.end(),
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[&](FormElement* x) { return x == elt; });
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assert(me != parent_vector.end());
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// now insert the fake condition
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parent_vector.insert(me, top_condition->elts().begin(), top_condition->elts().end());
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top_condition->elts() = {real_condition};
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}
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});
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}
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bool convert_to_expressions(Form* top_level_form,
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FormPool& pool,
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const Function& f,
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const DecompilerTypeSystem& dts) {
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assert(top_level_form);
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try {
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// top_level_form->apply_form([&](Form* form) {
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// if (form == top_level_form || !form->is_single_element()) {
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// FormStack stack;
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// for (auto& entry : form->elts()) {
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// fmt::print("push {} to stack\n", entry->to_form(f.ir2.env).print());
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// entry->push_to_stack(f.ir2.env, pool, stack);
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// }
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// std::vector<FormElement*> new_entries;
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// if (form == top_level_form && f.type.last_arg() != TypeSpec("none")) {
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// new_entries = stack.rewrite_to_get_reg(pool, Register(Reg::GPR, Reg::V0));
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// } else {
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// new_entries = stack.rewrite(pool);
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// }
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// assert(!new_entries.empty());
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// form->clear();
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// for (auto x : new_entries) {
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// form->push_back(x);
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// }
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// }
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// });
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FormStack stack;
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for (auto& entry : top_level_form->elts()) {
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// fmt::print("push {} to stack\n", entry->to_form(f.ir2.env).print());
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entry->push_to_stack(f.ir2.env, pool, stack);
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}
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std::vector<FormElement*> new_entries;
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if (f.type.last_arg() != TypeSpec("none")) {
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auto return_var = f.ir2.atomic_ops->end_op().return_var();
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new_entries = stack.rewrite_to_get_var(pool, return_var, f.ir2.env);
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auto reg_return_type =
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f.ir2.env.get_types_after_op(f.ir2.atomic_ops->ops.size() - 1).get(return_var.reg());
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if (!dts.ts.typecheck(f.type.last_arg(), reg_return_type.typespec(), "", false, false)) {
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// we need to cast the final value.
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auto to_cast = new_entries.back();
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new_entries.pop_back();
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auto cast = pool.alloc_element<CastElement>(f.type.last_arg(),
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pool.alloc_single_form(nullptr, to_cast));
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new_entries.push_back(cast);
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}
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} else {
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new_entries = stack.rewrite(pool);
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}
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assert(!new_entries.empty());
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top_level_form->clear();
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for (auto x : new_entries) {
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top_level_form->push_back(x);
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}
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// fix up stuff
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clean_up_ifs(top_level_form);
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} catch (std::exception& e) {
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lg::warn("Expression building failed: {}", e.what());
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return false;
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}
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return true;
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}
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} // namespace decompiler
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