mirror of
https://github.com/open-goal/jak-project.git
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917 lines
34 KiB
C++
917 lines
34 KiB
C++
#pragma once
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#include <optional>
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#include <string>
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#include <utility>
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#include "Env.h"
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#include "common/goos/Object.h"
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#include "common/util/Assert.h"
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#include "decompiler/Disasm/Instruction.h"
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#include "decompiler/Disasm/Register.h"
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#include "decompiler/IR2/IR2_common.h"
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#include "decompiler/util/MatchParam.h"
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namespace decompiler {
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class FormElement;
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class ConditionElement;
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class FormPool;
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class DecompilerTypeSystem;
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namespace types2 {
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struct Instruction;
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struct TypeState;
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struct TypePropExtras;
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} // namespace types2
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/*!
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* An atomic operation represents a single operation from the point of view of the IR2 system.
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* Each IR2 op is one or more instructions.
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* Each function can be represented as a list of AtomicOps. These are stored in exactly the same
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* order as the instructions appear.
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*
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* The AtomicOps use SimpleAtom and SimpleExpression. These are extremely limited versions of
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* the full IR2 expression system, but are much easier to work with because they are less general
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* and can't be nested infinitely. They also have features specific to the AtomicOp system that are
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* not required for full expressions. The full expression system will later convert these into the
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* more complicated expressions.
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*
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* The types of AtomicOp are:
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* ConditionalMoveFalseOp
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* CallOp
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* SpecialOp
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* BranchOp
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* LoadVarOp
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* StoreOp
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* SetVarConditionOp
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* AsmOp
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* SetVarExprOp
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* FunctionEndOp
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*/
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class AtomicOp {
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public:
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explicit AtomicOp(int my_idx);
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std::string to_string(const std::vector<DecompilerLabel>& labels, const Env& env) const;
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std::string to_string(const Env& env) const;
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std::string reg_type_info_as_string(const TypeState& init_types,
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const TypeState& end_types) const;
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virtual goos::Object to_form(const std::vector<DecompilerLabel>& labels,
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const Env& env) const = 0;
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virtual bool operator==(const AtomicOp& other) const = 0;
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bool operator!=(const AtomicOp& other) const;
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// determine if this is a GOAL "sequence point".
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// non-sequence point instructions may be out of order from the point of view of the expression
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// stack.
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virtual bool is_sequence_point() const = 0;
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// get the variable being set by this operation. Only call this if is_variable_set returns true.
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virtual RegisterAccess get_set_destination() const = 0;
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// convert me to an expression. If I'm a set!, this will produce a (set! x y), which may be
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// undesirable when expression stacking.
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virtual FormElement* get_as_form(FormPool& pool, const Env& env) const = 0;
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// figure out what registers are read and written in this AtomicOp and update read_regs,
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// write_regs, and clobber_regs. It's expected that these have duplicates if a register appears
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// in the original instructions multiple times. Ex: "and v0, v1, v1" would end up putting v1 in
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// read twice.
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virtual void update_register_info() = 0;
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virtual void collect_vars(RegAccessSet& vars) const = 0;
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TypeState propagate_types(const TypeState& input, const Env& env, DecompilerTypeSystem& dts);
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virtual void propagate_types2(types2::Instruction& instr,
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const Env& env,
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types2::TypeState& input_types,
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DecompilerTypeSystem& dts,
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types2::TypePropExtras& extras) = 0;
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int op_id() const { return m_my_idx; }
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const std::vector<Register>& read_regs() const { return m_read_regs; }
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const std::vector<Register>& write_regs() const { return m_write_regs; }
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const std::vector<Register>& clobber_regs() const { return m_clobber_regs; }
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void add_clobber_reg(Register r) { m_clobber_regs.push_back(r); }
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void clear_register_info() {
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m_read_regs.clear();
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m_write_regs.clear();
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m_clobber_regs.clear();
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}
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virtual ~AtomicOp() = default;
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protected:
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int m_my_idx = -1;
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// given the input types of all registers, figure out the output types.
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virtual TypeState propagate_types_internal(const TypeState& input,
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const Env& env,
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DecompilerTypeSystem& dts) = 0;
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void clobber_temps();
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// the register values that are read (at the start of this op)
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std::vector<Register> m_read_regs;
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// the registers that have actual values written into them (at the end of this op)
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std::vector<Register> m_write_regs;
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// the registers which have junk written into them.
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std::vector<Register> m_clobber_regs;
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};
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class SimpleExpression;
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/*!
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* The has a value. In some cases it can be set.
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*/
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class SimpleAtom {
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public:
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enum class Kind : u8 {
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VARIABLE,
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INTEGER_CONSTANT,
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SYMBOL_PTR,
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SYMBOL_VAL,
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SYMBOL_VAL_PTR,
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EMPTY_LIST,
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STATIC_ADDRESS,
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INVALID
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};
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SimpleAtom() = default;
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static SimpleAtom make_var(const RegisterAccess& var);
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static SimpleAtom make_sym_ptr(const std::string& name);
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static SimpleAtom make_sym_val(const std::string& name);
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static SimpleAtom make_sym_val_ptr(const std::string& name);
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static SimpleAtom make_empty_list();
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static SimpleAtom make_int_constant(s64 value);
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static SimpleAtom make_static_address(int static_label_id);
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goos::Object to_form(const std::vector<DecompilerLabel>& labels, const Env& env) const;
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goos::Object to_form(const Env& env) const;
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std::string to_string(const Env& env) const;
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void collect_vars(RegAccessSet& vars) const;
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bool is_var() const { return m_kind == Kind::VARIABLE; }
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bool is_label() const { return m_kind == Kind::STATIC_ADDRESS; }
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const RegisterAccess& var() const {
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ASSERT(is_var());
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return m_variable;
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}
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int label() const {
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ASSERT(is_label());
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return m_int;
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}
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s64 get_int() const {
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ASSERT(is_int());
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return m_int;
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}
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bool is_int() const { return m_kind == Kind::INTEGER_CONSTANT; };
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bool is_int(s64 integer) const { return is_int() && get_int() == integer; }
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bool is_sym_ptr() const { return m_kind == Kind::SYMBOL_PTR; };
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bool is_sym_ptr(const std::string& str) const {
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return m_kind == Kind::SYMBOL_PTR && m_string == str;
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}
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bool is_sym_val() const { return m_kind == Kind::SYMBOL_VAL; };
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bool is_sym_val(const std::string& str) const {
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return m_kind == Kind::SYMBOL_VAL && m_string == str;
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}
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bool is_sym_val_ptr() const { return m_kind == Kind::SYMBOL_VAL_PTR; };
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bool is_empty_list() const { return m_kind == Kind::EMPTY_LIST; };
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bool is_static_addr() const { return m_kind == Kind::STATIC_ADDRESS; };
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Kind get_kind() const { return m_kind; }
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bool operator==(const SimpleAtom& other) const;
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bool operator!=(const SimpleAtom& other) const { return !((*this) == other); }
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void get_regs(std::vector<Register>* out) const;
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SimpleExpression as_expr() const;
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TP_Type get_type(const TypeState& input, const Env& env, const DecompilerTypeSystem& dts) const;
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const std::string& get_str() const {
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ASSERT(is_sym_ptr() || is_sym_val() || is_sym_val_ptr());
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return m_string;
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}
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void mark_as_float();
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bool is_integer_promoted_to_float() const;
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float get_integer_promoted_to_float() const;
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private:
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Kind m_kind = Kind::INVALID;
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std::string m_string; // for symbol ptr and symbol val
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s64 m_int = -1; // for integer constant and static address label id
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RegisterAccess m_variable;
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bool m_display_int_as_float = false;
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};
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/*!
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* A "simple expression" can be used within an AtomicOp.
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* AtomicOps are often made up of very few instructions, so these expressions are quite simple and
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* can't nest. There is an "operation" and some arguments. There are no side effects of a
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* SimpleExpression. The side effects will be captured by the AtomicOp.
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*
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* Note - there is an expression kind called identity which takes one argument and uses that
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* argument as an expression.
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*/
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class SimpleExpression {
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public:
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enum class Kind : u8 {
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INVALID,
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IDENTITY,
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DIV_S,
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MUL_S,
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ADD_S,
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SUB_S,
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MIN_S,
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MAX_S,
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FLOAT_TO_INT,
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INT_TO_FLOAT,
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ABS_S,
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NEG_S,
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SQRT_S,
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ADD,
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SUB,
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MUL_SIGNED,
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DIV_SIGNED,
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MOD_SIGNED,
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DIV_UNSIGNED,
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MOD_UNSIGNED,
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OR,
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AND,
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NOR,
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XOR,
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LEFT_SHIFT,
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RIGHT_SHIFT_ARITH,
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RIGHT_SHIFT_LOGIC,
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MUL_UNSIGNED,
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LOGNOT,
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NEG,
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GPR_TO_FPR,
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FPR_TO_GPR,
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MIN_SIGNED,
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MAX_SIGNED,
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MIN_UNSIGNED,
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MAX_UNSIGNED,
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PCPYLD,
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VECTOR_PLUS,
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VECTOR_MINUS,
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VECTOR_FLOAT_PRODUCT,
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VECTOR_CROSS,
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SUBU_L32_S7, // use SUBU X, src0, s7 to check if lower 32-bits are s7.
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VECTOR_3_DOT,
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VECTOR_4_DOT,
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VECTOR_LENGTH, // jak 2 only.
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VECTOR_PLUS_FLOAT_TIMES, // jak 2 only.
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SET_ON_LESS_THAN,
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SET_ON_LESS_THAN_IMM
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};
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// how many arguments?
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int args() const { return n_args; }
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const SimpleAtom& get_arg(int idx) const {
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ASSERT(idx < args());
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return m_args[idx];
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}
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SimpleAtom& get_arg(int idx) {
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ASSERT(idx < args());
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return m_args[idx];
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}
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Kind kind() const { return m_kind; }
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SimpleExpression() = default;
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SimpleExpression(Kind kind, const SimpleAtom& arg0);
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SimpleExpression(Kind kind, const SimpleAtom& arg0, const SimpleAtom& arg1);
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SimpleExpression(Kind kind,
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const SimpleAtom& arg0,
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const SimpleAtom& arg1,
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const SimpleAtom& arg2);
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SimpleExpression(Kind kind,
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const SimpleAtom& arg0,
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const SimpleAtom& arg1,
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const SimpleAtom& arg2,
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const SimpleAtom& arg3);
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goos::Object to_form(const std::vector<DecompilerLabel>& labels, const Env& env) const;
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std::string to_string(const Env& env) const;
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bool operator==(const SimpleExpression& other) const;
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bool is_identity() const { return m_kind == Kind::IDENTITY; }
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bool is_var() const { return is_identity() && get_arg(0).is_var(); }
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const RegisterAccess& var() const {
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ASSERT(is_var());
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return get_arg(0).var();
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}
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void get_regs(std::vector<Register>* out) const;
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TP_Type get_type(const TypeState& input, const Env& env, const DecompilerTypeSystem& dts) const;
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TP_Type get_type_int2(const TypeState& input,
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const Env& env,
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const DecompilerTypeSystem& dts) const;
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TP_Type get_type_int1(const TypeState& input,
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const Env& env,
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const DecompilerTypeSystem& dts) const;
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void collect_vars(RegAccessSet& vars) const;
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private:
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Kind m_kind = Kind::INVALID;
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SimpleAtom m_args[4];
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s8 n_args = -1;
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};
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int get_simple_expression_arg_count(SimpleExpression::Kind kind);
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/*!
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* Set a variable equal to a Simple Expression
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*/
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class SetVarOp : public AtomicOp {
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public:
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SetVarOp(const RegisterAccess& dst, SimpleExpression src, int my_idx)
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: AtomicOp(my_idx), m_dst(dst), m_src(std::move(src)) {
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ASSERT(my_idx == dst.idx());
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}
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virtual goos::Object to_form(const std::vector<DecompilerLabel>& labels,
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const Env& env) const override;
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bool operator==(const AtomicOp& other) const override;
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bool is_sequence_point() const override;
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RegisterAccess get_set_destination() const override;
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FormElement* get_as_form(FormPool& pool, const Env& env) const override;
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void update_register_info() override;
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TypeState propagate_types_internal(const TypeState& input,
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const Env& env,
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DecompilerTypeSystem& dts) override;
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void propagate_types2(types2::Instruction& instr,
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const Env& env,
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types2::TypeState& input_types,
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DecompilerTypeSystem& dts,
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types2::TypePropExtras& extras) override;
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void collect_vars(RegAccessSet& vars) const override;
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const RegisterAccess& dst() const { return m_dst; }
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const SimpleExpression& src() const { return m_src; }
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private:
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RegisterAccess m_dst;
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SimpleExpression m_src;
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std::optional<TypeSpec> m_source_type;
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};
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/*!
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* An AsmOp represents a single inline assembly instruction. This is used when the BasicOpBuilder
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* pass decides that an instruction could not have been generated from high-level GOAL code, and
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* instead must be due to inline assembly.
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*
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* Each AsmOp stores the instruction it uses, as well as "Variable"s for each register used.
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*/
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class AsmOp : public AtomicOp {
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public:
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AsmOp(Instruction instr, int my_idx);
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goos::Object to_form(const std::vector<DecompilerLabel>& labels, const Env& env) const override;
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goos::Object to_open_goal_form(const std::vector<DecompilerLabel>& labels, const Env& env) const;
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bool operator==(const AtomicOp& other) const override;
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bool is_sequence_point() const override;
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RegisterAccess get_set_destination() const override;
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FormElement* get_as_form(FormPool& pool, const Env& env) const override;
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void update_register_info() override;
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TypeState propagate_types_internal(const TypeState& input,
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const Env& env,
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DecompilerTypeSystem& dts) override;
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void propagate_types2(types2::Instruction& instr,
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const Env& env,
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types2::TypeState& input_types,
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DecompilerTypeSystem& dts,
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types2::TypePropExtras& extras) override;
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void collect_vars(RegAccessSet& vars) const override;
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const Instruction& instruction() const { return m_instr; }
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const std::optional<RegisterAccess> dst() const { return m_dst; }
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const std::optional<RegisterAccess> src(int i) const {
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ASSERT(i < 4);
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return m_src[i];
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}
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private:
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Instruction m_instr;
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std::optional<RegisterAccess> m_dst;
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std::optional<RegisterAccess> m_src[4];
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};
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/*!
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* A condition represents something that can generate a 0 or 1 based on a check or comparison.
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* This can be used as a branch condition in BranchOp
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* This can be used as a condition in an SetVarConditionOp, which sets a variable to a GOAL boolean.
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* Sometimes a SetVarConditionOp gets spread across many many instructions, in which case it is
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* not correctly detected here.
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*/
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class IR2_Condition {
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public:
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enum class Kind {
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NOT_EQUAL,
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EQUAL,
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LESS_THAN_SIGNED,
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GREATER_THAN_SIGNED,
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LEQ_SIGNED,
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GEQ_SIGNED,
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GREATER_THAN_ZERO_SIGNED,
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GREATER_THAN_ZERO_UNSIGNED,
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LEQ_ZERO_SIGNED,
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LEQ_ZERO_UNSIGNED,
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LESS_THAN_ZERO_SIGNED,
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GEQ_ZERO_SIGNED,
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LESS_THAN_ZERO_UNSIGNED,
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GEQ_ZERO_UNSIGNED,
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LESS_THAN_UNSIGNED,
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GREATER_THAN_UNSIGNED,
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LEQ_UNSIGNED,
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GEQ_UNSIGNED,
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ZERO,
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NONZERO,
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FALSE,
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TRUTHY,
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ALWAYS,
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NEVER,
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FLOAT_EQUAL,
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FLOAT_NOT_EQUAL,
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FLOAT_LESS_THAN,
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FLOAT_GEQ,
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FLOAT_LEQ,
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FLOAT_GREATER_THAN,
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IS_PAIR,
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IS_NOT_PAIR,
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INVALID
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};
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IR2_Condition() = default;
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explicit IR2_Condition(Kind kind);
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IR2_Condition(Kind kind, const SimpleAtom& src0);
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IR2_Condition(Kind kind, const SimpleAtom& src0, const SimpleAtom& src1);
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void invert();
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bool operator==(const IR2_Condition& other) const;
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bool operator!=(const IR2_Condition& other) const { return !((*this) == other); }
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goos::Object to_form(const std::vector<DecompilerLabel>& labels, const Env& env) const;
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void get_regs(std::vector<Register>* out) const;
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Kind kind() const { return m_kind; }
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const SimpleAtom& src(int i) const { return m_src[i]; }
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ConditionElement* get_as_form(FormPool& pool, const Env& env, int my_idx) const;
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void collect_vars(RegAccessSet& vars) const;
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void make_flipped() { m_flipped_eval = true; }
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bool flipped() const { return m_flipped_eval; }
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private:
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Kind m_kind = Kind::INVALID;
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SimpleAtom m_src[2];
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bool m_flipped_eval = false;
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};
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std::string get_condition_kind_name(IR2_Condition::Kind kind);
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int get_condition_num_args(IR2_Condition::Kind kind);
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IR2_Condition::Kind get_condition_opposite(IR2_Condition::Kind kind);
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bool condition_uses_float(IR2_Condition::Kind kind);
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/*!
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* Set a variable to a GOAL boolean, based off of a condition.
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*/
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class SetVarConditionOp : public AtomicOp {
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public:
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SetVarConditionOp(RegisterAccess dst, IR2_Condition condition, int my_idx);
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goos::Object to_form(const std::vector<DecompilerLabel>& labels, const Env& env) const override;
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bool operator==(const AtomicOp& other) const override;
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bool is_sequence_point() const override;
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RegisterAccess get_set_destination() const override;
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FormElement* get_as_form(FormPool& pool, const Env& env) const override;
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void update_register_info() override;
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void invert() { m_condition.invert(); }
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TypeState propagate_types_internal(const TypeState& input,
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const Env& env,
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|
DecompilerTypeSystem& dts) override;
|
|
void propagate_types2(types2::Instruction& instr,
|
|
const Env& env,
|
|
types2::TypeState& input_types,
|
|
DecompilerTypeSystem& dts,
|
|
types2::TypePropExtras& extras) override;
|
|
void collect_vars(RegAccessSet& vars) const override;
|
|
|
|
private:
|
|
RegisterAccess m_dst;
|
|
IR2_Condition m_condition;
|
|
};
|
|
|
|
/*!
|
|
* Store an Atom into a memory location.
|
|
* Note - this is _not_ considered a set! form because you are not setting the value of a
|
|
* register which can be expression-compacted.
|
|
*/
|
|
class StoreOp : public AtomicOp {
|
|
public:
|
|
enum class Kind { INTEGER, FLOAT, VECTOR_FLOAT, INVALID };
|
|
StoreOp(int size, Kind kind, SimpleExpression addr, SimpleAtom value, int my_idx);
|
|
goos::Object to_form(const std::vector<DecompilerLabel>& labels, const Env& env) const override;
|
|
bool operator==(const AtomicOp& other) const override;
|
|
bool is_sequence_point() const override;
|
|
RegisterAccess get_set_destination() const override;
|
|
FormElement* get_as_form(FormPool& pool, const Env& env) const override;
|
|
FormElement* get_vf_store_as_form(FormPool& pool, const Env& env) const;
|
|
void update_register_info() override;
|
|
TypeState propagate_types_internal(const TypeState& input,
|
|
const Env& env,
|
|
DecompilerTypeSystem& dts) override;
|
|
void propagate_types2(types2::Instruction& instr,
|
|
const Env& env,
|
|
types2::TypeState& input_types,
|
|
DecompilerTypeSystem& dts,
|
|
types2::TypePropExtras& extras) override;
|
|
void collect_vars(RegAccessSet& vars) const override;
|
|
const SimpleExpression& addr() const { return m_addr; }
|
|
const SimpleAtom& value() const { return m_value; }
|
|
Kind kind() const { return m_kind; }
|
|
int store_size() const { return m_size; }
|
|
|
|
private:
|
|
int m_size;
|
|
Kind m_kind = Kind::INVALID;
|
|
SimpleExpression m_addr;
|
|
SimpleAtom m_value;
|
|
};
|
|
|
|
/*!
|
|
* Load a value into a variable.
|
|
* This is treated as a set! form.
|
|
*/
|
|
class LoadVarOp : public AtomicOp {
|
|
public:
|
|
enum class Kind { UNSIGNED, SIGNED, FLOAT, VECTOR_FLOAT, INVALID };
|
|
LoadVarOp(Kind kind, int size, RegisterAccess dst, SimpleExpression src, int my_idx);
|
|
goos::Object to_form(const std::vector<DecompilerLabel>& labels, const Env& env) const override;
|
|
bool operator==(const AtomicOp& other) const override;
|
|
bool is_sequence_point() const override;
|
|
RegisterAccess get_set_destination() const override;
|
|
FormElement* get_as_form(FormPool& pool, const Env& env) const override;
|
|
Form* get_load_src(FormPool& pool, const Env& env) const;
|
|
void update_register_info() override;
|
|
TypeState propagate_types_internal(const TypeState& input,
|
|
const Env& env,
|
|
DecompilerTypeSystem& dts) override;
|
|
void propagate_types2(types2::Instruction& instr,
|
|
const Env& env,
|
|
types2::TypeState& input_types,
|
|
DecompilerTypeSystem& dts,
|
|
types2::TypePropExtras& extras) override;
|
|
TP_Type get_src_type(const TypeState& input, const Env& env, DecompilerTypeSystem& dts) const;
|
|
void collect_vars(RegAccessSet& vars) const override;
|
|
const SimpleExpression& src() const { return m_src; }
|
|
Kind kind() const { return m_kind; }
|
|
int size() const { return m_size; }
|
|
|
|
private:
|
|
Kind m_kind;
|
|
int m_size = -1;
|
|
RegisterAccess m_dst;
|
|
SimpleExpression m_src;
|
|
std::optional<TypeSpec> m_type;
|
|
};
|
|
|
|
std::string load_kind_to_string(LoadVarOp::Kind kind);
|
|
FormElement* make_label_load(int label_idx,
|
|
const Env& env,
|
|
FormPool& pool,
|
|
int load_size,
|
|
LoadVarOp::Kind load_kind);
|
|
|
|
/*!
|
|
* This represents one of the possible instructions that can go in a branch delay slot.
|
|
* These will be "absorbed" into higher level structures, but for the purpose of printing AtomicOps,
|
|
* it will be nice to have these print like expressions.
|
|
*
|
|
* These are always part of the branch op.
|
|
*/
|
|
class IR2_BranchDelay {
|
|
public:
|
|
enum class Kind {
|
|
NOP,
|
|
SET_REG_FALSE,
|
|
SET_REG_TRUE,
|
|
SET_REG_REG,
|
|
SET_BINTEGER,
|
|
SET_PAIR,
|
|
DSLLV,
|
|
NEGATE,
|
|
NO_DELAY,
|
|
UNKNOWN
|
|
};
|
|
|
|
explicit IR2_BranchDelay(Kind kind);
|
|
IR2_BranchDelay(Kind kind, RegisterAccess var0);
|
|
IR2_BranchDelay(Kind kind, RegisterAccess var0, RegisterAccess var1);
|
|
IR2_BranchDelay(Kind kind, RegisterAccess var0, RegisterAccess var1, RegisterAccess var2);
|
|
goos::Object to_form(const std::vector<DecompilerLabel>& labels, const Env& env) const;
|
|
bool operator==(const IR2_BranchDelay& other) const;
|
|
void get_regs(std::vector<Register>* write, std::vector<Register>* read) const;
|
|
bool is_known() const { return m_kind != Kind::UNKNOWN; }
|
|
TypeState propagate_types(const TypeState& input,
|
|
const Env& env,
|
|
DecompilerTypeSystem& dts) const;
|
|
void collect_vars(RegAccessSet& vars) const;
|
|
Kind kind() const { return m_kind; }
|
|
const RegisterAccess& var(int idx) const {
|
|
ASSERT(idx < 3);
|
|
ASSERT(m_var[idx].has_value());
|
|
return m_var[idx].value();
|
|
}
|
|
|
|
private:
|
|
std::optional<RegisterAccess> m_var[3];
|
|
Kind m_kind = Kind::UNKNOWN;
|
|
};
|
|
|
|
/*!
|
|
* This represents a combination of a condition + a branch + the branch delay slot.
|
|
* This is considered as a single operation.
|
|
*/
|
|
class BranchOp : public AtomicOp {
|
|
public:
|
|
BranchOp(bool likely,
|
|
IR2_Condition condition,
|
|
int label,
|
|
IR2_BranchDelay branch_delay,
|
|
int my_idx);
|
|
goos::Object to_form(const std::vector<DecompilerLabel>& labels, const Env& env) const override;
|
|
bool operator==(const AtomicOp& other) const override;
|
|
bool is_sequence_point() const override;
|
|
RegisterAccess get_set_destination() const override;
|
|
FormElement* get_as_form(FormPool& pool, const Env& env) const override;
|
|
void update_register_info() override;
|
|
TypeState propagate_types_internal(const TypeState& input,
|
|
const Env& env,
|
|
DecompilerTypeSystem& dts) override;
|
|
void propagate_types2(types2::Instruction& instr,
|
|
const Env& env,
|
|
types2::TypeState& input_types,
|
|
DecompilerTypeSystem& dts,
|
|
types2::TypePropExtras& extras) override;
|
|
void collect_vars(RegAccessSet& vars) const override;
|
|
const IR2_BranchDelay& branch_delay() const { return m_branch_delay; }
|
|
const IR2_Condition& condition() const { return m_condition; }
|
|
ConditionElement* get_condition_as_form(FormPool& pool, const Env& env) const;
|
|
bool likely() const { return m_likely; }
|
|
int label_id() const { return m_label; }
|
|
|
|
private:
|
|
bool m_likely = false;
|
|
IR2_Condition m_condition;
|
|
int m_label = -1;
|
|
IR2_BranchDelay m_branch_delay;
|
|
};
|
|
|
|
/*!
|
|
* This represents an unknown branch instruction that we think was generated from inline assembly
|
|
*/
|
|
class AsmBranchOp : public AtomicOp {
|
|
public:
|
|
AsmBranchOp(bool likely, IR2_Condition condition, int label, AtomicOp* branch_delay, int my_idx);
|
|
|
|
AsmBranchOp(bool likely,
|
|
IR2_Condition condition,
|
|
int label,
|
|
std::shared_ptr<AtomicOp> branch_delay,
|
|
int my_idx);
|
|
|
|
goos::Object to_form(const std::vector<DecompilerLabel>& labels, const Env& env) const override;
|
|
bool operator==(const AtomicOp& other) const override;
|
|
bool is_sequence_point() const override;
|
|
RegisterAccess get_set_destination() const override;
|
|
FormElement* get_as_form(FormPool& pool, const Env& env) const override;
|
|
void update_register_info() override;
|
|
TypeState propagate_types_internal(const TypeState& input,
|
|
const Env& env,
|
|
DecompilerTypeSystem& dts) override;
|
|
void propagate_types2(types2::Instruction& instr,
|
|
const Env& env,
|
|
types2::TypeState& input_types,
|
|
DecompilerTypeSystem& dts,
|
|
types2::TypePropExtras& extras) override;
|
|
void collect_vars(RegAccessSet& vars) const override;
|
|
bool is_likely() const { return m_likely; }
|
|
const IR2_Condition& condition() const { return m_condition; }
|
|
int label_id() const { return m_label; }
|
|
AtomicOp* branch_delay() { return m_branch_delay; }
|
|
|
|
private:
|
|
bool m_likely = false;
|
|
IR2_Condition m_condition;
|
|
int m_label = -1;
|
|
AtomicOp* m_branch_delay;
|
|
std::shared_ptr<AtomicOp> m_branch_delay_sp;
|
|
};
|
|
|
|
/*!
|
|
* A "special" op has no arguments.
|
|
* NOP, BREAK, SUSPEND,
|
|
*/
|
|
class SpecialOp : public AtomicOp {
|
|
public:
|
|
enum class Kind {
|
|
NOP,
|
|
BREAK,
|
|
CRASH,
|
|
SUSPEND,
|
|
};
|
|
|
|
SpecialOp(Kind kind, int my_idx);
|
|
goos::Object to_form(const std::vector<DecompilerLabel>& labels, const Env& env) const override;
|
|
bool operator==(const AtomicOp& other) const override;
|
|
bool is_sequence_point() const override;
|
|
RegisterAccess get_set_destination() const override;
|
|
FormElement* get_as_form(FormPool& pool, const Env& env) const override;
|
|
void update_register_info() override;
|
|
TypeState propagate_types_internal(const TypeState& input,
|
|
const Env& env,
|
|
DecompilerTypeSystem& dts) override;
|
|
void propagate_types2(types2::Instruction& instr,
|
|
const Env& env,
|
|
types2::TypeState& input_types,
|
|
DecompilerTypeSystem& dts,
|
|
types2::TypePropExtras& extras) override;
|
|
void collect_vars(RegAccessSet& vars) const override;
|
|
Kind kind() const { return m_kind; }
|
|
|
|
private:
|
|
Kind m_kind;
|
|
};
|
|
|
|
/*!
|
|
* Represents a function call.
|
|
* This has so many special cases and exceptions that it is separate from SpecialOp.
|
|
*/
|
|
class CallOp : public AtomicOp {
|
|
public:
|
|
explicit CallOp(int my_idx);
|
|
goos::Object to_form(const std::vector<DecompilerLabel>& labels, const Env& env) const override;
|
|
bool operator==(const AtomicOp& other) const override;
|
|
bool is_sequence_point() const override;
|
|
RegisterAccess get_set_destination() const override;
|
|
FormElement* get_as_form(FormPool& pool, const Env& env) const override;
|
|
void update_register_info() override;
|
|
TypeState propagate_types_internal(const TypeState& input,
|
|
const Env& env,
|
|
DecompilerTypeSystem& dts) override;
|
|
void propagate_types2(types2::Instruction& instr,
|
|
const Env& env,
|
|
types2::TypeState& input_types,
|
|
DecompilerTypeSystem& dts,
|
|
types2::TypePropExtras& extras) override;
|
|
void collect_vars(RegAccessSet& vars) const override;
|
|
const std::vector<RegisterAccess>& arg_vars() const { return m_arg_vars; }
|
|
RegisterAccess function_var() const { return m_function_var; }
|
|
|
|
protected:
|
|
TypeSpec m_call_type;
|
|
bool m_call_type_set = false;
|
|
|
|
std::vector<RegisterAccess> m_arg_vars;
|
|
RegisterAccess m_function_var;
|
|
RegisterAccess m_return_var;
|
|
};
|
|
|
|
/*!
|
|
* Unfortunately the original GOAL compiler does something weird when compiling (zero? x) or (not
|
|
* (zero? x)) when the result needs to be stored in a GOAL boolean (not in a branch condition). It
|
|
* first does a (set! result #t), then (possibly) a bunch of code to evaluate x, then does a
|
|
* conditional move (movn/movz). As a result, we can't recognize this as a Condition in the
|
|
* AtomicOp pass. Instead we'll recognize it as a (set! result #t) .... (cmove result flag) where
|
|
* flag is checked to be 0 or not. It's weird because all of the other similar cases get this
|
|
* right.
|
|
*
|
|
* Note - this isn't considered a variable set. It's "conditional set" so it needs to be
|
|
* handled separately. Unfortunately.
|
|
*/
|
|
class ConditionalMoveFalseOp : public AtomicOp {
|
|
public:
|
|
ConditionalMoveFalseOp(RegisterAccess dst,
|
|
RegisterAccess src,
|
|
RegisterAccess old_value,
|
|
bool on_zero,
|
|
int my_idx);
|
|
goos::Object to_form(const std::vector<DecompilerLabel>& labels, const Env& env) const override;
|
|
bool operator==(const AtomicOp& other) const override;
|
|
bool is_sequence_point() const override;
|
|
RegisterAccess get_set_destination() const override;
|
|
FormElement* get_as_form(FormPool& pool, const Env& env) const override;
|
|
void update_register_info() override;
|
|
TypeState propagate_types_internal(const TypeState& input,
|
|
const Env& env,
|
|
DecompilerTypeSystem& dts) override;
|
|
void propagate_types2(types2::Instruction& instr,
|
|
const Env& env,
|
|
types2::TypeState& input_types,
|
|
DecompilerTypeSystem& dts,
|
|
types2::TypePropExtras& extras) override;
|
|
void collect_vars(RegAccessSet& vars) const override;
|
|
|
|
private:
|
|
RegisterAccess m_dst, m_src, m_old_value;
|
|
bool m_on_zero;
|
|
};
|
|
|
|
struct IR2_RegOffset {
|
|
Register reg;
|
|
RegisterAccess var;
|
|
int offset;
|
|
};
|
|
|
|
/*!
|
|
* An extra operation inserted at the very end of a function.
|
|
* It "reads" the return register V0.
|
|
* During type analysis, call "mark_function_as_no_return_value" to update the register info if
|
|
* we learn that this function does not return a value.
|
|
*/
|
|
class FunctionEndOp : public AtomicOp {
|
|
public:
|
|
explicit FunctionEndOp(int my_idx);
|
|
goos::Object to_form(const std::vector<DecompilerLabel>& labels, const Env& env) const override;
|
|
bool operator==(const AtomicOp& other) const override;
|
|
bool is_sequence_point() const override;
|
|
RegisterAccess get_set_destination() const override;
|
|
FormElement* get_as_form(FormPool& pool, const Env& env) const override;
|
|
void update_register_info() override;
|
|
TypeState propagate_types_internal(const TypeState& input,
|
|
const Env& env,
|
|
DecompilerTypeSystem& dts) override;
|
|
void propagate_types2(types2::Instruction& instr,
|
|
const Env& env,
|
|
types2::TypeState& input_types,
|
|
DecompilerTypeSystem& dts,
|
|
types2::TypePropExtras& extras) override;
|
|
void collect_vars(RegAccessSet& vars) const override;
|
|
void mark_function_as_no_return_value();
|
|
const RegisterAccess& return_var() const {
|
|
ASSERT(m_function_has_return_value);
|
|
return m_return_reg;
|
|
}
|
|
|
|
private:
|
|
bool m_function_has_return_value = true;
|
|
RegisterAccess m_return_reg;
|
|
};
|
|
|
|
/*!
|
|
* An operation to store a variable from the stack.
|
|
*/
|
|
class StackSpillStoreOp : public AtomicOp {
|
|
public:
|
|
StackSpillStoreOp(const SimpleAtom& value, int size, int offset, int my_idx);
|
|
goos::Object to_form(const std::vector<DecompilerLabel>& labels, const Env& env) const override;
|
|
bool operator==(const AtomicOp& other) const override;
|
|
bool is_sequence_point() const override;
|
|
FormElement* get_as_form(FormPool& pool, const Env& env) const override;
|
|
RegisterAccess get_set_destination() const override;
|
|
void update_register_info() override;
|
|
TypeState propagate_types_internal(const TypeState& input,
|
|
const Env& env,
|
|
DecompilerTypeSystem& dts) override;
|
|
void propagate_types2(types2::Instruction& instr,
|
|
const Env& env,
|
|
types2::TypeState& input_types,
|
|
DecompilerTypeSystem& dts,
|
|
types2::TypePropExtras& extras) override;
|
|
void collect_vars(RegAccessSet& vars) const override;
|
|
int offset() const { return m_offset; }
|
|
|
|
private:
|
|
SimpleAtom m_value;
|
|
int m_size;
|
|
int m_offset;
|
|
};
|
|
|
|
/*!
|
|
* An operation to load a variable from the stack.
|
|
*/
|
|
class StackSpillLoadOp : public AtomicOp {
|
|
public:
|
|
StackSpillLoadOp(RegisterAccess dst, int size, int offset, bool is_signed, int my_idx);
|
|
goos::Object to_form(const std::vector<DecompilerLabel>& labels, const Env& env) const override;
|
|
bool operator==(const AtomicOp& other) const override;
|
|
bool is_sequence_point() const override;
|
|
FormElement* get_as_form(FormPool& pool, const Env& env) const override;
|
|
RegisterAccess get_set_destination() const override;
|
|
void update_register_info() override;
|
|
TypeState propagate_types_internal(const TypeState& input,
|
|
const Env& env,
|
|
DecompilerTypeSystem& dts) override;
|
|
void propagate_types2(types2::Instruction& instr,
|
|
const Env& env,
|
|
types2::TypeState& input_types,
|
|
DecompilerTypeSystem& dts,
|
|
types2::TypePropExtras& extras) override;
|
|
void collect_vars(RegAccessSet& vars) const override;
|
|
int offset() const { return m_offset; }
|
|
|
|
private:
|
|
RegisterAccess m_dst;
|
|
int m_size;
|
|
int m_offset;
|
|
bool m_is_signed;
|
|
};
|
|
|
|
bool get_as_reg_offset(const SimpleExpression& expr, IR2_RegOffset* out);
|
|
|
|
bool is_op_2(AtomicOp* op,
|
|
MatchParam<SimpleExpression::Kind> kind,
|
|
MatchParam<Register> dst,
|
|
MatchParam<Register> src0,
|
|
Register* dst_out = nullptr,
|
|
Register* src0_out = nullptr);
|
|
} // namespace decompiler
|