mirror of
https://github.com/RGBCube/serenity
synced 2025-07-26 14:57:34 +00:00
LibJS: Add a basic pass manager and add some basic passes
This commit adds a bunch of passes, the most interesting of which is a pass that merges blocks together, and a pass that places blocks that flow into each other next to each other, and a very simply pass that removes duplicate basic blocks. Note that this does not remove the jump at the end of each block in that pass to avoid scope creep in the passes.
This commit is contained in:
Ali Mohammad Pur
Ali Mohammad Pur
parent
e81fd7106b
commit
1414c7b049
17 changed files with 751 additions and 30 deletions
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@ -29,6 +29,7 @@ public:
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void execute_impl(Bytecode::Interpreter&) const;
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String to_string_impl(Bytecode::Executable const&) const;
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void replace_references_impl(BasicBlock const&, BasicBlock const&) { }
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private:
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Register m_src;
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@ -44,6 +45,7 @@ public:
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void execute_impl(Bytecode::Interpreter&) const;
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String to_string_impl(Bytecode::Executable const&) const;
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void replace_references_impl(BasicBlock const&, BasicBlock const&) { }
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private:
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Value m_value;
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@ -59,6 +61,7 @@ public:
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void execute_impl(Bytecode::Interpreter&) const;
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String to_string_impl(Bytecode::Executable const&) const;
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void replace_references_impl(BasicBlock const&, BasicBlock const&) { }
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private:
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Register m_dst;
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@ -88,20 +91,21 @@ private:
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O(RightShift, right_shift) \
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O(UnsignedRightShift, unsigned_right_shift)
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#define JS_DECLARE_COMMON_BINARY_OP(OpTitleCase, op_snake_case) \
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class OpTitleCase final : public Instruction { \
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public: \
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explicit OpTitleCase(Register lhs_reg) \
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: Instruction(Type::OpTitleCase) \
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, m_lhs_reg(lhs_reg) \
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{ \
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} \
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\
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void execute_impl(Bytecode::Interpreter&) const; \
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String to_string_impl(Bytecode::Executable const&) const; \
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\
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private: \
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Register m_lhs_reg; \
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#define JS_DECLARE_COMMON_BINARY_OP(OpTitleCase, op_snake_case) \
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class OpTitleCase final : public Instruction { \
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public: \
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explicit OpTitleCase(Register lhs_reg) \
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: Instruction(Type::OpTitleCase) \
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, m_lhs_reg(lhs_reg) \
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{ \
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} \
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\
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void execute_impl(Bytecode::Interpreter&) const; \
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String to_string_impl(Bytecode::Executable const&) const; \
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void replace_references_impl(BasicBlock const&, BasicBlock const&) { } \
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\
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private: \
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Register m_lhs_reg; \
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};
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JS_ENUMERATE_COMMON_BINARY_OPS(JS_DECLARE_COMMON_BINARY_OP)
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@ -114,16 +118,17 @@ JS_ENUMERATE_COMMON_BINARY_OPS(JS_DECLARE_COMMON_BINARY_OP)
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O(UnaryMinus, unary_minus) \
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O(Typeof, typeof_)
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#define JS_DECLARE_COMMON_UNARY_OP(OpTitleCase, op_snake_case) \
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class OpTitleCase final : public Instruction { \
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public: \
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OpTitleCase() \
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: Instruction(Type::OpTitleCase) \
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{ \
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} \
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\
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void execute_impl(Bytecode::Interpreter&) const; \
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String to_string_impl(Bytecode::Executable const&) const; \
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#define JS_DECLARE_COMMON_UNARY_OP(OpTitleCase, op_snake_case) \
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class OpTitleCase final : public Instruction { \
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public: \
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OpTitleCase() \
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: Instruction(Type::OpTitleCase) \
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{ \
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} \
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\
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void execute_impl(Bytecode::Interpreter&) const; \
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String to_string_impl(Bytecode::Executable const&) const; \
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void replace_references_impl(BasicBlock const&, BasicBlock const&) { } \
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};
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JS_ENUMERATE_COMMON_UNARY_OPS(JS_DECLARE_COMMON_UNARY_OP)
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@ -139,6 +144,7 @@ public:
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void execute_impl(Bytecode::Interpreter&) const;
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String to_string_impl(Bytecode::Executable const&) const;
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void replace_references_impl(BasicBlock const&, BasicBlock const&) { }
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private:
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StringTableIndex m_string;
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@ -153,6 +159,7 @@ public:
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void execute_impl(Bytecode::Interpreter&) const;
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String to_string_impl(Bytecode::Executable const&) const;
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void replace_references_impl(BasicBlock const&, BasicBlock const&) { }
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};
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class NewBigInt final : public Instruction {
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@ -165,6 +172,7 @@ public:
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void execute_impl(Bytecode::Interpreter&) const;
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String to_string_impl(Bytecode::Executable const&) const;
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void replace_references_impl(BasicBlock const&, BasicBlock const&) { }
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private:
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Crypto::SignedBigInteger m_bigint;
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@ -183,8 +191,12 @@ public:
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void execute_impl(Bytecode::Interpreter&) const;
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String to_string_impl(Bytecode::Executable const&) const;
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void replace_references_impl(BasicBlock const&, BasicBlock const&) { }
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size_t length_impl() const { return sizeof(*this) + sizeof(Register) * m_element_count; }
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size_t length_impl() const
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{
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return sizeof(*this) + sizeof(Register) * m_element_count;
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}
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private:
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size_t m_element_count { 0 };
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@ -201,6 +213,7 @@ public:
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void execute_impl(Bytecode::Interpreter&) const;
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String to_string_impl(Bytecode::Executable const&) const;
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void replace_references_impl(BasicBlock const&, BasicBlock const&) { }
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private:
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Register m_lhs;
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@ -216,6 +229,7 @@ public:
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void execute_impl(Bytecode::Interpreter&) const;
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String to_string_impl(Bytecode::Executable const&) const;
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void replace_references_impl(BasicBlock const&, BasicBlock const&) { }
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private:
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StringTableIndex m_identifier;
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@ -231,6 +245,7 @@ public:
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void execute_impl(Bytecode::Interpreter&) const;
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String to_string_impl(Bytecode::Executable const&) const;
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void replace_references_impl(BasicBlock const&, BasicBlock const&) { }
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private:
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StringTableIndex m_identifier;
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@ -246,6 +261,7 @@ public:
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void execute_impl(Bytecode::Interpreter&) const;
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String to_string_impl(Bytecode::Executable const&) const;
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void replace_references_impl(BasicBlock const&, BasicBlock const&) { }
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private:
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StringTableIndex m_property;
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@ -262,6 +278,7 @@ public:
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void execute_impl(Bytecode::Interpreter&) const;
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String to_string_impl(Bytecode::Executable const&) const;
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void replace_references_impl(BasicBlock const&, BasicBlock const&) { }
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private:
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Register m_base;
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@ -278,6 +295,7 @@ public:
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void execute_impl(Bytecode::Interpreter&) const;
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String to_string_impl(Bytecode::Executable const&) const;
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void replace_references_impl(BasicBlock const&, BasicBlock const&) { }
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private:
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Register m_base;
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@ -294,6 +312,7 @@ public:
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void execute_impl(Bytecode::Interpreter&) const;
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String to_string_impl(Bytecode::Executable const&) const;
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void replace_references_impl(BasicBlock const&, BasicBlock const&) { }
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private:
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Register m_base;
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@ -326,6 +345,10 @@ public:
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void execute_impl(Bytecode::Interpreter&) const;
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String to_string_impl(Bytecode::Executable const&) const;
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void replace_references_impl(BasicBlock const&, BasicBlock const&);
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auto& true_target() const { return m_true_target; }
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auto& false_target() const { return m_false_target; }
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protected:
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Optional<Label> m_true_target;
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@ -375,8 +398,12 @@ public:
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void execute_impl(Bytecode::Interpreter&) const;
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String to_string_impl(Bytecode::Executable const&) const;
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void replace_references_impl(BasicBlock const&, BasicBlock const&) { }
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size_t length_impl() const { return sizeof(*this) + sizeof(Register) * m_argument_count; }
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size_t length_impl() const
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{
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return sizeof(*this) + sizeof(Register) * m_argument_count;
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}
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private:
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Register m_callee;
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@ -396,6 +423,7 @@ public:
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void execute_impl(Bytecode::Interpreter&) const;
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String to_string_impl(Bytecode::Executable const&) const;
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void replace_references_impl(BasicBlock const&, BasicBlock const&) { }
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private:
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FunctionNode const& m_function_node;
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@ -412,6 +440,7 @@ public:
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void execute_impl(Bytecode::Interpreter&) const;
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String to_string_impl(Bytecode::Executable const&) const;
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void replace_references_impl(BasicBlock const&, BasicBlock const&) { }
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};
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class Increment final : public Instruction {
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@ -423,6 +452,7 @@ public:
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void execute_impl(Bytecode::Interpreter&) const;
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String to_string_impl(Bytecode::Executable const&) const;
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void replace_references_impl(BasicBlock const&, BasicBlock const&) { }
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};
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class Decrement final : public Instruction {
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@ -434,6 +464,7 @@ public:
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void execute_impl(Bytecode::Interpreter&) const;
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String to_string_impl(Bytecode::Executable const&) const;
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void replace_references_impl(BasicBlock const&, BasicBlock const&) { }
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};
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class Throw final : public Instruction {
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@ -447,6 +478,7 @@ public:
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void execute_impl(Bytecode::Interpreter&) const;
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String to_string_impl(Bytecode::Executable const&) const;
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void replace_references_impl(BasicBlock const&, BasicBlock const&) { }
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};
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class EnterUnwindContext final : public Instruction {
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@ -463,6 +495,11 @@ public:
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void execute_impl(Bytecode::Interpreter&) const;
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String to_string_impl(Bytecode::Executable const&) const;
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void replace_references_impl(BasicBlock const&, BasicBlock const&);
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auto& entry_point() const { return m_entry_point; }
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auto& handler_target() const { return m_handler_target; }
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auto& finalizer_target() const { return m_finalizer_target; }
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private:
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Label m_entry_point;
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@ -479,6 +516,7 @@ public:
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void execute_impl(Bytecode::Interpreter&) const;
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String to_string_impl(Bytecode::Executable const&) const;
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void replace_references_impl(BasicBlock const&, BasicBlock const&) { }
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};
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class ContinuePendingUnwind final : public Instruction {
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@ -493,6 +531,9 @@ public:
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void execute_impl(Bytecode::Interpreter&) const;
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String to_string_impl(Bytecode::Executable const&) const;
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void replace_references_impl(BasicBlock const&, BasicBlock const&);
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auto& resume_target() const { return m_resume_target; }
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private:
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Label m_resume_target;
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@ -515,6 +556,9 @@ public:
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void execute_impl(Bytecode::Interpreter&) const;
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String to_string_impl(Bytecode::Executable const&) const;
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void replace_references_impl(BasicBlock const&, BasicBlock const&);
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auto& continuation() const { return m_continuation_label; }
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private:
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Optional<Label> m_continuation_label;
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@ -529,6 +573,7 @@ public:
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}
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void execute_impl(Bytecode::Interpreter&) const;
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String to_string_impl(Bytecode::Executable const&) const;
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void replace_references_impl(BasicBlock const&, BasicBlock const&) { }
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private:
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HashMap<u32, Variable> m_variables;
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@ -544,6 +589,7 @@ public:
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void execute_impl(Bytecode::Interpreter&) const;
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String to_string_impl(Bytecode::Executable const&) const;
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void replace_references_impl(BasicBlock const&, BasicBlock const&) { }
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private:
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size_t m_index { 0 };
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@ -568,6 +614,21 @@ ALWAYS_INLINE void Instruction::execute(Bytecode::Interpreter& interpreter) cons
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#undef __BYTECODE_OP
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}
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ALWAYS_INLINE void Instruction::replace_references(BasicBlock const& from, BasicBlock const& to)
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{
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#define __BYTECODE_OP(op) \
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case Instruction::Type::op: \
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return static_cast<Bytecode::Op::op&>(*this).replace_references_impl(from, to);
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switch (type()) {
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ENUMERATE_BYTECODE_OPS(__BYTECODE_OP)
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default:
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VERIFY_NOT_REACHED();
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}
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#undef __BYTECODE_OP
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}
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ALWAYS_INLINE size_t Instruction::length() const
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{
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if (type() == Type::Call)
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@ -587,4 +648,18 @@ ALWAYS_INLINE size_t Instruction::length() const
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#undef __BYTECODE_OP
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}
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ALWAYS_INLINE bool Instruction::is_terminator() const
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{
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#define __BYTECODE_OP(op) \
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case Type::op: \
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return Op::op::IsTerminator;
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switch (type()) {
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ENUMERATE_BYTECODE_OPS(__BYTECODE_OP)
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default:
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VERIFY_NOT_REACHED();
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}
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#undef __BYTECODE_OP
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}
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}
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