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| author | chriseth <c@ethdev.com> | 2017-01-07 00:05:27 +0800 |
|---|---|---|
| committer | chriseth <c@ethdev.com> | 2017-01-13 00:52:27 +0800 |
| commit | da5e171f3b7a8d16fb01f4366f61a301567f1ae2 (patch) | |
| tree | 25798fce92d8e02cf1b252a34f9d0ec6748dcdcd /libevmasm/ConstantOptimiser.h | |
| parent | f1a4976ce65bd4730f72b0805635e818ad6334f7 (diff) | |
| download | dexon-solidity-da5e171f3b7a8d16fb01f4366f61a301567f1ae2.tar.gz dexon-solidity-da5e171f3b7a8d16fb01f4366f61a301567f1ae2.tar.zst dexon-solidity-da5e171f3b7a8d16fb01f4366f61a301567f1ae2.zip | |
Optimize constant optimization.
Diffstat (limited to 'libevmasm/ConstantOptimiser.h')
| -rw-r--r-- | libevmasm/ConstantOptimiser.h | 19 |
1 files changed, 11 insertions, 8 deletions
diff --git a/libevmasm/ConstantOptimiser.h b/libevmasm/ConstantOptimiser.h index b35b2a69..dfa2fbf8 100644 --- a/libevmasm/ConstantOptimiser.h +++ b/libevmasm/ConstantOptimiser.h @@ -60,7 +60,10 @@ public: explicit ConstantOptimisationMethod(Params const& _params, u256 const& _value): m_params(_params), m_value(_value) {} virtual bigint gasNeeded() = 0; - virtual void execute(Assembly& _assembly, AssemblyItems& _items) = 0; + /// Executes the method, potentially appending to the assembly and returns a vector of + /// assembly items the constant should be relpaced with in one sweep. + /// If the vector is empty, the constants will not be deleted. + virtual AssemblyItems execute(Assembly& _assembly) = 0; protected: size_t dataSize() const { return std::max<size_t>(1, dev::bytesRequired(m_value)); } @@ -83,8 +86,8 @@ protected: return m_params.runs * _runGas + m_params.multiplicity * _repeatedDataGas + _uniqueDataGas; } - /// Replaces the constant by the code given in @a _replacement. - void replaceConstants(AssemblyItems& _items, AssemblyItems const& _replacement) const; + /// Replaces all constants i by the code given in @a _replacement[i]. + static void replaceConstants(AssemblyItems& _items, std::map<u256, AssemblyItems> const& _replacement); Params m_params; u256 const& m_value; @@ -100,7 +103,7 @@ public: explicit LiteralMethod(Params const& _params, u256 const& _value): ConstantOptimisationMethod(_params, _value) {} virtual bigint gasNeeded() override; - virtual void execute(Assembly&, AssemblyItems&) override {} + virtual AssemblyItems execute(Assembly&) override { return AssemblyItems{}; } }; /** @@ -111,10 +114,10 @@ class CodeCopyMethod: public ConstantOptimisationMethod public: explicit CodeCopyMethod(Params const& _params, u256 const& _value); virtual bigint gasNeeded() override; - virtual void execute(Assembly& _assembly, AssemblyItems& _items) override; + virtual AssemblyItems execute(Assembly& _assembly) override; protected: - AssemblyItems m_copyRoutine; + AssemblyItems const& copyRoutine() const; }; /** @@ -130,9 +133,9 @@ public: } virtual bigint gasNeeded() override { return gasNeeded(m_routine); } - virtual void execute(Assembly&, AssemblyItems& _items) override + virtual AssemblyItems execute(Assembly&) override { - replaceConstants(_items, m_routine); + return m_routine; } protected: |