solidity/test/libyul/Metrics.cpp
2020-05-20 16:47:23 +02:00

383 lines
9.0 KiB
C++

/*
This file is part of solidity.
solidity is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
solidity is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with solidity. If not, see <http://www.gnu.org/licenses/>.
*/
/**
* Unit tests for the code metrics.
*/
#include <test/Common.h>
#include <test/libyul/Common.h>
#include <libyul/optimiser/Metrics.h>
#include <libyul/AsmData.h>
#include <boost/test/unit_test.hpp>
using namespace std;
using namespace solidity::langutil;
namespace solidity::yul::test
{
namespace
{
size_t codeSize(string const& _source, CodeWeights const _weights = {})
{
shared_ptr<Block> ast = parse(_source, false).first;
BOOST_REQUIRE(ast);
return CodeSize::codeSize(*ast, _weights);
}
}
class CustomWeightFixture
{
protected:
CodeWeights m_weights{
/* expressionStatementCost = */ 1,
/* assignmentCost = */ 2,
/* variableDeclarationCost = */ 3,
/* functionDefinitionCost = */ 4,
/* ifCost = */ 5,
/* switchCost = */ 6,
/* caseCost = */ 7,
/* forLoopCost = */ 8,
/* breakCost = */ 9,
/* continueCost = */ 10,
/* leaveCost = */ 11,
/* blockCost = */ 12,
/* functionCallCost = */ 13,
/* identifierCost = */ 14,
/* literalCost = */ 15,
};
};
BOOST_AUTO_TEST_SUITE(YulCodeSize)
BOOST_AUTO_TEST_CASE(empty_code)
{
BOOST_CHECK_EQUAL(codeSize("{}"), 0);
}
BOOST_FIXTURE_TEST_CASE(empty_code_custom_weights, CustomWeightFixture)
{
BOOST_CHECK_EQUAL(codeSize("{}", m_weights), 0);
}
BOOST_AUTO_TEST_CASE(nested_blocks)
{
BOOST_CHECK_EQUAL(codeSize("{ {} {} {{ }} }"), 0);
}
BOOST_FIXTURE_TEST_CASE(nested_blocks_custom_weights, CustomWeightFixture)
{
BOOST_CHECK_EQUAL(codeSize("{ {} {} {{ }} }", m_weights), 4 * m_weights.blockCost);
}
BOOST_AUTO_TEST_CASE(instruction)
{
BOOST_CHECK_EQUAL(codeSize("{ pop(calldatasize()) }"), 2);
}
BOOST_FIXTURE_TEST_CASE(instruction_custom_weights, CustomWeightFixture)
{
BOOST_CHECK_EQUAL(
codeSize("{ pop(calldatasize()) }", m_weights),
2 * m_weights.functionCallCost +
1 * m_weights.expressionStatementCost
);
}
BOOST_AUTO_TEST_CASE(variables_are_free)
{
BOOST_CHECK_EQUAL(codeSize("{ let x let y let a, b, c }"), 0);
}
BOOST_FIXTURE_TEST_CASE(variables_custom_weights, CustomWeightFixture)
{
BOOST_CHECK_EQUAL(
codeSize("{ let x let y let a, b, c }", m_weights),
3 * m_weights.variableDeclarationCost
);
}
BOOST_AUTO_TEST_CASE(constants_cost_one)
{
BOOST_CHECK_EQUAL(codeSize("{ let x := 3 }"), 1);
}
BOOST_FIXTURE_TEST_CASE(constants_custom_weights, CustomWeightFixture)
{
BOOST_CHECK_EQUAL(
codeSize("{ let x := 3 }", m_weights),
1 * m_weights.variableDeclarationCost +
1 * m_weights.literalCost
);
}
BOOST_AUTO_TEST_CASE(functions_are_skipped)
{
BOOST_CHECK_EQUAL(codeSize("{ function f(x) -> r { r := mload(x) } }"), 0);
}
BOOST_FIXTURE_TEST_CASE(functions_are_skipped_custom_weights, CustomWeightFixture)
{
BOOST_CHECK_EQUAL(codeSize("{ function f(x) -> r { r := mload(x) } }", m_weights), 0);
}
BOOST_AUTO_TEST_CASE(function_with_arguments)
{
BOOST_CHECK_EQUAL(codeSize("{ function f(x) { sstore(x, 2) } f(2) }"), 2);
}
BOOST_FIXTURE_TEST_CASE(function_with_arguments_custom_weights, CustomWeightFixture)
{
BOOST_CHECK_EQUAL(
codeSize("{ function f(x) { sstore(x, 2) } f(2) }", m_weights),
1 * m_weights.expressionStatementCost +
1 * m_weights.functionCallCost +
1 * m_weights.literalCost
);
}
BOOST_AUTO_TEST_CASE(function_with_variables_as_arguments)
{
BOOST_CHECK_EQUAL(codeSize("{ function f(x) { sstore(x, 2) } let y f(y) }"), 1);
}
BOOST_FIXTURE_TEST_CASE(function_with_variables_as_arguments_custom_weights, CustomWeightFixture)
{
BOOST_CHECK_EQUAL(
codeSize("{ function f(x) { sstore(x, 2) } let y f(y) }", m_weights),
1 * m_weights.variableDeclarationCost +
1 * m_weights.expressionStatementCost +
1 * m_weights.functionCallCost +
1 * m_weights.identifierCost
);
}
BOOST_AUTO_TEST_CASE(function_with_variables_and_constants_as_arguments)
{
BOOST_CHECK_EQUAL(codeSize(
"{ function f(x, r) -> z { sstore(x, r) z := r } let y let t := f(y, 2) }"
), 2);
}
BOOST_FIXTURE_TEST_CASE(
function_with_variables_and_constants_as_arguments_custom_weights,
CustomWeightFixture
)
{
BOOST_CHECK_EQUAL(
codeSize(
"{ function f(x, r) -> z { sstore(x, r) z := r } let y let t := f(y, 2) }",
m_weights
),
2 * m_weights.variableDeclarationCost +
1 * m_weights.functionCallCost +
1 * m_weights.identifierCost +
1 * m_weights.literalCost
);
}
BOOST_AUTO_TEST_CASE(assignment)
{
BOOST_CHECK_EQUAL(codeSize("{ let a a := 3 }"), 1);
}
BOOST_FIXTURE_TEST_CASE(assignment_custom_weights, CustomWeightFixture)
{
BOOST_CHECK_EQUAL(
codeSize("{ let a a := 3 }", m_weights),
1 * m_weights.variableDeclarationCost +
1 * m_weights.assignmentCost +
1 * m_weights.literalCost
);
}
BOOST_AUTO_TEST_CASE(assignments_between_vars_are_free)
{
BOOST_CHECK_EQUAL(codeSize("{ let a let b := a a := b }"), 0);
}
BOOST_FIXTURE_TEST_CASE(assignments_between_vars_are_free_custom_weights, CustomWeightFixture)
{
BOOST_CHECK_EQUAL(
codeSize("{ let a let b := a a := b }", m_weights),
2 * m_weights.variableDeclarationCost +
1 * m_weights.assignmentCost +
2 * m_weights.identifierCost
);
}
BOOST_AUTO_TEST_CASE(assignment_complex)
{
BOOST_CHECK_EQUAL(codeSize("{ let a let x := mload(a) a := sload(x) }"), 2);
}
BOOST_FIXTURE_TEST_CASE(assignment_complex_custom_weights, CustomWeightFixture)
{
BOOST_CHECK_EQUAL(
codeSize("{ let a let x := mload(a) a := sload(x) }", m_weights),
2 * m_weights.variableDeclarationCost +
1 * m_weights.assignmentCost +
2 * m_weights.identifierCost +
2 * m_weights.functionCallCost
);
}
BOOST_AUTO_TEST_CASE(empty_for_loop)
{
BOOST_CHECK_EQUAL(codeSize(
"{ for {} 1 {} {} }"
), 4);
}
BOOST_FIXTURE_TEST_CASE(empty_for_loop_custom_weights, CustomWeightFixture)
{
BOOST_CHECK_EQUAL(
codeSize("{ for {} 1 {} {} }", m_weights),
1 * m_weights.forLoopCost +
1 * m_weights.literalCost
);
}
BOOST_AUTO_TEST_CASE(break_statement)
{
BOOST_CHECK_EQUAL(codeSize(
"{ for {} 1 {} { break } }"
), 6);
}
BOOST_FIXTURE_TEST_CASE(break_statement_custom_weights, CustomWeightFixture)
{
BOOST_CHECK_EQUAL(
codeSize("{ for {} 1 {} { break } }", m_weights),
1 * m_weights.forLoopCost +
1 * m_weights.literalCost +
1 * m_weights.breakCost
);
}
BOOST_AUTO_TEST_CASE(continue_statement)
{
BOOST_CHECK_EQUAL(codeSize(
"{ for {} 1 {} { continue } }"
), 6);
}
BOOST_FIXTURE_TEST_CASE(continue_statement_custom_weights, CustomWeightFixture)
{
BOOST_CHECK_EQUAL(
codeSize("{ for {} 1 {} { continue } }", m_weights),
1 * m_weights.forLoopCost +
1 * m_weights.literalCost +
1 * m_weights.continueCost
);
}
BOOST_AUTO_TEST_CASE(regular_for_loop)
{
BOOST_CHECK_EQUAL(codeSize(
"{ for { let x := 0 } lt(x, 10) { x := add(x, 1) } { mstore(x, 1) } }"
), 10);
}
BOOST_FIXTURE_TEST_CASE(regular_for_loop_custom_weights, CustomWeightFixture)
{
BOOST_CHECK_EQUAL(
codeSize("{ for { let x := 0 } lt(x, 10) { x := add(x, 1) } { mstore(x, 1) } }", m_weights),
1 * m_weights.forLoopCost +
1 * m_weights.variableDeclarationCost +
1 * m_weights.assignmentCost +
3 * m_weights.functionCallCost +
4 * m_weights.literalCost +
3 * m_weights.identifierCost +
1 * m_weights.expressionStatementCost
);
}
BOOST_AUTO_TEST_CASE(if_statement)
{
BOOST_CHECK_EQUAL(codeSize(
"{ if 1 {} }"
), 3);
}
BOOST_FIXTURE_TEST_CASE(if_statement_custom_weights, CustomWeightFixture)
{
BOOST_CHECK_EQUAL(
codeSize("{ if 1 {} }", m_weights),
1 * m_weights.ifCost +
1 * m_weights.literalCost
);
}
BOOST_AUTO_TEST_CASE(switch_statement_tiny)
{
BOOST_CHECK_EQUAL(codeSize(
"{ switch calldatasize() default {} }"
), 4);
}
BOOST_AUTO_TEST_CASE(switch_statement_small)
{
BOOST_CHECK_EQUAL(codeSize(
"{ switch calldatasize() case 0 {} default {} }"
), 6);
}
BOOST_FIXTURE_TEST_CASE(switch_statement_small_custom_weights, CustomWeightFixture)
{
BOOST_CHECK_EQUAL(
codeSize("{ switch calldatasize() case 0 {} default {} }", m_weights),
1 * m_weights.functionCallCost +
1 * m_weights.switchCost +
2 * m_weights.caseCost
);
}
BOOST_AUTO_TEST_CASE(switch_statement_medium)
{
BOOST_CHECK_EQUAL(codeSize(
"{ switch calldatasize() case 0 {} case 1 {} case 2 {} }"
), 8);
}
BOOST_AUTO_TEST_CASE(switch_statement_large)
{
BOOST_CHECK_EQUAL(codeSize(
"{ switch calldatasize() case 0 {} case 1 {} case 2 {} default {} }"
), 10);
}
BOOST_FIXTURE_TEST_CASE(switch_statement_large_custom_weights, CustomWeightFixture)
{
BOOST_CHECK_EQUAL(
codeSize("{ switch calldatasize() case 0 {} case 1 {} case 2 {} default {} }", m_weights),
1 * m_weights.functionCallCost +
1 * m_weights.switchCost +
4 * m_weights.caseCost
);
}
BOOST_AUTO_TEST_SUITE_END()
}