Provide EVM version to assembly analysis.

libsolidity/analysis/ReferencesResolver.cpp

@@ -278,8 +278,9 @@ bool ReferencesResolver::visit(InlineAssembly const& _inlineAssembly)
 	};
 
 	// Will be re-generated later with correct information
+	// We use the latest EVM version because we will re-run it anyway.
 	assembly::AsmAnalysisInfo analysisInfo;
-	assembly::AsmAnalyzer(analysisInfo, errorsIgnored, assembly::AsmFlavour::Loose, resolver).analyze(_inlineAssembly.operations());
+	assembly::AsmAnalyzer(analysisInfo, errorsIgnored, EVMVersion(), assembly::AsmFlavour::Loose, resolver).analyze(_inlineAssembly.operations());
 	return false;
 }
 

libsolidity/analysis/TypeChecker.cpp

@@ -875,6 +875,7 @@ bool TypeChecker::visit(InlineAssembly const& _inlineAssembly)
 	assembly::AsmAnalyzer analyzer(
 		*_inlineAssembly.annotation().analysisInfo,
 		m_errorReporter,
+		m_evmVersion,
 		assembly::AsmFlavour::Loose,
 		identifierAccess
 	);

libsolidity/codegen/CompilerContext.cpp

@@ -329,6 +329,7 @@ void CompilerContext::appendInlineAssembly(
 		analyzerResult = assembly::AsmAnalyzer(
 			analysisInfo,
 			errorReporter,
+			m_evmVersion,
 			assembly::AsmFlavour::Strict,
 			identifierAccess.resolve
 		).analyze(*parserResult);

libsolidity/inlineasm/AsmAnalysis.cpp

@@ -533,19 +533,33 @@ void AsmAnalyzer::expectValidType(string const& type, SourceLocation const& _loc
 
 void AsmAnalyzer::warnOnInstructions(solidity::Instruction _instr, SourceLocation const& _location)
 {
-	static set<solidity::Instruction> futureInstructions{
-		solidity::Instruction::CREATE2,
-		solidity::Instruction::RETURNDATACOPY,
-		solidity::Instruction::RETURNDATASIZE,
-		solidity::Instruction::STATICCALL
-	};
-	if (futureInstructions.count(_instr))
+	// We assume that returndatacopy, returndatasize and staticcall are either all available
+	// or all not available.
+	solAssert(m_evmVersion.supportsReturndata() == m_evmVersion.hasStaticCall(), "");
+
+	if (_instr == solidity::Instruction::CREATE2)
 		m_errorReporter.warning(
 			_location,
 			"The \"" +
 			boost::to_lower_copy(instructionInfo(_instr).name)
-			+ "\" instruction is only available after " +
-			"the Metropolis hard fork. Before that it acts as an invalid instruction."
+			+ "\" instruction is not supported by the VM version \"" +
+			"" + m_evmVersion.name() +
+			"\" you are currently compiling for. " +
+			"It will be interpreted as an invalid instruction on this VM."
+		);
+	else if ((
+		_instr == solidity::Instruction::RETURNDATACOPY ||
+		_instr == solidity::Instruction::RETURNDATASIZE ||
+		_instr == solidity::Instruction::STATICCALL
+	) && !m_evmVersion.supportsReturndata())
+		m_errorReporter.warning(
+			_location,
+			"The \"" +
+			boost::to_lower_copy(instructionInfo(_instr).name)
+			+ "\" instruction is only available for Byzantium-compatible VMs. " +
+			"You are currently compiling for \"" +
+			m_evmVersion.name() +
+			"\", where it will be interpreted as an invalid instruction."
 		);
 
 	static set<solidity::Instruction> experimentalInstructions{

libsolidity/inlineasm/AsmAnalysis.h

@@ -21,6 +21,7 @@
 #pragma once
 
 #include <libsolidity/interface/Exceptions.h>
+#include <libsolidity/interface/EVMVersion.h>
 
 #include <libsolidity/inlineasm/AsmScope.h>
 
@@ -54,9 +55,10 @@ public:
 	explicit AsmAnalyzer(
 		AsmAnalysisInfo& _analysisInfo,
 		ErrorReporter& _errorReporter,
+		EVMVersion _evmVersion,
 		AsmFlavour _flavour = AsmFlavour::Loose,
 		julia::ExternalIdentifierAccess::Resolver const& _resolver = julia::ExternalIdentifierAccess::Resolver()
-	): m_resolver(_resolver), m_info(_analysisInfo), m_errorReporter(_errorReporter), m_flavour(_flavour) {}
+	): m_resolver(_resolver), m_info(_analysisInfo), m_errorReporter(_errorReporter), m_evmVersion(_evmVersion), m_flavour(_flavour) {}
 
 	bool analyze(assembly::Block const& _block);
 
@@ -97,6 +99,7 @@ private:
 	std::set<Scope::Variable const*> m_activeVariables;
 	AsmAnalysisInfo& m_info;
 	ErrorReporter& m_errorReporter;
+	EVMVersion m_evmVersion;
 	AsmFlavour m_flavour = AsmFlavour::Loose;
 };
 

libsolidity/interface/AssemblyStack.cpp

@@ -91,7 +91,7 @@ bool AssemblyStack::analyze(assembly::Block const& _block, Scanner const* _scann
 bool AssemblyStack::analyzeParsed()
 {
 	m_analysisInfo = make_shared<assembly::AsmAnalysisInfo>();
-	assembly::AsmAnalyzer analyzer(*m_analysisInfo, m_errorReporter, languageToAsmFlavour(m_language));
+	assembly::AsmAnalyzer analyzer(*m_analysisInfo, m_errorReporter, m_evmVersion, languageToAsmFlavour(m_language));
 	m_analysisSuccessful = analyzer.analyze(*m_parserResult);
 	return m_analysisSuccessful;
 }

libsolidity/interface/AssemblyStack.h

@@ -22,6 +22,8 @@
 #pragma once
 
 #include <libsolidity/interface/ErrorReporter.h>
+#include <libsolidity/interface/EVMVersion.h>
+
 #include <libevmasm/LinkerObject.h>
 
 #include <string>
@@ -54,8 +56,8 @@ public:
 	enum class Language { JULIA, Assembly, StrictAssembly };
 	enum class Machine { EVM, EVM15, eWasm };
 
-	explicit AssemblyStack(Language _language = Language::Assembly):
-		m_language(_language), m_errorReporter(m_errors)
+	explicit AssemblyStack(EVMVersion _evmVersion = EVMVersion(), Language _language = Language::Assembly):
+		m_language(_language), m_evmVersion(_evmVersion), m_errorReporter(m_errors)
 	{}
 
 	/// @returns the scanner used during parsing
@@ -82,6 +84,7 @@ private:
 	bool analyzeParsed();
 
 	Language m_language = Language::Assembly;
+	EVMVersion m_evmVersion;
 
 	std::shared_ptr<Scanner> m_scanner;
 

solc/CommandLineInterface.cpp

@@ -748,6 +748,19 @@ bool CommandLineInterface::processInput()
 			if (!parseLibraryOption(library))
 				return false;
 
+	EVMVersion evmVersion;
+	if (m_args.count(g_strEVMVersion))
+	{
+		string versionOptionStr = m_args[g_strEVMVersion].as<string>();
+		boost::optional<EVMVersion> versionOption = EVMVersion::fromString(versionOptionStr);
+		if (!versionOption)
+		{
+			cerr << "Invalid option for --evm-version: " << versionOptionStr << endl;
+			return false;
+		}
+		evmVersion = *versionOption;
+	}
+
 	if (m_args.count(g_argAssemble) || m_args.count(g_argStrictAssembly) || m_args.count(g_argJulia))
 	{
 		// switch to assembly mode
@@ -771,7 +784,7 @@ bool CommandLineInterface::processInput()
 				return false;
 			}
 		}
-		return assemble(inputLanguage, targetMachine);
+		return assemble(evmVersion, inputLanguage, targetMachine);
 	}
 	if (m_args.count(g_argLink))
 	{
@@ -782,19 +795,6 @@ bool CommandLineInterface::processInput()
 
 	m_compiler.reset(new CompilerStack(fileReader));
 
-	EVMVersion evmVersion;
-	if (m_args.count(g_strEVMVersion))
-	{
-		string versionOptionStr = m_args[g_strEVMVersion].as<string>();
-		boost::optional<EVMVersion> versionOption = EVMVersion::fromString(versionOptionStr);
-		if (!versionOption)
-		{
-			cerr << "Invalid option for --evm-version: " << versionOptionStr << endl;
-			return false;
-		}
-		evmVersion = *versionOption;
-	}
-
 	auto scannerFromSourceName = [&](string const& _sourceName) -> solidity::Scanner const& { return m_compiler->scanner(_sourceName); };
 	SourceReferenceFormatter formatter(cerr, scannerFromSourceName);
 
@@ -1081,6 +1081,7 @@ void CommandLineInterface::writeLinkedFiles()
 }
 
 bool CommandLineInterface::assemble(
+	EVMVersion _evmVersion,
 	AssemblyStack::Language _language,
 	AssemblyStack::Machine _targetMachine
 )
@@ -1089,7 +1090,7 @@ bool CommandLineInterface::assemble(
 	map<string, AssemblyStack> assemblyStacks;
 	for (auto const& src: m_sourceCodes)
 	{
-		auto& stack = assemblyStacks[src.first] = AssemblyStack(_language);
+		auto& stack = assemblyStacks[src.first] = AssemblyStack(_evmVersion, _language);
 		try
 		{
 			if (!stack.parseAndAnalyze(src.first, src.second))

solc/CommandLineInterface.h

@@ -54,7 +54,7 @@ private:
 	bool link();
 	void writeLinkedFiles();
 
-	bool assemble(AssemblyStack::Language _language, AssemblyStack::Machine _targetMachine);
+	bool assemble(EVMVersion _evmVersion, AssemblyStack::Language _language, AssemblyStack::Machine _targetMachine);
 
 	void outputCompilationResults();
 

test/ExecutionFramework.cpp

@@ -51,17 +51,11 @@ string getIPCSocketPath()
 
 ExecutionFramework::ExecutionFramework() :
 	m_rpc(RPCSession::instance(getIPCSocketPath())),
+	m_evmVersion(dev::test::Options::get().evmVersion()),
 	m_optimize(dev::test::Options::get().optimize),
 	m_showMessages(dev::test::Options::get().showMessages),
 	m_sender(m_rpc.account(0))
 {
-	if (!dev::test::Options::get().evmVersion.empty())
-	{
-		auto version = solidity::EVMVersion::fromString(dev::test::Options::get().evmVersion);
-		BOOST_REQUIRE_MESSAGE(version, "Invalid EVM version: " + dev::test::Options::get().evmVersion);
-		m_evmVersion = *version;
-	}
-
 	m_rpc.test_rewindToBlock(0);
 }
 

test/TestHelper.cpp

@@ -47,7 +47,7 @@ Options::Options()
 			optimize = true;
 		else if (string(suite.argv[i]) == "--evm-version")
 		{
-			evmVersion = i + 1 < suite.argc ? suite.argv[i + 1] : "INVALID";
+			evmVersionString = i + 1 < suite.argc ? suite.argv[i + 1] : "INVALID";
 			++i;
 		}
 		else if (string(suite.argv[i]) == "--show-messages")
@@ -61,3 +61,17 @@ Options::Options()
 		if (auto path = getenv("ETH_TEST_IPC"))
 			ipcPath = path;
 }
+
+dev::solidity::EVMVersion Options::evmVersion() const
+{
+	if (!evmVersionString.empty())
+	{
+		// We do this check as opposed to in the constructor because the BOOST_REQUIRE
+		// macros cannot yet be used in the constructor.
+		auto version = solidity::EVMVersion::fromString(evmVersionString);
+		BOOST_REQUIRE_MESSAGE(version, "Invalid EVM version: " + evmVersionString);
+		return *version;
+	}
+	else
+		return dev::solidity::EVMVersion();
+}

test/TestHelper.h

@@ -36,14 +36,17 @@ struct Options: boost::noncopyable
 {
 	std::string ipcPath;
 	bool showMessages = false;
-	std::string evmVersion;
 	bool optimize = false;
 	bool disableIPC = false;
 	bool disableSMT = false;
 
+	solidity::EVMVersion evmVersion() const;
+
 	static Options const& get();
 
 private:
+	std::string evmVersionString;
+
 	Options();
 };
 

test/libjulia/Common.cpp

@@ -21,6 +21,8 @@
 
 #include <test/libjulia/Common.h>
 
+#include <test/TestHelper.h>
+
 #include <libjulia/optimiser/Disambiguator.h>
 
 #include <libsolidity/parsing/Scanner.h>
@@ -61,7 +63,12 @@ pair<shared_ptr<Block>, shared_ptr<assembly::AsmAnalysisInfo>> dev::julia::test:
 	{
 		BOOST_REQUIRE(errorReporter.errors().empty());
 		auto analysisInfo = make_shared<assembly::AsmAnalysisInfo>();
-		assembly::AsmAnalyzer analyzer(*analysisInfo, errorReporter, flavour);
+		assembly::AsmAnalyzer analyzer(
+			*analysisInfo,
+			errorReporter,
+			dev::test::Options::get().evmVersion(),
+			flavour
+		);
 		if (analyzer.analyze(*parserResult))
 		{
 			BOOST_REQUIRE(errorReporter.errors().empty());

test/libjulia/Parser.cpp

@@ -56,7 +56,12 @@ bool parse(string const& _source, ErrorReporter& errorReporter)
 		if (parserResult)
 		{
 			assembly::AsmAnalysisInfo analysisInfo;
-			return (assembly::AsmAnalyzer(analysisInfo, errorReporter, assembly::AsmFlavour::IULIA)).analyze(*parserResult);
+			return (assembly::AsmAnalyzer(
+				analysisInfo,
+				errorReporter,
+				dev::test::Options::get().evmVersion(),
+				assembly::AsmFlavour::IULIA
+			)).analyze(*parserResult);
 		}
 	}
 	catch (FatalError const&)

test/libsolidity/InlineAssembly.cpp

@@ -55,7 +55,7 @@ boost::optional<Error> parseAndReturnFirstError(
 	AssemblyStack::Machine _machine = AssemblyStack::Machine::EVM
 )
 {
-	AssemblyStack stack(_language);
+	AssemblyStack stack(dev::test::Options::get().evmVersion(), _language);
 	bool success = false;
 	try
 	{
@@ -117,7 +117,7 @@ Error expectError(
 
 void parsePrintCompare(string const& _source, bool _canWarn = false)
 {
-	AssemblyStack stack;
+	AssemblyStack stack(dev::test::Options::get().evmVersion());
 	BOOST_REQUIRE(stack.parseAndAnalyze("", _source));
 	if (_canWarn)
 		BOOST_REQUIRE(Error::containsOnlyWarnings(stack.errors()));
@@ -567,7 +567,7 @@ BOOST_AUTO_TEST_CASE(print_string_literal_unicode)
 {
 	string source = "{ let x := \"\\u1bac\" }";
 	string parsed = "{\n    let x := \"\\xe1\\xae\\xac\"\n}";
-	AssemblyStack stack;
+	AssemblyStack stack(dev::test::Options::get().evmVersion());
 	BOOST_REQUIRE(stack.parseAndAnalyze("", source));
 	BOOST_REQUIRE(stack.errors().empty());
 	BOOST_CHECK_EQUAL(stack.print(), parsed);