Remove error label / invalid jump label.

libsolidity/codegen/CompilerUtils.cpp

@@ -299,25 +299,6 @@ void CompilerUtils::zeroInitialiseMemoryArray(ArrayType const& _type)
 	m_context << Instruction::SWAP1 << Instruction::POP;
 }
 
-void CompilerUtils::memoryCopyPrecompile()
-{
-	// Stack here: size target source
-
-	m_context.appendInlineAssembly(R"(
-		{
-		let words := div(add(len, 31), 32)
-		let cost := add(15, mul(3, words))
-		jumpi(invalidJumpLabel, iszero(call(cost, $identityContractAddress, 0, src, len, dst, len)))
-		}
-	)",
-		{ "len", "dst", "src" },
-		map<string, string> {
-			{ "$identityContractAddress", toString(identityContractAddress) }
-		}
-	);
-	m_context << Instruction::POP << Instruction::POP << Instruction::POP;
-}
-
 void CompilerUtils::memoryCopy32()
 {
 	// Stack here: size target source

libsolidity/codegen/CompilerUtils.h

@@ -109,10 +109,6 @@ public:
 	/// Stack post: <updated_memptr>
 	void zeroInitialiseMemoryArray(ArrayType const& _type);
 
-	/// Uses a CALL to the identity contract to perform a memory-to-memory copy.
-	/// Stack pre: <size> <target> <source>
-	/// Stack post:
-	void memoryCopyPrecompile();
 	/// Copies full 32 byte words in memory (regions cannot overlap), i.e. may copy more than length.
 	/// Stack pre: <size> <target> <source>
 	/// Stack post:

libsolidity/inlineasm/AsmCodeGen.cpp

@@ -278,8 +278,6 @@ private:
 	{
 		if (_label.id == Scope::Label::unassignedLabelId)
 			_label.id = m_state.newLabelId();
-		else if (_label.id == Scope::Label::errorLabelId)
-			_label.id = size_t(m_state.assembly.errorTag().data());
 	}
 
 

libsolidity/inlineasm/AsmScope.h

@@ -73,7 +73,6 @@ struct Scope
 	struct Label
 	{
 		size_t id = unassignedLabelId;
-		static const size_t errorLabelId = -1;
 		static const size_t unassignedLabelId = 0;
 	};
 

libsolidity/inlineasm/AsmScopeFiller.cpp

@@ -39,10 +39,6 @@ using namespace dev::solidity::assembly;
 ScopeFiller::ScopeFiller(ScopeFiller::Scopes& _scopes, ErrorList& _errors):
 	m_scopes(_scopes), m_errors(_errors)
 {
-	// Make the Solidity ErrorTag available to inline assembly
-	Scope::Label errorLabel;
-	errorLabel.id = Scope::Label::errorLabelId;
-	scope(nullptr).identifiers["invalidJumpLabel"] = errorLabel;
 	m_currentScope = &scope(nullptr);
 }