diff --git a/libsolidity/codegen/ABIFunctions.cpp b/libsolidity/codegen/ABIFunctions.cpp
index b6a479e74..d2512881a 100644
--- a/libsolidity/codegen/ABIFunctions.cpp
+++ b/libsolidity/codegen/ABIFunctions.cpp
@@ -1231,9 +1231,10 @@ string ABIFunctions::abiDecodingFunctionCalldataArray(ArrayType const& _type)
 		"abi_decode_" +
 		_type.identifier();
 	return createFunction(functionName, [&]() {
-		string templ;
+		Whiskers w;
 		if (_type.isDynamicallySized())
-			templ = R"(
+		{
+			w = Whiskers(R"(
 				// <readableTypeName>
 				function <functionName>(offset, end) -> arrayPos, length {
 					if iszero(slt(add(offset, 0x1f), end)) { <revertStringOffset> }
@@ -1242,25 +1243,27 @@ string ABIFunctions::abiDecodingFunctionCalldataArray(ArrayType const& _type)
 					arrayPos := add(offset, 0x20)
 					if gt(add(arrayPos, mul(length, <stride>)), end) { <revertStringPos> }
 				}
-			)";
+			)");
+			w("revertStringOffset", revertReasonIfDebug("ABI decoding: invalid calldata array offset"));
+			w("revertStringLength", revertReasonIfDebug("ABI decoding: invalid calldata array length"));
+		}
 		else
-			templ = R"(
+		{
+			w = Whiskers(R"(
 				// <readableTypeName>
 				function <functionName>(offset, end) -> arrayPos {
 					arrayPos := offset
 					if gt(add(arrayPos, mul(<length>, <stride>)), end) { <revertStringPos> }
 				}
-			)";
-		Whiskers w{templ};
-		// TODO add test
-		w("revertStringOffset", revertReasonIfDebug("ABI decoding: invalid calldata array offset"));
-		w("revertStringLength", revertReasonIfDebug("ABI decoding: invalid calldata array length"));
+			)");
+			w("length", toCompactHexWithPrefix(_type.length()));
+		}
 		w("revertStringPos", revertReasonIfDebug("ABI decoding: invalid calldata array stride"));
 		w("functionName", functionName);
 		w("readableTypeName", _type.toString(true));
 		w("stride", toCompactHexWithPrefix(_type.calldataStride()));
-		if (!_type.isDynamicallySized())
-			w("length", toCompactHexWithPrefix(_type.length()));
+
+		// TODO add test
 		return w.render();
 	});
 }
diff --git a/libsolidity/codegen/YulUtilFunctions.cpp b/libsolidity/codegen/YulUtilFunctions.cpp
index 2fd5640f1..b66b9cf25 100644
--- a/libsolidity/codegen/YulUtilFunctions.cpp
+++ b/libsolidity/codegen/YulUtilFunctions.cpp
@@ -959,7 +959,6 @@ string YulUtilFunctions::overflowCheckedUnsignedExpFunction()
 			("functionName", functionName)
 			("panic", panicFunction(PanicCode::UnderOverflow))
 			("expLoop", overflowCheckedExpLoopFunction())
-			("shr_1", shiftRightFunction(1))
 			.render();
 	});
 }
@@ -1326,8 +1325,6 @@ string YulUtilFunctions::byteArrayTransitLongToShortFunction(ArrayType const& _t
 			("functionName", functionName)
 			("dataPosition", arrayDataAreaFunction(_type))
 			("extractUsedApplyLen", shortByteArrayEncodeUsedAreaSetLengthFunction())
-			("shl", shiftLeftFunctionDynamic())
-			("ones", formatNumber((bigint(1) << 256) - 1))
 			.render();
 	});
 }
@@ -1420,7 +1417,6 @@ string YulUtilFunctions::storageByteArrayPopFunction(ArrayType const& _type)
 			("encodeUsedSetLen", shortByteArrayEncodeUsedAreaSetLengthFunction())
 			("indexAccess", storageArrayIndexAccessFunction(_type))
 			("setToZero", storageSetToZeroFunction(*_type.baseType()))
-			("shl", shiftLeftFunctionDynamic())
 			.render();
 	});
 }
@@ -1492,7 +1488,6 @@ string YulUtilFunctions::storageArrayPushFunction(ArrayType const& _type, Type c
 			("storeValue", updateStorageValueFunction(*_fromType, *_type.baseType()))
 			("maxArrayLength", (u256(1) << 64).str())
 			("shl", shiftLeftFunctionDynamic())
-			("shr", shiftRightFunction(248))
 			.render();
 	});
 }
@@ -1658,7 +1653,6 @@ string YulUtilFunctions::clearStorageStructFunction(StructType const& _type)
 			}
 		)")
 		("functionName", functionName)
-		("storageSize", _type.storageSize().str())
 		("member", memberSetValues)
 		.render();
 	});
@@ -1742,7 +1736,6 @@ string YulUtilFunctions::copyArrayToStorageFunction(ArrayType const& _fromType,
 		templ("srcDataLocation", arrayDataAreaFunction(_fromType));
 		if (fromCalldata)
 		{
-			templ("dynamicallySizedBase", _fromType.baseType()->isDynamicallySized());
 			templ("dynamicallyEncodedBase", _fromType.baseType()->isDynamicallyEncoded());
 			if (_fromType.baseType()->isDynamicallyEncoded())
 				templ("accessCalldataTail", accessCalldataTailFunction(*_fromType.baseType()));
@@ -3380,7 +3373,6 @@ string YulUtilFunctions::copyStructToStorageFunction(StructType const& _from, St
 					solAssert(srcOffset == 0, "");
 
 			}
-			t("memberStorageSlotOffset", to_string(offset));
 			t("updateStorageValue", updateStorageValueFunction(
 				memberType,
 				*toStructMembers[i].type,
diff --git a/libsolidity/codegen/ir/IRGenerator.cpp b/libsolidity/codegen/ir/IRGenerator.cpp
index 22b506291..c91e2536e 100644
--- a/libsolidity/codegen/ir/IRGenerator.cpp
+++ b/libsolidity/codegen/ir/IRGenerator.cpp
@@ -891,7 +891,6 @@ string IRGenerator::dispatchRoutine(ContractDefinition const& _contract)
 		}
 
 		t("fallback", fallbackCode);
-		t("revertNoSignature", "");
 	}
 	else
 		t(
diff --git a/libsolutil/Whiskers.cpp b/libsolutil/Whiskers.cpp
index 3049af5c4..e236104c7 100644
--- a/libsolutil/Whiskers.cpp
+++ b/libsolutil/Whiskers.cpp
@@ -40,6 +40,7 @@ Whiskers& Whiskers::operator()(string _parameter, string _value)
 {
 	checkParameterValid(_parameter);
 	checkParameterUnknown(_parameter);
+	checkTemplateContainsTags(_parameter, {""});
 	m_parameters[move(_parameter)] = move(_value);
 	return *this;
 }
@@ -48,6 +49,7 @@ Whiskers& Whiskers::operator()(string _parameter, bool _value)
 {
 	checkParameterValid(_parameter);
 	checkParameterUnknown(_parameter);
+	checkTemplateContainsTags(_parameter, {"?", "/"});
 	m_conditions[move(_parameter)] = _value;
 	return *this;
 }
@@ -59,6 +61,7 @@ Whiskers& Whiskers::operator()(
 {
 	checkParameterValid(_listParameter);
 	checkParameterUnknown(_listParameter);
+	checkTemplateContainsTags(_listParameter, {"#", "/"});
 	for (auto const& element: _values)
 		for (auto const& val: element)
 			checkParameterValid(val.first);
@@ -100,6 +103,19 @@ void Whiskers::checkParameterUnknown(string const& _parameter) const
 	);
 }
 
+void Whiskers::checkTemplateContainsTags(string const& _parameter, vector<string> const& _prefixes) const
+{
+	for (auto const& prefix: _prefixes)
+	{
+		string tag{"<" + prefix + _parameter + ">"};
+		assertThrow(
+			m_template.find(tag) != string::npos,
+			WhiskersError,
+			"Tag '" + tag + "' not found in template:\n" + m_template
+		);
+	}
+}
+
 namespace
 {
 template<class ReplaceCallback>
diff --git a/libsolutil/Whiskers.h b/libsolutil/Whiskers.h
index 5ddb7a884..113fbe6ed 100644
--- a/libsolutil/Whiskers.h
+++ b/libsolutil/Whiskers.h
@@ -73,7 +73,7 @@ public:
 	using StringMap = std::map<std::string, std::string>;
 	using StringListMap = std::map<std::string, std::vector<StringMap>>;
 
-	explicit Whiskers(std::string _template);
+	explicit Whiskers(std::string _template = "");
 
 	/// Sets a single regular parameter, <paramName>.
 	Whiskers& operator()(std::string _parameter, std::string _value);
@@ -94,6 +94,12 @@ private:
 	void checkParameterValid(std::string const& _parameter) const;
 	void checkParameterUnknown(std::string const& _parameter) const;
 
+	/// Checks whether the string stored in `m_template` contains all the tags specified.
+	/// @param _parameter name of the parameter. This name is used to construct the tag(s).
+	/// @param _prefixes a vector of strings, where each element is used to compose the tag
+	///        like `"<" + element + _parameter + ">"`. Each element of _prefixes is used as a prefix of the tag name.
+	void checkTemplateContainsTags(std::string const& _parameter, std::vector<std::string> const& _prefixes) const;
+
 	static std::string replace(
 		std::string const& _template,
 		StringMap const& _parameters,
diff --git a/test/libsolutil/Whiskers.cpp b/test/libsolutil/Whiskers.cpp
index 1cc889127..3ccaa64da 100644
--- a/test/libsolutil/Whiskers.cpp
+++ b/test/libsolutil/Whiskers.cpp
@@ -190,7 +190,7 @@ BOOST_AUTO_TEST_CASE(parameter_collision)
 	vector<map<string, string>> list(1);
 	list[0]["a"] = "x";
 	Whiskers m(templ);
-	m("a", "X")("b", list);
+	BOOST_CHECK_THROW(m("a", "X")("b", list), WhiskersError);
 	BOOST_CHECK_THROW(m.render(), WhiskersError);
 }