Merge pull request #9816 from ethereum/exp-base-literals

[Sol->Yul] Optimization for exponentiation when the base is a literal

libsolidity/codegen/YulUtilFunctions.h

@@ -128,6 +128,14 @@ public:
 	/// signature: (base, exponent) -> power
 	std::string overflowCheckedIntExpFunction(IntegerType const& _type, IntegerType const& _exponentType);
 
+	/// @returns the name of the exponentiation function, specialized for literal base.
+	/// signature: exponent -> power
+	std::string overflowCheckedIntLiteralExpFunction(
+		RationalNumberType const& _baseType,
+		IntegerType const& _exponentType,
+		IntegerType const& _commonType
+	);
+
 	/// Generic unsigned checked exponentiation function.
 	/// Reverts if the result is larger than max.
 	/// signature: (base, exponent, max) -> power