BNOT instruction [Delivers #81700198]

evmcc/test/arith/arith_bnot.evm

@@ -0,0 +1 @@
+6201e2406000546000530960005460206000f2

evmcc/test/arith/arith_bnot.lll

@@ -0,0 +1,14 @@
+
+(asm 
+123456
+0
+MSTORE
+0
+MLOAD
+BNOT
+0
+MSTORE
+32
+0
+RETURN
+)

libevmjit/Compiler.cpp

@@ -372,14 +372,11 @@ void Compiler::compileBasicBlock(BasicBlock& basicBlock, bytesConstRef bytecode,
 			break;
 		}
 
-		/*case Instruction::NEG:
+		case Instruction::BNOT:
 		{
-			auto top = stack.pop();
+			auto value = stack.pop();
-			auto zero = Constant::get(0);
+			auto ret = m_builder.CreateXor(value, llvm::APInt(256, -1, true), "bnot");
-			auto res = m_builder.CreateSub(zero, top);
+		}
-			stack.push(res);
-			break;
-		}*/
 
 		case Instruction::LT:
 		{