--- old/src/hotspot/share/c1/c1_CodeStubs.hpp	2019-12-17 21:18:24.000000000 +0300
+++ new/src/hotspot/share/c1/c1_CodeStubs.hpp	2019-12-17 21:18:24.000000000 +0300
@@ -123,6 +123,7 @@
  public:
   ConversionStub(Bytecodes::Code bytecode, LIR_Opr input, LIR_Opr result)
     : _bytecode(bytecode), _input(input), _result(result) {
+    NOT_IA32( assert(false, "used only by x86-32"); )
   }
 
   Bytecodes::Code bytecode() { return _bytecode; }