--- a/src/hotspot/share/oops/klass.hpp	Tue Oct 22 11:32:19 2019 +0800
+++ b/src/hotspot/share/oops/klass.hpp	Tue Oct 22 08:57:41 2019 +0200
@@ -340,19 +340,17 @@
   static ByteSize access_flags_offset()          { return in_ByteSize(offset_of(Klass, _access_flags)); }
 
   // Unpacking layout_helper:
-  enum {
-    _lh_neutral_value           = 0,  // neutral non-array non-instance value
-    _lh_instance_slow_path_bit  = 0x01,
-    _lh_log2_element_size_shift = BitsPerByte*0,
-    _lh_log2_element_size_mask  = BitsPerLong-1,
-    _lh_element_type_shift      = BitsPerByte*1,
-    _lh_element_type_mask       = right_n_bits(BitsPerByte),  // shifted mask
-    _lh_header_size_shift       = BitsPerByte*2,
-    _lh_header_size_mask        = right_n_bits(BitsPerByte),  // shifted mask
-    _lh_array_tag_bits          = 2,
-    _lh_array_tag_shift         = BitsPerInt - _lh_array_tag_bits,
-    _lh_array_tag_obj_value     = ~0x01   // 0x80000000 >> 30
-  };
+  static const int _lh_neutral_value           = 0;  // neutral non-array non-instance value
+  static const int _lh_instance_slow_path_bit  = 0x01;
+  static const int _lh_log2_element_size_shift = BitsPerByte*0;
+  static const int _lh_log2_element_size_mask  = BitsPerLong-1;
+  static const int _lh_element_type_shift      = BitsPerByte*1;
+  static const int _lh_element_type_mask       = right_n_bits(BitsPerByte);  // shifted mask
+  static const int _lh_header_size_shift       = BitsPerByte*2;
+  static const int _lh_header_size_mask        = right_n_bits(BitsPerByte);  // shifted mask
+  static const int _lh_array_tag_bits          = 2;
+  static const int _lh_array_tag_shift         = BitsPerInt - _lh_array_tag_bits;
+  static const int _lh_array_tag_obj_value     = ~0x01;   // 0x80000000 >> 30
 
   static const unsigned int _lh_array_tag_type_value = 0Xffffffff; // ~0x00,  // 0xC0000000 >> 30
 

--- a/src/hotspot/share/prims/jvm.cpp	Tue Oct 22 11:32:19 2019 +0800
+++ b/src/hotspot/share/prims/jvm.cpp	Tue Oct 22 08:57:41 2019 +0200
@@ -2308,7 +2308,7 @@
     ConstantPool* cp = InstanceKlass::cast(k)->constants();
     for (int index = cp->length() - 1; index >= 0; index--) {
       constantTag tag = cp->tag_at(index);
-      types[index] = (tag.is_unresolved_klass()) ? JVM_CONSTANT_Class : tag.value();
+      types[index] = (tag.is_unresolved_klass()) ? (unsigned char) JVM_CONSTANT_Class : tag.value();
     }
   }
 JVM_END