Mercurial > hg > truffle
diff src/share/vm/runtime/vmStructs.cpp @ 4737:75c0a73eee98
7102776: Pack instanceKlass boolean fields into single u1 field
Summary: Reduce class runtime memory usage by packing 4 instanceKlass boolean fields into single u1 field. Save 4-byte for each loaded class.
Reviewed-by: dholmes, bobv, phh, twisti, never, coleenp
Contributed-by: Jiangli Zhou <jiangli.zhou@oracle.com>
| author | coleenp |
|---|---|
| date | Thu, 17 Nov 2011 12:53:59 -0500 |
| parents | fd65bc7c09b6 |
| children | 52b5d32fbfaf |
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--- a/src/share/vm/runtime/vmStructs.cpp Fri Nov 04 14:06:09 2011 -0700 +++ b/src/share/vm/runtime/vmStructs.cpp Thu Nov 17 12:53:59 2011 -0500 @@ -307,7 +307,7 @@ nonstatic_field(instanceKlass, _static_field_size, int) \ nonstatic_field(instanceKlass, _static_oop_field_count, int) \ nonstatic_field(instanceKlass, _nonstatic_oop_map_size, int) \ - nonstatic_field(instanceKlass, _is_marked_dependent, bool) \ + nonstatic_field(instanceKlass, _misc_flags, u1) \ nonstatic_field(instanceKlass, _minor_version, u2) \ nonstatic_field(instanceKlass, _major_version, u2) \ nonstatic_field(instanceKlass, _init_state, instanceKlass::ClassState) \ @@ -1362,6 +1362,7 @@ /* The compiler thinks this is a different type than */ \ /* unsigned short on Win32 */ \ declare_unsigned_integer_type(u2) \ + declare_unsigned_integer_type(u1) \ declare_unsigned_integer_type(unsigned) \ \ /*****************************/ \ @@ -2385,6 +2386,7 @@ declare_constant(instanceKlass::being_initialized) \ declare_constant(instanceKlass::fully_initialized) \ declare_constant(instanceKlass::initialization_error) \ + declare_constant(instanceKlass::IS_MARKED_DEPENDENT) \ \ /*********************************/ \ /* Symbol* - symbol max length */ \