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8054492: Casting can result in redundant null checks in generated code

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Add C2 intrinsic for Class.cast() method and force inline it too.

Reviewed-by: jrose, roland, drchase, iignatyev
This commit is contained in:
Vladimir Kozlov 2014-10-31 16:51:57 -07:00
parent daf2fd0593
commit 74def215cd
7 changed files with 451 additions and 4 deletions
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3
hotspot/src/share/vm/classfile/vmSymbols.hpp
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@ -455,6 +455,7 @@
template(object_void_signature, "(Ljava/lang/Object;)V") \
template(object_int_signature, "(Ljava/lang/Object;)I") \
template(object_boolean_signature, "(Ljava/lang/Object;)Z") \
template(object_object_signature, "(Ljava/lang/Object;)Ljava/lang/Object;") \
template(string_void_signature, "(Ljava/lang/String;)V") \
template(string_int_signature, "(Ljava/lang/String;)I") \
template(throwable_void_signature, "(Ljava/lang/Throwable;)V") \
@ -746,6 +747,8 @@
do_name( isPrimitive_name, "isPrimitive") \
do_intrinsic(_getSuperclass, java_lang_Class, getSuperclass_name, void_class_signature, F_RN) \
do_name( getSuperclass_name, "getSuperclass") \
do_intrinsic(_Class_cast, java_lang_Class, Class_cast_name, object_object_signature, F_R) \
do_name( Class_cast_name, "cast") \
\
do_intrinsic(_getClassAccessFlags, sun_reflect_Reflection, getClassAccessFlags_name, class_int_signature, F_SN) \
do_name( getClassAccessFlags_name, "getClassAccessFlags") \