Mercurial > jdk8-mips64-public > hotspot / file comparison
comparison: src/share/vm/opto/memnode.cpp
src/share/vm/opto/memnode.cpp
- changeset 4142
- d8ce2825b193
- parent 4115
- e626685e9f6c
- child 4164
- d804e148cff8
equal
deleted
inserted
replaced
| 4122:1b582b1bf7cb | 4142:d8ce2825b193 |
|---|---|
| 1669 ciKlass *ss = klass->super_of_depth(depth); | 1669 ciKlass *ss = klass->super_of_depth(depth); |
| 1670 return ss ? TypeKlassPtr::make(ss) : TypePtr::NULL_PTR; | 1670 return ss ? TypeKlassPtr::make(ss) : TypePtr::NULL_PTR; |
| 1671 } | 1671 } |
| 1672 const Type* aift = load_array_final_field(tkls, klass); | 1672 const Type* aift = load_array_final_field(tkls, klass); |
| 1673 if (aift != NULL) return aift; | 1673 if (aift != NULL) return aift; |
| 1674 if (tkls->offset() == in_bytes(arrayKlass::component_mirror_offset()) | 1674 if (tkls->offset() == in_bytes(ArrayKlass::component_mirror_offset()) |
| 1675 && klass->is_array_klass()) { | 1675 && klass->is_array_klass()) { |
| 1676 // The field is arrayKlass::_component_mirror. Return its (constant) value. | 1676 // The field is ArrayKlass::_component_mirror. Return its (constant) value. |
| 1677 // (Folds up aClassConstant.getComponentType, common in Arrays.copyOf.) | 1677 // (Folds up aClassConstant.getComponentType, common in Arrays.copyOf.) |
| 1678 assert(Opcode() == Op_LoadP, "must load an oop from _component_mirror"); | 1678 assert(Opcode() == Op_LoadP, "must load an oop from _component_mirror"); |
| 1679 return TypeInstPtr::make(klass->as_array_klass()->component_mirror()); | 1679 return TypeInstPtr::make(klass->as_array_klass()->component_mirror()); |
| 1680 } | 1680 } |
| 1681 if (tkls->offset() == in_bytes(Klass::java_mirror_offset())) { | 1681 if (tkls->offset() == in_bytes(Klass::java_mirror_offset())) { |
| 2012 if (tkls != NULL && !StressReflectiveCode) { | 2012 if (tkls != NULL && !StressReflectiveCode) { |
| 2013 ciKlass* klass = tkls->klass(); | 2013 ciKlass* klass = tkls->klass(); |
| 2014 if( !klass->is_loaded() ) | 2014 if( !klass->is_loaded() ) |
| 2015 return _type; // Bail out if not loaded | 2015 return _type; // Bail out if not loaded |
| 2016 if( klass->is_obj_array_klass() && | 2016 if( klass->is_obj_array_klass() && |
| 2017 tkls->offset() == in_bytes(objArrayKlass::element_klass_offset())) { | 2017 tkls->offset() == in_bytes(ObjArrayKlass::element_klass_offset())) { |
| 2018 ciKlass* elem = klass->as_obj_array_klass()->element_klass(); | 2018 ciKlass* elem = klass->as_obj_array_klass()->element_klass(); |
| 2019 // // Always returning precise element type is incorrect, | 2019 // // Always returning precise element type is incorrect, |
| 2020 // // e.g., element type could be object and array may contain strings | 2020 // // e.g., element type could be object and array may contain strings |
| 2021 // return TypeKlassPtr::make(TypePtr::Constant, elem, 0); | 2021 // return TypeKlassPtr::make(TypePtr::Constant, elem, 0); |
| 2022 | 2022 |
| 2065 return allocated_klass; | 2065 return allocated_klass; |
| 2066 } | 2066 } |
| 2067 } | 2067 } |
| 2068 | 2068 |
| 2069 // Simplify k.java_mirror.as_klass to plain k, where k is a Klass*. | 2069 // Simplify k.java_mirror.as_klass to plain k, where k is a Klass*. |
| 2070 // Simplify ak.component_mirror.array_klass to plain ak, ak an arrayKlass. | 2070 // Simplify ak.component_mirror.array_klass to plain ak, ak an ArrayKlass. |
| 2071 // See inline_native_Class_query for occurrences of these patterns. | 2071 // See inline_native_Class_query for occurrences of these patterns. |
| 2072 // Java Example: x.getClass().isAssignableFrom(y) | 2072 // Java Example: x.getClass().isAssignableFrom(y) |
| 2073 // Java Example: Array.newInstance(x.getClass().getComponentType(), n) | 2073 // Java Example: Array.newInstance(x.getClass().getComponentType(), n) |
| 2074 // | 2074 // |
| 2075 // This improves reflective code, often making the Class | 2075 // This improves reflective code, often making the Class |
| 2078 // introducing a new debug info operator for Klass*.java_mirror). | 2078 // introducing a new debug info operator for Klass*.java_mirror). |
| 2079 if (toop->isa_instptr() && toop->klass() == phase->C->env()->Class_klass() | 2079 if (toop->isa_instptr() && toop->klass() == phase->C->env()->Class_klass() |
| 2080 && (offset == java_lang_Class::klass_offset_in_bytes() || | 2080 && (offset == java_lang_Class::klass_offset_in_bytes() || |
| 2081 offset == java_lang_Class::array_klass_offset_in_bytes())) { | 2081 offset == java_lang_Class::array_klass_offset_in_bytes())) { |
| 2082 // We are loading a special hidden field from a Class mirror, | 2082 // We are loading a special hidden field from a Class mirror, |
| 2083 // the field which points to its Klass or arrayKlass metaobject. | 2083 // the field which points to its Klass or ArrayKlass metaobject. |
| 2084 if (base->is_Load()) { | 2084 if (base->is_Load()) { |
| 2085 Node* adr2 = base->in(MemNode::Address); | 2085 Node* adr2 = base->in(MemNode::Address); |
| 2086 const TypeKlassPtr* tkls = phase->type(adr2)->isa_klassptr(); | 2086 const TypeKlassPtr* tkls = phase->type(adr2)->isa_klassptr(); |
| 2087 if (tkls != NULL && !tkls->empty() | 2087 if (tkls != NULL && !tkls->empty() |
| 2088 && (tkls->klass()->is_instance_klass() || | 2088 && (tkls->klass()->is_instance_klass() || |
| 2089 tkls->klass()->is_array_klass()) | 2089 tkls->klass()->is_array_klass()) |
| 2090 && adr2->is_AddP() | 2090 && adr2->is_AddP() |
| 2091 ) { | 2091 ) { |
| 2092 int mirror_field = in_bytes(Klass::java_mirror_offset()); | 2092 int mirror_field = in_bytes(Klass::java_mirror_offset()); |
| 2093 if (offset == java_lang_Class::array_klass_offset_in_bytes()) { | 2093 if (offset == java_lang_Class::array_klass_offset_in_bytes()) { |
| 2094 mirror_field = in_bytes(arrayKlass::component_mirror_offset()); | 2094 mirror_field = in_bytes(ArrayKlass::component_mirror_offset()); |
| 2095 } | 2095 } |
| 2096 if (tkls->offset() == mirror_field) { | 2096 if (tkls->offset() == mirror_field) { |
| 2097 return adr2->in(AddPNode::Base); | 2097 return adr2->in(AddPNode::Base); |
| 2098 } | 2098 } |
| 2099 } | 2099 } |
