Mercurial > hg > truffle

comparison src/share/vm/opto/parse3.cpp @ 1138:dd57230ba8fe

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
6893268: additional dynamic language related optimizations in C2 Summary: C2 needs some additional optimizations to be able to handle MethodHandle invokes and invokedynamic instructions at the best performance. Reviewed-by: kvn, never
author twisti
date Tue, 05 Jan 2010 15:21:25 +0100
parents f96a1a986f7b
children f516d5d7a019
comparison
equal deleted inserted replaced
1137:97125851f396 1138:dd57230ba8fe
123 } 123 }
124 124
125 125
126 void Parse::do_get_xxx(const TypePtr* obj_type, Node* obj, ciField* field, bool is_field) { 126 void Parse::do_get_xxx(const TypePtr* obj_type, Node* obj, ciField* field, bool is_field) {
127 // Does this field have a constant value? If so, just push the value. 127 // Does this field have a constant value? If so, just push the value.
128 if (field->is_constant() && push_constant(field->constant_value())) return; 128 if (field->is_constant()) {
129 if (field->is_static()) {
130 // final static field
131 if (push_constant(field->constant_value()))
132 return;
133 }
134 else {
135 // final non-static field of a trusted class ({java,sun}.dyn
136 // classes).
137 if (obj->is_Con()) {
138 const TypeOopPtr* oop_ptr = obj->bottom_type()->isa_oopptr();
139 ciObject* constant_oop = oop_ptr->const_oop();
140 ciConstant constant = field->constant_value_of(constant_oop);
141
142 if (push_constant(constant, true))
143 return;
144 }
145 }
146 }
129 147
130 ciType* field_klass = field->type(); 148 ciType* field_klass = field->type();
131 bool is_vol = field->is_volatile(); 149 bool is_vol = field->is_volatile();
132 150
133 // Compute address and memory type. 151 // Compute address and memory type.
143 161
144 if( bt == T_OBJECT ) { 162 if( bt == T_OBJECT ) {
145 if (!field->type()->is_loaded()) { 163 if (!field->type()->is_loaded()) {
146 type = TypeInstPtr::BOTTOM; 164 type = TypeInstPtr::BOTTOM;
147 must_assert_null = true; 165 must_assert_null = true;
148 } else if (field->is_constant()) { 166 } else if (field->is_constant() && field->is_static()) {
149 // This can happen if the constant oop is non-perm. 167 // This can happen if the constant oop is non-perm.
150 ciObject* con = field->constant_value().as_object(); 168 ciObject* con = field->constant_value().as_object();
151 // Do not "join" in the previous type; it doesn't add value, 169 // Do not "join" in the previous type; it doesn't add value,
152 // and may yield a vacuous result if the field is of interface type. 170 // and may yield a vacuous result if the field is of interface type.
153 type = TypeOopPtr::make_from_constant(con)->isa_oopptr(); 171 type = TypeOopPtr::make_from_constant(con)->isa_oopptr();