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comparison src/share/vm/opto/memnode.cpp @ 1766:02f0a9b6f654

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6969586: OptimizeStringConcat: SIGSEGV in LoadNode::Value() Reviewed-by: kvn
author never
date Mon, 30 Aug 2010 17:27:35 -0700
parents 4311f23817fd
children 5867d89c129b
comparison
equal deleted inserted replaced
1765:114e6b93e9e1 1766:02f0a9b6f654
1545 // For oop loads, we expect the _type to be precise 1545 // For oop loads, we expect the _type to be precise
1546 if (OptimizeStringConcat && klass == phase->C->env()->String_klass() && 1546 if (OptimizeStringConcat && klass == phase->C->env()->String_klass() &&
1547 adr->is_AddP() && off != Type::OffsetBot) { 1547 adr->is_AddP() && off != Type::OffsetBot) {
1548 // For constant Strings treat the fields as compile time constants. 1548 // For constant Strings treat the fields as compile time constants.
1549 Node* base = adr->in(AddPNode::Base); 1549 Node* base = adr->in(AddPNode::Base);
1550 if (base->Opcode() == Op_ConP) { 1550 const TypeOopPtr* t = phase->type(base)->isa_oopptr();
1551 const TypeOopPtr* t = phase->type(base)->isa_oopptr(); 1551 if (t != NULL && t->singleton()) {
1552 ciObject* string = t->const_oop(); 1552 ciObject* string = t->const_oop();
1553 ciConstant constant = string->as_instance()->field_value_by_offset(off); 1553 ciConstant constant = string->as_instance()->field_value_by_offset(off);
1554 if (constant.basic_type() == T_INT) { 1554 if (constant.basic_type() == T_INT) {
1555 return TypeInt::make(constant.as_int()); 1555 return TypeInt::make(constant.as_int());
1556 } else if (constant.basic_type() == T_ARRAY) { 1556 } else if (constant.basic_type() == T_ARRAY) {