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comparison src/share/vm/opto/graphKit.cpp @ 6057:8f972594effc

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6924259: Remove String.count/String.offset Summary: Allow a version of String class that doesn't have count and offset fields. Reviewed-by: never, coleenp
author kvn
date Mon, 14 May 2012 09:36:00 -0700
parents b9bc6cae88f2
children 1d7922586cf6
comparison
equal deleted inserted replaced
6054:56d1af561395 6057:8f972594effc
1 /* 1 /*
2 * Copyright (c) 2001, 2011, Oracle and/or its affiliates. All rights reserved. 2 * Copyright (c) 2001, 2012, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 * 4 *
5 * This code is free software; you can redistribute it and/or modify it 5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as 6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation. 7 * published by the Free Software Foundation.
3746 3746
3747 // Final sync IdealKit and GraphKit. 3747 // Final sync IdealKit and GraphKit.
3748 final_sync(ideal); 3748 final_sync(ideal);
3749 } 3749 }
3750 #undef __ 3750 #undef __
3751
3752
3753
3754 Node* GraphKit::load_String_offset(Node* ctrl, Node* str) {
3755 if (java_lang_String::has_offset_field()) {
3756 int offset_offset = java_lang_String::offset_offset_in_bytes();
3757 const TypeInstPtr* string_type = TypeInstPtr::make(TypePtr::NotNull, C->env()->String_klass(),
3758 false, NULL, 0);
3759 const TypePtr* offset_field_type = string_type->add_offset(offset_offset);
3760 int offset_field_idx = C->get_alias_index(offset_field_type);
3761 return make_load(ctrl,
3762 basic_plus_adr(str, str, offset_offset),
3763 TypeInt::INT, T_INT, offset_field_idx);
3764 } else {
3765 return intcon(0);
3766 }
3767 }
3768
3769 Node* GraphKit::load_String_length(Node* ctrl, Node* str) {
3770 if (java_lang_String::has_count_field()) {
3771 int count_offset = java_lang_String::count_offset_in_bytes();
3772 const TypeInstPtr* string_type = TypeInstPtr::make(TypePtr::NotNull, C->env()->String_klass(),
3773 false, NULL, 0);
3774 const TypePtr* count_field_type = string_type->add_offset(count_offset);
3775 int count_field_idx = C->get_alias_index(count_field_type);
3776 return make_load(ctrl,
3777 basic_plus_adr(str, str, count_offset),
3778 TypeInt::INT, T_INT, count_field_idx);
3779 } else {
3780 return load_array_length(load_String_value(ctrl, str));
3781 }
3782 }
3783
3784 Node* GraphKit::load_String_value(Node* ctrl, Node* str) {
3785 int value_offset = java_lang_String::value_offset_in_bytes();
3786 const TypeInstPtr* string_type = TypeInstPtr::make(TypePtr::NotNull, C->env()->String_klass(),
3787 false, NULL, 0);
3788 const TypePtr* value_field_type = string_type->add_offset(value_offset);
3789 const TypeAryPtr* value_type = TypeAryPtr::make(TypePtr::NotNull,
3790 TypeAry::make(TypeInt::CHAR,TypeInt::POS),
3791 ciTypeArrayKlass::make(T_CHAR), true, 0);
3792 int value_field_idx = C->get_alias_index(value_field_type);
3793 return make_load(ctrl, basic_plus_adr(str, str, value_offset),
3794 value_type, T_OBJECT, value_field_idx);
3795 }
3796
3797 void GraphKit::store_String_offset(Node* ctrl, Node* str, Node* value) {
3798 int offset_offset = java_lang_String::offset_offset_in_bytes();
3799 const TypeInstPtr* string_type = TypeInstPtr::make(TypePtr::NotNull, C->env()->String_klass(),
3800 false, NULL, 0);
3801 const TypePtr* offset_field_type = string_type->add_offset(offset_offset);
3802 int offset_field_idx = C->get_alias_index(offset_field_type);
3803 store_to_memory(ctrl, basic_plus_adr(str, offset_offset),
3804 value, T_INT, offset_field_idx);
3805 }
3806
3807 void GraphKit::store_String_value(Node* ctrl, Node* str, Node* value) {
3808 int value_offset = java_lang_String::value_offset_in_bytes();
3809 const TypeInstPtr* string_type = TypeInstPtr::make(TypePtr::NotNull, C->env()->String_klass(),
3810 false, NULL, 0);
3811 const TypePtr* value_field_type = string_type->add_offset(value_offset);
3812 const TypeAryPtr* value_type = TypeAryPtr::make(TypePtr::NotNull,
3813 TypeAry::make(TypeInt::CHAR,TypeInt::POS),
3814 ciTypeArrayKlass::make(T_CHAR), true, 0);
3815 int value_field_idx = C->get_alias_index(value_field_type);
3816 store_to_memory(ctrl, basic_plus_adr(str, value_offset),
3817 value, T_OBJECT, value_field_idx);
3818 }
3819
3820 void GraphKit::store_String_length(Node* ctrl, Node* str, Node* value) {
3821 int count_offset = java_lang_String::count_offset_in_bytes();
3822 const TypeInstPtr* string_type = TypeInstPtr::make(TypePtr::NotNull, C->env()->String_klass(),
3823 false, NULL, 0);
3824 const TypePtr* count_field_type = string_type->add_offset(count_offset);
3825 int count_field_idx = C->get_alias_index(count_field_type);
3826 store_to_memory(ctrl, basic_plus_adr(str, count_offset),
3827 value, T_INT, count_field_idx);
3828 }