Mercurial > hg > openjdk > icedtea > jdk7 > hotspot
changeset 3497:3facbb14e873
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 | ea3152ff2a49 |
| children | c4b58f8eeeaf 3f1e457eda51 e61e3c378ed4 |
| files | src/cpu/sparc/vm/c1_LIRAssembler_sparc.cpp src/cpu/x86/vm/c1_LIRAssembler_x86.cpp src/share/vm/classfile/javaClasses.cpp src/share/vm/classfile/javaClasses.hpp src/share/vm/classfile/systemDictionary.cpp src/share/vm/classfile/vmSymbols.hpp src/share/vm/memory/dump.cpp src/share/vm/opto/graphKit.cpp src/share/vm/opto/graphKit.hpp src/share/vm/opto/library_call.cpp src/share/vm/opto/stringopts.cpp src/share/vm/opto/stringopts.hpp |
| diffstat | 12 files changed, 370 insertions(+), 196 deletions(-) [+] |
line wrap: on
line diff
--- a/src/cpu/sparc/vm/c1_LIRAssembler_sparc.cpp Fri May 18 15:50:09 2012 +0200 +++ b/src/cpu/sparc/vm/c1_LIRAssembler_sparc.cpp Mon May 14 09:36:00 2012 -0700 @@ -1,5 +1,5 @@ /* - * Copyright (c) 2000, 2011, Oracle and/or its affiliates. All rights reserved. + * Copyright (c) 2000, 2012, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it @@ -238,9 +238,12 @@ Register result = dst->as_register(); { - // Get a pointer to the first character of string0 in tmp0 and get string0.count in str0 - // Get a pointer to the first character of string1 in tmp1 and get string1.count in str1 - // Also, get string0.count-string1.count in o7 and get the condition code set + // Get a pointer to the first character of string0 in tmp0 + // and get string0.length() in str0 + // Get a pointer to the first character of string1 in tmp1 + // and get string1.length() in str1 + // Also, get string0.length()-string1.length() in + // o7 and get the condition code set // Note: some instructions have been hoisted for better instruction scheduling Register tmp0 = L0; @@ -248,27 +251,40 @@ Register tmp2 = L2; int value_offset = java_lang_String:: value_offset_in_bytes(); // char array - int offset_offset = java_lang_String::offset_offset_in_bytes(); // first character position - int count_offset = java_lang_String:: count_offset_in_bytes(); - - __ load_heap_oop(str0, value_offset, tmp0); - __ ld(str0, offset_offset, tmp2); - __ add(tmp0, arrayOopDesc::base_offset_in_bytes(T_CHAR), tmp0); - __ ld(str0, count_offset, str0); - __ sll(tmp2, exact_log2(sizeof(jchar)), tmp2); + if (java_lang_String::has_offset_field()) { + int offset_offset = java_lang_String::offset_offset_in_bytes(); // first character position + int count_offset = java_lang_String:: count_offset_in_bytes(); + __ load_heap_oop(str0, value_offset, tmp0); + __ ld(str0, offset_offset, tmp2); + __ add(tmp0, arrayOopDesc::base_offset_in_bytes(T_CHAR), tmp0); + __ ld(str0, count_offset, str0); + __ sll(tmp2, exact_log2(sizeof(jchar)), tmp2); + } else { + __ load_heap_oop(str0, value_offset, tmp1); + __ add(tmp1, arrayOopDesc::base_offset_in_bytes(T_CHAR), tmp0); + __ ld(tmp1, arrayOopDesc::length_offset_in_bytes(), str0); + } // str1 may be null add_debug_info_for_null_check_here(info); - __ load_heap_oop(str1, value_offset, tmp1); - __ add(tmp0, tmp2, tmp0); - - __ ld(str1, offset_offset, tmp2); - __ add(tmp1, arrayOopDesc::base_offset_in_bytes(T_CHAR), tmp1); - __ ld(str1, count_offset, str1); - __ sll(tmp2, exact_log2(sizeof(jchar)), tmp2); + if (java_lang_String::has_offset_field()) { + int offset_offset = java_lang_String::offset_offset_in_bytes(); // first character position + int count_offset = java_lang_String:: count_offset_in_bytes(); + __ load_heap_oop(str1, value_offset, tmp1); + __ add(tmp0, tmp2, tmp0); + + __ ld(str1, offset_offset, tmp2); + __ add(tmp1, arrayOopDesc::base_offset_in_bytes(T_CHAR), tmp1); + __ ld(str1, count_offset, str1); + __ sll(tmp2, exact_log2(sizeof(jchar)), tmp2); + __ add(tmp1, tmp2, tmp1); + } else { + __ load_heap_oop(str1, value_offset, tmp2); + __ add(tmp2, arrayOopDesc::base_offset_in_bytes(T_CHAR), tmp1); + __ ld(tmp2, arrayOopDesc::length_offset_in_bytes(), str1); + } __ subcc(str0, str1, O7); - __ add(tmp1, tmp2, tmp1); } { @@ -302,7 +318,7 @@ // Shift base0 and base1 to the end of the arrays, negate limit __ add(base0, limit, base0); __ add(base1, limit, base1); - __ neg(limit); // limit = -min{string0.count, strin1.count} + __ neg(limit); // limit = -min{string0.length(), string1.length()} __ lduh(base0, limit, chr0); __ bind(Lloop);
--- a/src/cpu/x86/vm/c1_LIRAssembler_x86.cpp Fri May 18 15:50:09 2012 +0200 +++ b/src/cpu/x86/vm/c1_LIRAssembler_x86.cpp Mon May 14 09:36:00 2012 -0700 @@ -1,5 +1,5 @@ /* - * Copyright (c) 2000, 2011, Oracle and/or its affiliates. All rights reserved. + * Copyright (c) 2000, 2012, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it @@ -505,19 +505,28 @@ // Get addresses of first characters from both Strings __ load_heap_oop(rsi, Address(rax, java_lang_String::value_offset_in_bytes())); - __ movptr (rcx, Address(rax, java_lang_String::offset_offset_in_bytes())); - __ lea (rsi, Address(rsi, rcx, Address::times_2, arrayOopDesc::base_offset_in_bytes(T_CHAR))); - + if (java_lang_String::has_offset_field()) { + __ movptr (rcx, Address(rax, java_lang_String::offset_offset_in_bytes())); + __ movl (rax, Address(rax, java_lang_String::count_offset_in_bytes())); + __ lea (rsi, Address(rsi, rcx, Address::times_2, arrayOopDesc::base_offset_in_bytes(T_CHAR))); + } else { + __ movl (rax, Address(rsi, arrayOopDesc::length_offset_in_bytes())); + __ lea (rsi, Address(rsi, arrayOopDesc::base_offset_in_bytes(T_CHAR))); + } // rbx, may be NULL add_debug_info_for_null_check_here(info); __ load_heap_oop(rdi, Address(rbx, java_lang_String::value_offset_in_bytes())); - __ movptr (rcx, Address(rbx, java_lang_String::offset_offset_in_bytes())); - __ lea (rdi, Address(rdi, rcx, Address::times_2, arrayOopDesc::base_offset_in_bytes(T_CHAR))); + if (java_lang_String::has_offset_field()) { + __ movptr (rcx, Address(rbx, java_lang_String::offset_offset_in_bytes())); + __ movl (rbx, Address(rbx, java_lang_String::count_offset_in_bytes())); + __ lea (rdi, Address(rdi, rcx, Address::times_2, arrayOopDesc::base_offset_in_bytes(T_CHAR))); + } else { + __ movl (rbx, Address(rdi, arrayOopDesc::length_offset_in_bytes())); + __ lea (rdi, Address(rdi, arrayOopDesc::base_offset_in_bytes(T_CHAR))); + } // compute minimum length (in rax) and difference of lengths (on top of stack) - __ movl (rbx, Address(rbx, java_lang_String::count_offset_in_bytes())); - __ movl (rax, Address(rax, java_lang_String::count_offset_in_bytes())); __ mov (rcx, rbx); __ subptr(rbx, rax); // subtract lengths __ push (rbx); // result
--- a/src/share/vm/classfile/javaClasses.cpp Fri May 18 15:50:09 2012 +0200 +++ b/src/share/vm/classfile/javaClasses.cpp Mon May 14 09:36:00 2012 -0700 @@ -1,5 +1,5 @@ /* - * Copyright (c) 1997, 2011, Oracle and/or its affiliates. All rights reserved. + * Copyright (c) 1997, 2012, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it @@ -143,7 +143,27 @@ } +int java_lang_String::value_offset = 0; +int java_lang_String::offset_offset = 0; +int java_lang_String::count_offset = 0; +int java_lang_String::hash_offset = 0; + +bool java_lang_String::initialized = false; + +void java_lang_String::compute_offsets() { + assert(!initialized, "offsets should be initialized only once"); + + klassOop k = SystemDictionary::String_klass(); + compute_offset(value_offset, k, vmSymbols::value_name(), vmSymbols::char_array_signature()); + compute_optional_offset(offset_offset, k, vmSymbols::offset_name(), vmSymbols::int_signature()); + compute_optional_offset(count_offset, k, vmSymbols::count_name(), vmSymbols::int_signature()); + compute_optional_offset(hash_offset, k, vmSymbols::hash_name(), vmSymbols::int_signature()); + + initialized = true; +} + Handle java_lang_String::basic_create(int length, bool tenured, TRAPS) { + assert(initialized, "Must be initialized"); // Create the String object first, so there's a chance that the String // and the char array it points to end up in the same cache line. oop obj; @@ -2837,10 +2857,6 @@ -int java_lang_String::value_offset; -int java_lang_String::offset_offset; -int java_lang_String::count_offset; -int java_lang_String::hash_offset; int java_lang_Class::_klass_offset; int java_lang_Class::_array_klass_offset; int java_lang_Class::_resolved_constructor_offset; @@ -3000,12 +3016,6 @@ const int x = heapOopSize; const int header = instanceOopDesc::base_offset_in_bytes(); - // Do the String Class - java_lang_String::value_offset = java_lang_String::hc_value_offset * x + header; - java_lang_String::offset_offset = java_lang_String::hc_offset_offset * x + header; - java_lang_String::count_offset = java_lang_String::offset_offset + sizeof (jint); - java_lang_String::hash_offset = java_lang_String::count_offset + sizeof (jint); - // Throwable Class java_lang_Throwable::backtrace_offset = java_lang_Throwable::hc_backtrace_offset * x + header; java_lang_Throwable::detailMessage_offset = java_lang_Throwable::hc_detailMessage_offset * x + header; @@ -3200,9 +3210,13 @@ // java.lang.String CHECK_OFFSET("java/lang/String", java_lang_String, value, "[C"); - CHECK_OFFSET("java/lang/String", java_lang_String, offset, "I"); - CHECK_OFFSET("java/lang/String", java_lang_String, count, "I"); - CHECK_OFFSET("java/lang/String", java_lang_String, hash, "I"); + if (java_lang_String::has_offset_field()) { + CHECK_OFFSET("java/lang/String", java_lang_String, offset, "I"); + CHECK_OFFSET("java/lang/String", java_lang_String, count, "I"); + } + if (java_lang_String::has_hash_field()) { + CHECK_OFFSET("java/lang/String", java_lang_String, hash, "I"); + } // java.lang.Class
--- a/src/share/vm/classfile/javaClasses.hpp Fri May 18 15:50:09 2012 +0200 +++ b/src/share/vm/classfile/javaClasses.hpp Mon May 14 09:36:00 2012 -0700 @@ -1,5 +1,5 @@ /* - * Copyright (c) 1997, 2011, Oracle and/or its affiliates. All rights reserved. + * Copyright (c) 1997, 2012, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it @@ -52,26 +52,36 @@ class java_lang_String : AllStatic { private: - enum { - hc_value_offset = 0, - hc_offset_offset = 1 - //hc_count_offset = 2 -- not a word-scaled offset - //hc_hash_offset = 3 -- not a word-scaled offset - }; - static int value_offset; static int offset_offset; static int count_offset; static int hash_offset; + static bool initialized; + static Handle basic_create(int length, bool tenured, TRAPS); static Handle basic_create_from_unicode(jchar* unicode, int length, bool tenured, TRAPS); - static void set_value( oop string, typeArrayOop buffer) { string->obj_field_put(value_offset, (oop)buffer); } - static void set_offset(oop string, int offset) { string->int_field_put(offset_offset, offset); } - static void set_count( oop string, int count) { string->int_field_put(count_offset, count); } + static void set_value( oop string, typeArrayOop buffer) { + assert(initialized, "Must be initialized"); + string->obj_field_put(value_offset, (oop)buffer); + } + static void set_offset(oop string, int offset) { + assert(initialized, "Must be initialized"); + if (offset_offset > 0) { + string->int_field_put(offset_offset, offset); + } + } + static void set_count( oop string, int count) { + assert(initialized, "Must be initialized"); + if (count_offset > 0) { + string->int_field_put(count_offset, count); + } + } public: + static void compute_offsets(); + // Instance creation static Handle create_from_unicode(jchar* unicode, int len, TRAPS); static Handle create_tenured_from_unicode(jchar* unicode, int len, TRAPS); @@ -82,23 +92,61 @@ static Handle create_from_platform_dependent_str(const char* str, TRAPS); static Handle char_converter(Handle java_string, jchar from_char, jchar to_char, TRAPS); - static int value_offset_in_bytes() { return value_offset; } - static int count_offset_in_bytes() { return count_offset; } - static int offset_offset_in_bytes() { return offset_offset; } - static int hash_offset_in_bytes() { return hash_offset; } + static bool has_offset_field() { + assert(initialized, "Must be initialized"); + return (offset_offset > 0); + } + + static bool has_count_field() { + assert(initialized, "Must be initialized"); + return (count_offset > 0); + } + + static bool has_hash_field() { + assert(initialized, "Must be initialized"); + return (hash_offset > 0); + } + + static int value_offset_in_bytes() { + assert(initialized && (value_offset > 0), "Must be initialized"); + return value_offset; + } + static int count_offset_in_bytes() { + assert(initialized && (count_offset > 0), "Must be initialized"); + return count_offset; + } + static int offset_offset_in_bytes() { + assert(initialized && (offset_offset > 0), "Must be initialized"); + return offset_offset; + } + static int hash_offset_in_bytes() { + assert(initialized && (hash_offset > 0), "Must be initialized"); + return hash_offset; + } // Accessors static typeArrayOop value(oop java_string) { + assert(initialized && (value_offset > 0), "Must be initialized"); assert(is_instance(java_string), "must be java_string"); return (typeArrayOop) java_string->obj_field(value_offset); } static int offset(oop java_string) { + assert(initialized, "Must be initialized"); assert(is_instance(java_string), "must be java_string"); - return java_string->int_field(offset_offset); + if (offset_offset > 0) { + return java_string->int_field(offset_offset); + } else { + return 0; + } } static int length(oop java_string) { + assert(initialized, "Must be initialized"); assert(is_instance(java_string), "must be java_string"); - return java_string->int_field(count_offset); + if (count_offset > 0) { + return java_string->int_field(count_offset); + } else { + return ((typeArrayOop)java_string->obj_field(value_offset))->length(); + } } static int utf8_length(oop java_string);
--- a/src/share/vm/classfile/systemDictionary.cpp Fri May 18 15:50:09 2012 +0200 +++ b/src/share/vm/classfile/systemDictionary.cpp Mon May 14 09:36:00 2012 -0700 @@ -1971,6 +1971,9 @@ // first do Object, String, Class initialize_wk_klasses_through(WK_KLASS_ENUM_NAME(Class_klass), scan, CHECK); + // Calculate offsets for String and Class classes since they are loaded and + // can be used after this point. + java_lang_String::compute_offsets(); java_lang_Class::compute_offsets(); // Fixup mirrors for classes loaded before java.lang.Class.
--- a/src/share/vm/classfile/vmSymbols.hpp Fri May 18 15:50:09 2012 +0200 +++ b/src/share/vm/classfile/vmSymbols.hpp Mon May 14 09:36:00 2012 -0700 @@ -339,6 +339,9 @@ template(park_event_name, "nativeParkEventPointer") \ template(cache_field_name, "cache") \ template(value_name, "value") \ + template(offset_name, "offset") \ + template(count_name, "count") \ + template(hash_name, "hash") \ template(frontCacheEnabled_name, "frontCacheEnabled") \ template(stringCacheEnabled_name, "stringCacheEnabled") \ template(numberOfLeadingZeros_name, "numberOfLeadingZeros") \
--- a/src/share/vm/memory/dump.cpp Fri May 18 15:50:09 2012 +0200 +++ b/src/share/vm/memory/dump.cpp Mon May 14 09:36:00 2012 -0700 @@ -78,8 +78,8 @@ void do_oop(oop* p) { if (p != NULL) { oop obj = *p; - if (obj->klass() == SystemDictionary::String_klass()) { - + if (obj->klass() == SystemDictionary::String_klass() && + java_lang_String::has_hash_field()) { int hash = java_lang_String::hash_string(obj); obj->int_field_put(hash_offset, hash); }
--- a/src/share/vm/opto/graphKit.cpp Fri May 18 15:50:09 2012 +0200 +++ b/src/share/vm/opto/graphKit.cpp Mon May 14 09:36:00 2012 -0700 @@ -1,5 +1,5 @@ /* - * Copyright (c) 2001, 2011, Oracle and/or its affiliates. All rights reserved. + * Copyright (c) 2001, 2012, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it @@ -3748,3 +3748,81 @@ final_sync(ideal); } #undef __ + + + +Node* GraphKit::load_String_offset(Node* ctrl, Node* str) { + if (java_lang_String::has_offset_field()) { + int offset_offset = java_lang_String::offset_offset_in_bytes(); + const TypeInstPtr* string_type = TypeInstPtr::make(TypePtr::NotNull, C->env()->String_klass(), + false, NULL, 0); + const TypePtr* offset_field_type = string_type->add_offset(offset_offset); + int offset_field_idx = C->get_alias_index(offset_field_type); + return make_load(ctrl, + basic_plus_adr(str, str, offset_offset), + TypeInt::INT, T_INT, offset_field_idx); + } else { + return intcon(0); + } +} + +Node* GraphKit::load_String_length(Node* ctrl, Node* str) { + if (java_lang_String::has_count_field()) { + int count_offset = java_lang_String::count_offset_in_bytes(); + const TypeInstPtr* string_type = TypeInstPtr::make(TypePtr::NotNull, C->env()->String_klass(), + false, NULL, 0); + const TypePtr* count_field_type = string_type->add_offset(count_offset); + int count_field_idx = C->get_alias_index(count_field_type); + return make_load(ctrl, + basic_plus_adr(str, str, count_offset), + TypeInt::INT, T_INT, count_field_idx); + } else { + return load_array_length(load_String_value(ctrl, str)); + } +} + +Node* GraphKit::load_String_value(Node* ctrl, Node* str) { + int value_offset = java_lang_String::value_offset_in_bytes(); + const TypeInstPtr* string_type = TypeInstPtr::make(TypePtr::NotNull, C->env()->String_klass(), + false, NULL, 0); + const TypePtr* value_field_type = string_type->add_offset(value_offset); + const TypeAryPtr* value_type = TypeAryPtr::make(TypePtr::NotNull, + TypeAry::make(TypeInt::CHAR,TypeInt::POS), + ciTypeArrayKlass::make(T_CHAR), true, 0); + int value_field_idx = C->get_alias_index(value_field_type); + return make_load(ctrl, basic_plus_adr(str, str, value_offset), + value_type, T_OBJECT, value_field_idx); +} + +void GraphKit::store_String_offset(Node* ctrl, Node* str, Node* value) { + int offset_offset = java_lang_String::offset_offset_in_bytes(); + const TypeInstPtr* string_type = TypeInstPtr::make(TypePtr::NotNull, C->env()->String_klass(), + false, NULL, 0); + const TypePtr* offset_field_type = string_type->add_offset(offset_offset); + int offset_field_idx = C->get_alias_index(offset_field_type); + store_to_memory(ctrl, basic_plus_adr(str, offset_offset), + value, T_INT, offset_field_idx); +} + +void GraphKit::store_String_value(Node* ctrl, Node* str, Node* value) { + int value_offset = java_lang_String::value_offset_in_bytes(); + const TypeInstPtr* string_type = TypeInstPtr::make(TypePtr::NotNull, C->env()->String_klass(), + false, NULL, 0); + const TypePtr* value_field_type = string_type->add_offset(value_offset); + const TypeAryPtr* value_type = TypeAryPtr::make(TypePtr::NotNull, + TypeAry::make(TypeInt::CHAR,TypeInt::POS), + ciTypeArrayKlass::make(T_CHAR), true, 0); + int value_field_idx = C->get_alias_index(value_field_type); + store_to_memory(ctrl, basic_plus_adr(str, value_offset), + value, T_OBJECT, value_field_idx); +} + +void GraphKit::store_String_length(Node* ctrl, Node* str, Node* value) { + int count_offset = java_lang_String::count_offset_in_bytes(); + const TypeInstPtr* string_type = TypeInstPtr::make(TypePtr::NotNull, C->env()->String_klass(), + false, NULL, 0); + const TypePtr* count_field_type = string_type->add_offset(count_offset); + int count_field_idx = C->get_alias_index(count_field_type); + store_to_memory(ctrl, basic_plus_adr(str, count_offset), + value, T_INT, count_field_idx); +}
--- a/src/share/vm/opto/graphKit.hpp Fri May 18 15:50:09 2012 +0200 +++ b/src/share/vm/opto/graphKit.hpp Mon May 14 09:36:00 2012 -0700 @@ -1,5 +1,5 @@ /* - * Copyright (c) 2001, 2011, Oracle and/or its affiliates. All rights reserved. + * Copyright (c) 2001, 2012, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it @@ -781,6 +781,14 @@ Node* new_array(Node* klass_node, Node* count_val, int nargs, Node* *return_size_val = NULL); + // java.lang.String helpers + Node* load_String_offset(Node* ctrl, Node* str); + Node* load_String_length(Node* ctrl, Node* str); + Node* load_String_value(Node* ctrl, Node* str); + void store_String_offset(Node* ctrl, Node* str, Node* value); + void store_String_length(Node* ctrl, Node* str, Node* value); + void store_String_value(Node* ctrl, Node* str, Node* value); + // Handy for making control flow IfNode* create_and_map_if(Node* ctrl, Node* tst, float prob, float cnt) { IfNode* iff = new (C, 2) IfNode(ctrl, tst, prob, cnt);// New IfNode's
--- a/src/share/vm/opto/library_call.cpp Fri May 18 15:50:09 2012 +0200 +++ b/src/share/vm/opto/library_call.cpp Mon May 14 09:36:00 2012 -0700 @@ -147,7 +147,8 @@ return generate_method_call(method_id, true, false); } - Node* make_string_method_node(int opcode, Node* str1, Node* cnt1, Node* str2, Node* cnt2); + Node* make_string_method_node(int opcode, Node* str1_start, Node* cnt1, Node* str2_start, Node* cnt2); + Node* make_string_method_node(int opcode, Node* str1, Node* str2); bool inline_string_compareTo(); bool inline_string_indexOf(); Node* string_indexOf(Node* string_object, ciTypeArray* target_array, jint offset, jint cache_i, jint md2_i); @@ -844,48 +845,76 @@ //------------------------------make_string_method_node------------------------ -// Helper method for String intrinsic finctions. -Node* LibraryCallKit::make_string_method_node(int opcode, Node* str1, Node* cnt1, Node* str2, Node* cnt2) { - const int value_offset = java_lang_String::value_offset_in_bytes(); - const int count_offset = java_lang_String::count_offset_in_bytes(); - const int offset_offset = java_lang_String::offset_offset_in_bytes(); - +// Helper method for String intrinsic functions. This version is called +// with str1 and str2 pointing to String object nodes. +// +Node* LibraryCallKit::make_string_method_node(int opcode, Node* str1, Node* str2) { Node* no_ctrl = NULL; - ciInstanceKlass* klass = env()->String_klass(); - const TypeOopPtr* string_type = TypeOopPtr::make_from_klass(klass); - - const TypeAryPtr* value_type = - TypeAryPtr::make(TypePtr::NotNull, - TypeAry::make(TypeInt::CHAR,TypeInt::POS), - ciTypeArrayKlass::make(T_CHAR), true, 0); - - // Get start addr of string and substring - Node* str1_valuea = basic_plus_adr(str1, str1, value_offset); - Node* str1_value = make_load(no_ctrl, str1_valuea, value_type, T_OBJECT, string_type->add_offset(value_offset)); - Node* str1_offseta = basic_plus_adr(str1, str1, offset_offset); - Node* str1_offset = make_load(no_ctrl, str1_offseta, TypeInt::INT, T_INT, string_type->add_offset(offset_offset)); + // Get start addr of string + Node* str1_value = load_String_value(no_ctrl, str1); + Node* str1_offset = load_String_offset(no_ctrl, str1); Node* str1_start = array_element_address(str1_value, str1_offset, T_CHAR); - Node* str2_valuea = basic_plus_adr(str2, str2, value_offset); - Node* str2_value = make_load(no_ctrl, str2_valuea, value_type, T_OBJECT, string_type->add_offset(value_offset)); - Node* str2_offseta = basic_plus_adr(str2, str2, offset_offset); - Node* str2_offset = make_load(no_ctrl, str2_offseta, TypeInt::INT, T_INT, string_type->add_offset(offset_offset)); + // Get length of string 1 + Node* str1_len = load_String_length(no_ctrl, str1); + + Node* str2_value = load_String_value(no_ctrl, str2); + Node* str2_offset = load_String_offset(no_ctrl, str2); Node* str2_start = array_element_address(str2_value, str2_offset, T_CHAR); + Node* str2_len = NULL; + Node* result = NULL; + + switch (opcode) { + case Op_StrIndexOf: + // Get length of string 2 + str2_len = load_String_length(no_ctrl, str2); + + result = new (C, 6) StrIndexOfNode(control(), memory(TypeAryPtr::CHARS), + str1_start, str1_len, str2_start, str2_len); + break; + case Op_StrComp: + // Get length of string 2 + str2_len = load_String_length(no_ctrl, str2); + + result = new (C, 6) StrCompNode(control(), memory(TypeAryPtr::CHARS), + str1_start, str1_len, str2_start, str2_len); + break; + case Op_StrEquals: + result = new (C, 5) StrEqualsNode(control(), memory(TypeAryPtr::CHARS), + str1_start, str2_start, str1_len); + break; + default: + ShouldNotReachHere(); + return NULL; + } + + // All these intrinsics have checks. + C->set_has_split_ifs(true); // Has chance for split-if optimization + + return _gvn.transform(result); +} + +// Helper method for String intrinsic functions. This version is called +// with str1 and str2 pointing to char[] nodes, with cnt1 and cnt2 pointing +// to Int nodes containing the lenghts of str1 and str2. +// +Node* LibraryCallKit::make_string_method_node(int opcode, Node* str1_start, Node* cnt1, Node* str2_start, Node* cnt2) { + Node* result = NULL; switch (opcode) { case Op_StrIndexOf: result = new (C, 6) StrIndexOfNode(control(), memory(TypeAryPtr::CHARS), - str1_start, cnt1, str2_start, cnt2); + str1_start, cnt1, str2_start, cnt2); break; case Op_StrComp: result = new (C, 6) StrCompNode(control(), memory(TypeAryPtr::CHARS), - str1_start, cnt1, str2_start, cnt2); + str1_start, cnt1, str2_start, cnt2); break; case Op_StrEquals: result = new (C, 5) StrEqualsNode(control(), memory(TypeAryPtr::CHARS), - str1_start, str2_start, cnt1); + str1_start, str2_start, cnt1); break; default: ShouldNotReachHere(); @@ -903,10 +932,6 @@ if (!Matcher::has_match_rule(Op_StrComp)) return false; - const int value_offset = java_lang_String::value_offset_in_bytes(); - const int count_offset = java_lang_String::count_offset_in_bytes(); - const int offset_offset = java_lang_String::offset_offset_in_bytes(); - _sp += 2; Node *argument = pop(); // pop non-receiver first: it was pushed second Node *receiver = pop(); @@ -923,18 +948,7 @@ return true; } - ciInstanceKlass* klass = env()->String_klass(); - const TypeOopPtr* string_type = TypeOopPtr::make_from_klass(klass); - Node* no_ctrl = NULL; - - // Get counts for string and argument - Node* receiver_cnta = basic_plus_adr(receiver, receiver, count_offset); - Node* receiver_cnt = make_load(no_ctrl, receiver_cnta, TypeInt::INT, T_INT, string_type->add_offset(count_offset)); - - Node* argument_cnta = basic_plus_adr(argument, argument, count_offset); - Node* argument_cnt = make_load(no_ctrl, argument_cnta, TypeInt::INT, T_INT, string_type->add_offset(count_offset)); - - Node* compare = make_string_method_node(Op_StrComp, receiver, receiver_cnt, argument, argument_cnt); + Node* compare = make_string_method_node(Op_StrComp, receiver, argument); push(compare); return true; } @@ -944,10 +958,6 @@ if (!Matcher::has_match_rule(Op_StrEquals)) return false; - const int value_offset = java_lang_String::value_offset_in_bytes(); - const int count_offset = java_lang_String::count_offset_in_bytes(); - const int offset_offset = java_lang_String::offset_offset_in_bytes(); - int nargs = 2; _sp += nargs; Node* argument = pop(); // pop non-receiver first: it was pushed second @@ -1001,24 +1011,31 @@ } } - const TypeOopPtr* string_type = TypeOopPtr::make_from_klass(klass); - - Node* no_ctrl = NULL; - Node* receiver_cnt; - Node* argument_cnt; - if (!stopped()) { + const TypeOopPtr* string_type = TypeOopPtr::make_from_klass(klass); + // Properly cast the argument to String argument = _gvn.transform(new (C, 2) CheckCastPPNode(control(), argument, string_type)); // This path is taken only when argument's type is String:NotNull. argument = cast_not_null(argument, false); - // Get counts for string and argument - Node* receiver_cnta = basic_plus_adr(receiver, receiver, count_offset); - receiver_cnt = make_load(no_ctrl, receiver_cnta, TypeInt::INT, T_INT, string_type->add_offset(count_offset)); - - Node* argument_cnta = basic_plus_adr(argument, argument, count_offset); - argument_cnt = make_load(no_ctrl, argument_cnta, TypeInt::INT, T_INT, string_type->add_offset(count_offset)); + Node* no_ctrl = NULL; + + // Get start addr of receiver + Node* receiver_val = load_String_value(no_ctrl, receiver); + Node* receiver_offset = load_String_offset(no_ctrl, receiver); + Node* receiver_start = array_element_address(receiver_val, receiver_offset, T_CHAR); + + // Get length of receiver + Node* receiver_cnt = load_String_length(no_ctrl, receiver); + + // Get start addr of argument + Node* argument_val = load_String_value(no_ctrl, argument); + Node* argument_offset = load_String_offset(no_ctrl, argument); + Node* argument_start = array_element_address(argument_val, argument_offset, T_CHAR); + + // Get length of argument + Node* argument_cnt = load_String_length(no_ctrl, argument); // Check for receiver count != argument count Node* cmp = _gvn.transform( new(C, 3) CmpINode(receiver_cnt, argument_cnt) ); @@ -1028,14 +1045,14 @@ phi->init_req(4, intcon(0)); region->init_req(4, if_ne); } - } - - // Check for count == 0 is done by mach node StrEquals. - - if (!stopped()) { - Node* equals = make_string_method_node(Op_StrEquals, receiver, receiver_cnt, argument, argument_cnt); - phi->init_req(1, equals); - region->init_req(1, control()); + + // Check for count == 0 is done by assembler code for StrEquals. + + if (!stopped()) { + Node* equals = make_string_method_node(Op_StrEquals, receiver_start, receiver_cnt, argument_start, argument_cnt); + phi->init_req(1, equals); + region->init_req(1, control()); + } } // post merge @@ -1133,20 +1150,9 @@ const int nargs = 2; // number of arguments to push back for uncommon trap in predicate - const int value_offset = java_lang_String::value_offset_in_bytes(); - const int count_offset = java_lang_String::count_offset_in_bytes(); - const int offset_offset = java_lang_String::offset_offset_in_bytes(); - - ciInstanceKlass* klass = env()->String_klass(); - const TypeOopPtr* string_type = TypeOopPtr::make_from_klass(klass); - const TypeAryPtr* source_type = TypeAryPtr::make(TypePtr::NotNull, TypeAry::make(TypeInt::CHAR,TypeInt::POS), ciTypeArrayKlass::make(T_CHAR), true, 0); - - Node* sourceOffseta = basic_plus_adr(string_object, string_object, offset_offset); - Node* sourceOffset = make_load(no_ctrl, sourceOffseta, TypeInt::INT, T_INT, string_type->add_offset(offset_offset)); - Node* sourceCounta = basic_plus_adr(string_object, string_object, count_offset); - Node* sourceCount = make_load(no_ctrl, sourceCounta, TypeInt::INT, T_INT, string_type->add_offset(count_offset)); - Node* sourcea = basic_plus_adr(string_object, string_object, value_offset); - Node* source = make_load(no_ctrl, sourcea, source_type, T_OBJECT, string_type->add_offset(value_offset)); + Node* source = load_String_value(no_ctrl, string_object); + Node* sourceOffset = load_String_offset(no_ctrl, string_object); + Node* sourceCount = load_String_length(no_ctrl, string_object); Node* target = _gvn.transform( makecon(TypeOopPtr::make_from_constant(target_array, true)) ); jint target_length = target_array->length(); @@ -1214,10 +1220,6 @@ //------------------------------inline_string_indexOf------------------------ bool LibraryCallKit::inline_string_indexOf() { - const int value_offset = java_lang_String::value_offset_in_bytes(); - const int count_offset = java_lang_String::count_offset_in_bytes(); - const int offset_offset = java_lang_String::offset_offset_in_bytes(); - _sp += 2; Node *argument = pop(); // pop non-receiver first: it was pushed second Node *receiver = pop(); @@ -1251,12 +1253,21 @@ Node* result_phi = new (C, 4) PhiNode(result_rgn, TypeInt::INT); Node* no_ctrl = NULL; - // Get counts for string and substr - Node* source_cnta = basic_plus_adr(receiver, receiver, count_offset); - Node* source_cnt = make_load(no_ctrl, source_cnta, TypeInt::INT, T_INT, string_type->add_offset(count_offset)); - - Node* substr_cnta = basic_plus_adr(argument, argument, count_offset); - Node* substr_cnt = make_load(no_ctrl, substr_cnta, TypeInt::INT, T_INT, string_type->add_offset(count_offset)); + // Get start addr of source string + Node* source = load_String_value(no_ctrl, receiver); + Node* source_offset = load_String_offset(no_ctrl, receiver); + Node* source_start = array_element_address(source, source_offset, T_CHAR); + + // Get length of source string + Node* source_cnt = load_String_length(no_ctrl, receiver); + + // Get start addr of substring + Node* substr = load_String_value(no_ctrl, argument); + Node* substr_offset = load_String_offset(no_ctrl, argument); + Node* substr_start = array_element_address(substr, substr_offset, T_CHAR); + + // Get length of source string + Node* substr_cnt = load_String_length(no_ctrl, argument); // Check for substr count > string count Node* cmp = _gvn.transform( new(C, 3) CmpINode(substr_cnt, source_cnt) ); @@ -1279,7 +1290,7 @@ } if (!stopped()) { - result = make_string_method_node(Op_StrIndexOf, receiver, source_cnt, argument, substr_cnt); + result = make_string_method_node(Op_StrIndexOf, source_start, source_cnt, substr_start, substr_cnt); result_phi->init_req(1, result); result_rgn->init_req(1, control()); } @@ -1304,11 +1315,19 @@ ciInstance* str = str_const->as_instance(); assert(str != NULL, "must be instance"); - ciObject* v = str->field_value_by_offset(value_offset).as_object(); - int o = str->field_value_by_offset(offset_offset).as_int(); - int c = str->field_value_by_offset(count_offset).as_int(); + ciObject* v = str->field_value_by_offset(java_lang_String::value_offset_in_bytes()).as_object(); ciTypeArray* pat = v->as_type_array(); // pattern (argument) character array + int o; + int c; + if (java_lang_String::has_offset_field()) { + o = str->field_value_by_offset(java_lang_String::offset_offset_in_bytes()).as_int(); + c = str->field_value_by_offset(java_lang_String::count_offset_in_bytes()).as_int(); + } else { + o = 0; + c = pat->length(); + } + // constant strings have no offset and count == length which // simplifies the resulting code somewhat so lets optimize for that. if (o != 0 || c != pat->length()) {
--- a/src/share/vm/opto/stringopts.cpp Fri May 18 15:50:09 2012 +0200 +++ b/src/share/vm/opto/stringopts.cpp Mon May 14 09:36:00 2012 -0700 @@ -1,5 +1,5 @@ /* - * Copyright (c) 2009, 2011, Oracle and/or its affiliates. All rights reserved. + * Copyright (c) 2009, 2012, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it @@ -528,16 +528,6 @@ } // Collect the types needed to talk about the various slices of memory - const TypeInstPtr* string_type = TypeInstPtr::make(TypePtr::NotNull, C->env()->String_klass(), - false, NULL, 0); - - const TypePtr* value_field_type = string_type->add_offset(java_lang_String::value_offset_in_bytes()); - const TypePtr* offset_field_type = string_type->add_offset(java_lang_String::offset_offset_in_bytes()); - const TypePtr* count_field_type = string_type->add_offset(java_lang_String::count_offset_in_bytes()); - - value_field_idx = C->get_alias_index(value_field_type); - count_field_idx = C->get_alias_index(count_field_type); - offset_field_idx = C->get_alias_index(offset_field_type); char_adr_idx = C->get_alias_index(TypeAryPtr::CHARS); // For each locally allocated StringBuffer see if the usages can be @@ -1173,18 +1163,9 @@ Node* PhaseStringOpts::copy_string(GraphKit& kit, Node* str, Node* char_array, Node* start) { Node* string = str; - Node* offset = kit.make_load(kit.control(), - kit.basic_plus_adr(string, string, java_lang_String::offset_offset_in_bytes()), - TypeInt::INT, T_INT, offset_field_idx); - Node* count = kit.make_load(kit.control(), - kit.basic_plus_adr(string, string, java_lang_String::count_offset_in_bytes()), - TypeInt::INT, T_INT, count_field_idx); - const TypeAryPtr* value_type = TypeAryPtr::make(TypePtr::NotNull, - TypeAry::make(TypeInt::CHAR,TypeInt::POS), - ciTypeArrayKlass::make(T_CHAR), true, 0); - Node* value = kit.make_load(kit.control(), - kit.basic_plus_adr(string, string, java_lang_String::value_offset_in_bytes()), - value_type, T_OBJECT, value_field_idx); + Node* offset = kit.load_String_offset(kit.control(), string); + Node* count = kit.load_String_length(kit.control(), string); + Node* value = kit.load_String_value (kit.control(), string); // copy the contents if (offset->is_Con() && count->is_Con() && value->is_Con() && count->get_int() < unroll_string_copy_length) { @@ -1341,10 +1322,9 @@ arg = phi; sc->set_argument(argi, arg); } - // Node* offset = kit.make_load(NULL, kit.basic_plus_adr(arg, arg, offset_offset), - // TypeInt::INT, T_INT, offset_field_idx); - Node* count = kit.make_load(kit.control(), kit.basic_plus_adr(arg, arg, java_lang_String::count_offset_in_bytes()), - TypeInt::INT, T_INT, count_field_idx); + + Node* count = kit.load_String_length(kit.control(), arg); + length = __ AddI(length, count); string_sizes->init_req(argi, NULL); break; @@ -1435,12 +1415,11 @@ } // Intialize the string - kit.store_to_memory(kit.control(), kit.basic_plus_adr(result, java_lang_String::offset_offset_in_bytes()), - __ intcon(0), T_INT, offset_field_idx); - kit.store_to_memory(kit.control(), kit.basic_plus_adr(result, java_lang_String::count_offset_in_bytes()), - length, T_INT, count_field_idx); - kit.store_to_memory(kit.control(), kit.basic_plus_adr(result, java_lang_String::value_offset_in_bytes()), - char_array, T_OBJECT, value_field_idx); + if (java_lang_String::has_offset_field()) { + kit.store_String_offset(kit.control(), result, __ intcon(0)); + kit.store_String_length(kit.control(), result, length); + } + kit.store_String_value(kit.control(), result, char_array); // hook up the outgoing control and result kit.replace_call(sc->end(), result);
--- a/src/share/vm/opto/stringopts.hpp Fri May 18 15:50:09 2012 +0200 +++ b/src/share/vm/opto/stringopts.hpp Mon May 14 09:36:00 2012 -0700 @@ -1,5 +1,5 @@ /* - * Copyright (c) 2009, 2010, Oracle and/or its affiliates. All rights reserved. + * Copyright (c) 2009, 2012, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it @@ -41,9 +41,6 @@ // Memory slices needed for code gen int char_adr_idx; - int value_field_idx; - int count_field_idx; - int offset_field_idx; // Integer.sizeTable - used for int to String conversion ciField* size_table_field;