Mercurial > jdk8-mips64-public > hotspot / annotate
src/share/vm/ci/ciArray.cpp@b2ee5dc63353 (annotated)
src/share/vm/ci/ciArray.cpp
Wed, 23 Oct 2013 12:40:23 +0200
- author
- roland
- date
- Wed, 23 Oct 2013 12:40:23 +0200
- changeset 5991
- b2ee5dc63353
- parent 5658
- edb5ab0f3fe5
- child 6198
- 55fb97c4c58d
- permissions
- -rw-r--r--
8024070: C2 needs some form of type speculation
Summary: record unused type profile information with type system, propagate and use it.
Reviewed-by: kvn, twisti
| duke@435 | 1 | /* |
| stefank@2314 | 2 | * Copyright (c) 1999, 2010, Oracle and/or its affiliates. All rights reserved. |
| duke@435 | 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| duke@435 | 4 | * |
| duke@435 | 5 | * This code is free software; you can redistribute it and/or modify it |
| duke@435 | 6 | * under the terms of the GNU General Public License version 2 only, as |
| duke@435 | 7 | * published by the Free Software Foundation. |
| duke@435 | 8 | * |
| duke@435 | 9 | * This code is distributed in the hope that it will be useful, but WITHOUT |
| duke@435 | 10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| duke@435 | 11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| duke@435 | 12 | * version 2 for more details (a copy is included in the LICENSE file that |
| duke@435 | 13 | * accompanied this code). |
| duke@435 | 14 | * |
| duke@435 | 15 | * You should have received a copy of the GNU General Public License version |
| duke@435 | 16 | * 2 along with this work; if not, write to the Free Software Foundation, |
| duke@435 | 17 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| duke@435 | 18 | * |
| trims@1907 | 19 | * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| trims@1907 | 20 | * or visit www.oracle.com if you need additional information or have any |
| trims@1907 | 21 | * questions. |
| duke@435 | 22 | * |
| duke@435 | 23 | */ |
| duke@435 | 24 | |
| stefank@2314 | 25 | #include "precompiled.hpp" |
| stefank@2314 | 26 | #include "ci/ciArray.hpp" |
| vlivanov@5658 | 27 | #include "ci/ciArrayKlass.hpp" |
| vlivanov@5658 | 28 | #include "ci/ciConstant.hpp" |
| stefank@2314 | 29 | #include "ci/ciKlass.hpp" |
| stefank@2314 | 30 | #include "ci/ciUtilities.hpp" |
| vlivanov@5658 | 31 | #include "oops/objArrayOop.hpp" |
| vlivanov@5658 | 32 | #include "oops/typeArrayOop.hpp" |
| duke@435 | 33 | |
| duke@435 | 34 | // ciArray |
| duke@435 | 35 | // |
| duke@435 | 36 | // This class represents an arrayOop in the HotSpot virtual |
| duke@435 | 37 | // machine. |
| vlivanov@5658 | 38 | static BasicType fixup_element_type(BasicType bt) { |
| vlivanov@5658 | 39 | if (bt == T_ARRAY) return T_OBJECT; |
| vlivanov@5658 | 40 | if (bt == T_BOOLEAN) return T_BYTE; |
| vlivanov@5658 | 41 | return bt; |
| vlivanov@5658 | 42 | } |
| vlivanov@5658 | 43 | |
| vlivanov@5658 | 44 | ciConstant ciArray::element_value_impl(BasicType elembt, |
| vlivanov@5658 | 45 | arrayOop ary, |
| vlivanov@5658 | 46 | int index) { |
| vlivanov@5658 | 47 | if (ary == NULL) |
| vlivanov@5658 | 48 | return ciConstant(); |
| vlivanov@5658 | 49 | assert(ary->is_array(), ""); |
| vlivanov@5658 | 50 | if (index < 0 || index >= ary->length()) |
| vlivanov@5658 | 51 | return ciConstant(); |
| vlivanov@5658 | 52 | ArrayKlass* ak = (ArrayKlass*) ary->klass(); |
| vlivanov@5658 | 53 | BasicType abt = ak->element_type(); |
| vlivanov@5658 | 54 | if (fixup_element_type(elembt) != |
| vlivanov@5658 | 55 | fixup_element_type(abt)) |
| vlivanov@5658 | 56 | return ciConstant(); |
| vlivanov@5658 | 57 | switch (elembt) { |
| vlivanov@5658 | 58 | case T_ARRAY: |
| vlivanov@5658 | 59 | case T_OBJECT: |
| vlivanov@5658 | 60 | { |
| vlivanov@5658 | 61 | assert(ary->is_objArray(), ""); |
| vlivanov@5658 | 62 | objArrayOop objary = (objArrayOop) ary; |
| vlivanov@5658 | 63 | oop elem = objary->obj_at(index); |
| vlivanov@5658 | 64 | ciEnv* env = CURRENT_ENV; |
| vlivanov@5658 | 65 | ciObject* box = env->get_object(elem); |
| vlivanov@5658 | 66 | return ciConstant(T_OBJECT, box); |
| vlivanov@5658 | 67 | } |
| vlivanov@5658 | 68 | } |
| vlivanov@5658 | 69 | assert(ary->is_typeArray(), ""); |
| vlivanov@5658 | 70 | typeArrayOop tary = (typeArrayOop) ary; |
| vlivanov@5658 | 71 | jint value = 0; |
| vlivanov@5658 | 72 | switch (elembt) { |
| vlivanov@5658 | 73 | case T_LONG: return ciConstant(tary->long_at(index)); |
| vlivanov@5658 | 74 | case T_FLOAT: return ciConstant(tary->float_at(index)); |
| vlivanov@5658 | 75 | case T_DOUBLE: return ciConstant(tary->double_at(index)); |
| vlivanov@5658 | 76 | default: return ciConstant(); |
| vlivanov@5658 | 77 | case T_BYTE: value = tary->byte_at(index); break; |
| vlivanov@5658 | 78 | case T_BOOLEAN: value = tary->byte_at(index) & 1; break; |
| vlivanov@5658 | 79 | case T_SHORT: value = tary->short_at(index); break; |
| vlivanov@5658 | 80 | case T_CHAR: value = tary->char_at(index); break; |
| vlivanov@5658 | 81 | case T_INT: value = tary->int_at(index); break; |
| vlivanov@5658 | 82 | } |
| vlivanov@5658 | 83 | return ciConstant(elembt, value); |
| vlivanov@5658 | 84 | } |
| vlivanov@5658 | 85 | |
| vlivanov@5658 | 86 | // ------------------------------------------------------------------ |
| vlivanov@5658 | 87 | // ciArray::element_value |
| vlivanov@5658 | 88 | // |
| vlivanov@5658 | 89 | // Current value of an element. |
| vlivanov@5658 | 90 | // Returns T_ILLEGAL if there is no element at the given index. |
| vlivanov@5658 | 91 | ciConstant ciArray::element_value(int index) { |
| vlivanov@5658 | 92 | BasicType elembt = element_basic_type(); |
| vlivanov@5658 | 93 | GUARDED_VM_ENTRY( |
| vlivanov@5658 | 94 | return element_value_impl(elembt, get_arrayOop(), index); |
| vlivanov@5658 | 95 | ) |
| vlivanov@5658 | 96 | } |
| vlivanov@5658 | 97 | |
| vlivanov@5658 | 98 | // ------------------------------------------------------------------ |
| vlivanov@5658 | 99 | // ciArray::element_value_by_offset |
| vlivanov@5658 | 100 | // |
| vlivanov@5658 | 101 | // Current value of an element at the specified offset. |
| vlivanov@5658 | 102 | // Returns T_ILLEGAL if there is no element at the given offset. |
| vlivanov@5658 | 103 | ciConstant ciArray::element_value_by_offset(intptr_t element_offset) { |
| vlivanov@5658 | 104 | BasicType elembt = element_basic_type(); |
| vlivanov@5658 | 105 | intptr_t shift = exact_log2(type2aelembytes(elembt)); |
| vlivanov@5658 | 106 | intptr_t header = arrayOopDesc::base_offset_in_bytes(elembt); |
| vlivanov@5658 | 107 | intptr_t index = (element_offset - header) >> shift; |
| vlivanov@5658 | 108 | intptr_t offset = header + ((intptr_t)index << shift); |
| vlivanov@5658 | 109 | if (offset != element_offset || index != (jint)index) |
| vlivanov@5658 | 110 | return ciConstant(); |
| vlivanov@5658 | 111 | return element_value((jint) index); |
| vlivanov@5658 | 112 | } |
| duke@435 | 113 | |
| duke@435 | 114 | // ------------------------------------------------------------------ |
| duke@435 | 115 | // ciArray::print_impl |
| duke@435 | 116 | // |
| duke@435 | 117 | // Implementation of the print method. |
| duke@435 | 118 | void ciArray::print_impl(outputStream* st) { |
| duke@435 | 119 | st->print(" length=%d type=", length()); |
| duke@435 | 120 | klass()->print(st); |
| duke@435 | 121 | } |
