karlklose@chromium.org | 44bc708 | 2011-04-11 12:33:05 +0000 | [diff] [blame] | 1 | // Copyright 2011 the V8 project authors. All rights reserved. |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2 | // Redistribution and use in source and binary forms, with or without |
| 3 | // modification, are permitted provided that the following conditions are |
| 4 | // met: |
| 5 | // |
| 6 | // * Redistributions of source code must retain the above copyright |
| 7 | // notice, this list of conditions and the following disclaimer. |
| 8 | // * Redistributions in binary form must reproduce the above |
| 9 | // copyright notice, this list of conditions and the following |
| 10 | // disclaimer in the documentation and/or other materials provided |
| 11 | // with the distribution. |
| 12 | // * Neither the name of Google Inc. nor the names of its |
| 13 | // contributors may be used to endorse or promote products derived |
| 14 | // from this software without specific prior written permission. |
| 15 | // |
| 16 | // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| 17 | // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| 18 | // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| 19 | // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| 20 | // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| 21 | // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| 22 | // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| 23 | // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| 24 | // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 25 | // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| 26 | // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 27 | |
| 28 | #include "v8.h" |
| 29 | |
| 30 | #include "ast.h" |
| 31 | #include "scopes.h" |
| 32 | #include "variables.h" |
| 33 | |
kasperl@chromium.org | 71affb5 | 2009-05-26 05:44:31 +0000 | [diff] [blame] | 34 | namespace v8 { |
| 35 | namespace internal { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 36 | |
| 37 | // ---------------------------------------------------------------------------- |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 38 | // Implementation Variable. |
| 39 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 40 | const char* Variable::Mode2String(Mode mode) { |
| 41 | switch (mode) { |
| 42 | case VAR: return "VAR"; |
| 43 | case CONST: return "CONST"; |
| 44 | case DYNAMIC: return "DYNAMIC"; |
ager@chromium.org | 381abbb | 2009-02-25 13:23:22 +0000 | [diff] [blame] | 45 | case DYNAMIC_GLOBAL: return "DYNAMIC_GLOBAL"; |
| 46 | case DYNAMIC_LOCAL: return "DYNAMIC_LOCAL"; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 47 | case INTERNAL: return "INTERNAL"; |
| 48 | case TEMPORARY: return "TEMPORARY"; |
| 49 | } |
| 50 | UNREACHABLE(); |
| 51 | return NULL; |
| 52 | } |
| 53 | |
| 54 | |
whesse@chromium.org | 4a1fe7d | 2010-09-27 12:32:04 +0000 | [diff] [blame] | 55 | Property* Variable::AsProperty() const { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 56 | return rewrite_ == NULL ? NULL : rewrite_->AsProperty(); |
| 57 | } |
| 58 | |
| 59 | |
whesse@chromium.org | 4a1fe7d | 2010-09-27 12:32:04 +0000 | [diff] [blame] | 60 | Slot* Variable::AsSlot() const { |
| 61 | return rewrite_ == NULL ? NULL : rewrite_->AsSlot(); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 62 | } |
| 63 | |
| 64 | |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 65 | bool Variable::IsStackAllocated() const { |
whesse@chromium.org | 4a1fe7d | 2010-09-27 12:32:04 +0000 | [diff] [blame] | 66 | Slot* slot = AsSlot(); |
| 67 | return slot != NULL && slot->IsStackAllocated(); |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 68 | } |
| 69 | |
| 70 | |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 71 | bool Variable::IsParameter() const { |
| 72 | Slot* s = AsSlot(); |
| 73 | return s != NULL && s->type() == Slot::PARAMETER; |
| 74 | } |
| 75 | |
| 76 | |
| 77 | bool Variable::IsStackLocal() const { |
| 78 | Slot* s = AsSlot(); |
| 79 | return s != NULL && s->type() == Slot::LOCAL; |
| 80 | } |
| 81 | |
| 82 | |
sgjesse@chromium.org | c6c5718 | 2011-01-17 12:24:25 +0000 | [diff] [blame] | 83 | bool Variable::IsContextSlot() const { |
| 84 | Slot* s = AsSlot(); |
| 85 | return s != NULL && s->type() == Slot::CONTEXT; |
| 86 | } |
| 87 | |
| 88 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 89 | Variable::Variable(Scope* scope, |
| 90 | Handle<String> name, |
| 91 | Mode mode, |
| 92 | bool is_valid_LHS, |
ager@chromium.org | 3e87580 | 2009-06-29 08:26:34 +0000 | [diff] [blame] | 93 | Kind kind) |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 94 | : scope_(scope), |
| 95 | name_(name), |
| 96 | mode_(mode), |
ager@chromium.org | 3e87580 | 2009-06-29 08:26:34 +0000 | [diff] [blame] | 97 | kind_(kind), |
ager@chromium.org | 381abbb | 2009-02-25 13:23:22 +0000 | [diff] [blame] | 98 | local_if_not_shadowed_(NULL), |
ager@chromium.org | 378b34e | 2011-01-28 08:04:38 +0000 | [diff] [blame] | 99 | rewrite_(NULL), |
| 100 | is_valid_LHS_(is_valid_LHS), |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 101 | is_accessed_from_inner_scope_(false), |
ager@chromium.org | 378b34e | 2011-01-28 08:04:38 +0000 | [diff] [blame] | 102 | is_used_(false) { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 103 | // names must be canonicalized for fast equality checks |
| 104 | ASSERT(name->IsSymbol()); |
| 105 | } |
| 106 | |
| 107 | |
| 108 | bool Variable::is_global() const { |
| 109 | // Temporaries are never global, they must always be allocated in the |
| 110 | // activation frame. |
| 111 | return mode_ != TEMPORARY && scope_ != NULL && scope_->is_global_scope(); |
| 112 | } |
| 113 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 114 | } } // namespace v8::internal |