Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1 | // Copyright 2009 the V8 project authors. All rights reserved. |
| 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 "codegen-inl.h" |
| 31 | #include "jump-target-inl.h" |
| 32 | #include "register-allocator-inl.h" |
| 33 | |
| 34 | namespace v8 { |
| 35 | namespace internal { |
| 36 | |
| 37 | // ------------------------------------------------------------------------- |
| 38 | // JumpTarget implementation. |
| 39 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 40 | void JumpTarget::Jump() { |
| 41 | DoJump(); |
| 42 | } |
| 43 | |
| 44 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 45 | void JumpTarget::Branch(Condition cc, Hint hint) { |
| 46 | DoBranch(cc, hint); |
| 47 | } |
| 48 | |
| 49 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 50 | void JumpTarget::Bind() { |
| 51 | DoBind(); |
| 52 | } |
| 53 | |
| 54 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 55 | // ------------------------------------------------------------------------- |
| 56 | // ShadowTarget implementation. |
| 57 | |
| 58 | ShadowTarget::ShadowTarget(BreakTarget* shadowed) { |
| 59 | ASSERT(shadowed != NULL); |
| 60 | other_target_ = shadowed; |
| 61 | |
| 62 | #ifdef DEBUG |
| 63 | is_shadowing_ = true; |
| 64 | #endif |
| 65 | // While shadowing this shadow target saves the state of the original. |
| 66 | shadowed->CopyTo(this); |
| 67 | |
| 68 | // The original's state is reset. |
| 69 | shadowed->Unuse(); |
| 70 | ASSERT(cgen()->has_valid_frame()); |
| 71 | shadowed->set_expected_height(cgen()->frame()->height()); |
| 72 | } |
| 73 | |
| 74 | |
| 75 | void ShadowTarget::StopShadowing() { |
| 76 | ASSERT(is_shadowing_); |
| 77 | |
| 78 | // The states of this target, which was shadowed, and the original |
| 79 | // target, which was shadowing, are swapped. |
| 80 | BreakTarget temp; |
| 81 | other_target_->CopyTo(&temp); |
| 82 | CopyTo(other_target_); |
| 83 | temp.CopyTo(this); |
| 84 | temp.Unuse(); |
| 85 | |
| 86 | #ifdef DEBUG |
| 87 | is_shadowing_ = false; |
| 88 | #endif |
| 89 | } |
| 90 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 91 | } } // namespace v8::internal |