fa7c92eaf5
of having a list of virtual frame pointers in the jump target we have one virtual frame, which is the frame that all have to merge to to branch to that frame. The virtual frame in the JumpTarget is inside the JumpTarget, rather than being an allocated object that is pointed to. Unfortunately this means that the JumpTarget class has to be able to see the size of a VirtualFrame object to compile, which in turn lead to a major reorganization of related .h files. The actual change of functionality in this change is intended to be minimal (we now assert that the virtual frames match when using JumpTarget instead of just assuming that they do). Review URL: http://codereview.chromium.org/1961004 git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@4631 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
92 lines
2.8 KiB
C++
92 lines
2.8 KiB
C++
// Copyright 2009 the V8 project authors. All rights reserved.
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are
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// met:
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//
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// * Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above
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// copyright notice, this list of conditions and the following
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// disclaimer in the documentation and/or other materials provided
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// with the distribution.
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// * Neither the name of Google Inc. nor the names of its
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// contributors may be used to endorse or promote products derived
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// from this software without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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#include "v8.h"
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#include "codegen-inl.h"
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#include "jump-target-inl.h"
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#include "register-allocator-inl.h"
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namespace v8 {
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namespace internal {
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// -------------------------------------------------------------------------
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// JumpTarget implementation.
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void JumpTarget::Jump() {
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DoJump();
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}
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void JumpTarget::Branch(Condition cc, Hint hint) {
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DoBranch(cc, hint);
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}
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void JumpTarget::Bind() {
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DoBind();
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}
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// -------------------------------------------------------------------------
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// ShadowTarget implementation.
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ShadowTarget::ShadowTarget(BreakTarget* shadowed) {
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ASSERT(shadowed != NULL);
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other_target_ = shadowed;
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#ifdef DEBUG
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is_shadowing_ = true;
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#endif
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// While shadowing this shadow target saves the state of the original.
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shadowed->CopyTo(this);
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// The original's state is reset.
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shadowed->Unuse();
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ASSERT(cgen()->has_valid_frame());
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shadowed->set_expected_height(cgen()->frame()->height());
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}
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void ShadowTarget::StopShadowing() {
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ASSERT(is_shadowing_);
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// The states of this target, which was shadowed, and the original
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// target, which was shadowing, are swapped.
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BreakTarget temp;
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other_target_->CopyTo(&temp);
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CopyTo(other_target_);
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temp.CopyTo(this);
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temp.Unuse();
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#ifdef DEBUG
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is_shadowing_ = false;
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#endif
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}
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} } // namespace v8::internal
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