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// Copyright 2009 the V8 project authors. All rights reserved.
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following
// disclaimer in the documentation and/or other materials provided
// with the distribution.
// * Neither the name of Google Inc. nor the names of its
// contributors may be used to endorse or promote products derived
// from this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#include "v8.h"
#include "codegen-inl.h"
#include "jump-target-inl.h"
#include "register-allocator-inl.h"
namespace v8 {
namespace internal {
// -------------------------------------------------------------------------
// JumpTarget implementation.
void JumpTarget::Jump() {
DoJump();
}
void JumpTarget::Branch(Condition cc, Hint hint) {
DoBranch(cc, hint);
}
void JumpTarget::Bind() {
DoBind();
}
// -------------------------------------------------------------------------
// ShadowTarget implementation.
ShadowTarget::ShadowTarget(BreakTarget* shadowed) {
ASSERT(shadowed != NULL);
other_target_ = shadowed;
#ifdef DEBUG
is_shadowing_ = true;
#endif
// While shadowing this shadow target saves the state of the original.
shadowed->CopyTo(this);
// The original's state is reset.
shadowed->Unuse();
ASSERT(cgen()->has_valid_frame());
shadowed->set_expected_height(cgen()->frame()->height());
}
void ShadowTarget::StopShadowing() {
ASSERT(is_shadowing_);
// The states of this target, which was shadowed, and the original
// target, which was shadowing, are swapped.
BreakTarget temp;
other_target_->CopyTo(&temp);
CopyTo(other_target_);
temp.CopyTo(this);
temp.Unuse();
#ifdef DEBUG
is_shadowing_ = false;
#endif
}
} } // namespace v8::internal
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