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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 "register-allocator-inl.h"
#include "virtual-frame-inl.h"
namespace v8 {
namespace internal {
// -------------------------------------------------------------------------
// VirtualFrame implementation.
// If there are any registers referenced only by the frame, spill one.
Register VirtualFrame::SpillAnyRegister() {
// Find the leftmost (ordered by register number) register whose only
// reference is in the frame.
for (int i = 0; i < RegisterAllocator::kNumRegisters; i++) {
if (is_used(i) && cgen()->allocator()->count(i) == 1) {
SpillElementAt(register_location(i));
ASSERT(!cgen()->allocator()->is_used(i));
return RegisterAllocator::ToRegister(i);
}
}
return no_reg;
}
// Specialization of List::ResizeAdd to non-inlined version for FrameElements.
// The function ResizeAdd becomes a real function, whose implementation is the
// inlined ResizeAddInternal.
template <>
void List<FrameElement,
FreeStoreAllocationPolicy>::ResizeAdd(const FrameElement& element) {
ResizeAddInternal(element);
}
} } // namespace v8::internal
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