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/*
* Copyright (C) 2016 Apple Inc. All rights reserved.
* Copyright (C) 2017 Yusuke Suzuki <utatane.tea@gmail.com>.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. 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.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``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 APPLE INC. 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.
*/
#pragma once
#if ENABLE(JIT)
#include "CCallHelpers.h"
namespace JSC {
class SnippetParams;
typedef CCallHelpers::JumpList SnippetCompilerFunction(CCallHelpers&, SnippetParams&);
typedef SharedTask<SnippetCompilerFunction> SnippetCompiler;
// Snippet is the way to inject an opaque code generator into DFG and FTL.
// While B3::Patchpoint is self-contained about its compilation information,
// Snippet depends on which DFG Node invokes. For example, CheckDOM will
// link returned failureCases to BadType OSRExit, but this information is offered
// from CheckDOM DFG Node, not from this snippet. This snippet mainly focuses
// on injecting a snippet generator that can tell register usage and can be used
// in both DFG and FTL.
class Snippet : public ThreadSafeRefCounted<Snippet> {
public:
static Ref<Snippet> create()
{
return adoptRef(*new Snippet());
}
template<typename Functor>
void setGenerator(const Functor& functor)
{
m_generator = createSharedTask<SnippetCompilerFunction>(functor);
}
RefPtr<SnippetCompiler> generator() const { return m_generator; }
uint8_t numGPScratchRegisters { 0 };
uint8_t numFPScratchRegisters { 0 };
protected:
Snippet() = default;
private:
RefPtr<SnippetCompiler> m_generator;
};
}
#endif
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