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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
*
* Copyright 2015 Mozilla Foundation
* Copyright 2023 Moonchild Productions
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef wasm_ion_compile_h
#define wasm_ion_compile_h
#include "jit/MacroAssembler.h"
#include "wasm/WasmTypes.h"
namespace js {
namespace wasm {
struct ModuleGeneratorData;
typedef Vector<jit::MIRType, 8, SystemAllocPolicy> MIRTypeVector;
typedef jit::ABIArgIter<MIRTypeVector> ABIArgMIRTypeIter;
typedef jit::ABIArgIter<ValTypeVector> ABIArgValTypeIter;
// The FuncBytes class represents a single, concurrently-compilable function.
// A FuncBytes object is composed of the wasm function body bytes along with the
// ambient metadata describing the function necessary to compile it.
class FuncBytes
{
Bytes bytes_;
uint32_t index_;
const SigWithId& sig_;
uint32_t lineOrBytecode_;
Uint32Vector callSiteLineNums_;
public:
FuncBytes(Bytes&& bytes,
uint32_t index,
const SigWithId& sig,
uint32_t lineOrBytecode,
Uint32Vector&& callSiteLineNums)
: bytes_(Move(bytes)),
index_(index),
sig_(sig),
lineOrBytecode_(lineOrBytecode),
callSiteLineNums_(Move(callSiteLineNums))
{}
Bytes& bytes() { return bytes_; }
const Bytes& bytes() const { return bytes_; }
uint32_t index() const { return index_; }
const SigWithId& sig() const { return sig_; }
uint32_t lineOrBytecode() const { return lineOrBytecode_; }
const Uint32Vector& callSiteLineNums() const { return callSiteLineNums_; }
};
typedef UniquePtr<FuncBytes> UniqueFuncBytes;
// The FuncCompileResults class contains the results of compiling a single
// function body, ready to be merged into the whole-module MacroAssembler.
class FuncCompileResults
{
jit::TempAllocator alloc_;
jit::MacroAssembler masm_;
FuncOffsets offsets_;
FuncCompileResults(const FuncCompileResults&) = delete;
FuncCompileResults& operator=(const FuncCompileResults&) = delete;
public:
explicit FuncCompileResults(LifoAlloc& lifo)
: alloc_(&lifo),
masm_(jit::MacroAssembler::WasmToken(), alloc_)
{}
jit::TempAllocator& alloc() { return alloc_; }
jit::MacroAssembler& masm() { return masm_; }
FuncOffsets& offsets() { return offsets_; }
};
// An IonCompileTask represents the task of compiling a single function body. An
// IonCompileTask is filled with the wasm code to be compiled on the main
// validation thread, sent off to an Ion compilation helper thread which creates
// the FuncCompileResults, and finally sent back to the validation thread. To
// save time allocating and freeing memory, IonCompileTasks are reset() and
// reused.
class IonCompileTask
{
public:
enum class CompileMode { None, Baseline, Ion };
private:
const ModuleGeneratorData& mg_;
LifoAlloc lifo_;
UniqueFuncBytes func_;
CompileMode mode_;
Maybe<FuncCompileResults> results_;
IonCompileTask(const IonCompileTask&) = delete;
IonCompileTask& operator=(const IonCompileTask&) = delete;
public:
IonCompileTask(const ModuleGeneratorData& mg, size_t defaultChunkSize)
: mg_(mg), lifo_(defaultChunkSize), func_(nullptr), mode_(CompileMode::None)
{}
LifoAlloc& lifo() {
return lifo_;
}
const ModuleGeneratorData& mg() const {
return mg_;
}
void init(UniqueFuncBytes func, CompileMode mode) {
MOZ_ASSERT(!func_);
func_ = Move(func);
results_.emplace(lifo_);
mode_ = mode;
}
CompileMode mode() const {
return mode_;
}
const FuncBytes& func() const {
MOZ_ASSERT(func_);
return *func_;
}
FuncCompileResults& results() {
return *results_;
}
void reset(Bytes* recycled) {
if (func_)
*recycled = Move(func_->bytes());
func_.reset(nullptr);
results_.reset();
lifo_.releaseAll();
mode_ = CompileMode::None;
}
};
[[nodiscard]] bool
IonCompileFunction(IonCompileTask* task);
bool
CompileFunction(IonCompileTask* task);
} // namespace wasm
} // namespace js
#endif // wasm_ion_compile_h
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