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09a8440b45
PR-URL: https://github.com/nodejs/node/pull/51362 Reviewed-By: Matteo Collina <matteo.collina@gmail.com> Reviewed-By: Antoine du Hamel <duhamelantoine1995@gmail.com> Reviewed-By: Rafael Gonzaga <rafael.nunu@hotmail.com>
88 lines
2.6 KiB
JavaScript
88 lines
2.6 KiB
JavaScript
// Copyright 2023 the V8 project authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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// Flags: --allow-natives-syntax --turbofan
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// Flags: --no-always-turbofan --no-always-sparkplug --expose-gc
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d8.file.execute("test/mjsunit/wasm/wasm-module-builder.js");
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function testOptimized(run, fctToOptimize) {
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fctToOptimize = fctToOptimize ?? run;
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%PrepareFunctionForOptimization(fctToOptimize);
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for (let i = 0; i < 10; ++i) {
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run();
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}
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%OptimizeFunctionOnNextCall(fctToOptimize);
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run();
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assertOptimized(fctToOptimize);
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}
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/**
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* Test load elimination using "user-space" arrays.
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* Assumption: A user-space array is implemented as a struct containing a wasm
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* array used as a backing store.
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* Assumption 2: For simplicity, there isn't any bounds check happening on the
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* size stored in the wasm struct.
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*/
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(function TestUserSpaceArrayLoadElimination() {
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print(arguments.callee.name);
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let builder = new WasmModuleBuilder();
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let backingStore = builder.addArray(kWasmI8, true);
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let arrayStruct = builder.addStruct([
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makeField(kWasmI32 /*length*/, true),
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makeField(wasmRefType(backingStore), true)
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]);
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builder.addFunction('createArray',
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makeSig([kWasmI32, kWasmI32, kWasmI32], [kWasmExternRef]))
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.addBody([
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kExprI32Const, 3, // length
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kExprLocalGet, 0,
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kExprLocalGet, 1,
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kExprLocalGet, 2,
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kGCPrefix, kExprArrayNewFixed, backingStore, 3,
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kGCPrefix, kExprStructNew, arrayStruct,
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kGCPrefix, kExprExternConvertAny,
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])
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.exportFunc();
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builder.addFunction('getLength',
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makeSig([kWasmExternRef], [kWasmI32]))
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.addBody([
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kExprLocalGet, 0,
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kGCPrefix, kExprAnyConvertExtern,
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kGCPrefix, kExprRefCast, arrayStruct,
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kGCPrefix, kExprStructGet, arrayStruct, 0,
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])
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.exportFunc();
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builder.addFunction('get', makeSig([kWasmExternRef, kWasmI32], [kWasmI32]))
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.addBody([
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kExprLocalGet, 0,
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kGCPrefix, kExprAnyConvertExtern,
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kGCPrefix, kExprRefCast, arrayStruct,
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kGCPrefix, kExprStructGet, arrayStruct, 1,
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kExprLocalGet, 1,
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kGCPrefix, kExprArrayGetU, backingStore,
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])
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.exportFunc();
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let instance = builder.instantiate({});
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let wasm = instance.exports;
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let myUserArray = wasm.createArray(42, 43, 44);
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let sumArray = (arrayStruct) => {
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let get = wasm.get;
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let length = wasm.getLength(arrayStruct);
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let result = 0;
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for (let i = 0; i < length; ++i) {
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result += get(arrayStruct, i);
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}
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return result;
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};
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testOptimized(() => assertEquals(42+43+44, sumArray(myUserArray)), sumArray);
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})();
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