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9d7cd9b864
PR-URL: https://github.com/nodejs/node/pull/54077 Reviewed-By: Jiawen Geng <technicalcute@gmail.com> Reviewed-By: Richard Lau <rlau@redhat.com> Reviewed-By: Joyee Cheung <joyeec9h3@gmail.com> Reviewed-By: Marco Ippolito <marcoippolito54@gmail.com>
79 lines
2.3 KiB
JavaScript
79 lines
2.3 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: --experimental-wasm-stringref
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d8.file.execute("test/mjsunit/wasm/wasm-module-builder.js");
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let kSig_v_w = makeSig([kWasmStringRef], []);
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let kSig_iw_i = makeSig([kWasmI32], [kWasmI32, kWasmStringRef]);
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(function TestStringViewIterStack() {
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let builder = new WasmModuleBuilder();
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let wrapper = builder.addStruct([makeField(kWasmStringViewIter, true)]);
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let global = builder.addGlobal(wasmRefNullType(wrapper), true, false);
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builder.addFunction("iterate", kSig_v_w)
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.exportFunc()
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.addBody([
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kExprLocalGet, 0,
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...GCInstr(kExprStringAsIter),
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kGCPrefix, kExprStructNew, wrapper,
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kExprGlobalSet, global.index
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]);
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// The following functions perform a stringview operation and have the
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// value 42 on the stack to ensure that the value stack is preserved on each
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// of these operations.
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builder.addFunction("advance", kSig_ii_i)
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.exportFunc()
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.addBody([
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kExprI32Const, 42,
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kExprGlobalGet, global.index,
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kGCPrefix, kExprStructGet, wrapper, 0,
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kExprLocalGet, 0,
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...GCInstr(kExprStringViewIterAdvance)
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]);
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builder.addFunction("rewind", kSig_ii_i)
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.exportFunc()
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.addBody([
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kExprI32Const, 42,
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kExprGlobalGet, global.index,
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kGCPrefix, kExprStructGet, wrapper, 0,
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kExprLocalGet, 0,
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...GCInstr(kExprStringViewIterRewind)
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]);
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builder.addFunction("slice", kSig_iw_i)
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.exportFunc()
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.addBody([
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kExprI32Const, 42,
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kExprGlobalGet, global.index,
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kGCPrefix, kExprStructGet, wrapper, 0,
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kExprLocalGet, 0,
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...GCInstr(kExprStringViewIterSlice)
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]);
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let instance = builder.instantiate();
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let str = 'ascii string';
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instance.exports.iterate(str);
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for (let i = 0; i < str.length; i++) {
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assertEquals([42, 1], instance.exports.advance(1));
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}
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assertEquals([42, 0], instance.exports.advance(1));
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for (let i = 0; i < str.length; i++) {
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assertEquals([42, 1], instance.exports.rewind(1));
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}
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assertEquals([42, 0], instance.exports.rewind(1));
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for (let i = 0; i < str.length; i++) {
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assertEquals([42, str.substring(0, i)], instance.exports.slice(i));
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}
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})();
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