a358c2eb42
Changes: - Add --wasm-loop-unrolling flag. Everything in this CL happens behind this flag. - In decoding, DoReturn does not take returned values as an argument. It is now the responsibility of graph-builder-interface.cc to extract these values. Note that this is what was already happening in Liftoff. - In pipeline.cc, add phase to remove loop exits after generating the turbofan graph. - Explicitly disallow calling FallThruTo() on loops. - Add loop assignments and loop header node to Control type in graph-builder-interface.cc. Assign them in Loop(). - Main change: Add loop exit nodes to wasm-generated graphs. For details, consult this design doc: https://docs.google.com/document/d/1AsUCqslMUB6fLdnGq0ZoPk2kn50jIJAWAL77lKXXP5g - Inline PrepareForLoop(). Bug: v8:11298 Change-Id: I65058f1b5df3f862f4a62f4dcb0bd7e1f1dcf4ee Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2621082 Commit-Queue: Manos Koukoutos <manoskouk@chromium.org> Reviewed-by: Jakob Kummerow <jkummerow@chromium.org> Reviewed-by: Georg Neis <neis@chromium.org> Cr-Commit-Position: refs/heads/master@{#72094}
35 lines
1.0 KiB
JavaScript
35 lines
1.0 KiB
JavaScript
// Copyright 2017 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-typed-funcref --wasm-loop-unrolling
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load("test/mjsunit/wasm/wasm-module-builder.js");
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(function MultiBlockResultTest() {
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let builder = new WasmModuleBuilder();
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builder.addFunction("main", kSig_i_i)
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.addBody([
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...wasmI32Const(1),
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kExprLet, kWasmStmt, 1, 1, kWasmI32,
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kExprLoop, kWasmStmt,
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...wasmI32Const(10),
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kExprLet, kWasmStmt, 1, 1, kWasmI32,
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kExprLocalGet, 0,
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kExprLocalGet, 1,
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kExprI32Sub,
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kExprLocalGet, 2,
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kExprI32Add,
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kExprReturn, // (second let) - (first let) + parameter
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kExprEnd,
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kExprEnd,
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kExprEnd,
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...wasmI32Const(0)])
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.exportAs("main");
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let module = new WebAssembly.Module(builder.toBuffer());
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let instance = new WebAssembly.Instance(module);
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assertEquals(instance.exports.main(100), 109);
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})();
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