3fe7d698b8
This CL introduces type narrowing and constant folding reducers
to constant fold code that comes out of inlined destructuring
of arrays. In particular, array iterator introduces code that
contains a phi of a temporary array that blocks escape analysis.
The phi comes from conditional that can be evaluated statically
(i.e., constant folded), so with better constant folding we
allow escape analysis to get rid of the temporary array.
On a quick micro-benchmark below, we see more than 6x improvement.
This is close to the hand-optimized version - if we replace
body of f with 'return b + a', we get 220ms (versus 218ms with
destructuring).
function f(a, b) {
[b, a] = [a, b];
return a + b;
}
function sum(count) {
let s = 0;
for (let i = 0; i < count; i++) {
s += f(1, 2);
}
return s;
}
// Warm up
sum(1e5); sum(1e5);
console.time("destructure array");
sum(1e8);
console.timeEnd("destructure array");
console.timeEnd: destructure array, 213.526000
console.timeEnd: destructure array, 1503.537000
Bug: v8:7728
Change-Id: Ib7aec1d5897989e6adb1af1eddd516d8b3866db5
Reviewed-on: https://chromium-review.googlesource.com/1047672
Reviewed-by: Benedikt Meurer <bmeurer@chromium.org>
Commit-Queue: Benedikt Meurer <bmeurer@chromium.org>
Cr-Commit-Position: refs/heads/master@{#53048}
263 lines
9.3 KiB
Plaintext
263 lines
9.3 KiB
Plaintext
# Copyright 2016 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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import("../../gni/v8.gni")
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v8_executable("unittests") {
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testonly = true
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# TODO(machenbach): Translate from gyp.
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#['OS=="aix"', {
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# 'ldflags': [ '-Wl,-bbigtoc' ],
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#}],
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deps = [
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":unittests_sources",
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"../..:v8_for_testing",
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"../..:v8_libbase",
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"../..:v8_libplatform",
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"//build/config:exe_and_shlib_deps",
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"//build/win:default_exe_manifest",
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"//testing/gmock",
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"//testing/gtest",
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]
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data_deps = [
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"../../tools:v8_testrunner",
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]
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data = [
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"testcfg.py",
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"unittests.status",
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]
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configs = [
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"../..:external_config",
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"../..:internal_config_base",
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]
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}
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v8_source_set("unittests_sources") {
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testonly = true
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sources = [
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"../../test/common/wasm/wasm-macro-gen.h",
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"../../testing/gmock-support.h",
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"../../testing/gtest-support.h",
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"allocation-unittest.cc",
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"api/access-check-unittest.cc",
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"api/exception-unittest.cc",
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"api/interceptor-unittest.cc",
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"api/isolate-unittest.cc",
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"api/remote-object-unittest.cc",
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"api/v8-object-unittest.cc",
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"asmjs/asm-scanner-unittest.cc",
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"asmjs/asm-types-unittest.cc",
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"asmjs/switch-logic-unittest.cc",
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"base/atomic-utils-unittest.cc",
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"base/bits-unittest.cc",
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"base/cpu-unittest.cc",
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"base/division-by-constant-unittest.cc",
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"base/flags-unittest.cc",
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"base/functional-unittest.cc",
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"base/ieee754-unittest.cc",
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"base/iterator-unittest.cc",
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"base/logging-unittest.cc",
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"base/macros-unittest.cc",
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"base/ostreams-unittest.cc",
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"base/platform/condition-variable-unittest.cc",
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"base/platform/mutex-unittest.cc",
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"base/platform/platform-unittest.cc",
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"base/platform/semaphore-unittest.cc",
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"base/platform/time-unittest.cc",
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"base/sys-info-unittest.cc",
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"base/template-utils-unittest.cc",
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"base/utils/random-number-generator-unittest.cc",
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"bigint-unittest.cc",
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"cancelable-tasks-unittest.cc",
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"char-predicates-unittest.cc",
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"code-stub-assembler-unittest.cc",
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"code-stub-assembler-unittest.h",
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"compiler-dispatcher/compiler-dispatcher-tracer-unittest.cc",
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"compiler-dispatcher/compiler-dispatcher-unittest.cc",
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"compiler-dispatcher/optimizing-compile-dispatcher-unittest.cc",
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"compiler-dispatcher/unoptimized-compile-job-unittest.cc",
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"compiler/branch-elimination-unittest.cc",
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"compiler/bytecode-analysis-unittest.cc",
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"compiler/checkpoint-elimination-unittest.cc",
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"compiler/code-assembler-unittest.cc",
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"compiler/code-assembler-unittest.h",
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"compiler/common-operator-reducer-unittest.cc",
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"compiler/common-operator-unittest.cc",
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"compiler/compiler-test-utils.h",
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"compiler/constant-folding-reducer-unittest.cc",
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"compiler/control-equivalence-unittest.cc",
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"compiler/control-flow-optimizer-unittest.cc",
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"compiler/dead-code-elimination-unittest.cc",
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"compiler/diamond-unittest.cc",
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"compiler/effect-control-linearizer-unittest.cc",
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"compiler/graph-reducer-unittest.cc",
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"compiler/graph-reducer-unittest.h",
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"compiler/graph-trimmer-unittest.cc",
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"compiler/graph-unittest.cc",
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"compiler/graph-unittest.h",
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"compiler/instruction-selector-unittest.cc",
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"compiler/instruction-selector-unittest.h",
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"compiler/instruction-sequence-unittest.cc",
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"compiler/instruction-sequence-unittest.h",
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"compiler/instruction-unittest.cc",
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"compiler/int64-lowering-unittest.cc",
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"compiler/js-call-reducer-unittest.cc",
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"compiler/js-create-lowering-unittest.cc",
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"compiler/js-intrinsic-lowering-unittest.cc",
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"compiler/js-operator-unittest.cc",
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"compiler/js-typed-lowering-unittest.cc",
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"compiler/linkage-tail-call-unittest.cc",
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"compiler/live-range-builder.h",
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"compiler/load-elimination-unittest.cc",
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"compiler/loop-peeling-unittest.cc",
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"compiler/machine-operator-reducer-unittest.cc",
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"compiler/machine-operator-unittest.cc",
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"compiler/node-cache-unittest.cc",
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"compiler/node-matchers-unittest.cc",
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"compiler/node-properties-unittest.cc",
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"compiler/node-test-utils.cc",
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"compiler/node-test-utils.h",
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"compiler/node-unittest.cc",
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"compiler/opcodes-unittest.cc",
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"compiler/persistent-unittest.cc",
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"compiler/regalloc/live-range-unittest.cc",
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"compiler/regalloc/move-optimizer-unittest.cc",
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"compiler/regalloc/register-allocator-unittest.cc",
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"compiler/schedule-unittest.cc",
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"compiler/scheduler-rpo-unittest.cc",
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"compiler/scheduler-unittest.cc",
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"compiler/simplified-lowering-unittest.cc",
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"compiler/simplified-operator-reducer-unittest.cc",
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"compiler/simplified-operator-unittest.cc",
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"compiler/state-values-utils-unittest.cc",
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"compiler/typed-optimization-unittest.cc",
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"compiler/typer-unittest.cc",
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"compiler/value-numbering-reducer-unittest.cc",
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"compiler/zone-stats-unittest.cc",
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"counters-unittest.cc",
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"detachable-vector-unittest.cc",
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"eh-frame-iterator-unittest.cc",
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"eh-frame-writer-unittest.cc",
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"heap/barrier-unittest.cc",
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"heap/bitmap-unittest.cc",
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"heap/embedder-tracing-unittest.cc",
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"heap/gc-idle-time-handler-unittest.cc",
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"heap/gc-tracer-unittest.cc",
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"heap/heap-unittest.cc",
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"heap/item-parallel-job-unittest.cc",
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"heap/marking-unittest.cc",
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"heap/memory-reducer-unittest.cc",
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"heap/object-stats-unittest.cc",
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"heap/scavenge-job-unittest.cc",
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"heap/slot-set-unittest.cc",
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"heap/spaces-unittest.cc",
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"heap/unmapper-unittest.cc",
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"heap/worklist-unittest.cc",
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"interpreter/bytecode-array-builder-unittest.cc",
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"interpreter/bytecode-array-iterator-unittest.cc",
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"interpreter/bytecode-array-random-iterator-unittest.cc",
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"interpreter/bytecode-array-writer-unittest.cc",
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"interpreter/bytecode-decoder-unittest.cc",
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"interpreter/bytecode-node-unittest.cc",
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"interpreter/bytecode-operands-unittest.cc",
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"interpreter/bytecode-register-allocator-unittest.cc",
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"interpreter/bytecode-register-optimizer-unittest.cc",
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"interpreter/bytecode-source-info-unittest.cc",
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"interpreter/bytecode-utils.h",
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"interpreter/bytecodes-unittest.cc",
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"interpreter/constant-array-builder-unittest.cc",
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"interpreter/interpreter-assembler-unittest.cc",
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"interpreter/interpreter-assembler-unittest.h",
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"libplatform/default-platform-unittest.cc",
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"libplatform/task-queue-unittest.cc",
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"libplatform/worker-thread-unittest.cc",
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"locked-queue-unittest.cc",
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"object-unittest.cc",
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"parser/ast-value-unittest.cc",
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"parser/preparser-unittest.cc",
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"register-configuration-unittest.cc",
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"run-all-unittests.cc",
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"source-position-table-unittest.cc",
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"strings-storage-unittest.cc",
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"test-helpers.cc",
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"test-helpers.h",
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"test-utils.cc",
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"test-utils.h",
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"unicode-unittest.cc",
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"utils-unittest.cc",
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"value-serializer-unittest.cc",
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"wasm/control-transfer-unittest.cc",
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"wasm/decoder-unittest.cc",
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"wasm/function-body-decoder-unittest.cc",
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"wasm/leb-helper-unittest.cc",
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"wasm/loop-assignment-analysis-unittest.cc",
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"wasm/module-decoder-unittest.cc",
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"wasm/streaming-decoder-unittest.cc",
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"wasm/trap-handler-unittest.cc",
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"wasm/wasm-code-manager-unittest.cc",
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"wasm/wasm-macro-gen-unittest.cc",
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"wasm/wasm-module-builder-unittest.cc",
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"wasm/wasm-opcodes-unittest.cc",
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"zone/segmentpool-unittest.cc",
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"zone/zone-allocator-unittest.cc",
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"zone/zone-chunk-list-unittest.cc",
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"zone/zone-unittest.cc",
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]
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if (use_jumbo_build) {
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jumbo_excluded_sources = [
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# TODO(mostynb@opera.com): figure out how to make this build in both
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# modes. Template issues on windows if we add a functional_unittest
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# namespace as with the other files.
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"base/functional-unittest.cc",
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]
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}
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if (v8_current_cpu == "arm") {
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sources += [ "compiler/arm/instruction-selector-arm-unittest.cc" ]
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} else if (v8_current_cpu == "arm64") {
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sources += [ "compiler/arm64/instruction-selector-arm64-unittest.cc" ]
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} else if (v8_current_cpu == "x86") {
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sources += [ "compiler/ia32/instruction-selector-ia32-unittest.cc" ]
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} else if (v8_current_cpu == "mips" || v8_current_cpu == "mipsel") {
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sources += [ "compiler/mips/instruction-selector-mips-unittest.cc" ]
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} else if (v8_current_cpu == "mips64" || v8_current_cpu == "mips64el") {
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sources += [ "compiler/mips64/instruction-selector-mips64-unittest.cc" ]
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} else if (v8_current_cpu == "x64") {
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sources += [ "compiler/x64/instruction-selector-x64-unittest.cc" ]
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} else if (v8_current_cpu == "ppc" || v8_current_cpu == "ppc64") {
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sources += [ "compiler/ppc/instruction-selector-ppc-unittest.cc" ]
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} else if (v8_current_cpu == "s390" || v8_current_cpu == "s390x") {
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sources += [ "compiler/s390/instruction-selector-s390-unittest.cc" ]
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}
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configs = [
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"../..:external_config",
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"../..:internal_config_base",
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]
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deps = [
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"../..:v8_for_testing",
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"../..:v8_libbase",
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"../..:v8_libplatform",
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"//build/config:exe_and_shlib_deps",
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"//build/win:default_exe_manifest",
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"//testing/gmock",
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"//testing/gtest",
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]
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if (is_win) {
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# This warning is benignly triggered by the U16 and U32 macros in
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# bytecode-utils.h.
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# C4309: 'static_cast': truncation of constant value
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cflags = [ "/wd4309" ]
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}
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}
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