252acd7ffc
This reverts commit 0c72c71900.
Reason for revert: Wasm code size increase because not all pipelines use CommonOperatorReducer
Original change's description:
> Move branch inversion on ==0 into platform-agnostic reducer
>
> This change is based on a discussion from
> https://crrev.com/c/v8/v8/+/2053769/4/src/compiler/machine-operator-reducer.cc#1696
> wherein Tobias suggested moving the folding away of ==0 operations out
> of the platform-specific instruction selectors and into the
> MachineOperatorReducer. I noticed that CommonOperatorReducer already
> handles some very similar cases, so I have tried putting the ==0 folding
> into CommonOperatorReducer instead. I'm happy to move it into
> MachineOperatorReducer if that's better; I still don't have a very good
> understanding of how roles are separated among reducers.
>
> Change-Id: Ia0285bd9fafeef29d87cc88654bd6d355d467e8f
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2076498
> Commit-Queue: Seth Brenith <seth.brenith@microsoft.com>
> Reviewed-by: Tobias Tebbi <tebbi@chromium.org>
> Reviewed-by: Clemens Backes <clemensb@chromium.org>
> Reviewed-by: Georg Neis <neis@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#66688}
# Not skipping CQ checks because original CL landed > 1 day ago.
Bug: chromium:1061767
Change-Id: Id1fdfb38357eb514d92ed3be0a683f077202faa4
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2117789
Commit-Queue: Seth Brenith <seth.brenith@microsoft.com>
Reviewed-by: Georg Neis <neis@chromium.org>
Reviewed-by: Tobias Tebbi <tebbi@chromium.org>
Cr-Commit-Position: refs/heads/master@{#66862}
547 lines
20 KiB
C++
547 lines
20 KiB
C++
// Copyright 2014 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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#include "src/compiler/common-operator-reducer.h"
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#include "src/codegen/machine-type.h"
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#include "src/compiler/common-operator.h"
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#include "src/compiler/machine-operator.h"
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#include "src/compiler/operator.h"
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#include "src/compiler/simplified-operator.h"
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#include "test/unittests/compiler/graph-reducer-unittest.h"
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#include "test/unittests/compiler/graph-unittest.h"
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#include "test/unittests/compiler/node-test-utils.h"
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using testing::StrictMock;
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namespace v8 {
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namespace internal {
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namespace compiler {
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namespace common_operator_reducer_unittest {
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class CommonOperatorReducerTest : public GraphTest {
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public:
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explicit CommonOperatorReducerTest(int num_parameters = 1)
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: GraphTest(num_parameters), machine_(zone()), simplified_(zone()) {}
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~CommonOperatorReducerTest() override = default;
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protected:
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Reduction Reduce(
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AdvancedReducer::Editor* editor, Node* node,
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MachineOperatorBuilder::Flags flags = MachineOperatorBuilder::kNoFlags) {
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JSHeapBroker broker(isolate(), zone(), FLAG_trace_heap_broker, false);
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MachineOperatorBuilder machine(zone(), MachineType::PointerRepresentation(),
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flags);
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CommonOperatorReducer reducer(editor, graph(), &broker, common(), &machine,
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zone());
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return reducer.Reduce(node);
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}
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Reduction Reduce(Node* node, MachineOperatorBuilder::Flags flags =
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MachineOperatorBuilder::kNoFlags) {
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StrictMock<MockAdvancedReducerEditor> editor;
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return Reduce(&editor, node, flags);
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}
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MachineOperatorBuilder* machine() { return &machine_; }
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SimplifiedOperatorBuilder* simplified() { return &simplified_; }
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private:
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MachineOperatorBuilder machine_;
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SimplifiedOperatorBuilder simplified_;
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};
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namespace {
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const BranchHint kBranchHints[] = {BranchHint::kNone, BranchHint::kFalse,
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BranchHint::kTrue};
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const MachineRepresentation kMachineRepresentations[] = {
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MachineRepresentation::kBit, MachineRepresentation::kWord8,
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MachineRepresentation::kWord16, MachineRepresentation::kWord32,
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MachineRepresentation::kWord64, MachineRepresentation::kFloat32,
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MachineRepresentation::kFloat64, MachineRepresentation::kTagged};
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const Operator kOp0(0, Operator::kNoProperties, "Op0", 0, 0, 0, 1, 1, 0);
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} // namespace
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// -----------------------------------------------------------------------------
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// Branch
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TEST_F(CommonOperatorReducerTest, BranchWithInt32ZeroConstant) {
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TRACED_FOREACH(BranchHint, hint, kBranchHints) {
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Node* const control = graph()->start();
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Node* const branch =
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graph()->NewNode(common()->Branch(hint), Int32Constant(0), control);
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Node* const if_true = graph()->NewNode(common()->IfTrue(), branch);
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Node* const if_false = graph()->NewNode(common()->IfFalse(), branch);
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StrictMock<MockAdvancedReducerEditor> editor;
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EXPECT_CALL(editor, Replace(if_true, IsDead()));
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EXPECT_CALL(editor, Replace(if_false, control));
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Reduction const r = Reduce(&editor, branch);
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ASSERT_TRUE(r.Changed());
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EXPECT_THAT(r.replacement(), IsDead());
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}
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}
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TEST_F(CommonOperatorReducerTest, BranchWithInt32OneConstant) {
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TRACED_FOREACH(BranchHint, hint, kBranchHints) {
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Node* const control = graph()->start();
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Node* const branch =
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graph()->NewNode(common()->Branch(hint), Int32Constant(1), control);
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Node* const if_true = graph()->NewNode(common()->IfTrue(), branch);
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Node* const if_false = graph()->NewNode(common()->IfFalse(), branch);
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StrictMock<MockAdvancedReducerEditor> editor;
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EXPECT_CALL(editor, Replace(if_true, control));
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EXPECT_CALL(editor, Replace(if_false, IsDead()));
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Reduction const r = Reduce(&editor, branch);
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ASSERT_TRUE(r.Changed());
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EXPECT_THAT(r.replacement(), IsDead());
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}
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}
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TEST_F(CommonOperatorReducerTest, BranchWithFalseConstant) {
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TRACED_FOREACH(BranchHint, hint, kBranchHints) {
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Node* const control = graph()->start();
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Node* const branch =
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graph()->NewNode(common()->Branch(hint), FalseConstant(), control);
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Node* const if_true = graph()->NewNode(common()->IfTrue(), branch);
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Node* const if_false = graph()->NewNode(common()->IfFalse(), branch);
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StrictMock<MockAdvancedReducerEditor> editor;
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EXPECT_CALL(editor, Replace(if_true, IsDead()));
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EXPECT_CALL(editor, Replace(if_false, control));
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Reduction const r = Reduce(&editor, branch);
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ASSERT_TRUE(r.Changed());
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EXPECT_THAT(r.replacement(), IsDead());
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}
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}
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TEST_F(CommonOperatorReducerTest, BranchWithTrueConstant) {
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TRACED_FOREACH(BranchHint, hint, kBranchHints) {
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Node* const control = graph()->start();
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Node* const branch =
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graph()->NewNode(common()->Branch(hint), TrueConstant(), control);
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Node* const if_true = graph()->NewNode(common()->IfTrue(), branch);
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Node* const if_false = graph()->NewNode(common()->IfFalse(), branch);
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StrictMock<MockAdvancedReducerEditor> editor;
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EXPECT_CALL(editor, Replace(if_true, control));
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EXPECT_CALL(editor, Replace(if_false, IsDead()));
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Reduction const r = Reduce(&editor, branch);
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ASSERT_TRUE(r.Changed());
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EXPECT_THAT(r.replacement(), IsDead());
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}
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}
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TEST_F(CommonOperatorReducerTest, BranchWithBooleanNot) {
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Node* const value = Parameter(0);
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TRACED_FOREACH(BranchHint, hint, kBranchHints) {
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Node* const control = graph()->start();
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Node* const branch = graph()->NewNode(
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common()->Branch(hint),
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graph()->NewNode(simplified()->BooleanNot(), value), control);
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Node* const if_true = graph()->NewNode(common()->IfTrue(), branch);
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Node* const if_false = graph()->NewNode(common()->IfFalse(), branch);
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Reduction const r = Reduce(branch);
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ASSERT_TRUE(r.Changed());
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EXPECT_EQ(branch, r.replacement());
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EXPECT_THAT(branch, IsBranch(value, control));
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EXPECT_THAT(if_false, IsIfTrue(branch));
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EXPECT_THAT(if_true, IsIfFalse(branch));
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EXPECT_EQ(NegateBranchHint(hint), BranchHintOf(branch->op()));
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}
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}
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TEST_F(CommonOperatorReducerTest, BranchWithSelect) {
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Node* const value = Parameter(0);
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TRACED_FOREACH(BranchHint, hint, kBranchHints) {
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Node* const control = graph()->start();
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Node* const branch = graph()->NewNode(
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common()->Branch(hint),
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graph()->NewNode(common()->Select(MachineRepresentation::kTagged),
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value, FalseConstant(), TrueConstant()),
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control);
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Node* const if_true = graph()->NewNode(common()->IfTrue(), branch);
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Node* const if_false = graph()->NewNode(common()->IfFalse(), branch);
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Reduction const r = Reduce(branch);
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ASSERT_TRUE(r.Changed());
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EXPECT_EQ(branch, r.replacement());
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EXPECT_THAT(branch, IsBranch(value, control));
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EXPECT_THAT(if_false, IsIfTrue(branch));
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EXPECT_THAT(if_true, IsIfFalse(branch));
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EXPECT_EQ(NegateBranchHint(hint), BranchHintOf(branch->op()));
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}
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}
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// -----------------------------------------------------------------------------
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// Merge
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TEST_F(CommonOperatorReducerTest, MergeOfUnusedDiamond0) {
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Node* const value = Parameter(0);
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Node* const control = graph()->start();
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Node* const branch = graph()->NewNode(common()->Branch(), value, control);
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Node* const if_true = graph()->NewNode(common()->IfTrue(), branch);
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Node* const if_false = graph()->NewNode(common()->IfFalse(), branch);
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Reduction const r =
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Reduce(graph()->NewNode(common()->Merge(2), if_true, if_false));
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ASSERT_TRUE(r.Changed());
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EXPECT_EQ(control, r.replacement());
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EXPECT_THAT(branch, IsDead());
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}
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TEST_F(CommonOperatorReducerTest, MergeOfUnusedDiamond1) {
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Node* const value = Parameter(0);
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Node* const control = graph()->start();
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Node* const branch = graph()->NewNode(common()->Branch(), value, control);
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Node* const if_true = graph()->NewNode(common()->IfTrue(), branch);
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Node* const if_false = graph()->NewNode(common()->IfFalse(), branch);
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Reduction const r =
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Reduce(graph()->NewNode(common()->Merge(2), if_false, if_true));
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ASSERT_TRUE(r.Changed());
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EXPECT_EQ(control, r.replacement());
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EXPECT_THAT(branch, IsDead());
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}
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// -----------------------------------------------------------------------------
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// EffectPhi
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TEST_F(CommonOperatorReducerTest, EffectPhiWithMerge) {
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const int kMaxInputs = 64;
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Node* inputs[kMaxInputs];
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Node* const input = graph()->NewNode(&kOp0);
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TRACED_FORRANGE(int, input_count, 2, kMaxInputs - 1) {
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int const value_input_count = input_count - 1;
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for (int i = 0; i < value_input_count; ++i) {
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inputs[i] = graph()->start();
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}
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Node* const merge = graph()->NewNode(common()->Merge(value_input_count),
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value_input_count, inputs);
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for (int i = 0; i < value_input_count; ++i) {
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inputs[i] = input;
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}
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inputs[value_input_count] = merge;
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StrictMock<MockAdvancedReducerEditor> editor;
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EXPECT_CALL(editor, Revisit(merge));
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Reduction r =
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Reduce(&editor, graph()->NewNode(common()->EffectPhi(value_input_count),
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input_count, inputs));
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ASSERT_TRUE(r.Changed());
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EXPECT_EQ(input, r.replacement());
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}
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}
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TEST_F(CommonOperatorReducerTest, EffectPhiWithLoop) {
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Node* const e0 = graph()->NewNode(&kOp0);
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Node* const loop =
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graph()->NewNode(common()->Loop(2), graph()->start(), graph()->start());
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loop->ReplaceInput(1, loop);
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Node* const ephi = graph()->NewNode(common()->EffectPhi(2), e0, e0, loop);
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ephi->ReplaceInput(1, ephi);
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StrictMock<MockAdvancedReducerEditor> editor;
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EXPECT_CALL(editor, Revisit(loop));
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Reduction const r = Reduce(&editor, ephi);
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ASSERT_TRUE(r.Changed());
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EXPECT_EQ(e0, r.replacement());
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}
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// -----------------------------------------------------------------------------
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// Phi
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TEST_F(CommonOperatorReducerTest, PhiWithMerge) {
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const int kMaxInputs = 64;
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Node* inputs[kMaxInputs];
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Node* const input = graph()->NewNode(&kOp0);
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TRACED_FORRANGE(int, input_count, 2, kMaxInputs - 1) {
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int const value_input_count = input_count - 1;
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TRACED_FOREACH(MachineRepresentation, rep, kMachineRepresentations) {
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for (int i = 0; i < value_input_count; ++i) {
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inputs[i] = graph()->start();
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}
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Node* const merge = graph()->NewNode(common()->Merge(value_input_count),
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value_input_count, inputs);
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for (int i = 0; i < value_input_count; ++i) {
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inputs[i] = input;
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}
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inputs[value_input_count] = merge;
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StrictMock<MockAdvancedReducerEditor> editor;
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EXPECT_CALL(editor, Revisit(merge));
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Reduction r = Reduce(
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&editor, graph()->NewNode(common()->Phi(rep, value_input_count),
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input_count, inputs));
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ASSERT_TRUE(r.Changed());
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EXPECT_EQ(input, r.replacement());
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}
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}
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}
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TEST_F(CommonOperatorReducerTest, PhiWithLoop) {
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Node* const p0 = Parameter(0);
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Node* const loop =
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graph()->NewNode(common()->Loop(2), graph()->start(), graph()->start());
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loop->ReplaceInput(1, loop);
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Node* const phi = graph()->NewNode(
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common()->Phi(MachineRepresentation::kTagged, 2), p0, p0, loop);
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phi->ReplaceInput(1, phi);
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StrictMock<MockAdvancedReducerEditor> editor;
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EXPECT_CALL(editor, Revisit(loop));
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Reduction const r = Reduce(&editor, phi);
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ASSERT_TRUE(r.Changed());
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EXPECT_EQ(p0, r.replacement());
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}
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TEST_F(CommonOperatorReducerTest, PhiToFloat32Abs) {
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Node* p0 = Parameter(0);
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Node* c0 = Float32Constant(0.0);
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Node* check = graph()->NewNode(machine()->Float32LessThan(), c0, p0);
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Node* branch = graph()->NewNode(common()->Branch(), check, graph()->start());
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Node* if_true = graph()->NewNode(common()->IfTrue(), branch);
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Node* vtrue = p0;
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Node* if_false = graph()->NewNode(common()->IfFalse(), branch);
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Node* vfalse = graph()->NewNode(machine()->Float32Sub(), c0, p0);
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Node* merge = graph()->NewNode(common()->Merge(2), if_true, if_false);
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Node* phi = graph()->NewNode(
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common()->Phi(MachineRepresentation::kFloat32, 2), vtrue, vfalse, merge);
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StrictMock<MockAdvancedReducerEditor> editor;
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EXPECT_CALL(editor, Revisit(merge));
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Reduction r = Reduce(&editor, phi);
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ASSERT_TRUE(r.Changed());
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EXPECT_THAT(r.replacement(), IsFloat32Abs(p0));
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}
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TEST_F(CommonOperatorReducerTest, PhiToFloat64Abs) {
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Node* p0 = Parameter(0);
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Node* c0 = Float64Constant(0.0);
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Node* check = graph()->NewNode(machine()->Float64LessThan(), c0, p0);
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Node* branch = graph()->NewNode(common()->Branch(), check, graph()->start());
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Node* if_true = graph()->NewNode(common()->IfTrue(), branch);
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Node* vtrue = p0;
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Node* if_false = graph()->NewNode(common()->IfFalse(), branch);
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Node* vfalse = graph()->NewNode(machine()->Float64Sub(), c0, p0);
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Node* merge = graph()->NewNode(common()->Merge(2), if_true, if_false);
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Node* phi = graph()->NewNode(
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common()->Phi(MachineRepresentation::kFloat64, 2), vtrue, vfalse, merge);
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StrictMock<MockAdvancedReducerEditor> editor;
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EXPECT_CALL(editor, Revisit(merge));
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Reduction r = Reduce(&editor, phi);
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ASSERT_TRUE(r.Changed());
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EXPECT_THAT(r.replacement(), IsFloat64Abs(p0));
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}
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// -----------------------------------------------------------------------------
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// Return
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TEST_F(CommonOperatorReducerTest, ReturnWithPhiAndEffectPhiAndMerge) {
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Node* cond = Parameter(2);
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Node* branch = graph()->NewNode(common()->Branch(), cond, graph()->start());
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Node* if_true = graph()->NewNode(common()->IfTrue(), branch);
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Node* etrue = graph()->start();
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Node* vtrue = Parameter(0);
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Node* if_false = graph()->NewNode(common()->IfFalse(), branch);
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Node* efalse = graph()->start();
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Node* vfalse = Parameter(1);
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Node* merge = graph()->NewNode(common()->Merge(2), if_true, if_false);
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Node* ephi = graph()->NewNode(common()->EffectPhi(2), etrue, efalse, merge);
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Node* phi = graph()->NewNode(common()->Phi(MachineRepresentation::kTagged, 2),
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vtrue, vfalse, merge);
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Node* zero = graph()->NewNode(common()->Int32Constant(0));
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Node* ret = graph()->NewNode(common()->Return(), zero, phi, ephi, merge);
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graph()->SetEnd(graph()->NewNode(common()->End(1), ret));
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StrictMock<MockAdvancedReducerEditor> editor;
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EXPECT_CALL(editor, Replace(merge, IsDead()));
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Reduction const r = Reduce(&editor, ret);
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ASSERT_TRUE(r.Changed());
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EXPECT_THAT(r.replacement(), IsDead());
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EXPECT_THAT(graph()->end(), IsEnd(ret, IsReturn(vtrue, etrue, if_true),
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IsReturn(vfalse, efalse, if_false)));
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}
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TEST_F(CommonOperatorReducerTest, MultiReturnWithPhiAndEffectPhiAndMerge) {
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Node* cond = Parameter(2);
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Node* branch = graph()->NewNode(common()->Branch(), cond, graph()->start());
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Node* if_true = graph()->NewNode(common()->IfTrue(), branch);
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Node* etrue = graph()->start();
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Node* vtrue1 = Parameter(0);
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Node* vtrue2 = Parameter(1);
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Node* if_false = graph()->NewNode(common()->IfFalse(), branch);
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Node* efalse = graph()->start();
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Node* vfalse1 = Parameter(1);
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Node* vfalse2 = Parameter(0);
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Node* merge = graph()->NewNode(common()->Merge(2), if_true, if_false);
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Node* ephi = graph()->NewNode(common()->EffectPhi(2), etrue, efalse, merge);
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Node* phi1 = graph()->NewNode(
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common()->Phi(MachineRepresentation::kTagged, 2), vtrue1, vfalse1, merge);
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Node* phi2 = graph()->NewNode(
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common()->Phi(MachineRepresentation::kTagged, 2), vtrue2, vfalse2, merge);
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Node* zero = graph()->NewNode(common()->Int32Constant(0));
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Node* ret =
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graph()->NewNode(common()->Return(2), zero, phi1, phi2, ephi, merge);
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graph()->SetEnd(graph()->NewNode(common()->End(1), ret));
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StrictMock<MockAdvancedReducerEditor> editor;
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Reduction const r = Reduce(&editor, ret);
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// For now a return with multiple return values should not be reduced.
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ASSERT_TRUE(!r.Changed());
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}
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// -----------------------------------------------------------------------------
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// Select
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TEST_F(CommonOperatorReducerTest, SelectWithSameThenAndElse) {
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Node* const input = graph()->NewNode(&kOp0);
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TRACED_FOREACH(BranchHint, hint, kBranchHints) {
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TRACED_FOREACH(MachineRepresentation, rep, kMachineRepresentations) {
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Reduction r = Reduce(
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graph()->NewNode(common()->Select(rep, hint), input, input, input));
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ASSERT_TRUE(r.Changed());
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|
EXPECT_EQ(input, r.replacement());
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
TEST_F(CommonOperatorReducerTest, SelectWithInt32ZeroConstant) {
|
|
Node* p0 = Parameter(0);
|
|
Node* p1 = Parameter(1);
|
|
Node* select =
|
|
graph()->NewNode(common()->Select(MachineRepresentation::kTagged),
|
|
Int32Constant(0), p0, p1);
|
|
Reduction r = Reduce(select);
|
|
ASSERT_TRUE(r.Changed());
|
|
EXPECT_EQ(p1, r.replacement());
|
|
}
|
|
|
|
|
|
TEST_F(CommonOperatorReducerTest, SelectWithInt32OneConstant) {
|
|
Node* p0 = Parameter(0);
|
|
Node* p1 = Parameter(1);
|
|
Node* select =
|
|
graph()->NewNode(common()->Select(MachineRepresentation::kTagged),
|
|
Int32Constant(1), p0, p1);
|
|
Reduction r = Reduce(select);
|
|
ASSERT_TRUE(r.Changed());
|
|
EXPECT_EQ(p0, r.replacement());
|
|
}
|
|
|
|
|
|
TEST_F(CommonOperatorReducerTest, SelectWithFalseConstant) {
|
|
Node* p0 = Parameter(0);
|
|
Node* p1 = Parameter(1);
|
|
Node* select =
|
|
graph()->NewNode(common()->Select(MachineRepresentation::kTagged),
|
|
FalseConstant(), p0, p1);
|
|
Reduction r = Reduce(select);
|
|
ASSERT_TRUE(r.Changed());
|
|
EXPECT_EQ(p1, r.replacement());
|
|
}
|
|
|
|
|
|
TEST_F(CommonOperatorReducerTest, SelectWithTrueConstant) {
|
|
Node* p0 = Parameter(0);
|
|
Node* p1 = Parameter(1);
|
|
Node* select = graph()->NewNode(
|
|
common()->Select(MachineRepresentation::kTagged), TrueConstant(), p0, p1);
|
|
Reduction r = Reduce(select);
|
|
ASSERT_TRUE(r.Changed());
|
|
EXPECT_EQ(p0, r.replacement());
|
|
}
|
|
|
|
|
|
TEST_F(CommonOperatorReducerTest, SelectToFloat32Abs) {
|
|
Node* p0 = Parameter(0);
|
|
Node* c0 = Float32Constant(0.0);
|
|
Node* check = graph()->NewNode(machine()->Float32LessThan(), c0, p0);
|
|
Node* select =
|
|
graph()->NewNode(common()->Select(MachineRepresentation::kFloat32), check,
|
|
p0, graph()->NewNode(machine()->Float32Sub(), c0, p0));
|
|
Reduction r = Reduce(select);
|
|
ASSERT_TRUE(r.Changed());
|
|
EXPECT_THAT(r.replacement(), IsFloat32Abs(p0));
|
|
}
|
|
|
|
|
|
TEST_F(CommonOperatorReducerTest, SelectToFloat64Abs) {
|
|
Node* p0 = Parameter(0);
|
|
Node* c0 = Float64Constant(0.0);
|
|
Node* check = graph()->NewNode(machine()->Float64LessThan(), c0, p0);
|
|
Node* select =
|
|
graph()->NewNode(common()->Select(MachineRepresentation::kFloat64), check,
|
|
p0, graph()->NewNode(machine()->Float64Sub(), c0, p0));
|
|
Reduction r = Reduce(select);
|
|
ASSERT_TRUE(r.Changed());
|
|
EXPECT_THAT(r.replacement(), IsFloat64Abs(p0));
|
|
}
|
|
|
|
// -----------------------------------------------------------------------------
|
|
// Switch
|
|
|
|
TEST_F(CommonOperatorReducerTest, SwitchInputMatchesCaseWithDefault) {
|
|
Node* const control = graph()->start();
|
|
|
|
Node* sw = graph()->NewNode(common()->Switch(2), Int32Constant(1), control);
|
|
Node* const if_1 = graph()->NewNode(common()->IfValue(1), sw);
|
|
graph()->NewNode(common()->IfDefault(), sw);
|
|
|
|
StrictMock<MockAdvancedReducerEditor> editor;
|
|
EXPECT_CALL(editor, Replace(if_1, control));
|
|
Reduction r = Reduce(&editor, sw);
|
|
ASSERT_TRUE(r.Changed());
|
|
EXPECT_THAT(r.replacement(), IsDead());
|
|
}
|
|
|
|
TEST_F(CommonOperatorReducerTest, SwitchInputMatchesDefaultWithCase) {
|
|
Node* const control = graph()->start();
|
|
|
|
Node* sw = graph()->NewNode(common()->Switch(2), Int32Constant(0), control);
|
|
graph()->NewNode(common()->IfValue(1), sw);
|
|
Node* const if_default = graph()->NewNode(common()->IfDefault(), sw);
|
|
|
|
StrictMock<MockAdvancedReducerEditor> editor;
|
|
EXPECT_CALL(editor, Replace(if_default, control));
|
|
Reduction r = Reduce(&editor, sw);
|
|
ASSERT_TRUE(r.Changed());
|
|
EXPECT_THAT(r.replacement(), IsDead());
|
|
}
|
|
|
|
TEST_F(CommonOperatorReducerTest, SwitchInputMatchesCaseExtraCaseWithDefault) {
|
|
Node* const control = graph()->start();
|
|
|
|
Node* sw = graph()->NewNode(common()->Switch(3), Int32Constant(0), control);
|
|
Node* const if_0 = graph()->NewNode(common()->IfValue(0), sw);
|
|
graph()->NewNode(common()->IfValue(1), sw);
|
|
graph()->NewNode(common()->IfDefault(), sw);
|
|
|
|
StrictMock<MockAdvancedReducerEditor> editor;
|
|
EXPECT_CALL(editor, Replace(if_0, control));
|
|
Reduction r = Reduce(&editor, sw);
|
|
ASSERT_TRUE(r.Changed());
|
|
EXPECT_THAT(r.replacement(), IsDead());
|
|
}
|
|
|
|
} // namespace common_operator_reducer_unittest
|
|
} // namespace compiler
|
|
} // namespace internal
|
|
} // namespace v8
|