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v8/test/unittests/compiler/scheduler-rpo-unittest.cc
Manos Koukoutos 2a0584bfe8 [test] Remove some unused includes (2) 
Mostly test/fuzzer, test/inspector, test/unittests.

Bug: v8:13006
Change-Id: I825efa5d72a224bb3cb9f86a9fac8763e9dbd1cf
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3769696
Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
Commit-Queue: Manos Koukoutos <manoskouk@chromium.org>
Cr-Commit-Position: refs/heads/main@{#81799}
2022-07-19 08:55:55 +00:00

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// Copyright 2015 the V8 project authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include <memory>
#include "src/compiler/schedule.h"
#include "src/compiler/scheduler.h"
#include "test/unittests/test-utils.h"
#include "testing/gmock/include/gmock/gmock.h"
using testing::AnyOf;
namespace v8 {
namespace internal {
namespace compiler {
class SchedulerRPOTest : public TestWithZone {
public:
SchedulerRPOTest() = default;
void CheckRPONumbers(BasicBlockVector* order, size_t expected,
bool loops_allowed) {
CHECK(expected == order->size());
for (int i = 0; i < static_cast<int>(order->size()); i++) {
CHECK(order->at(i)->rpo_number() == i);
if (!loops_allowed) {
CHECK(!order->at(i)->loop_end());
CHECK(!order->at(i)->loop_header());
}
}
}
void CheckLoop(BasicBlockVector* order, BasicBlock** blocks, int body_size) {
BasicBlock* header = blocks[0];
BasicBlock* end = header->loop_end();
CHECK(end);
CHECK_GT(end->rpo_number(), 0);
CHECK_EQ(body_size, end->rpo_number() - header->rpo_number());
for (int i = 0; i < body_size; i++) {
CHECK_GE(blocks[i]->rpo_number(), header->rpo_number());
CHECK_LT(blocks[i]->rpo_number(), end->rpo_number());
CHECK(header->LoopContains(blocks[i]));
CHECK(header->IsLoopHeader() || blocks[i]->loop_header() == header);
}
if (header->rpo_number() > 0) {
CHECK_NE(order->at(header->rpo_number() - 1)->loop_header(), header);
}
if (end->rpo_number() < static_cast<int>(order->size())) {
CHECK_NE(order->at(end->rpo_number())->loop_header(), header);
}
}
struct TestLoop {
int count;
BasicBlock** nodes;
BasicBlock* header() { return nodes[0]; }
BasicBlock* last() { return nodes[count - 1]; }
~TestLoop() { delete[] nodes; }
};
TestLoop* CreateLoop(Schedule* schedule, int count) {
TestLoop* loop = new TestLoop();
loop->count = count;
loop->nodes = new BasicBlock*[count];
for (int i = 0; i < count; i++) {
loop->nodes[i] = schedule->NewBasicBlock();
if (i > 0) {
schedule->AddSuccessorForTesting(loop->nodes[i - 1], loop->nodes[i]);
}
}
schedule->AddSuccessorForTesting(loop->nodes[count - 1], loop->nodes[0]);
return loop;
}
};
TEST_F(SchedulerRPOTest, Degenerate1) {
Schedule schedule(zone());
BasicBlockVector* order = Scheduler::ComputeSpecialRPO(zone(), &schedule);
CheckRPONumbers(order, 1, false);
EXPECT_EQ(schedule.start(), order->at(0));
}
TEST_F(SchedulerRPOTest, Degenerate2) {
Schedule schedule(zone());
schedule.AddGoto(schedule.start(), schedule.end());
BasicBlockVector* order = Scheduler::ComputeSpecialRPO(zone(), &schedule);
CheckRPONumbers(order, 2, false);
EXPECT_EQ(schedule.start(), order->at(0));
EXPECT_EQ(schedule.end(), order->at(1));
}
TEST_F(SchedulerRPOTest, Line) {
for (int i = 0; i < 10; i++) {
Schedule schedule(zone());
BasicBlock* last = schedule.start();
for (int j = 0; j < i; j++) {
BasicBlock* block = schedule.NewBasicBlock();
block->set_deferred(i & 1);
schedule.AddGoto(last, block);
last = block;
}
BasicBlockVector* order = Scheduler::ComputeSpecialRPO(zone(), &schedule);
CheckRPONumbers(order, 1 + i, false);
for (size_t j = 0; j < schedule.BasicBlockCount(); j++) {
BasicBlock* block = schedule.GetBlockById(BasicBlock::Id::FromSize(j));
if (block->rpo_number() >= 0 && block->SuccessorCount() == 1) {
EXPECT_EQ(block->rpo_number() + 1, block->SuccessorAt(0)->rpo_number());
}
}
}
}
TEST_F(SchedulerRPOTest, SelfLoop) {
Schedule schedule(zone());
schedule.AddSuccessorForTesting(schedule.start(), schedule.start());
BasicBlockVector* order = Scheduler::ComputeSpecialRPO(zone(), &schedule);
CheckRPONumbers(order, 1, true);
BasicBlock* loop[] = {schedule.start()};
CheckLoop(order, loop, 1);
}
TEST_F(SchedulerRPOTest, EntryLoop) {
Schedule schedule(zone());
BasicBlock* body = schedule.NewBasicBlock();
schedule.AddSuccessorForTesting(schedule.start(), body);
schedule.AddSuccessorForTesting(body, schedule.start());
BasicBlockVector* order = Scheduler::ComputeSpecialRPO(zone(), &schedule);
CheckRPONumbers(order, 2, true);
BasicBlock* loop[] = {schedule.start(), body};
CheckLoop(order, loop, 2);
}
TEST_F(SchedulerRPOTest, EndLoop) {
Schedule schedule(zone());
std::unique_ptr<TestLoop> loop1(CreateLoop(&schedule, 2));
schedule.AddSuccessorForTesting(schedule.start(), loop1->header());
BasicBlockVector* order = Scheduler::ComputeSpecialRPO(zone(), &schedule);
CheckRPONumbers(order, 3, true);
CheckLoop(order, loop1->nodes, loop1->count);
}
TEST_F(SchedulerRPOTest, EndLoopNested) {
Schedule schedule(zone());
std::unique_ptr<TestLoop> loop1(CreateLoop(&schedule, 2));
schedule.AddSuccessorForTesting(schedule.start(), loop1->header());
schedule.AddSuccessorForTesting(loop1->last(), schedule.start());
BasicBlockVector* order = Scheduler::ComputeSpecialRPO(zone(), &schedule);
CheckRPONumbers(order, 3, true);
CheckLoop(order, loop1->nodes, loop1->count);
}
TEST_F(SchedulerRPOTest, Diamond) {
Schedule schedule(zone());
BasicBlock* A = schedule.start();
BasicBlock* B = schedule.NewBasicBlock();
BasicBlock* C = schedule.NewBasicBlock();
BasicBlock* D = schedule.end();
schedule.AddSuccessorForTesting(A, B);
schedule.AddSuccessorForTesting(A, C);
schedule.AddSuccessorForTesting(B, D);
schedule.AddSuccessorForTesting(C, D);
BasicBlockVector* order = Scheduler::ComputeSpecialRPO(zone(), &schedule);
CheckRPONumbers(order, 4, false);
EXPECT_EQ(0, A->rpo_number());
EXPECT_THAT(B->rpo_number(), AnyOf(1, 2));
EXPECT_THAT(C->rpo_number(), AnyOf(1, 2));
EXPECT_EQ(3, D->rpo_number());
}
TEST_F(SchedulerRPOTest, Loop1) {
Schedule schedule(zone());
BasicBlock* A = schedule.start();
BasicBlock* B = schedule.NewBasicBlock();
BasicBlock* C = schedule.NewBasicBlock();
BasicBlock* D = schedule.end();
schedule.AddSuccessorForTesting(A, B);
schedule.AddSuccessorForTesting(B, C);
schedule.AddSuccessorForTesting(C, B);
schedule.AddSuccessorForTesting(C, D);
BasicBlockVector* order = Scheduler::ComputeSpecialRPO(zone(), &schedule);
CheckRPONumbers(order, 4, true);
BasicBlock* loop[] = {B, C};
CheckLoop(order, loop, 2);
}
TEST_F(SchedulerRPOTest, Loop2) {
Schedule schedule(zone());
BasicBlock* A = schedule.start();
BasicBlock* B = schedule.NewBasicBlock();
BasicBlock* C = schedule.NewBasicBlock();
BasicBlock* D = schedule.end();
schedule.AddSuccessorForTesting(A, B);
schedule.AddSuccessorForTesting(B, C);
schedule.AddSuccessorForTesting(C, B);
schedule.AddSuccessorForTesting(B, D);
BasicBlockVector* order = Scheduler::ComputeSpecialRPO(zone(), &schedule);
CheckRPONumbers(order, 4, true);
BasicBlock* loop[] = {B, C};
CheckLoop(order, loop, 2);
}
TEST_F(SchedulerRPOTest, LoopN) {
for (int i = 0; i < 11; i++) {
Schedule schedule(zone());
BasicBlock* A = schedule.start();
BasicBlock* B = schedule.NewBasicBlock();
BasicBlock* C = schedule.NewBasicBlock();
BasicBlock* D = schedule.NewBasicBlock();
BasicBlock* E = schedule.NewBasicBlock();
BasicBlock* F = schedule.NewBasicBlock();
BasicBlock* G = schedule.end();
schedule.AddSuccessorForTesting(A, B);
schedule.AddSuccessorForTesting(B, C);
schedule.AddSuccessorForTesting(C, D);
schedule.AddSuccessorForTesting(D, E);
schedule.AddSuccessorForTesting(E, F);
schedule.AddSuccessorForTesting(F, B);
schedule.AddSuccessorForTesting(B, G);
// Throw in extra backedges from time to time.
if (i == 1) schedule.AddSuccessorForTesting(B, B);
if (i == 2) schedule.AddSuccessorForTesting(C, B);
if (i == 3) schedule.AddSuccessorForTesting(D, B);
if (i == 4) schedule.AddSuccessorForTesting(E, B);
if (i == 5) schedule.AddSuccessorForTesting(F, B);
// Throw in extra loop exits from time to time.
if (i == 6) schedule.AddSuccessorForTesting(B, G);
if (i == 7) schedule.AddSuccessorForTesting(C, G);
if (i == 8) schedule.AddSuccessorForTesting(D, G);
if (i == 9) schedule.AddSuccessorForTesting(E, G);
if (i == 10) schedule.AddSuccessorForTesting(F, G);
BasicBlockVector* order = Scheduler::ComputeSpecialRPO(zone(), &schedule);
CheckRPONumbers(order, 7, true);
BasicBlock* loop[] = {B, C, D, E, F};
CheckLoop(order, loop, 5);
}
}
TEST_F(SchedulerRPOTest, LoopNest1) {
Schedule schedule(zone());
BasicBlock* A = schedule.start();
BasicBlock* B = schedule.NewBasicBlock();
BasicBlock* C = schedule.NewBasicBlock();
BasicBlock* D = schedule.NewBasicBlock();
BasicBlock* E = schedule.NewBasicBlock();
BasicBlock* F = schedule.end();
schedule.AddSuccessorForTesting(A, B);
schedule.AddSuccessorForTesting(B, C);
schedule.AddSuccessorForTesting(C, D);
schedule.AddSuccessorForTesting(D, C);
schedule.AddSuccessorForTesting(D, E);
schedule.AddSuccessorForTesting(E, B);
schedule.AddSuccessorForTesting(E, F);
BasicBlockVector* order = Scheduler::ComputeSpecialRPO(zone(), &schedule);
CheckRPONumbers(order, 6, true);
BasicBlock* loop1[] = {B, C, D, E};
CheckLoop(order, loop1, 4);
BasicBlock* loop2[] = {C, D};
CheckLoop(order, loop2, 2);
}
TEST_F(SchedulerRPOTest, LoopNest2) {
Schedule schedule(zone());
BasicBlock* A = schedule.start();
BasicBlock* B = schedule.NewBasicBlock();
BasicBlock* C = schedule.NewBasicBlock();
BasicBlock* D = schedule.NewBasicBlock();
BasicBlock* E = schedule.NewBasicBlock();
BasicBlock* F = schedule.NewBasicBlock();
BasicBlock* G = schedule.NewBasicBlock();
BasicBlock* H = schedule.end();
schedule.AddSuccessorForTesting(A, B);
schedule.AddSuccessorForTesting(B, C);
schedule.AddSuccessorForTesting(C, D);
schedule.AddSuccessorForTesting(D, E);
schedule.AddSuccessorForTesting(E, F);
schedule.AddSuccessorForTesting(F, G);
schedule.AddSuccessorForTesting(G, H);
schedule.AddSuccessorForTesting(E, D);
schedule.AddSuccessorForTesting(F, C);
schedule.AddSuccessorForTesting(G, B);
BasicBlockVector* order = Scheduler::ComputeSpecialRPO(zone(), &schedule);
CheckRPONumbers(order, 8, true);
BasicBlock* loop1[] = {B, C, D, E, F, G};
CheckLoop(order, loop1, 6);
BasicBlock* loop2[] = {C, D, E, F};
CheckLoop(order, loop2, 4);
BasicBlock* loop3[] = {D, E};
CheckLoop(order, loop3, 2);
}
TEST_F(SchedulerRPOTest, LoopFollow1) {
Schedule schedule(zone());
std::unique_ptr<TestLoop> loop1(CreateLoop(&schedule, 1));
std::unique_ptr<TestLoop> loop2(CreateLoop(&schedule, 1));
BasicBlock* A = schedule.start();
BasicBlock* E = schedule.end();
schedule.AddSuccessorForTesting(A, loop1->header());
schedule.AddSuccessorForTesting(loop1->header(), loop2->header());
schedule.AddSuccessorForTesting(loop2->last(), E);
BasicBlockVector* order = Scheduler::ComputeSpecialRPO(zone(), &schedule);
EXPECT_EQ(schedule.BasicBlockCount(), order->size());
CheckLoop(order, loop1->nodes, loop1->count);
CheckLoop(order, loop2->nodes, loop2->count);
}
TEST_F(SchedulerRPOTest, LoopFollow2) {
Schedule schedule(zone());
std::unique_ptr<TestLoop> loop1(CreateLoop(&schedule, 1));
std::unique_ptr<TestLoop> loop2(CreateLoop(&schedule, 1));
BasicBlock* A = schedule.start();
BasicBlock* S = schedule.NewBasicBlock();
BasicBlock* E = schedule.end();
schedule.AddSuccessorForTesting(A, loop1->header());
schedule.AddSuccessorForTesting(loop1->header(), S);
schedule.AddSuccessorForTesting(S, loop2->header());
schedule.AddSuccessorForTesting(loop2->last(), E);
BasicBlockVector* order = Scheduler::ComputeSpecialRPO(zone(), &schedule);
EXPECT_EQ(schedule.BasicBlockCount(), order->size());
CheckLoop(order, loop1->nodes, loop1->count);
CheckLoop(order, loop2->nodes, loop2->count);
}
TEST_F(SchedulerRPOTest, LoopFollowN) {
for (int size = 1; size < 5; size++) {
for (int exit = 0; exit < size; exit++) {
Schedule schedule(zone());
std::unique_ptr<TestLoop> loop1(CreateLoop(&schedule, size));
std::unique_ptr<TestLoop> loop2(CreateLoop(&schedule, size));
BasicBlock* A = schedule.start();
BasicBlock* E = schedule.end();
schedule.AddSuccessorForTesting(A, loop1->header());
schedule.AddSuccessorForTesting(loop1->nodes[exit], loop2->header());
schedule.AddSuccessorForTesting(loop2->nodes[exit], E);
BasicBlockVector* order = Scheduler::ComputeSpecialRPO(zone(), &schedule);
EXPECT_EQ(schedule.BasicBlockCount(), order->size());
CheckLoop(order, loop1->nodes, loop1->count);
CheckLoop(order, loop2->nodes, loop2->count);
}
}
}
TEST_F(SchedulerRPOTest, NestedLoopFollow1) {
Schedule schedule(zone());
std::unique_ptr<TestLoop> loop1(CreateLoop(&schedule, 1));
std::unique_ptr<TestLoop> loop2(CreateLoop(&schedule, 1));
BasicBlock* A = schedule.start();
BasicBlock* B = schedule.NewBasicBlock();
BasicBlock* C = schedule.NewBasicBlock();
BasicBlock* E = schedule.end();
schedule.AddSuccessorForTesting(A, B);
schedule.AddSuccessorForTesting(B, loop1->header());
schedule.AddSuccessorForTesting(loop1->header(), loop2->header());
schedule.AddSuccessorForTesting(loop2->last(), C);
schedule.AddSuccessorForTesting(C, E);
schedule.AddSuccessorForTesting(C, B);
BasicBlockVector* order = Scheduler::ComputeSpecialRPO(zone(), &schedule);
EXPECT_EQ(schedule.BasicBlockCount(), order->size());
CheckLoop(order, loop1->nodes, loop1->count);
CheckLoop(order, loop2->nodes, loop2->count);
BasicBlock* loop3[] = {B, loop1->nodes[0], loop2->nodes[0], C};
CheckLoop(order, loop3, 4);
}
TEST_F(SchedulerRPOTest, LoopBackedges1) {
int size = 8;
for (int i = 0; i < size; i++) {
for (int j = 0; j < size; j++) {
Schedule schedule(zone());
BasicBlock* A = schedule.start();
BasicBlock* E = schedule.end();
std::unique_ptr<TestLoop> loop1(CreateLoop(&schedule, size));
schedule.AddSuccessorForTesting(A, loop1->header());
schedule.AddSuccessorForTesting(loop1->last(), E);
schedule.AddSuccessorForTesting(loop1->nodes[i], loop1->header());
schedule.AddSuccessorForTesting(loop1->nodes[j], E);
BasicBlockVector* order = Scheduler::ComputeSpecialRPO(zone(), &schedule);
CheckRPONumbers(order, schedule.BasicBlockCount(), true);
CheckLoop(order, loop1->nodes, loop1->count);
}
}
}
TEST_F(SchedulerRPOTest, LoopOutedges1) {
int size = 8;
for (int i = 0; i < size; i++) {
for (int j = 0; j < size; j++) {
Schedule schedule(zone());
BasicBlock* A = schedule.start();
BasicBlock* D = schedule.NewBasicBlock();
BasicBlock* E = schedule.end();
std::unique_ptr<TestLoop> loop1(CreateLoop(&schedule, size));
schedule.AddSuccessorForTesting(A, loop1->header());
schedule.AddSuccessorForTesting(loop1->last(), E);
schedule.AddSuccessorForTesting(loop1->nodes[i], loop1->header());
schedule.AddSuccessorForTesting(loop1->nodes[j], D);
schedule.AddSuccessorForTesting(D, E);
BasicBlockVector* order = Scheduler::ComputeSpecialRPO(zone(), &schedule);
CheckRPONumbers(order, schedule.BasicBlockCount(), true);
CheckLoop(order, loop1->nodes, loop1->count);
}
}
}
TEST_F(SchedulerRPOTest, LoopOutedges2) {
int size = 8;
for (int i = 0; i < size; i++) {
Schedule schedule(zone());
BasicBlock* A = schedule.start();
BasicBlock* E = schedule.end();
std::unique_ptr<TestLoop> loop1(CreateLoop(&schedule, size));
schedule.AddSuccessorForTesting(A, loop1->header());
schedule.AddSuccessorForTesting(loop1->last(), E);
for (int j = 0; j < size; j++) {
BasicBlock* O = schedule.NewBasicBlock();
schedule.AddSuccessorForTesting(loop1->nodes[j], O);
schedule.AddSuccessorForTesting(O, E);
}
BasicBlockVector* order = Scheduler::ComputeSpecialRPO(zone(), &schedule);
CheckRPONumbers(order, schedule.BasicBlockCount(), true);
CheckLoop(order, loop1->nodes, loop1->count);
}
}
TEST_F(SchedulerRPOTest, LoopOutloops1) {
int size = 8;
for (int i = 0; i < size; i++) {
Schedule schedule(zone());
BasicBlock* A = schedule.start();
BasicBlock* E = schedule.end();
std::unique_ptr<TestLoop> loop1(CreateLoop(&schedule, size));
schedule.AddSuccessorForTesting(A, loop1->header());
schedule.AddSuccessorForTesting(loop1->last(), E);
TestLoop** loopN = new TestLoop*[size];
for (int j = 0; j < size; j++) {
loopN[j] = CreateLoop(&schedule, 2);
schedule.AddSuccessorForTesting(loop1->nodes[j], loopN[j]->header());
schedule.AddSuccessorForTesting(loopN[j]->last(), E);
}
BasicBlockVector* order = Scheduler::ComputeSpecialRPO(zone(), &schedule);
CheckRPONumbers(order, schedule.BasicBlockCount(), true);
CheckLoop(order, loop1->nodes, loop1->count);
for (int j = 0; j < size; j++) {
CheckLoop(order, loopN[j]->nodes, loopN[j]->count);
delete loopN[j];
}
delete[] loopN;
}
}
TEST_F(SchedulerRPOTest, LoopMultibackedge) {
Schedule schedule(zone());
BasicBlock* A = schedule.start();
BasicBlock* B = schedule.NewBasicBlock();
BasicBlock* C = schedule.NewBasicBlock();
BasicBlock* D = schedule.NewBasicBlock();
BasicBlock* E = schedule.NewBasicBlock();
schedule.AddSuccessorForTesting(A, B);
schedule.AddSuccessorForTesting(B, C);
schedule.AddSuccessorForTesting(B, D);
schedule.AddSuccessorForTesting(B, E);
schedule.AddSuccessorForTesting(C, B);
schedule.AddSuccessorForTesting(D, B);
schedule.AddSuccessorForTesting(E, B);
BasicBlockVector* order = Scheduler::ComputeSpecialRPO(zone(), &schedule);
CheckRPONumbers(order, 5, true);
BasicBlock* loop1[] = {B, C, D, E};
CheckLoop(order, loop1, 4);
}
} // namespace compiler
} // namespace internal
} // namespace v8
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