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v8/test/cctest/compiler/test-node.cc
jochen cb7aa79b12 Expose a lower bound of malloc'd memory via heap statistics 
We expect that the majority of malloc'd memory held by V8 is allocated
in Zone objects. Introduce an Allocator class that is used by Zones to
manage memory, and allows for querying the current usage.

BUG=none
R=titzer@chromium.org,bmeurer@chromium.org,jarin@chromium.org
LOG=n
TBR=rossberg@chromium.org

Review URL: https://codereview.chromium.org/1847543002

Cr-Commit-Position: refs/heads/master@{#35196}
2016-04-01 10:01:56 +00:00

807 lines
20 KiB
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// Copyright 2013 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 <functional>
#include "src/compiler/graph.h"
#include "src/compiler/node.h"
#include "src/compiler/operator.h"
#include "test/cctest/cctest.h"
namespace v8 {
namespace internal {
namespace compiler {
#define NONE reinterpret_cast<Node*>(1)
static Operator dummy_operator0(IrOpcode::kParameter, Operator::kNoWrite,
"dummy", 0, 0, 0, 1, 0, 0);
static Operator dummy_operator1(IrOpcode::kParameter, Operator::kNoWrite,
"dummy", 1, 0, 0, 1, 0, 0);
static Operator dummy_operator2(IrOpcode::kParameter, Operator::kNoWrite,
"dummy", 2, 0, 0, 1, 0, 0);
static Operator dummy_operator3(IrOpcode::kParameter, Operator::kNoWrite,
"dummy", 3, 0, 0, 1, 0, 0);
#define CHECK_USES(node, ...) \
do { \
Node* __array[] = {__VA_ARGS__}; \
int __size = \
__array[0] != NONE ? static_cast<int>(arraysize(__array)) : 0; \
CheckUseChain(node, __array, __size); \
} while (false)
namespace {
typedef std::multiset<Node*, std::less<Node*>> NodeMSet;
void CheckUseChain(Node* node, Node** uses, int use_count) {
// Check ownership.
if (use_count == 1) CHECK(node->OwnedBy(uses[0]));
if (use_count > 1) {
for (int i = 0; i < use_count; i++) {
CHECK(!node->OwnedBy(uses[i]));
}
}
// Check the self-reported use count.
CHECK_EQ(use_count, node->UseCount());
// Build the expectation set.
NodeMSet expect_set;
for (int i = 0; i < use_count; i++) {
expect_set.insert(uses[i]);
}
{
// Check that iterating over the uses gives the right counts.
NodeMSet use_set;
for (auto use : node->uses()) {
use_set.insert(use);
}
CHECK(expect_set == use_set);
}
{
// Check that iterating over the use edges gives the right counts,
// input indices, from(), and to() pointers.
NodeMSet use_set;
for (auto edge : node->use_edges()) {
CHECK_EQ(node, edge.to());
CHECK_EQ(node, edge.from()->InputAt(edge.index()));
use_set.insert(edge.from());
}
CHECK(expect_set == use_set);
}
{
// Check the use nodes actually have the node as inputs.
for (Node* use : node->uses()) {
size_t count = 0;
for (Node* input : use->inputs()) {
if (input == node) count++;
}
CHECK_EQ(count, expect_set.count(use));
}
}
}
void CheckInputs(Node* node, Node** inputs, int input_count) {
CHECK_EQ(input_count, node->InputCount());
// Check InputAt().
for (int i = 0; i < static_cast<int>(input_count); i++) {
CHECK_EQ(inputs[i], node->InputAt(i));
}
// Check input iterator.
int index = 0;
for (Node* input : node->inputs()) {
CHECK_EQ(inputs[index], input);
index++;
}
// Check use lists of inputs.
for (int i = 0; i < static_cast<int>(input_count); i++) {
Node* input = inputs[i];
if (!input) continue; // skip null inputs
bool found = false;
// Check regular use list.
for (Node* use : input->uses()) {
if (use == node) {
found = true;
break;
}
}
CHECK(found);
int count = 0;
// Check use edge list.
for (auto edge : input->use_edges()) {
if (edge.from() == node && edge.to() == input && edge.index() == i) {
count++;
}
}
CHECK_EQ(1, count);
}
}
} // namespace
#define CHECK_INPUTS(node, ...) \
do { \
Node* __array[] = {__VA_ARGS__}; \
int __size = \
__array[0] != NONE ? static_cast<int>(arraysize(__array)) : 0; \
CheckInputs(node, __array, __size); \
} while (false)
TEST(NodeUseIteratorReplaceUses) {
base::AccountingAllocator allocator;
Zone zone(&allocator);
Graph graph(&zone);
Node* n0 = graph.NewNode(&dummy_operator0);
Node* n1 = graph.NewNode(&dummy_operator1, n0);
Node* n2 = graph.NewNode(&dummy_operator1, n0);
Node* n3 = graph.NewNode(&dummy_operator0);
CHECK_USES(n0, n1, n2);
CHECK_INPUTS(n1, n0);
CHECK_INPUTS(n2, n0);
n0->ReplaceUses(n3);
CHECK_USES(n0, NONE);
CHECK_USES(n1, NONE);
CHECK_USES(n2, NONE);
CHECK_USES(n3, n1, n2);
CHECK_INPUTS(n1, n3);
CHECK_INPUTS(n2, n3);
}
TEST(NodeUseIteratorReplaceUsesSelf) {
base::AccountingAllocator allocator;
Zone zone(&allocator);
Graph graph(&zone);
Node* n0 = graph.NewNode(&dummy_operator0);
Node* n1 = graph.NewNode(&dummy_operator1, n0);
CHECK_USES(n0, n1);
CHECK_USES(n1, NONE);
n1->ReplaceInput(0, n1); // Create self-reference.
CHECK_USES(n0, NONE);
CHECK_USES(n1, n1);
Node* n2 = graph.NewNode(&dummy_operator0);
n1->ReplaceUses(n2);
CHECK_USES(n0, NONE);
CHECK_USES(n1, NONE);
CHECK_USES(n2, n1);
}
TEST(ReplaceInput) {
base::AccountingAllocator allocator;
Zone zone(&allocator);
Graph graph(&zone);
Node* n0 = graph.NewNode(&dummy_operator0);
Node* n1 = graph.NewNode(&dummy_operator0);
Node* n2 = graph.NewNode(&dummy_operator0);
Node* n3 = graph.NewNode(&dummy_operator3, n0, n1, n2);
Node* n4 = graph.NewNode(&dummy_operator0);
CHECK_USES(n0, n3);
CHECK_USES(n1, n3);
CHECK_USES(n2, n3);
CHECK_USES(n3, NONE);
CHECK_USES(n4, NONE);
CHECK_INPUTS(n3, n0, n1, n2);
n3->ReplaceInput(1, n4);
CHECK_USES(n1, NONE);
CHECK_USES(n4, n3);
CHECK_INPUTS(n3, n0, n4, n2);
}
TEST(OwnedBy) {
base::AccountingAllocator allocator;
Zone zone(&allocator);
Graph graph(&zone);
{
Node* n0 = graph.NewNode(&dummy_operator0);
Node* n1 = graph.NewNode(&dummy_operator0);
CHECK(!n0->OwnedBy(n1));
CHECK(!n1->OwnedBy(n0));
Node* n2 = graph.NewNode(&dummy_operator1, n0);
CHECK(n0->OwnedBy(n2));
CHECK(!n2->OwnedBy(n0));
Node* n3 = graph.NewNode(&dummy_operator1, n0);
CHECK(!n0->OwnedBy(n2));
CHECK(!n0->OwnedBy(n3));
CHECK(!n2->OwnedBy(n0));
CHECK(!n3->OwnedBy(n0));
}
{
Node* n0 = graph.NewNode(&dummy_operator0);
Node* n1 = graph.NewNode(&dummy_operator1, n0);
CHECK(n0->OwnedBy(n1));
CHECK(!n1->OwnedBy(n0));
Node* n2 = graph.NewNode(&dummy_operator1, n0);
CHECK(!n0->OwnedBy(n1));
CHECK(!n0->OwnedBy(n2));
CHECK(!n1->OwnedBy(n0));
CHECK(!n1->OwnedBy(n2));
CHECK(!n2->OwnedBy(n0));
CHECK(!n2->OwnedBy(n1));
Node* n3 = graph.NewNode(&dummy_operator0);
n2->ReplaceInput(0, n3);
CHECK(n0->OwnedBy(n1));
CHECK(!n1->OwnedBy(n0));
CHECK(!n1->OwnedBy(n0));
CHECK(!n1->OwnedBy(n2));
CHECK(!n2->OwnedBy(n0));
CHECK(!n2->OwnedBy(n1));
CHECK(n3->OwnedBy(n2));
CHECK(!n2->OwnedBy(n3));
}
}
TEST(Uses) {
base::AccountingAllocator allocator;
Zone zone(&allocator);
Graph graph(&zone);
Node* n0 = graph.NewNode(&dummy_operator0);
Node* n1 = graph.NewNode(&dummy_operator1, n0);
CHECK_USES(n0, n1);
CHECK_USES(n1, NONE);
Node* n2 = graph.NewNode(&dummy_operator1, n0);
CHECK_USES(n0, n1, n2);
CHECK_USES(n2, NONE);
Node* n3 = graph.NewNode(&dummy_operator1, n0);
CHECK_USES(n0, n1, n2, n3);
CHECK_USES(n3, NONE);
}
TEST(Inputs) {
base::AccountingAllocator allocator;
Zone zone(&allocator);
Graph graph(&zone);
Node* n0 = graph.NewNode(&dummy_operator0);
Node* n1 = graph.NewNode(&dummy_operator1, n0);
Node* n2 = graph.NewNode(&dummy_operator1, n0);
Node* n3 = graph.NewNode(&dummy_operator3, n0, n1, n2);
CHECK_INPUTS(n3, n0, n1, n2);
Node* n4 = graph.NewNode(&dummy_operator3, n0, n1, n2);
n3->AppendInput(graph.zone(), n4);
CHECK_INPUTS(n3, n0, n1, n2, n4);
CHECK_USES(n4, n3);
n3->AppendInput(graph.zone(), n4);
CHECK_INPUTS(n3, n0, n1, n2, n4, n4);
CHECK_USES(n4, n3, n3);
Node* n5 = graph.NewNode(&dummy_operator1, n4);
CHECK_USES(n4, n3, n3, n5);
}
TEST(RemoveInput) {
base::AccountingAllocator allocator;
Zone zone(&allocator);
Graph graph(&zone);
Node* n0 = graph.NewNode(&dummy_operator0);
Node* n1 = graph.NewNode(&dummy_operator1, n0);
Node* n2 = graph.NewNode(&dummy_operator2, n0, n1);
CHECK_INPUTS(n0, NONE);
CHECK_INPUTS(n1, n0);
CHECK_INPUTS(n2, n0, n1);
CHECK_USES(n0, n1, n2);
n1->RemoveInput(0);
CHECK_INPUTS(n1, NONE);
CHECK_USES(n0, n2);
n2->RemoveInput(0);
CHECK_INPUTS(n2, n1);
CHECK_USES(n0, NONE);
CHECK_USES(n1, n2);
n2->RemoveInput(0);
CHECK_INPUTS(n2, NONE);
CHECK_USES(n0, NONE);
CHECK_USES(n1, NONE);
CHECK_USES(n2, NONE);
}
TEST(AppendInputsAndIterator) {
base::AccountingAllocator allocator;
Zone zone(&allocator);
Graph graph(&zone);
Node* n0 = graph.NewNode(&dummy_operator0);
Node* n1 = graph.NewNode(&dummy_operator1, n0);
Node* n2 = graph.NewNode(&dummy_operator2, n0, n1);
CHECK_INPUTS(n0, NONE);
CHECK_INPUTS(n1, n0);
CHECK_INPUTS(n2, n0, n1);
CHECK_USES(n0, n1, n2);
Node* n3 = graph.NewNode(&dummy_operator0);
n2->AppendInput(graph.zone(), n3);
CHECK_INPUTS(n2, n0, n1, n3);
CHECK_USES(n3, n2);
}
TEST(NullInputsSimple) {
base::AccountingAllocator allocator;
Zone zone(&allocator);
Graph graph(&zone);
Node* n0 = graph.NewNode(&dummy_operator0);
Node* n1 = graph.NewNode(&dummy_operator1, n0);
Node* n2 = graph.NewNode(&dummy_operator2, n0, n1);
CHECK_INPUTS(n0, NONE);
CHECK_INPUTS(n1, n0);
CHECK_INPUTS(n2, n0, n1);
CHECK_USES(n0, n1, n2);
n2->ReplaceInput(0, nullptr);
CHECK_INPUTS(n2, NULL, n1);
CHECK_USES(n0, n1);
n2->ReplaceInput(1, nullptr);
CHECK_INPUTS(n2, NULL, NULL);
CHECK_USES(n1, NONE);
}
TEST(NullInputsAppended) {
base::AccountingAllocator allocator;
Zone zone(&allocator);
Graph graph(&zone);
Node* n0 = graph.NewNode(&dummy_operator0);
Node* n1 = graph.NewNode(&dummy_operator1, n0);
Node* n2 = graph.NewNode(&dummy_operator1, n0);
Node* n3 = graph.NewNode(&dummy_operator1, n0);
n3->AppendInput(graph.zone(), n1);
n3->AppendInput(graph.zone(), n2);
CHECK_INPUTS(n3, n0, n1, n2);
CHECK_USES(n0, n1, n2, n3);
CHECK_USES(n1, n3);
CHECK_USES(n2, n3);
n3->ReplaceInput(1, NULL);
CHECK_USES(n1, NONE);
CHECK_INPUTS(n3, n0, NULL, n2);
}
TEST(ReplaceUsesFromAppendedInputs) {
base::AccountingAllocator allocator;
Zone zone(&allocator);
Graph graph(&zone);
Node* n0 = graph.NewNode(&dummy_operator0);
Node* n1 = graph.NewNode(&dummy_operator1, n0);
Node* n2 = graph.NewNode(&dummy_operator1, n0);
Node* n3 = graph.NewNode(&dummy_operator0);
CHECK_INPUTS(n2, n0);
n2->AppendInput(graph.zone(), n1);
CHECK_INPUTS(n2, n0, n1);
CHECK_USES(n1, n2);
n2->AppendInput(graph.zone(), n0);
CHECK_INPUTS(n2, n0, n1, n0);
CHECK_USES(n1, n2);
CHECK_USES(n0, n2, n1, n2);
n0->ReplaceUses(n3);
CHECK_USES(n0, NONE);
CHECK_INPUTS(n2, n3, n1, n3);
CHECK_USES(n3, n2, n1, n2);
}
TEST(ReplaceInputMultipleUses) {
base::AccountingAllocator allocator;
Zone zone(&allocator);
Graph graph(&zone);
Node* n0 = graph.NewNode(&dummy_operator0);
Node* n1 = graph.NewNode(&dummy_operator0);
Node* n2 = graph.NewNode(&dummy_operator1, n0);
n2->ReplaceInput(0, n1);
CHECK_EQ(0, n0->UseCount());
CHECK_EQ(1, n1->UseCount());
Node* n3 = graph.NewNode(&dummy_operator1, n0);
n3->ReplaceInput(0, n1);
CHECK_EQ(0, n0->UseCount());
CHECK_EQ(2, n1->UseCount());
}
TEST(TrimInputCountInline) {
base::AccountingAllocator allocator;
Zone zone(&allocator);
Graph graph(&zone);
{
Node* n0 = graph.NewNode(&dummy_operator0);
Node* n1 = graph.NewNode(&dummy_operator1, n0);
n1->TrimInputCount(1);
CHECK_INPUTS(n1, n0);
CHECK_USES(n0, n1);
}
{
Node* n0 = graph.NewNode(&dummy_operator0);
Node* n1 = graph.NewNode(&dummy_operator1, n0);
n1->TrimInputCount(0);
CHECK_INPUTS(n1, NONE);
CHECK_USES(n0, NONE);
}
{
Node* n0 = graph.NewNode(&dummy_operator0);
Node* n1 = graph.NewNode(&dummy_operator0);
Node* n2 = graph.NewNode(&dummy_operator2, n0, n1);
n2->TrimInputCount(2);
CHECK_INPUTS(n2, n0, n1);
CHECK_USES(n0, n2);
CHECK_USES(n1, n2);
}
{
Node* n0 = graph.NewNode(&dummy_operator0);
Node* n1 = graph.NewNode(&dummy_operator0);
Node* n2 = graph.NewNode(&dummy_operator2, n0, n1);
n2->TrimInputCount(1);
CHECK_INPUTS(n2, n0);
CHECK_USES(n0, n2);
CHECK_USES(n1, NONE);
}
{
Node* n0 = graph.NewNode(&dummy_operator0);
Node* n1 = graph.NewNode(&dummy_operator0);
Node* n2 = graph.NewNode(&dummy_operator2, n0, n1);
n2->TrimInputCount(0);
CHECK_INPUTS(n2, NONE);
CHECK_USES(n0, NONE);
CHECK_USES(n1, NONE);
}
{
Node* n0 = graph.NewNode(&dummy_operator0);
Node* n2 = graph.NewNode(&dummy_operator2, n0, n0);
n2->TrimInputCount(1);
CHECK_INPUTS(n2, n0);
CHECK_USES(n0, n2);
}
{
Node* n0 = graph.NewNode(&dummy_operator0);
Node* n2 = graph.NewNode(&dummy_operator2, n0, n0);
n2->TrimInputCount(0);
CHECK_INPUTS(n2, NONE);
CHECK_USES(n0, NONE);
}
}
TEST(TrimInputCountOutOfLine1) {
base::AccountingAllocator allocator;
Zone zone(&allocator);
Graph graph(&zone);
{
Node* n0 = graph.NewNode(&dummy_operator0);
Node* n1 = graph.NewNode(&dummy_operator0);
n1->AppendInput(graph.zone(), n0);
CHECK_INPUTS(n1, n0);
CHECK_USES(n0, n1);
n1->TrimInputCount(1);
CHECK_INPUTS(n1, n0);
CHECK_USES(n0, n1);
}
{
Node* n0 = graph.NewNode(&dummy_operator0);
Node* n1 = graph.NewNode(&dummy_operator0);
n1->AppendInput(graph.zone(), n0);
CHECK_EQ(1, n1->InputCount());
n1->TrimInputCount(0);
CHECK_EQ(0, n1->InputCount());
CHECK_EQ(0, n0->UseCount());
}
{
Node* n0 = graph.NewNode(&dummy_operator0);
Node* n1 = graph.NewNode(&dummy_operator0);
Node* n2 = graph.NewNode(&dummy_operator0);
n2->AppendInput(graph.zone(), n0);
n2->AppendInput(graph.zone(), n1);
CHECK_INPUTS(n2, n0, n1);
n2->TrimInputCount(2);
CHECK_INPUTS(n2, n0, n1);
CHECK_USES(n0, n2);
CHECK_USES(n1, n2);
CHECK_USES(n2, NONE);
}
{
Node* n0 = graph.NewNode(&dummy_operator0);
Node* n1 = graph.NewNode(&dummy_operator0);
Node* n2 = graph.NewNode(&dummy_operator0);
n2->AppendInput(graph.zone(), n0);
n2->AppendInput(graph.zone(), n1);
CHECK_INPUTS(n2, n0, n1);
n2->TrimInputCount(1);
CHECK_INPUTS(n2, n0);
CHECK_USES(n0, n2);
CHECK_USES(n1, NONE);
CHECK_USES(n2, NONE);
}
{
Node* n0 = graph.NewNode(&dummy_operator0);
Node* n1 = graph.NewNode(&dummy_operator0);
Node* n2 = graph.NewNode(&dummy_operator0);
n2->AppendInput(graph.zone(), n0);
n2->AppendInput(graph.zone(), n1);
CHECK_INPUTS(n2, n0, n1);
n2->TrimInputCount(0);
CHECK_INPUTS(n2, NONE);
CHECK_USES(n0, NONE);
CHECK_USES(n1, NONE);
CHECK_USES(n2, NONE);
}
{
Node* n0 = graph.NewNode(&dummy_operator0);
Node* n2 = graph.NewNode(&dummy_operator0);
n2->AppendInput(graph.zone(), n0);
n2->AppendInput(graph.zone(), n0);
CHECK_INPUTS(n2, n0, n0);
CHECK_USES(n0, n2, n2);
n2->TrimInputCount(1);
CHECK_INPUTS(n2, n0);
CHECK_USES(n0, n2);
}
{
Node* n0 = graph.NewNode(&dummy_operator0);
Node* n2 = graph.NewNode(&dummy_operator0);
n2->AppendInput(graph.zone(), n0);
n2->AppendInput(graph.zone(), n0);
CHECK_INPUTS(n2, n0, n0);
CHECK_USES(n0, n2, n2);
n2->TrimInputCount(0);
CHECK_INPUTS(n2, NONE);
CHECK_USES(n0, NONE);
}
}
TEST(TrimInputCountOutOfLine2) {
base::AccountingAllocator allocator;
Zone zone(&allocator);
Graph graph(&zone);
{
Node* n0 = graph.NewNode(&dummy_operator0);
Node* n1 = graph.NewNode(&dummy_operator0);
Node* n2 = graph.NewNode(&dummy_operator1, n0);
n2->AppendInput(graph.zone(), n1);
CHECK_INPUTS(n2, n0, n1);
n2->TrimInputCount(2);
CHECK_INPUTS(n2, n0, n1);
CHECK_USES(n0, n2);
CHECK_USES(n1, n2);
CHECK_USES(n2, NONE);
}
{
Node* n0 = graph.NewNode(&dummy_operator0);
Node* n1 = graph.NewNode(&dummy_operator0);
Node* n2 = graph.NewNode(&dummy_operator1, n0);
n2->AppendInput(graph.zone(), n1);
CHECK_INPUTS(n2, n0, n1);
n2->TrimInputCount(1);
CHECK_INPUTS(n2, n0);
CHECK_USES(n0, n2);
CHECK_USES(n1, NONE);
CHECK_USES(n2, NONE);
}
{
Node* n0 = graph.NewNode(&dummy_operator0);
Node* n1 = graph.NewNode(&dummy_operator0);
Node* n2 = graph.NewNode(&dummy_operator1, n0);
n2->AppendInput(graph.zone(), n1);
CHECK_INPUTS(n2, n0, n1);
n2->TrimInputCount(0);
CHECK_INPUTS(n2, NONE);
CHECK_USES(n0, NONE);
CHECK_USES(n1, NONE);
CHECK_USES(n2, NONE);
}
{
Node* n0 = graph.NewNode(&dummy_operator0);
Node* n2 = graph.NewNode(&dummy_operator1, n0);
n2->AppendInput(graph.zone(), n0);
CHECK_INPUTS(n2, n0, n0);
CHECK_USES(n0, n2, n2);
n2->TrimInputCount(1);
CHECK_INPUTS(n2, n0);
CHECK_USES(n0, n2);
CHECK_USES(n2, NONE);
}
{
Node* n0 = graph.NewNode(&dummy_operator0);
Node* n2 = graph.NewNode(&dummy_operator1, n0);
n2->AppendInput(graph.zone(), n0);
CHECK_EQ(2, n2->InputCount());
CHECK_EQ(2, n0->UseCount());
n2->TrimInputCount(0);
CHECK_EQ(0, n2->InputCount());
CHECK_EQ(0, n0->UseCount());
CHECK_EQ(0, n2->UseCount());
}
}
TEST(NullAllInputs) {
base::AccountingAllocator allocator;
Zone zone(&allocator);
Graph graph(&zone);
for (int i = 0; i < 2; i++) {
Node* n0 = graph.NewNode(&dummy_operator0);
Node* n1 = graph.NewNode(&dummy_operator1, n0);
Node* n2;
if (i == 0) {
n2 = graph.NewNode(&dummy_operator2, n0, n1);
CHECK_INPUTS(n2, n0, n1);
} else {
n2 = graph.NewNode(&dummy_operator1, n0);
CHECK_INPUTS(n2, n0);
n2->AppendInput(graph.zone(), n1); // with out-of-line input.
CHECK_INPUTS(n2, n0, n1);
}
n0->NullAllInputs();
CHECK_INPUTS(n0, NONE);
CHECK_USES(n0, n1, n2);
n1->NullAllInputs();
CHECK_INPUTS(n1, NULL);
CHECK_INPUTS(n2, n0, n1);
CHECK_USES(n0, n2);
n2->NullAllInputs();
CHECK_INPUTS(n1, NULL);
CHECK_INPUTS(n2, NULL, NULL);
CHECK_USES(n0, NONE);
}
{
Node* n0 = graph.NewNode(&dummy_operator0);
Node* n1 = graph.NewNode(&dummy_operator1, n0);
n1->ReplaceInput(0, n1); // self-reference.
CHECK_INPUTS(n0, NONE);
CHECK_INPUTS(n1, n1);
CHECK_USES(n0, NONE);
CHECK_USES(n1, n1);
n1->NullAllInputs();
CHECK_INPUTS(n0, NONE);
CHECK_INPUTS(n1, NULL);
CHECK_USES(n0, NONE);
CHECK_USES(n1, NONE);
}
}
TEST(AppendAndTrim) {
base::AccountingAllocator allocator;
Zone zone(&allocator);
Graph graph(&zone);
Node* nodes[] = {
graph.NewNode(&dummy_operator0), graph.NewNode(&dummy_operator0),
graph.NewNode(&dummy_operator0), graph.NewNode(&dummy_operator0),
graph.NewNode(&dummy_operator0)};
int max = static_cast<int>(arraysize(nodes));
Node* last = graph.NewNode(&dummy_operator0);
for (int i = 0; i < max; i++) {
last->AppendInput(graph.zone(), nodes[i]);
CheckInputs(last, nodes, i + 1);
for (int j = 0; j < max; j++) {
if (j <= i) CHECK_USES(nodes[j], last);
if (j > i) CHECK_USES(nodes[j], NONE);
}
CHECK_USES(last, NONE);
}
for (int i = max; i >= 0; i--) {
last->TrimInputCount(i);
CheckInputs(last, nodes, i);
for (int j = 0; j < i; j++) {
if (j < i) CHECK_USES(nodes[j], last);
if (j >= i) CHECK_USES(nodes[j], NONE);
}
CHECK_USES(last, NONE);
}
}
} // namespace compiler
} // namespace internal
} // namespace v8
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