Use CommonNodeCache for heap constants in ChangeLowering.

test/cctest/compiler/test-node-cache.cc

-// Copyright 2014 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 "src/v8.h"
-
-#include "graph-tester.h"
-#include "src/compiler/common-operator.h"
-#include "src/compiler/node-cache.h"
-
-using namespace v8::internal;
-using namespace v8::internal::compiler;
-
-TEST(Int32Constant_back_to_back) {
-  GraphTester graph;
-  Int32NodeCache cache;
-
-  for (int i = -2000000000; i < 2000000000; i += 3315177) {
-    Node** pos = cache.Find(graph.zone(), i);
-    CHECK_NE(NULL, pos);
-    for (int j = 0; j < 3; j++) {
-      Node** npos = cache.Find(graph.zone(), i);
-      CHECK_EQ(pos, npos);
-    }
-  }
-}
-
-
-TEST(Int32Constant_five) {
-  GraphTester graph;
-  Int32NodeCache cache;
-  CommonOperatorBuilder common(graph.zone());
-
-  int32_t constants[] = {static_cast<int32_t>(0x80000000), -77, 0, 1, -1};
-
-  Node* nodes[ARRAY_SIZE(constants)];
-
-  for (size_t i = 0; i < ARRAY_SIZE(constants); i++) {
-    int32_t k = constants[i];
-    Node* node = graph.NewNode(common.Int32Constant(k));
-    *cache.Find(graph.zone(), k) = nodes[i] = node;
-  }
-
-  for (size_t i = 0; i < ARRAY_SIZE(constants); i++) {
-    int32_t k = constants[i];
-    CHECK_EQ(nodes[i], *cache.Find(graph.zone(), k));
-  }
-}
-
-
-TEST(Int32Constant_hits) {
-  GraphTester graph;
-  Int32NodeCache cache;
-  const int32_t kSize = 1500;
-  Node** nodes = graph.zone()->NewArray<Node*>(kSize);
-  CommonOperatorBuilder common(graph.zone());
-
-  for (int i = 0; i < kSize; i++) {
-    int32_t v = i * -55;
-    nodes[i] = graph.NewNode(common.Int32Constant(v));
-    *cache.Find(graph.zone(), v) = nodes[i];
-  }
-
-  int hits = 0;
-  for (int i = 0; i < kSize; i++) {
-    int32_t v = i * -55;
-    Node** pos = cache.Find(graph.zone(), v);
-    if (*pos != NULL) {
-      CHECK_EQ(nodes[i], *pos);
-      hits++;
-    }
-  }
-  CHECK_LT(4, hits);
-}
-
-
-TEST(Int64Constant_back_to_back) {
-  GraphTester graph;
-  Int64NodeCache cache;
-
-  for (int64_t i = -2000000000; i < 2000000000; i += 3315177) {
-    Node** pos = cache.Find(graph.zone(), i);
-    CHECK_NE(NULL, pos);
-    for (int j = 0; j < 3; j++) {
-      Node** npos = cache.Find(graph.zone(), i);
-      CHECK_EQ(pos, npos);
-    }
-  }
-}
-
-
-TEST(Int64Constant_hits) {
-  GraphTester graph;
-  Int64NodeCache cache;
-  const int32_t kSize = 1500;
-  Node** nodes = graph.zone()->NewArray<Node*>(kSize);
-  CommonOperatorBuilder common(graph.zone());
-
-  for (int i = 0; i < kSize; i++) {
-    int64_t v = static_cast<int64_t>(i) * static_cast<int64_t>(5003001);
-    nodes[i] = graph.NewNode(common.Int32Constant(i));
-    *cache.Find(graph.zone(), v) = nodes[i];
-  }
-
-  int hits = 0;
-  for (int i = 0; i < kSize; i++) {
-    int64_t v = static_cast<int64_t>(i) * static_cast<int64_t>(5003001);
-    Node** pos = cache.Find(graph.zone(), v);
-    if (*pos != NULL) {
-      CHECK_EQ(nodes[i], *pos);
-      hits++;
-    }
-  }
-  CHECK_LT(4, hits);
-}
-
-
-TEST(PtrConstant_back_to_back) {
-  GraphTester graph;
-  PtrNodeCache cache;
-  int32_t buffer[50];
-
-  for (int32_t* p = buffer;
-       (p - buffer) < static_cast<ptrdiff_t>(ARRAY_SIZE(buffer)); p++) {
-    Node** pos = cache.Find(graph.zone(), p);
-    CHECK_NE(NULL, pos);
-    for (int j = 0; j < 3; j++) {
-      Node** npos = cache.Find(graph.zone(), p);
-      CHECK_EQ(pos, npos);
-    }
-  }
-}
-
-
-TEST(PtrConstant_hits) {
-  GraphTester graph;
-  PtrNodeCache cache;
-  const int32_t kSize = 50;
-  int32_t buffer[kSize];
-  Node* nodes[kSize];
-  CommonOperatorBuilder common(graph.zone());
-
-  for (size_t i = 0; i < ARRAY_SIZE(buffer); i++) {
-    int k = static_cast<int>(i);
-    int32_t* p = &buffer[i];
-    nodes[i] = graph.NewNode(common.Int32Constant(k));
-    *cache.Find(graph.zone(), p) = nodes[i];
-  }
-
-  int hits = 0;
-  for (size_t i = 0; i < ARRAY_SIZE(buffer); i++) {
-    int32_t* p = &buffer[i];
-    Node** pos = cache.Find(graph.zone(), p);
-    if (*pos != NULL) {
-      CHECK_EQ(nodes[i], *pos);
-      hits++;
-    }
-  }
-  CHECK_LT(4, hits);
-}