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v8/test/cctest/test-feedback-vector.cc
Ross McIlroy 21784e3d94 [Lite] Disable ICs in lite mode 
BUG=v8:8293

Change-Id: I1d0e75f8671d3ec1c899c65bb9a865f2358173de
Reviewed-on: https://chromium-review.googlesource.com/c/1280527
Commit-Queue: Ross McIlroy <rmcilroy@chromium.org>
Reviewed-by: Dan Elphick <delphick@chromium.org>
Cr-Commit-Position: refs/heads/master@{#57042}
2018-10-26 16:07:20 +00:00

755 lines
24 KiB
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// 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 "test/cctest/cctest.h"
#include "src/api-inl.h"
#include "src/debug/debug.h"
#include "src/execution.h"
#include "src/global-handles.h"
#include "src/heap/factory.h"
#include "src/macro-assembler.h"
#include "src/objects-inl.h"
#include "test/cctest/test-feedback-vector.h"
namespace v8 {
namespace internal {
namespace {
#define CHECK_SLOT_KIND(helper, index, expected_kind) \
CHECK_EQ(expected_kind, helper.vector()->GetKind(helper.slot(index)));
static Handle<JSFunction> GetFunction(const char* name) {
v8::MaybeLocal<v8::Value> v8_f = CcTest::global()->Get(
v8::Isolate::GetCurrent()->GetCurrentContext(), v8_str(name));
Handle<JSFunction> f =
Handle<JSFunction>::cast(v8::Utils::OpenHandle(*v8_f.ToLocalChecked()));
return f;
}
TEST(VectorStructure) {
LocalContext context;
v8::HandleScope scope(context->GetIsolate());
Isolate* isolate = CcTest::i_isolate();
Factory* factory = isolate->factory();
Zone zone(isolate->allocator(), ZONE_NAME);
Handle<FeedbackVector> vector;
{
FeedbackVectorSpec one_slot(&zone);
one_slot.AddForInSlot();
vector = NewFeedbackVector(isolate, &one_slot);
FeedbackVectorHelper helper(vector);
CHECK_EQ(1, helper.slot_count());
}
{
FeedbackVectorSpec one_icslot(&zone);
one_icslot.AddCallICSlot();
vector = NewFeedbackVector(isolate, &one_icslot);
FeedbackVectorHelper helper(vector);
CHECK_EQ(1, helper.slot_count());
}
{
FeedbackVectorSpec spec(&zone);
for (int i = 0; i < 3; i++) {
spec.AddForInSlot();
}
for (int i = 0; i < 5; i++) {
spec.AddCallICSlot();
}
vector = NewFeedbackVector(isolate, &spec);
FeedbackVectorHelper helper(vector);
CHECK_EQ(8, helper.slot_count());
int index = vector->GetIndex(helper.slot(0));
CHECK_EQ(helper.slot(0), vector->ToSlot(index));
index = vector->GetIndex(helper.slot(3));
CHECK_EQ(helper.slot(3), vector->ToSlot(index));
index = vector->GetIndex(helper.slot(7));
CHECK_EQ(3 + 4 * FeedbackMetadata::GetSlotSize(FeedbackSlotKind::kCall),
index);
CHECK_EQ(helper.slot(7), vector->ToSlot(index));
CHECK_EQ(3 + 5 * FeedbackMetadata::GetSlotSize(FeedbackSlotKind::kCall),
vector->length());
}
{
FeedbackVectorSpec spec(&zone);
spec.AddForInSlot();
spec.AddCreateClosureSlot();
spec.AddForInSlot();
vector = NewFeedbackVector(isolate, &spec);
FeedbackVectorHelper helper(vector);
CHECK_EQ(1,
FeedbackMetadata::GetSlotSize(FeedbackSlotKind::kCreateClosure));
FeedbackSlot slot = helper.slot(1);
FeedbackCell* cell =
FeedbackCell::cast(vector->Get(slot)->GetHeapObjectAssumeStrong());
CHECK_EQ(cell->value(), *factory->undefined_value());
}
}
// IC slots need an encoding to recognize what is in there.
TEST(VectorICMetadata) {
LocalContext context;
v8::HandleScope scope(context->GetIsolate());
Isolate* isolate = CcTest::i_isolate();
Zone zone(isolate->allocator(), ZONE_NAME);
FeedbackVectorSpec spec(&zone);
// Set metadata.
for (int i = 0; i < 40; i++) {
switch (i % 4) {
case 0:
spec.AddForInSlot();
break;
case 1:
spec.AddCallICSlot();
break;
case 2:
spec.AddLoadICSlot();
break;
case 3:
spec.AddKeyedLoadICSlot();
break;
}
}
Handle<FeedbackVector> vector = NewFeedbackVector(isolate, &spec);
FeedbackVectorHelper helper(vector);
CHECK_EQ(40, helper.slot_count());
// Meanwhile set some feedback values and type feedback values to
// verify the data structure remains intact.
vector->Set(FeedbackSlot(0), MaybeObject::FromObject(*vector));
// Verify the metadata is correctly set up from the spec.
for (int i = 0; i < 40; i++) {
FeedbackSlotKind kind = vector->GetKind(helper.slot(i));
switch (i % 4) {
case 0:
CHECK_EQ(FeedbackSlotKind::kForIn, kind);
break;
case 1:
CHECK_EQ(FeedbackSlotKind::kCall, kind);
break;
case 2:
CHECK_EQ(FeedbackSlotKind::kLoadProperty, kind);
break;
case 3:
CHECK_EQ(FeedbackSlotKind::kLoadKeyed, kind);
break;
}
}
}
TEST(VectorCallICStates) {
if (!i::FLAG_use_ic) return;
if (i::FLAG_always_opt) return;
CcTest::InitializeVM();
LocalContext context;
v8::HandleScope scope(context->GetIsolate());
Isolate* isolate = CcTest::i_isolate();
// Make sure function f has a call that uses a type feedback slot.
CompileRun(
"function foo() { return 17; }"
"function f(a) { a(); } f(foo);");
Handle<JSFunction> f = GetFunction("f");
// There should be one IC.
Handle<FeedbackVector> feedback_vector =
Handle<FeedbackVector>(f->feedback_vector(), isolate);
FeedbackSlot slot(0);
FeedbackNexus nexus(feedback_vector, slot);
CHECK_EQ(MONOMORPHIC, nexus.StateFromFeedback());
CompileRun("f(function() { return 16; })");
CHECK_EQ(GENERIC, nexus.StateFromFeedback());
// After a collection, state should remain GENERIC.
CcTest::CollectAllGarbage();
CHECK_EQ(GENERIC, nexus.StateFromFeedback());
}
TEST(VectorCallFeedback) {
if (!i::FLAG_use_ic) return;
if (i::FLAG_always_opt) return;
CcTest::InitializeVM();
LocalContext context;
v8::HandleScope scope(context->GetIsolate());
Isolate* isolate = CcTest::i_isolate();
// Make sure function f has a call that uses a type feedback slot.
CompileRun(
"function foo() { return 17; }"
"function f(a) { a(); } f(foo);");
Handle<JSFunction> f = GetFunction("f");
Handle<JSFunction> foo = GetFunction("foo");
// There should be one IC.
Handle<FeedbackVector> feedback_vector =
Handle<FeedbackVector>(f->feedback_vector(), isolate);
FeedbackSlot slot(0);
FeedbackNexus nexus(feedback_vector, slot);
CHECK_EQ(MONOMORPHIC, nexus.StateFromFeedback());
HeapObject* heap_object;
CHECK(nexus.GetFeedback()->GetHeapObjectIfWeak(&heap_object));
CHECK_EQ(*foo, heap_object);
CcTest::CollectAllGarbage();
// It should stay monomorphic even after a GC.
CHECK_EQ(MONOMORPHIC, nexus.StateFromFeedback());
}
TEST(VectorCallFeedbackForArray) {
if (!i::FLAG_use_ic) return;
if (i::FLAG_always_opt) return;
CcTest::InitializeVM();
LocalContext context;
v8::HandleScope scope(context->GetIsolate());
Isolate* isolate = CcTest::i_isolate();
// Make sure function f has a call that uses a type feedback slot.
CompileRun("function f(a) { a(); } f(Array);");
Handle<JSFunction> f = GetFunction("f");
// There should be one IC.
Handle<FeedbackVector> feedback_vector =
Handle<FeedbackVector>(f->feedback_vector(), isolate);
FeedbackSlot slot(0);
FeedbackNexus nexus(feedback_vector, slot);
CHECK_EQ(MONOMORPHIC, nexus.StateFromFeedback());
HeapObject* heap_object;
CHECK(nexus.GetFeedback()->GetHeapObjectIfWeak(&heap_object));
CHECK_EQ(*isolate->array_function(), heap_object);
CcTest::CollectAllGarbage();
// It should stay monomorphic even after a GC.
CHECK_EQ(MONOMORPHIC, nexus.StateFromFeedback());
}
size_t GetFeedbackVectorLength(Isolate* isolate, const char* src,
bool with_oneshot_opt) {
i::FLAG_enable_one_shot_optimization = with_oneshot_opt;
i::Handle<i::Object> i_object = v8::Utils::OpenHandle(*CompileRun(src));
i::Handle<i::JSFunction> f = i::Handle<i::JSFunction>::cast(i_object);
Handle<FeedbackVector> feedback_vector =
Handle<FeedbackVector>(f->feedback_vector(), isolate);
return feedback_vector->length();
}
TEST(OneShotCallICSlotCount) {
if (!i::FLAG_use_ic) return;
if (i::FLAG_always_opt) return;
CcTest::InitializeVM();
LocalContext context;
v8::HandleScope scope(context->GetIsolate());
Isolate* isolate = CcTest::i_isolate();
i::FLAG_compilation_cache = false;
const char* no_call = R"(
function f1() {};
function f2() {};
(function() {
return arguments.callee;
})();
)";
// len = 2 * 1 ldaNamed property
CHECK_EQ(GetFeedbackVectorLength(isolate, no_call, false), 2);
// no slots of named property loads/stores in one shot
CHECK_EQ(GetFeedbackVectorLength(isolate, no_call, true), 0);
const char* single_call = R"(
function f1() {};
function f2() {};
(function() {
f1();
return arguments.callee;
})();
)";
// len = 2 * 1 ldaNamed Slot + 2 * 1 CachedGlobalSlot + 2 * 1 CallICSlot
CHECK_EQ(GetFeedbackVectorLength(isolate, single_call, false), 6);
// len = 2 * 1 CachedGlobalSlot
CHECK_EQ(GetFeedbackVectorLength(isolate, single_call, true), 2);
const char* multiple_calls = R"(
function f1() {};
function f2() {};
(function() {
f1();
f2();
f1();
f2();
return arguments.callee;
})();
)";
// len = 2 * 1 ldaNamedSlot + 2 * 2 CachedGlobalSlot (one for each unique
// function) + 2 * 4 CallICSlot (one for each function call)
CHECK_EQ(GetFeedbackVectorLength(isolate, multiple_calls, false), 14);
// CachedGlobalSlot (one for each unique function)
// len = 2 * 2 CachedGlobalSlot (one for each unique function)
CHECK_EQ(GetFeedbackVectorLength(isolate, multiple_calls, true), 4);
}
TEST(VectorCallCounts) {
if (!i::FLAG_use_ic) return;
if (i::FLAG_always_opt) return;
CcTest::InitializeVM();
LocalContext context;
v8::HandleScope scope(context->GetIsolate());
Isolate* isolate = CcTest::i_isolate();
// Make sure function f has a call that uses a type feedback slot.
CompileRun(
"function foo() { return 17; }"
"function f(a) { a(); } f(foo);");
Handle<JSFunction> f = GetFunction("f");
// There should be one IC.
Handle<FeedbackVector> feedback_vector =
Handle<FeedbackVector>(f->feedback_vector(), isolate);
FeedbackSlot slot(0);
FeedbackNexus nexus(feedback_vector, slot);
CHECK_EQ(MONOMORPHIC, nexus.StateFromFeedback());
CompileRun("f(foo); f(foo);");
CHECK_EQ(MONOMORPHIC, nexus.StateFromFeedback());
CHECK_EQ(3, nexus.GetCallCount());
// Send the IC megamorphic, but we should still have incrementing counts.
CompileRun("f(function() { return 12; });");
CHECK_EQ(GENERIC, nexus.StateFromFeedback());
CHECK_EQ(4, nexus.GetCallCount());
}
TEST(VectorConstructCounts) {
if (!i::FLAG_use_ic) return;
if (i::FLAG_always_opt) return;
CcTest::InitializeVM();
LocalContext context;
v8::HandleScope scope(context->GetIsolate());
Isolate* isolate = CcTest::i_isolate();
// Make sure function f has a call that uses a type feedback slot.
CompileRun(
"function Foo() {}"
"function f(a) { new a(); } f(Foo);");
Handle<JSFunction> f = GetFunction("f");
Handle<FeedbackVector> feedback_vector =
Handle<FeedbackVector>(f->feedback_vector(), isolate);
FeedbackSlot slot(0);
FeedbackNexus nexus(feedback_vector, slot);
CHECK_EQ(MONOMORPHIC, nexus.StateFromFeedback());
CHECK(feedback_vector->Get(slot)->IsWeak());
CompileRun("f(Foo); f(Foo);");
CHECK_EQ(MONOMORPHIC, nexus.StateFromFeedback());
CHECK_EQ(3, nexus.GetCallCount());
// Send the IC megamorphic, but we should still have incrementing counts.
CompileRun("f(function() {});");
CHECK_EQ(GENERIC, nexus.StateFromFeedback());
CHECK_EQ(4, nexus.GetCallCount());
}
TEST(VectorSpeculationMode) {
if (!i::FLAG_use_ic) return;
if (i::FLAG_always_opt) return;
CcTest::InitializeVM();
LocalContext context;
v8::HandleScope scope(context->GetIsolate());
Isolate* isolate = CcTest::i_isolate();
// Make sure function f has a call that uses a type feedback slot.
CompileRun(
"function Foo() {}"
"function f(a) { new a(); } f(Foo);");
Handle<JSFunction> f = GetFunction("f");
Handle<FeedbackVector> feedback_vector =
Handle<FeedbackVector>(f->feedback_vector(), isolate);
FeedbackSlot slot(0);
FeedbackNexus nexus(feedback_vector, slot);
CHECK_EQ(SpeculationMode::kAllowSpeculation, nexus.GetSpeculationMode());
CompileRun("f(Foo); f(Foo);");
CHECK_EQ(3, nexus.GetCallCount());
CHECK_EQ(SpeculationMode::kAllowSpeculation, nexus.GetSpeculationMode());
nexus.SetSpeculationMode(SpeculationMode::kDisallowSpeculation);
CHECK_EQ(SpeculationMode::kDisallowSpeculation, nexus.GetSpeculationMode());
CHECK_EQ(3, nexus.GetCallCount());
nexus.SetSpeculationMode(SpeculationMode::kAllowSpeculation);
CHECK_EQ(SpeculationMode::kAllowSpeculation, nexus.GetSpeculationMode());
CHECK_EQ(3, nexus.GetCallCount());
}
TEST(VectorLoadICStates) {
if (!i::FLAG_use_ic) return;
if (i::FLAG_always_opt) return;
CcTest::InitializeVM();
LocalContext context;
v8::HandleScope scope(context->GetIsolate());
Isolate* isolate = CcTest::i_isolate();
// Make sure function f has a call that uses a type feedback slot.
CompileRun(
"var o = { foo: 3 };"
"function f(a) { return a.foo; } f(o);");
Handle<JSFunction> f = GetFunction("f");
// There should be one IC.
Handle<FeedbackVector> feedback_vector =
Handle<FeedbackVector>(f->feedback_vector(), isolate);
FeedbackSlot slot(0);
FeedbackNexus nexus(feedback_vector, slot);
CHECK_EQ(PREMONOMORPHIC, nexus.StateFromFeedback());
CompileRun("f(o)");
CHECK_EQ(MONOMORPHIC, nexus.StateFromFeedback());
// Verify that the monomorphic map is the one we expect.
v8::MaybeLocal<v8::Value> v8_o =
CcTest::global()->Get(context.local(), v8_str("o"));
Handle<JSObject> o =
Handle<JSObject>::cast(v8::Utils::OpenHandle(*v8_o.ToLocalChecked()));
CHECK_EQ(o->map(), nexus.FindFirstMap());
// Now go polymorphic.
CompileRun("f({ blarg: 3, foo: 2 })");
CHECK_EQ(POLYMORPHIC, nexus.StateFromFeedback());
CompileRun(
"delete o.foo;"
"f(o)");
CHECK_EQ(POLYMORPHIC, nexus.StateFromFeedback());
CompileRun("f({ blarg: 3, torino: 10, foo: 2 })");
CHECK_EQ(POLYMORPHIC, nexus.StateFromFeedback());
MapHandles maps;
nexus.ExtractMaps(&maps);
CHECK_EQ(4, maps.size());
// Finally driven megamorphic.
CompileRun("f({ blarg: 3, gran: 3, torino: 10, foo: 2 })");
CHECK_EQ(MEGAMORPHIC, nexus.StateFromFeedback());
CHECK(!nexus.FindFirstMap());
// After a collection, state should not be reset to PREMONOMORPHIC.
CcTest::CollectAllGarbage();
CHECK_EQ(MEGAMORPHIC, nexus.StateFromFeedback());
}
TEST(VectorLoadGlobalICSlotSharing) {
if (!i::FLAG_use_ic) return;
if (i::FLAG_always_opt) return;
CcTest::InitializeVM();
LocalContext context;
v8::HandleScope scope(context->GetIsolate());
Isolate* isolate = CcTest::i_isolate();
// Function f has 5 LoadGlobalICs: 3 for {o} references outside of "typeof"
// operator and 2 for {o} references inside "typeof" operator.
CompileRun(
"o = 10;"
"function f() {"
" var x = o || 10;"
" var y = typeof o;"
" return o , typeof o, x , y, o;"
"}"
"f();");
Handle<JSFunction> f = GetFunction("f");
// There should be two IC slots for {o} references outside and inside
// typeof operator respectively.
Handle<FeedbackVector> feedback_vector =
Handle<FeedbackVector>(f->feedback_vector(), isolate);
FeedbackVectorHelper helper(feedback_vector);
CHECK_EQ(2, helper.slot_count());
CHECK_SLOT_KIND(helper, 0, FeedbackSlotKind::kLoadGlobalNotInsideTypeof);
CHECK_SLOT_KIND(helper, 1, FeedbackSlotKind::kLoadGlobalInsideTypeof);
FeedbackSlot slot1 = helper.slot(0);
FeedbackSlot slot2 = helper.slot(1);
CHECK_EQ(MONOMORPHIC,
FeedbackNexus(feedback_vector, slot1).StateFromFeedback());
CHECK_EQ(MONOMORPHIC,
FeedbackNexus(feedback_vector, slot2).StateFromFeedback());
}
TEST(VectorLoadICOnSmi) {
if (!i::FLAG_use_ic) return;
if (i::FLAG_always_opt) return;
CcTest::InitializeVM();
LocalContext context;
v8::HandleScope scope(context->GetIsolate());
Isolate* isolate = CcTest::i_isolate();
Heap* heap = isolate->heap();
// Make sure function f has a call that uses a type feedback slot.
CompileRun(
"var o = { foo: 3 };"
"function f(a) { return a.foo; } f(o);");
Handle<JSFunction> f = GetFunction("f");
// There should be one IC.
Handle<FeedbackVector> feedback_vector =
Handle<FeedbackVector>(f->feedback_vector(), isolate);
FeedbackSlot slot(0);
FeedbackNexus nexus(feedback_vector, slot);
CHECK_EQ(PREMONOMORPHIC, nexus.StateFromFeedback());
CompileRun("f(34)");
CHECK_EQ(MONOMORPHIC, nexus.StateFromFeedback());
// Verify that the monomorphic map is the one we expect.
Map* number_map = ReadOnlyRoots(heap).heap_number_map();
CHECK_EQ(number_map, nexus.FindFirstMap());
// Now go polymorphic on o.
CompileRun("f(o)");
CHECK_EQ(POLYMORPHIC, nexus.StateFromFeedback());
MapHandles maps;
nexus.ExtractMaps(&maps);
CHECK_EQ(2, maps.size());
// One of the maps should be the o map.
v8::MaybeLocal<v8::Value> v8_o =
CcTest::global()->Get(context.local(), v8_str("o"));
Handle<JSObject> o =
Handle<JSObject>::cast(v8::Utils::OpenHandle(*v8_o.ToLocalChecked()));
bool number_map_found = false;
bool o_map_found = false;
for (Handle<Map> current : maps) {
if (*current == number_map)
number_map_found = true;
else if (*current == o->map())
o_map_found = true;
}
CHECK(number_map_found && o_map_found);
// The degree of polymorphism doesn't change.
CompileRun("f(100)");
CHECK_EQ(POLYMORPHIC, nexus.StateFromFeedback());
MapHandles maps2;
nexus.ExtractMaps(&maps2);
CHECK_EQ(2, maps2.size());
}
TEST(ReferenceContextAllocatesNoSlots) {
if (!i::FLAG_use_ic) return;
if (i::FLAG_always_opt) return;
CcTest::InitializeVM();
LocalContext context;
v8::HandleScope scope(context->GetIsolate());
Isolate* isolate = CcTest::i_isolate();
{
CompileRun(
"function testvar(x) {"
" y = x;"
" y = a;"
" return y;"
"}"
"a = 3;"
"testvar({});");
Handle<JSFunction> f = GetFunction("testvar");
// There should be two LOAD_ICs, one for a and one for y at the end.
Handle<FeedbackVector> feedback_vector =
handle(f->feedback_vector(), isolate);
FeedbackVectorHelper helper(feedback_vector);
CHECK_EQ(3, helper.slot_count());
CHECK_SLOT_KIND(helper, 0, FeedbackSlotKind::kStoreGlobalSloppy);
CHECK_SLOT_KIND(helper, 1, FeedbackSlotKind::kLoadGlobalNotInsideTypeof);
CHECK_SLOT_KIND(helper, 2, FeedbackSlotKind::kLoadGlobalNotInsideTypeof);
}
{
CompileRun(
"function testprop(x) {"
" 'use strict';"
" x.blue = a;"
"}"
"testprop({ blue: 3 });");
Handle<JSFunction> f = GetFunction("testprop");
// There should be one LOAD_IC, for the load of a.
Handle<FeedbackVector> feedback_vector(f->feedback_vector(), isolate);
FeedbackVectorHelper helper(feedback_vector);
CHECK_EQ(2, helper.slot_count());
CHECK_SLOT_KIND(helper, 0, FeedbackSlotKind::kLoadGlobalNotInsideTypeof);
CHECK_SLOT_KIND(helper, 1, FeedbackSlotKind::kStoreNamedStrict);
}
{
CompileRun(
"function testpropfunc(x) {"
" x().blue = a;"
" return x().blue;"
"}"
"function makeresult() { return { blue: 3 }; }"
"testpropfunc(makeresult);");
Handle<JSFunction> f = GetFunction("testpropfunc");
// There should be 1 LOAD_GLOBAL_IC to load x (in both cases), 2 CALL_ICs
// to call x and a LOAD_IC to load blue.
Handle<FeedbackVector> feedback_vector(f->feedback_vector(), isolate);
FeedbackVectorHelper helper(feedback_vector);
CHECK_EQ(5, helper.slot_count());
CHECK_SLOT_KIND(helper, 0, FeedbackSlotKind::kCall);
CHECK_SLOT_KIND(helper, 1, FeedbackSlotKind::kLoadGlobalNotInsideTypeof);
CHECK_SLOT_KIND(helper, 2, FeedbackSlotKind::kStoreNamedSloppy);
CHECK_SLOT_KIND(helper, 3, FeedbackSlotKind::kCall);
CHECK_SLOT_KIND(helper, 4, FeedbackSlotKind::kLoadProperty);
}
{
CompileRun(
"function testkeyedprop(x) {"
" x[0] = a;"
" return x[0];"
"}"
"testkeyedprop([0, 1, 2]);");
Handle<JSFunction> f = GetFunction("testkeyedprop");
// There should be 1 LOAD_GLOBAL_ICs for the load of a, and one
// KEYED_LOAD_IC for the load of x[0] in the return statement.
Handle<FeedbackVector> feedback_vector(f->feedback_vector(), isolate);
FeedbackVectorHelper helper(feedback_vector);
CHECK_EQ(3, helper.slot_count());
CHECK_SLOT_KIND(helper, 0, FeedbackSlotKind::kLoadGlobalNotInsideTypeof);
CHECK_SLOT_KIND(helper, 1, FeedbackSlotKind::kStoreKeyedSloppy);
CHECK_SLOT_KIND(helper, 2, FeedbackSlotKind::kLoadKeyed);
}
{
CompileRun(
"function testkeyedprop(x) {"
" 'use strict';"
" x[0] = a;"
" return x[0];"
"}"
"testkeyedprop([0, 1, 2]);");
Handle<JSFunction> f = GetFunction("testkeyedprop");
// There should be 1 LOAD_GLOBAL_ICs for the load of a, and one
// KEYED_LOAD_IC for the load of x[0] in the return statement.
Handle<FeedbackVector> feedback_vector(f->feedback_vector(), isolate);
FeedbackVectorHelper helper(feedback_vector);
CHECK_EQ(3, helper.slot_count());
CHECK_SLOT_KIND(helper, 0, FeedbackSlotKind::kLoadGlobalNotInsideTypeof);
CHECK_SLOT_KIND(helper, 1, FeedbackSlotKind::kStoreKeyedStrict);
CHECK_SLOT_KIND(helper, 2, FeedbackSlotKind::kLoadKeyed);
}
{
CompileRun(
"function testcompound(x) {"
" 'use strict';"
" x.old = x.young = x.in_between = a;"
" return x.old + x.young;"
"}"
"testcompound({ old: 3, young: 3, in_between: 3 });");
Handle<JSFunction> f = GetFunction("testcompound");
// There should be 1 LOAD_GLOBAL_IC for load of a and 2 LOAD_ICs, for load
// of x.old and x.young.
Handle<FeedbackVector> feedback_vector(f->feedback_vector(), isolate);
FeedbackVectorHelper helper(feedback_vector);
CHECK_EQ(7, helper.slot_count());
CHECK_SLOT_KIND(helper, 0, FeedbackSlotKind::kLoadGlobalNotInsideTypeof);
CHECK_SLOT_KIND(helper, 1, FeedbackSlotKind::kStoreNamedStrict);
CHECK_SLOT_KIND(helper, 2, FeedbackSlotKind::kStoreNamedStrict);
CHECK_SLOT_KIND(helper, 3, FeedbackSlotKind::kStoreNamedStrict);
CHECK_SLOT_KIND(helper, 4, FeedbackSlotKind::kBinaryOp);
CHECK_SLOT_KIND(helper, 5, FeedbackSlotKind::kLoadProperty);
CHECK_SLOT_KIND(helper, 6, FeedbackSlotKind::kLoadProperty);
}
}
TEST(VectorStoreICBasic) {
if (!i::FLAG_use_ic) return;
if (i::FLAG_always_opt) return;
CcTest::InitializeVM();
LocalContext context;
v8::HandleScope scope(context->GetIsolate());
CompileRun(
"function f(a) {"
" a.foo = 5;"
"}"
"var a = { foo: 3 };"
"f(a);"
"f(a);"
"f(a);");
Handle<JSFunction> f = GetFunction("f");
// There should be one IC slot.
Handle<FeedbackVector> feedback_vector(f->feedback_vector(), f->GetIsolate());
FeedbackVectorHelper helper(feedback_vector);
CHECK_EQ(1, helper.slot_count());
FeedbackSlot slot(0);
FeedbackNexus nexus(feedback_vector, slot);
CHECK_EQ(MONOMORPHIC, nexus.StateFromFeedback());
}
TEST(StoreOwnIC) {
if (!i::FLAG_use_ic) return;
if (i::FLAG_always_opt) return;
CcTest::InitializeVM();
LocalContext context;
v8::HandleScope scope(context->GetIsolate());
CompileRun(
"function f(v) {"
" return {a: 0, b: v, c: 0};"
"}"
"f(1);"
"f(2);"
"f(3);");
Handle<JSFunction> f = GetFunction("f");
// There should be one IC slot.
Handle<FeedbackVector> feedback_vector(f->feedback_vector(), f->GetIsolate());
FeedbackVectorHelper helper(feedback_vector);
CHECK_EQ(2, helper.slot_count());
CHECK_SLOT_KIND(helper, 0, FeedbackSlotKind::kLiteral);
CHECK_SLOT_KIND(helper, 1, FeedbackSlotKind::kStoreOwnNamed);
FeedbackNexus nexus(feedback_vector, helper.slot(1));
CHECK_EQ(MONOMORPHIC, nexus.StateFromFeedback());
}
} // namespace
} // namespace internal
} // namespace v8
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