blob: ba4f7638f2acf4f58abb5d3e148702fe45c473d6 [file] [log] [blame]
// 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/compiler/compiler-source-position-table.h"
#include "src/compiler/js-context-specialization.h"
#include "src/compiler/js-graph.h"
#include "src/compiler/js-operator.h"
#include "src/compiler/node-matchers.h"
#include "src/compiler/node-properties.h"
#include "src/factory.h"
#include "src/objects-inl.h"
#include "src/property.h"
#include "test/cctest/cctest.h"
#include "test/cctest/compiler/function-tester.h"
#include "test/cctest/compiler/graph-builder-tester.h"
namespace v8 {
namespace internal {
namespace compiler {
class ContextSpecializationTester : public HandleAndZoneScope {
public:
explicit ContextSpecializationTester(Maybe<OuterContext> context)
: graph_(new (main_zone()) Graph(main_zone())),
common_(main_zone()),
javascript_(main_zone()),
machine_(main_zone()),
simplified_(main_zone()),
jsgraph_(main_isolate(), graph(), common(), &javascript_, &simplified_,
&machine_),
reducer_(main_zone(), graph()),
spec_(&reducer_, jsgraph(), context, MaybeHandle<JSFunction>()) {}
JSContextSpecialization* spec() { return &spec_; }
Factory* factory() { return main_isolate()->factory(); }
CommonOperatorBuilder* common() { return &common_; }
JSOperatorBuilder* javascript() { return &javascript_; }
SimplifiedOperatorBuilder* simplified() { return &simplified_; }
JSGraph* jsgraph() { return &jsgraph_; }
Graph* graph() { return graph_; }
void CheckChangesToValue(Node* node, Handle<HeapObject> expected_value);
void CheckContextInputAndDepthChanges(
Node* node, Handle<Context> expected_new_context_object,
size_t expected_new_depth);
void CheckContextInputAndDepthChanges(Node* node, Node* expected_new_context,
size_t expected_new_depth);
private:
Graph* graph_;
CommonOperatorBuilder common_;
JSOperatorBuilder javascript_;
MachineOperatorBuilder machine_;
SimplifiedOperatorBuilder simplified_;
JSGraph jsgraph_;
GraphReducer reducer_;
JSContextSpecialization spec_;
};
void ContextSpecializationTester::CheckChangesToValue(
Node* node, Handle<HeapObject> expected_value) {
Reduction r = spec()->Reduce(node);
CHECK(r.Changed());
HeapObjectMatcher match(r.replacement());
CHECK(match.HasValue());
CHECK_EQ(*match.Value(), *expected_value);
}
void ContextSpecializationTester::CheckContextInputAndDepthChanges(
Node* node, Handle<Context> expected_new_context_object,
size_t expected_new_depth) {
ContextAccess access = OpParameter<ContextAccess>(node);
Reduction r = spec()->Reduce(node);
CHECK(r.Changed());
Node* new_context = NodeProperties::GetContextInput(r.replacement());
CHECK_EQ(IrOpcode::kHeapConstant, new_context->opcode());
HeapObjectMatcher match(new_context);
CHECK_EQ(*match.Value(), *expected_new_context_object);
ContextAccess new_access = OpParameter<ContextAccess>(r.replacement());
CHECK_EQ(new_access.depth(), expected_new_depth);
CHECK_EQ(new_access.index(), access.index());
CHECK_EQ(new_access.immutable(), access.immutable());
}
void ContextSpecializationTester::CheckContextInputAndDepthChanges(
Node* node, Node* expected_new_context, size_t expected_new_depth) {
ContextAccess access = OpParameter<ContextAccess>(node);
Reduction r = spec()->Reduce(node);
CHECK(r.Changed());
Node* new_context = NodeProperties::GetContextInput(r.replacement());
CHECK_EQ(new_context, expected_new_context);
ContextAccess new_access = OpParameter<ContextAccess>(r.replacement());
CHECK_EQ(new_access.depth(), expected_new_depth);
CHECK_EQ(new_access.index(), access.index());
CHECK_EQ(new_access.immutable(), access.immutable());
}
static const int slot_index = Context::NATIVE_CONTEXT_INDEX;
TEST(ReduceJSLoadContext0) {
ContextSpecializationTester t(Nothing<OuterContext>());
Node* start = t.graph()->NewNode(t.common()->Start(0));
t.graph()->SetStart(start);
// Make a context and initialize it a bit for this test.
Handle<Context> native = t.factory()->NewNativeContext();
Handle<Context> subcontext1 = t.factory()->NewNativeContext();
Handle<Context> subcontext2 = t.factory()->NewNativeContext();
subcontext2->set_previous(*subcontext1);
subcontext1->set_previous(*native);
Handle<Object> expected = t.factory()->InternalizeUtf8String("gboy!");
const int slot = Context::NATIVE_CONTEXT_INDEX;
native->set(slot, *expected);
Node* const_context = t.jsgraph()->Constant(native);
Node* deep_const_context = t.jsgraph()->Constant(subcontext2);
Node* param_context = t.graph()->NewNode(t.common()->Parameter(0), start);
{
// Mutable slot, constant context, depth = 0 => do nothing.
Node* load = t.graph()->NewNode(t.javascript()->LoadContext(0, 0, false),
const_context, start);
Reduction r = t.spec()->Reduce(load);
CHECK(!r.Changed());
}
{
// Mutable slot, non-constant context, depth = 0 => do nothing.
Node* load = t.graph()->NewNode(t.javascript()->LoadContext(0, 0, false),
param_context, start);
Reduction r = t.spec()->Reduce(load);
CHECK(!r.Changed());
}
{
// Mutable slot, constant context, depth > 0 => fold-in parent context.
Node* load = t.graph()->NewNode(
t.javascript()->LoadContext(2, Context::GLOBAL_EVAL_FUN_INDEX, false),
deep_const_context, start);
Reduction r = t.spec()->Reduce(load);
CHECK(r.Changed());
Node* new_context_input = NodeProperties::GetContextInput(r.replacement());
CHECK_EQ(IrOpcode::kHeapConstant, new_context_input->opcode());
HeapObjectMatcher match(new_context_input);
CHECK_EQ(*native, *match.Value());
ContextAccess access = OpParameter<ContextAccess>(r.replacement());
CHECK_EQ(Context::GLOBAL_EVAL_FUN_INDEX, static_cast<int>(access.index()));
CHECK_EQ(0, static_cast<int>(access.depth()));
CHECK_EQ(false, access.immutable());
}
{
// Immutable slot, constant context, depth = 0 => specialize.
Node* load = t.graph()->NewNode(t.javascript()->LoadContext(0, slot, true),
const_context, start);
Reduction r = t.spec()->Reduce(load);
CHECK(r.Changed());
CHECK(r.replacement() != load);
HeapObjectMatcher match(r.replacement());
CHECK(match.HasValue());
CHECK_EQ(*expected, *match.Value());
}
}
TEST(ReduceJSLoadContext1) {
// The graph's context chain ends in the incoming context parameter:
//
// context2 <-- context1 <-- context0 (= Parameter(0))
ContextSpecializationTester t(Nothing<OuterContext>());
Node* start = t.graph()->NewNode(t.common()->Start(0));
t.graph()->SetStart(start);
Node* undefined = t.jsgraph()->Constant(t.factory()->undefined_value());
const i::compiler::Operator* create_function_context =
t.javascript()->CreateFunctionContext(42, FUNCTION_SCOPE);
Node* context0 = t.graph()->NewNode(t.common()->Parameter(0), start);
Node* context1 = t.graph()->NewNode(create_function_context, undefined,
context0, start, start);
Node* context2 = t.graph()->NewNode(create_function_context, undefined,
context1, start, start);
{
Node* load = t.graph()->NewNode(
t.javascript()->LoadContext(0, slot_index, false), context2, start);
CHECK(!t.spec()->Reduce(load).Changed());
}
{
Node* load = t.graph()->NewNode(
t.javascript()->LoadContext(0, slot_index, true), context2, start);
CHECK(!t.spec()->Reduce(load).Changed());
}
{
Node* load = t.graph()->NewNode(
t.javascript()->LoadContext(1, slot_index, false), context2, start);
t.CheckContextInputAndDepthChanges(load, context1, 0);
}
{
Node* load = t.graph()->NewNode(
t.javascript()->LoadContext(1, slot_index, true), context2, start);
t.CheckContextInputAndDepthChanges(load, context1, 0);
}
{
Node* load = t.graph()->NewNode(
t.javascript()->LoadContext(2, slot_index, false), context2, start);
t.CheckContextInputAndDepthChanges(load, context0, 0);
}
{
Node* load = t.graph()->NewNode(
t.javascript()->LoadContext(2, slot_index, true), context2, start);
t.CheckContextInputAndDepthChanges(load, context0, 0);
}
{
Node* load = t.graph()->NewNode(
t.javascript()->LoadContext(3, slot_index, false), context2, start);
t.CheckContextInputAndDepthChanges(load, context0, 1);
}
{
Node* load = t.graph()->NewNode(
t.javascript()->LoadContext(3, slot_index, true), context2, start);
t.CheckContextInputAndDepthChanges(load, context0, 1);
}
}
TEST(ReduceJSLoadContext2) {
// The graph's context chain ends in a constant context (context_object1),
// which has another outer context (context_object0).
//
// context2 <-- context1 <-- context0 (= HeapConstant(context_object1))
// context_object1 <~~ context_object0
ContextSpecializationTester t(Nothing<OuterContext>());
Node* start = t.graph()->NewNode(t.common()->Start(0));
t.graph()->SetStart(start);
Node* undefined = t.jsgraph()->Constant(t.factory()->undefined_value());
const i::compiler::Operator* create_function_context =
t.javascript()->CreateFunctionContext(42, FUNCTION_SCOPE);
Handle<HeapObject> slot_value0 = t.factory()->InternalizeUtf8String("0");
Handle<HeapObject> slot_value1 = t.factory()->InternalizeUtf8String("1");
Handle<Context> context_object0 = t.factory()->NewNativeContext();
Handle<Context> context_object1 = t.factory()->NewNativeContext();
context_object1->set_previous(*context_object0);
context_object0->set(slot_index, *slot_value0);
context_object1->set(slot_index, *slot_value1);
Node* context0 = t.jsgraph()->Constant(context_object1);
Node* context1 = t.graph()->NewNode(create_function_context, undefined,
context0, start, start);
Node* context2 = t.graph()->NewNode(create_function_context, undefined,
context1, start, start);
{
Node* load = t.graph()->NewNode(
t.javascript()->LoadContext(0, slot_index, false), context2, start);
CHECK(!t.spec()->Reduce(load).Changed());
}
{
Node* load = t.graph()->NewNode(
t.javascript()->LoadContext(0, slot_index, true), context2, start);
CHECK(!t.spec()->Reduce(load).Changed());
}
{
Node* load = t.graph()->NewNode(
t.javascript()->LoadContext(1, slot_index, false), context2, start);
t.CheckContextInputAndDepthChanges(load, context1, 0);
}
{
Node* load = t.graph()->NewNode(
t.javascript()->LoadContext(1, slot_index, true), context2, start);
t.CheckContextInputAndDepthChanges(load, context1, 0);
}
{
Node* load = t.graph()->NewNode(
t.javascript()->LoadContext(2, slot_index, false), context2, start);
t.CheckContextInputAndDepthChanges(load, context0, 0);
}
{
Node* load = t.graph()->NewNode(
t.javascript()->LoadContext(2, slot_index, true), context2, start);
t.CheckChangesToValue(load, slot_value1);
}
{
Node* load = t.graph()->NewNode(
t.javascript()->LoadContext(3, slot_index, false), context2, start);
t.CheckContextInputAndDepthChanges(load, context_object0, 0);
}
{
Node* load = t.graph()->NewNode(
t.javascript()->LoadContext(3, slot_index, true), context2, start);
t.CheckChangesToValue(load, slot_value0);
}
}
TEST(ReduceJSLoadContext3) {
// Like in ReduceJSLoadContext1, the graph's context chain ends in the
// incoming context parameter. However, this time we provide a concrete
// context for this parameter as the "specialization context". We choose
// context_object2 from ReduceJSLoadContext2 for this, so almost all test
// expectations are the same as in ReduceJSLoadContext2.
HandleAndZoneScope handle_zone_scope;
auto factory = handle_zone_scope.main_isolate()->factory();
Handle<HeapObject> slot_value0 = factory->InternalizeUtf8String("0");
Handle<HeapObject> slot_value1 = factory->InternalizeUtf8String("1");
Handle<Context> context_object0 = factory->NewNativeContext();
Handle<Context> context_object1 = factory->NewNativeContext();
context_object1->set_previous(*context_object0);
context_object0->set(slot_index, *slot_value0);
context_object1->set(slot_index, *slot_value1);
ContextSpecializationTester t(Just(OuterContext(context_object1, 0)));
Node* start = t.graph()->NewNode(t.common()->Start(2));
t.graph()->SetStart(start);
Node* undefined = t.jsgraph()->Constant(t.factory()->undefined_value());
const i::compiler::Operator* create_function_context =
t.javascript()->CreateFunctionContext(42, FUNCTION_SCOPE);
Node* context0 = t.graph()->NewNode(t.common()->Parameter(0), start);
Node* context1 = t.graph()->NewNode(create_function_context, undefined,
context0, start, start);
Node* context2 = t.graph()->NewNode(create_function_context, undefined,
context1, start, start);
{
Node* load = t.graph()->NewNode(
t.javascript()->LoadContext(0, slot_index, false), context2, start);
CHECK(!t.spec()->Reduce(load).Changed());
}
{
Node* load = t.graph()->NewNode(
t.javascript()->LoadContext(0, slot_index, true), context2, start);
CHECK(!t.spec()->Reduce(load).Changed());
}
{
Node* load = t.graph()->NewNode(
t.javascript()->LoadContext(1, slot_index, false), context2, start);
t.CheckContextInputAndDepthChanges(load, context1, 0);
}
{
Node* load = t.graph()->NewNode(
t.javascript()->LoadContext(1, slot_index, true), context2, start);
t.CheckContextInputAndDepthChanges(load, context1, 0);
}
{
Node* load = t.graph()->NewNode(
t.javascript()->LoadContext(2, slot_index, false), context2, start);
t.CheckContextInputAndDepthChanges(load, context_object1, 0);
}
{
Node* load = t.graph()->NewNode(
t.javascript()->LoadContext(2, slot_index, true), context2, start);
t.CheckChangesToValue(load, slot_value1);
}
{
Node* load = t.graph()->NewNode(
t.javascript()->LoadContext(3, slot_index, false), context2, start);
t.CheckContextInputAndDepthChanges(load, context_object0, 0);
}
{
Node* load = t.graph()->NewNode(
t.javascript()->LoadContext(3, slot_index, true), context2, start);
t.CheckChangesToValue(load, slot_value0);
}
}
TEST(ReduceJSStoreContext0) {
ContextSpecializationTester t(Nothing<OuterContext>());
Node* start = t.graph()->NewNode(t.common()->Start(0));
t.graph()->SetStart(start);
// Make a context and initialize it a bit for this test.
Handle<Context> native = t.factory()->NewNativeContext();
Handle<Context> subcontext1 = t.factory()->NewNativeContext();
Handle<Context> subcontext2 = t.factory()->NewNativeContext();
subcontext2->set_previous(*subcontext1);
subcontext1->set_previous(*native);
Handle<Object> expected = t.factory()->InternalizeUtf8String("gboy!");
const int slot = Context::NATIVE_CONTEXT_INDEX;
native->set(slot, *expected);
Node* const_context = t.jsgraph()->Constant(native);
Node* deep_const_context = t.jsgraph()->Constant(subcontext2);
Node* param_context = t.graph()->NewNode(t.common()->Parameter(0), start);
{
// Mutable slot, constant context, depth = 0 => do nothing.
Node* load = t.graph()->NewNode(t.javascript()->StoreContext(0, 0),
const_context, const_context, start, start);
Reduction r = t.spec()->Reduce(load);
CHECK(!r.Changed());
}
{
// Mutable slot, non-constant context, depth = 0 => do nothing.
Node* load = t.graph()->NewNode(t.javascript()->StoreContext(0, 0),
param_context, param_context, start, start);
Reduction r = t.spec()->Reduce(load);
CHECK(!r.Changed());
}
{
// Immutable slot, constant context, depth = 0 => do nothing.
Node* load = t.graph()->NewNode(t.javascript()->StoreContext(0, slot),
const_context, const_context, start, start);
Reduction r = t.spec()->Reduce(load);
CHECK(!r.Changed());
}
{
// Mutable slot, constant context, depth > 0 => fold-in parent context.
Node* load = t.graph()->NewNode(
t.javascript()->StoreContext(2, Context::GLOBAL_EVAL_FUN_INDEX),
deep_const_context, deep_const_context, start, start);
Reduction r = t.spec()->Reduce(load);
CHECK(r.Changed());
Node* new_context_input = NodeProperties::GetContextInput(r.replacement());
CHECK_EQ(IrOpcode::kHeapConstant, new_context_input->opcode());
HeapObjectMatcher match(new_context_input);
CHECK_EQ(*native, *match.Value());
ContextAccess access = OpParameter<ContextAccess>(r.replacement());
CHECK_EQ(Context::GLOBAL_EVAL_FUN_INDEX, static_cast<int>(access.index()));
CHECK_EQ(0, static_cast<int>(access.depth()));
CHECK_EQ(false, access.immutable());
}
}
TEST(ReduceJSStoreContext1) {
ContextSpecializationTester t(Nothing<OuterContext>());
Node* start = t.graph()->NewNode(t.common()->Start(0));
t.graph()->SetStart(start);
Node* undefined = t.jsgraph()->Constant(t.factory()->undefined_value());
const i::compiler::Operator* create_function_context =
t.javascript()->CreateFunctionContext(42, FUNCTION_SCOPE);
Node* context0 = t.graph()->NewNode(t.common()->Parameter(0), start);
Node* context1 = t.graph()->NewNode(create_function_context, undefined,
context0, start, start);
Node* context2 = t.graph()->NewNode(create_function_context, undefined,
context1, start, start);
{
Node* store =
t.graph()->NewNode(t.javascript()->StoreContext(0, slot_index),
context2, context2, start, start);
CHECK(!t.spec()->Reduce(store).Changed());
}
{
Node* store =
t.graph()->NewNode(t.javascript()->StoreContext(1, slot_index),
context2, context2, start, start);
t.CheckContextInputAndDepthChanges(store, context1, 0);
}
{
Node* store =
t.graph()->NewNode(t.javascript()->StoreContext(2, slot_index),
context2, context2, start, start);
t.CheckContextInputAndDepthChanges(store, context0, 0);
}
{
Node* store =
t.graph()->NewNode(t.javascript()->StoreContext(3, slot_index),
context2, context2, start, start);
t.CheckContextInputAndDepthChanges(store, context0, 1);
}
}
TEST(ReduceJSStoreContext2) {
ContextSpecializationTester t(Nothing<OuterContext>());
Node* start = t.graph()->NewNode(t.common()->Start(0));
t.graph()->SetStart(start);
Node* undefined = t.jsgraph()->Constant(t.factory()->undefined_value());
const i::compiler::Operator* create_function_context =
t.javascript()->CreateFunctionContext(42, FUNCTION_SCOPE);
Handle<HeapObject> slot_value0 = t.factory()->InternalizeUtf8String("0");
Handle<HeapObject> slot_value1 = t.factory()->InternalizeUtf8String("1");
Handle<Context> context_object0 = t.factory()->NewNativeContext();
Handle<Context> context_object1 = t.factory()->NewNativeContext();
context_object1->set_previous(*context_object0);
context_object0->set(slot_index, *slot_value0);
context_object1->set(slot_index, *slot_value1);
Node* context0 = t.jsgraph()->Constant(context_object1);
Node* context1 = t.graph()->NewNode(create_function_context, undefined,
context0, start, start);
Node* context2 = t.graph()->NewNode(create_function_context, undefined,
context1, start, start);
{
Node* store =
t.graph()->NewNode(t.javascript()->StoreContext(0, slot_index),
context2, context2, start, start);
CHECK(!t.spec()->Reduce(store).Changed());
}
{
Node* store =
t.graph()->NewNode(t.javascript()->StoreContext(1, slot_index),
context2, context2, start, start);
t.CheckContextInputAndDepthChanges(store, context1, 0);
}
{
Node* store =
t.graph()->NewNode(t.javascript()->StoreContext(2, slot_index),
context2, context2, start, start);
t.CheckContextInputAndDepthChanges(store, context0, 0);
}
{
Node* store =
t.graph()->NewNode(t.javascript()->StoreContext(3, slot_index),
context2, context2, start, start);
t.CheckContextInputAndDepthChanges(store, context_object0, 0);
}
}
TEST(ReduceJSStoreContext3) {
HandleAndZoneScope handle_zone_scope;
auto factory = handle_zone_scope.main_isolate()->factory();
Handle<HeapObject> slot_value0 = factory->InternalizeUtf8String("0");
Handle<HeapObject> slot_value1 = factory->InternalizeUtf8String("1");
Handle<Context> context_object0 = factory->NewNativeContext();
Handle<Context> context_object1 = factory->NewNativeContext();
context_object1->set_previous(*context_object0);
context_object0->set(slot_index, *slot_value0);
context_object1->set(slot_index, *slot_value1);
ContextSpecializationTester t(Just(OuterContext(context_object1, 0)));
Node* start = t.graph()->NewNode(t.common()->Start(2));
t.graph()->SetStart(start);
Node* undefined = t.jsgraph()->Constant(t.factory()->undefined_value());
const i::compiler::Operator* create_function_context =
t.javascript()->CreateFunctionContext(42, FUNCTION_SCOPE);
Node* context0 = t.graph()->NewNode(t.common()->Parameter(0), start);
Node* context1 = t.graph()->NewNode(create_function_context, undefined,
context0, start, start);
Node* context2 = t.graph()->NewNode(create_function_context, undefined,
context1, start, start);
{
Node* store =
t.graph()->NewNode(t.javascript()->StoreContext(0, slot_index),
context2, context2, start, start);
CHECK(!t.spec()->Reduce(store).Changed());
}
{
Node* store =
t.graph()->NewNode(t.javascript()->StoreContext(1, slot_index),
context2, context2, start, start);
t.CheckContextInputAndDepthChanges(store, context1, 0);
}
{
Node* store =
t.graph()->NewNode(t.javascript()->StoreContext(2, slot_index),
context2, context2, start, start);
t.CheckContextInputAndDepthChanges(store, context_object1, 0);
}
{
Node* store =
t.graph()->NewNode(t.javascript()->StoreContext(3, slot_index),
context2, context2, start, start);
t.CheckContextInputAndDepthChanges(store, context_object0, 0);
}
}
TEST(SpecializeJSFunction_ToConstant1) {
FunctionTester T(
"(function() { var x = 1; function inc(a)"
" { return a + x; } return inc; })()");
T.CheckCall(1.0, 0.0, 0.0);
T.CheckCall(2.0, 1.0, 0.0);
T.CheckCall(2.1, 1.1, 0.0);
}
TEST(SpecializeJSFunction_ToConstant2) {
FunctionTester T(
"(function() { var x = 1.5; var y = 2.25; var z = 3.75;"
" function f(a) { return a - x + y - z; } return f; })()");
T.CheckCall(-3.0, 0.0, 0.0);
T.CheckCall(-2.0, 1.0, 0.0);
T.CheckCall(-1.9, 1.1, 0.0);
}
TEST(SpecializeJSFunction_ToConstant3) {
FunctionTester T(
"(function() { var x = -11.5; function inc()"
" { return (function(a) { return a + x; }); }"
" return inc(); })()");
T.CheckCall(-11.5, 0.0, 0.0);
T.CheckCall(-10.5, 1.0, 0.0);
T.CheckCall(-10.4, 1.1, 0.0);
}
TEST(SpecializeJSFunction_ToConstant_uninit) {
{
FunctionTester T(
"(function() { if (false) { var x = 1; } function inc(a)"
" { return x; } return inc; })()"); // x is undefined!
i::Isolate* isolate = CcTest::i_isolate();
CHECK(
T.Call(T.Val(0.0), T.Val(0.0)).ToHandleChecked()->IsUndefined(isolate));
CHECK(
T.Call(T.Val(2.0), T.Val(0.0)).ToHandleChecked()->IsUndefined(isolate));
CHECK(T.Call(T.Val(-2.1), T.Val(0.0))
.ToHandleChecked()
->IsUndefined(isolate));
}
{
FunctionTester T(
"(function() { if (false) { var x = 1; } function inc(a)"
" { return a + x; } return inc; })()"); // x is undefined!
CHECK(T.Call(T.Val(0.0), T.Val(0.0)).ToHandleChecked()->IsNaN());
CHECK(T.Call(T.Val(2.0), T.Val(0.0)).ToHandleChecked()->IsNaN());
CHECK(T.Call(T.Val(-2.1), T.Val(0.0)).ToHandleChecked()->IsNaN());
}
}
} // namespace compiler
} // namespace internal
} // namespace v8