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Unified Diff: src/compiler/typer.cc

Issue 1209513002: [turbofan] Make TyperCache global and thread safe. (Closed) Base URL: https://chromium.googlesource.com/v8/v8.git@master
Patch Set: Created 5 years, 6 months ago
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Index: src/compiler/typer.cc
diff --git a/src/compiler/typer.cc b/src/compiler/typer.cc
index 56a440c8d99f2509d322ab2c50c8f7ca79c900db..69d95fb72b582a9671efdc8a341304fae76cd22b 100644
--- a/src/compiler/typer.cc
+++ b/src/compiler/typer.cc
@@ -2,177 +2,120 @@
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
+#include "src/compiler/typer.h"
+
#include "src/base/flags.h"
+#include "src/base/lazy-instance.h"
#include "src/bootstrapper.h"
#include "src/compiler/graph-reducer.h"
#include "src/compiler/js-operator.h"
#include "src/compiler/node.h"
#include "src/compiler/node-properties.h"
#include "src/compiler/simplified-operator.h"
-#include "src/compiler/typer.h"
namespace v8 {
namespace internal {
namespace compiler {
-#define NATIVE_TYPES(V) \
- V(Int8) \
- V(Uint8) \
- V(Int16) \
- V(Uint16) \
- V(Int32) \
- V(Uint32) \
- V(Float32) \
- V(Float64)
-
-enum LazyCachedType {
- kInteger,
- kWeakint,
- kWeakintFunc1,
- kRandomFunc0,
- kAnyFunc0,
- kAnyFunc1,
- kAnyFunc2,
- kAnyFunc3,
- kNumberFunc0,
- kNumberFunc1,
- kNumberFunc2,
- kImulFunc,
- kClz32Func,
- kArrayBufferFunc,
-#define TYPED_ARRAY_CASE(Type, type, TYPE, ctype, size) \
- k##Type, k##Type##Array, k##Type##ArrayFunc,
- TYPED_ARRAYS(TYPED_ARRAY_CASE)
-#undef TYPED_ARRAY_CASE
- kNumLazyCachedTypes
-};
-
+class TyperCache final {
+ private:
+ // This has to be first for the initialization magic to work.
+ Zone zone_;
-// Constructs and caches types lazily.
-// TODO(turbofan): these types could be globally cached or cached per isolate.
-class LazyTypeCache final : public ZoneObject {
public:
- explicit LazyTypeCache(Isolate* isolate, Zone* zone)
- : isolate_(isolate), zone_(zone) {
- memset(cache_, 0, sizeof(cache_));
- }
-
- V8_INLINE Type* Get(LazyCachedType type) {
- int const index = static_cast<int>(type);
- DCHECK_LT(index, kNumLazyCachedTypes);
- if (cache_[index] == NULL) cache_[index] = Create(type);
- return cache_[index];
- }
+ TyperCache() = default;
+
+ Type* const kInt8 =
+ CreateNative(CreateRange<int8_t>(), Type::UntaggedSigned8());
+ Type* const kUint8 =
+ CreateNative(CreateRange<uint8_t>(), Type::UntaggedUnsigned8());
+ Type* const kUint8Clamped = kUint8;
+ Type* const kInt16 =
+ CreateNative(CreateRange<int16_t>(), Type::UntaggedSigned16());
+ Type* const kUint16 =
+ CreateNative(CreateRange<uint16_t>(), Type::UntaggedUnsigned16());
+ Type* const kInt32 = CreateNative(Type::Signed32(), Type::UntaggedSigned32());
+ Type* const kUint32 =
+ CreateNative(Type::Unsigned32(), Type::UntaggedUnsigned32());
+ Type* const kFloat32 = CreateNative(Type::Number(), Type::UntaggedFloat32());
+ Type* const kFloat64 = CreateNative(Type::Number(), Type::UntaggedFloat64());
+
+ Type* const kSingletonZero = CreateRange(0.0, 0.0);
+ Type* const kSingletonOne = CreateRange(1.0, 1.0);
+ Type* const kZeroOrOne = CreateRange(0.0, 1.0);
+ Type* const kZeroish =
+ Type::Union(kSingletonZero, Type::MinusZeroOrNaN(), zone());
+ Type* const kInteger = CreateRange(-V8_INFINITY, V8_INFINITY);
+ Type* const kWeakint = Type::Union(kInteger, Type::MinusZeroOrNaN(), zone());
+ Type* const kWeakintFunc1 = Type::Function(kWeakint, Type::Number(), zone());
+
+ Type* const kRandomFunc0 = Type::Function(Type::OrderedNumber(), zone());
+ Type* const kAnyFunc0 = Type::Function(Type::Any(), zone());
+ Type* const kAnyFunc1 = Type::Function(Type::Any(), Type::Any(), zone());
+ Type* const kAnyFunc2 =
+ Type::Function(Type::Any(), Type::Any(), Type::Any(), zone());
+ Type* const kAnyFunc3 = Type::Function(Type::Any(), Type::Any(), Type::Any(),
+ Type::Any(), zone());
+ Type* const kNumberFunc0 = Type::Function(Type::Number(), zone());
+ Type* const kNumberFunc1 =
+ Type::Function(Type::Number(), Type::Number(), zone());
+ Type* const kNumberFunc2 =
+ Type::Function(Type::Number(), Type::Number(), Type::Number(), zone());
+ Type* const kImulFunc = Type::Function(Type::Signed32(), Type::Integral32(),
+ Type::Integral32(), zone());
+ Type* const kClz32Func =
+ Type::Function(CreateRange(0, 32), Type::Number(), zone());
+ Type* const kArrayBufferFunc =
+ Type::Function(Type::Object(zone()), Type::Unsigned32(), zone());
+
+#define TYPED_ARRAY(TypeName, type_name, TYPE_NAME, ctype, size) \
+ Type* const k##TypeName##Array = CreateArray(k##TypeName); \
+ Type* const k##TypeName##ArrayFunc = CreateArrayFunction(k##TypeName##Array);
+ TYPED_ARRAYS(TYPED_ARRAY)
+#undef TYPED_ARRAY
private:
- Type* Create(LazyCachedType type) {
- switch (type) {
- case kInt8:
- return CreateNative(CreateRange<int8_t>(), Type::UntaggedSigned8());
- case kUint8:
- return CreateNative(CreateRange<uint8_t>(), Type::UntaggedUnsigned8());
- case kInt16:
- return CreateNative(CreateRange<int16_t>(), Type::UntaggedSigned16());
- case kUint16:
- return CreateNative(CreateRange<uint16_t>(),
- Type::UntaggedUnsigned16());
- case kInt32:
- return CreateNative(Type::Signed32(), Type::UntaggedSigned32());
- case kUint32:
- return CreateNative(Type::Unsigned32(), Type::UntaggedUnsigned32());
- case kFloat32:
- return CreateNative(Type::Number(), Type::UntaggedFloat32());
- case kFloat64:
- return CreateNative(Type::Number(), Type::UntaggedFloat64());
- case kUint8Clamped:
- return Get(kUint8);
- case kInteger:
- return CreateRange(-V8_INFINITY, V8_INFINITY);
- case kWeakint:
- return Type::Union(Get(kInteger), Type::MinusZeroOrNaN(), zone());
- case kWeakintFunc1:
- return Type::Function(Get(kWeakint), Type::Number(), zone());
- case kRandomFunc0:
- return Type::Function(Type::OrderedNumber(), zone());
- case kAnyFunc0:
- return Type::Function(Type::Any(), zone());
- case kAnyFunc1:
- return Type::Function(Type::Any(), Type::Any(), zone());
- case kAnyFunc2:
- return Type::Function(Type::Any(), Type::Any(), Type::Any(), zone());
- case kAnyFunc3:
- return Type::Function(Type::Any(), Type::Any(), Type::Any(),
- Type::Any(), zone());
- case kNumberFunc0:
- return Type::Function(Type::Number(), zone());
- case kNumberFunc1:
- return Type::Function(Type::Number(), Type::Number(), zone());
- case kNumberFunc2:
- return Type::Function(Type::Number(), Type::Number(), Type::Number(),
- zone());
- case kImulFunc:
- return Type::Function(Type::Signed32(), Type::Integral32(),
- Type::Integral32(), zone());
- case kClz32Func:
- return Type::Function(CreateRange(0, 32), Type::Number(), zone());
- case kArrayBufferFunc:
- return Type::Function(Type::Object(zone()), Type::Unsigned32(), zone());
-#define TYPED_ARRAY_CASE(Type, type, TYPE, ctype, size) \
- case k##Type##Array: \
- return CreateArray(Get(k##Type)); \
- case k##Type##ArrayFunc: \
- return CreateArrayFunction(Get(k##Type##Array));
- TYPED_ARRAYS(TYPED_ARRAY_CASE)
-#undef TYPED_ARRAY_CASE
- case kNumLazyCachedTypes:
- break;
- }
- UNREACHABLE();
- return NULL;
- }
+ Type* CreateArray(Type* element) { return Type::Array(element, zone()); }
- Type* CreateArray(Type* element) const {
- return Type::Array(element, zone());
- }
-
- Type* CreateArrayFunction(Type* array) const {
+ Type* CreateArrayFunction(Type* array) {
Type* arg1 = Type::Union(Type::Unsigned32(), Type::Object(), zone());
Type* arg2 = Type::Union(Type::Unsigned32(), Type::Undefined(), zone());
Type* arg3 = arg2;
return Type::Function(array, arg1, arg2, arg3, zone());
}
- Type* CreateNative(Type* semantic, Type* representation) const {
+ Type* CreateNative(Type* semantic, Type* representation) {
return Type::Intersect(semantic, representation, zone());
}
template <typename T>
- Type* CreateRange() const {
+ Type* CreateRange() {
return CreateRange(std::numeric_limits<T>::min(),
std::numeric_limits<T>::max());
}
- Type* CreateRange(double min, double max) const {
+ Type* CreateRange(double min, double max) {
return Type::Range(min, max, zone());
}
- Factory* factory() const { return isolate()->factory(); }
- Isolate* isolate() const { return isolate_; }
- Zone* zone() const { return zone_; }
-
- Type* cache_[kNumLazyCachedTypes];
- Isolate* isolate_;
- Zone* zone_;
+ Zone* zone() { return &zone_; }
};
+namespace {
+
+base::LazyInstance<TyperCache>::type kCache = LAZY_INSTANCE_INITIALIZER;
+
+} // namespace
+
+
class Typer::Decorator final : public GraphDecorator {
public:
explicit Decorator(Typer* typer) : typer_(typer) {}
void Decorate(Node* node) final;
private:
- Typer* typer_;
+ Typer* const typer_;
};
@@ -182,8 +125,8 @@ Typer::Typer(Isolate* isolate, Graph* graph, Type::FunctionType* function_type,
graph_(graph),
function_type_(function_type),
context_(context),
- decorator_(NULL),
- cache_(new (graph->zone()) LazyTypeCache(isolate, graph->zone())) {
+ decorator_(nullptr),
+ cache_(kCache.Get()) {
Zone* zone = this->zone();
Factory* const factory = isolate->factory();
@@ -195,17 +138,13 @@ Typer::Typer(Isolate* isolate, Graph* graph, Type::FunctionType* function_type,
singleton_false_ = Type::Constant(factory->false_value(), zone);
singleton_true_ = Type::Constant(factory->true_value(), zone);
- singleton_zero_ = Type::Range(0.0, 0.0, zone);
- singleton_one_ = Type::Range(1.0, 1.0, zone);
- zero_or_one_ = Type::Range(0.0, 1.0, zone);
- zeroish_ = Type::Union(singleton_zero_, Type::MinusZeroOrNaN(), zone);
signed32ish_ = Type::Union(Type::Signed32(), truncating_to_zero, zone);
unsigned32ish_ = Type::Union(Type::Unsigned32(), truncating_to_zero, zone);
- falsish_ =
- Type::Union(Type::Undetectable(),
- Type::Union(Type::Union(singleton_false_, zeroish_, zone),
- Type::NullOrUndefined(), zone),
- zone);
+ falsish_ = Type::Union(
+ Type::Undetectable(),
+ Type::Union(Type::Union(singleton_false_, cache_.kZeroish, zone),
+ Type::NullOrUndefined(), zone),
+ zone);
truish_ = Type::Union(
singleton_true_,
Type::Union(Type::DetectableReceiver(), Type::Symbol(), zone), zone);
@@ -527,7 +466,7 @@ Type* Typer::Visitor::FalsifyUndefined(ComparisonOutcome outcome, Typer* t) {
Type* Typer::Visitor::Rangify(Type* type, Typer* t) {
if (type->IsRange()) return type; // Shortcut.
- if (!type->Is(t->cache_->Get(kInteger))) {
+ if (!type->Is(t->cache_.kInteger)) {
return type; // Give up on non-integer types.
}
double min = type->Min();
@@ -567,20 +506,20 @@ Type* Typer::Visitor::ToBoolean(Type* type, Typer* t) {
Type* Typer::Visitor::ToNumber(Type* type, Typer* t) {
if (type->Is(Type::Number())) return type;
if (type->Is(Type::NullOrUndefined())) {
- if (type->Is(Type::Null())) return t->singleton_zero_;
+ if (type->Is(Type::Null())) return t->cache_.kSingletonZero;
if (type->Is(Type::Undefined())) return Type::NaN();
- return Type::Union(Type::NaN(), t->singleton_zero_, t->zone());
+ return Type::Union(Type::NaN(), t->cache_.kSingletonZero, t->zone());
}
if (type->Is(Type::NumberOrUndefined())) {
return Type::Union(Type::Intersect(type, Type::Number(), t->zone()),
Type::NaN(), t->zone());
}
- if (type->Is(t->singleton_false_)) return t->singleton_zero_;
- if (type->Is(t->singleton_true_)) return t->singleton_one_;
- if (type->Is(Type::Boolean())) return t->zero_or_one_;
+ if (type->Is(t->singleton_false_)) return t->cache_.kSingletonZero;
+ if (type->Is(t->singleton_true_)) return t->cache_.kSingletonOne;
+ if (type->Is(Type::Boolean())) return t->cache_.kZeroOrOne;
if (type->Is(Type::BooleanOrNumber())) {
return Type::Union(Type::Intersect(type, Type::Number(), t->zone()),
- t->zero_or_one_, t->zone());
+ t->cache_.kZeroOrOne, t->zone());
}
return Type::Number();
}
@@ -595,10 +534,11 @@ Type* Typer::Visitor::ToString(Type* type, Typer* t) {
Type* Typer::Visitor::NumberToInt32(Type* type, Typer* t) {
// TODO(neis): DCHECK(type->Is(Type::Number()));
if (type->Is(Type::Signed32())) return type;
- if (type->Is(t->zeroish_)) return t->singleton_zero_;
+ if (type->Is(t->cache_.kZeroish)) return t->cache_.kSingletonZero;
if (type->Is(t->signed32ish_)) {
- return Type::Intersect(Type::Union(type, t->singleton_zero_, t->zone()),
- Type::Signed32(), t->zone());
+ return Type::Intersect(
+ Type::Union(type, t->cache_.kSingletonZero, t->zone()),
+ Type::Signed32(), t->zone());
}
return Type::Signed32();
}
@@ -607,10 +547,11 @@ Type* Typer::Visitor::NumberToInt32(Type* type, Typer* t) {
Type* Typer::Visitor::NumberToUint32(Type* type, Typer* t) {
// TODO(neis): DCHECK(type->Is(Type::Number()));
if (type->Is(Type::Unsigned32())) return type;
- if (type->Is(t->zeroish_)) return t->singleton_zero_;
+ if (type->Is(t->cache_.kZeroish)) return t->cache_.kSingletonZero;
if (type->Is(t->unsigned32ish_)) {
- return Type::Intersect(Type::Union(type, t->singleton_zero_, t->zone()),
- Type::Unsigned32(), t->zone());
+ return Type::Intersect(
+ Type::Union(type, t->cache_.kSingletonZero, t->zone()),
+ Type::Unsigned32(), t->zone());
}
return Type::Unsigned32();
}
@@ -1165,13 +1106,13 @@ Type* Typer::Visitor::JSMultiplyRanger(Type::RangeType* lhs,
// the discontinuity makes it too complicated. Note that even if none of the
// "results" above is nan, the actual result may still be, so we have to do a
// different check:
- bool maybe_nan = (lhs->Maybe(t->singleton_zero_) &&
+ bool maybe_nan = (lhs->Maybe(t->cache_.kSingletonZero) &&
(rmin == -V8_INFINITY || rmax == +V8_INFINITY)) ||
- (rhs->Maybe(t->singleton_zero_) &&
+ (rhs->Maybe(t->cache_.kSingletonZero) &&
(lmin == -V8_INFINITY || lmax == +V8_INFINITY));
- if (maybe_nan) return t->cache_->Get(kWeakint); // Giving up.
- bool maybe_minuszero = (lhs->Maybe(t->singleton_zero_) && rmin < 0) ||
- (rhs->Maybe(t->singleton_zero_) && lmin < 0);
+ if (maybe_nan) return t->cache_.kWeakint; // Giving up.
+ bool maybe_minuszero = (lhs->Maybe(t->cache_.kSingletonZero) && rmin < 0) ||
+ (rhs->Maybe(t->cache_.kSingletonZero) && lmin < 0);
Type* range =
Type::Range(array_min(results, 4), array_max(results, 4), t->zone());
return maybe_minuszero ? Type::Union(range, Type::MinusZero(), t->zone())
@@ -1197,7 +1138,7 @@ Type* Typer::Visitor::JSDivideTyper(Type* lhs, Type* rhs, Typer* t) {
// Division is tricky, so all we do is try ruling out nan.
// TODO(neis): try ruling out -0 as well?
bool maybe_nan =
- lhs->Maybe(Type::NaN()) || rhs->Maybe(t->zeroish_) ||
+ lhs->Maybe(Type::NaN()) || rhs->Maybe(t->cache_.kZeroish) ||
((lhs->Min() == -V8_INFINITY || lhs->Max() == +V8_INFINITY) &&
(rhs->Min() == -V8_INFINITY || rhs->Max() == +V8_INFINITY));
return maybe_nan ? Type::Number() : Type::OrderedNumber();
@@ -1242,7 +1183,7 @@ Type* Typer::Visitor::JSModulusTyper(Type* lhs, Type* rhs, Typer* t) {
rhs = ToNumber(rhs, t);
if (lhs->Is(Type::NaN()) || rhs->Is(Type::NaN())) return Type::NaN();
- if (lhs->Maybe(Type::NaN()) || rhs->Maybe(t->zeroish_) ||
+ if (lhs->Maybe(Type::NaN()) || rhs->Maybe(t->cache_.kZeroish) ||
lhs->Min() == -V8_INFINITY || lhs->Max() == +V8_INFINITY) {
// Result maybe NaN.
return Type::Number();
@@ -1375,7 +1316,7 @@ Type* Typer::Visitor::Weaken(Node* node, Type* current_type,
STATIC_ASSERT(arraysize(kWeakenMinLimits) == arraysize(kWeakenMaxLimits));
// If the types have nothing to do with integers, return the types.
- Type* const integer = typer_->cache_->Get(kInteger);
+ Type* const integer = typer_->cache_.kInteger;
if (!previous_type->Maybe(integer)) {
return current_type;
}
@@ -1839,7 +1780,7 @@ Bounds Typer::Visitor::TypeLoadBuffer(Node* node) {
switch (BufferAccessOf(node->op()).external_array_type()) {
#define TYPED_ARRAY_CASE(Type, type, TYPE, ctype, size) \
case kExternal##Type##Array: \
- return Bounds(typer_->cache_->Get(k##Type));
+ return Bounds(typer_->cache_.k##Type);
TYPED_ARRAYS(TYPED_ARRAY_CASE)
#undef TYPED_ARRAY_CASE
}
@@ -2346,11 +2287,11 @@ Type* Typer::Visitor::TypeConstant(Handle<Object> value) {
if (JSFunction::cast(*value)->shared()->HasBuiltinFunctionId()) {
switch (JSFunction::cast(*value)->shared()->builtin_function_id()) {
case kMathRandom:
- return typer_->cache_->Get(kRandomFunc0);
+ return typer_->cache_.kRandomFunc0;
case kMathFloor:
case kMathRound:
case kMathCeil:
- return typer_->cache_->Get(kWeakintFunc1);
+ return typer_->cache_.kWeakintFunc1;
// Unary math functions.
case kMathAbs: // TODO(rossberg): can't express overloading
case kMathLog:
@@ -2363,17 +2304,17 @@ Type* Typer::Visitor::TypeConstant(Handle<Object> value) {
case kMathAsin:
case kMathAtan:
case kMathFround:
- return typer_->cache_->Get(kNumberFunc1);
+ return typer_->cache_.kNumberFunc1;
// Binary math functions.
case kMathAtan2:
case kMathPow:
case kMathMax:
case kMathMin:
- return typer_->cache_->Get(kNumberFunc2);
+ return typer_->cache_.kNumberFunc2;
case kMathImul:
- return typer_->cache_->Get(kImulFunc);
+ return typer_->cache_.kImulFunc;
case kMathClz32:
- return typer_->cache_->Get(kClz32Func);
+ return typer_->cache_.kClz32Func;
default:
break;
}
@@ -2381,23 +2322,23 @@ Type* Typer::Visitor::TypeConstant(Handle<Object> value) {
Handle<Context> native =
handle(context().ToHandleChecked()->native_context(), isolate());
if (*value == native->array_buffer_fun()) {
- return typer_->cache_->Get(kArrayBufferFunc);
+ return typer_->cache_.kArrayBufferFunc;
} else if (*value == native->int8_array_fun()) {
- return typer_->cache_->Get(kInt8ArrayFunc);
+ return typer_->cache_.kInt8ArrayFunc;
} else if (*value == native->int16_array_fun()) {
- return typer_->cache_->Get(kInt16ArrayFunc);
+ return typer_->cache_.kInt16ArrayFunc;
} else if (*value == native->int32_array_fun()) {
- return typer_->cache_->Get(kInt32ArrayFunc);
+ return typer_->cache_.kInt32ArrayFunc;
} else if (*value == native->uint8_array_fun()) {
- return typer_->cache_->Get(kUint8ArrayFunc);
+ return typer_->cache_.kUint8ArrayFunc;
} else if (*value == native->uint16_array_fun()) {
- return typer_->cache_->Get(kUint16ArrayFunc);
+ return typer_->cache_.kUint16ArrayFunc;
} else if (*value == native->uint32_array_fun()) {
- return typer_->cache_->Get(kUint32ArrayFunc);
+ return typer_->cache_.kUint32ArrayFunc;
} else if (*value == native->float32_array_fun()) {
- return typer_->cache_->Get(kFloat32ArrayFunc);
+ return typer_->cache_.kFloat32ArrayFunc;
} else if (*value == native->float64_array_fun()) {
- return typer_->cache_->Get(kFloat64ArrayFunc);
+ return typer_->cache_.kFloat64ArrayFunc;
}
}
int const arity =
@@ -2407,13 +2348,13 @@ Type* Typer::Visitor::TypeConstant(Handle<Object> value) {
// Some smart optimization at work... &%$!&@+$!
return Type::Any(zone());
case 0:
- return typer_->cache_->Get(kAnyFunc0);
+ return typer_->cache_.kAnyFunc0;
case 1:
- return typer_->cache_->Get(kAnyFunc1);
+ return typer_->cache_.kAnyFunc1;
case 2:
- return typer_->cache_->Get(kAnyFunc2);
+ return typer_->cache_.kAnyFunc2;
case 3:
- return typer_->cache_->Get(kAnyFunc3);
+ return typer_->cache_.kAnyFunc3;
default: {
DCHECK_LT(3, arity);
Type** const params = zone()->NewArray<Type*>(arity);
@@ -2425,7 +2366,7 @@ Type* Typer::Visitor::TypeConstant(Handle<Object> value) {
switch (JSTypedArray::cast(*value)->type()) {
#define TYPED_ARRAY_CASE(Type, type, TYPE, ctype, size) \
case kExternal##Type##Array: \
- return typer_->cache_->Get(k##Type##Array);
+ return typer_->cache_.k##Type##Array;
TYPED_ARRAYS(TYPED_ARRAY_CASE)
#undef TYPED_ARRAY_CASE
}
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