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01e079eff17f4e6a52182b34b07e230aa1bd0214
sdk/runtime/vm/compiler/method_recognizer.cc
T
Samir Jindel 445ae73b32 [vm/tfa] Use pragma to pass type arguments to exact return types. 
Change-Id: Ie2a1de07653c53e8b9506c54a0a66a5fe6503b9a
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/129160
Commit-Queue: Samir Jindel <sjindel@google.com>
Reviewed-by: Alexander Markov <alexmarkov@google.com>
2020-01-03 14:08:19 +00:00

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// Copyright (c) 2014, the Dart project authors. Please see the AUTHORS file
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.
#include "vm/compiler/method_recognizer.h"
#include "vm/object.h"
#include "vm/reusable_handles.h"
#include "vm/symbols.h"
namespace dart {
intptr_t MethodRecognizer::NumArgsCheckedForStaticCall(
const Function& function) {
switch (function.recognized_kind()) {
case MethodRecognizer::kDoubleFromInteger:
case MethodRecognizer::kMathMin:
case MethodRecognizer::kMathMax:
return 2;
default:
return 0;
}
}
intptr_t MethodRecognizer::ResultCidFromPragma(
const Object& function_or_field) {
auto T = Thread::Current();
auto Z = T->zone();
auto& option = Object::Handle(Z);
if (Library::FindPragma(T, /*only_core=*/true, function_or_field,
Symbols::vm_exact_result_type(), &option)) {
if (option.IsType()) {
return Type::Cast(option).type_class_id();
} else if (option.IsString()) {
auto& str = String::Cast(option);
// 'str' should match the pattern '([^#]+)#([^#\?]+)' where group 1
// is the library URI and group 2 is the class name.
bool parse_failure = false;
intptr_t library_end = -1;
for (intptr_t i = 0; i < str.Length(); ++i) {
if (str.CharAt(i) == '#') {
if (library_end != -1) {
parse_failure = true;
break;
} else {
library_end = i;
}
}
}
if (!parse_failure && library_end > 0) {
auto& tmp =
String::Handle(String::SubString(str, 0, library_end, Heap::kOld));
const auto& library = Library::Handle(Library::LookupLibrary(T, tmp));
if (!library.IsNull()) {
tmp = String::SubString(str, library_end + 1,
str.Length() - library_end - 1, Heap::kOld);
const auto& klass =
Class::Handle(library.LookupClassAllowPrivate(tmp));
if (!klass.IsNull()) {
return klass.id();
}
}
}
} else if (option.IsArray()) {
const Array& array = Array::Cast(option);
if (array.Length() > 0) {
const Object& type = Object::Handle(Array::Cast(option).At(0));
if (type.IsType()) {
return Type::Cast(type).type_class_id();
}
}
}
}
return kDynamicCid;
}
bool MethodRecognizer::HasNonNullableResultTypeFromPragma(
const Object& function_or_field) {
auto T = Thread::Current();
auto Z = T->zone();
auto& option = Object::Handle(Z);
if (Library::FindPragma(T, /*only_core=*/true, function_or_field,
Symbols::vm_non_nullable_result_type(), &option)) {
return true;
}
// If nothing said otherwise, the return type is nullable.
return false;
}
intptr_t MethodRecognizer::MethodKindToReceiverCid(Kind kind) {
switch (kind) {
case kImmutableArrayGetIndexed:
return kImmutableArrayCid;
case kObjectArrayGetIndexed:
case kObjectArraySetIndexed:
case kObjectArraySetIndexedUnchecked:
return kArrayCid;
case kGrowableArrayGetIndexed:
case kGrowableArraySetIndexed:
case kGrowableArraySetIndexedUnchecked:
return kGrowableObjectArrayCid;
case kFloat32ArrayGetIndexed:
case kFloat32ArraySetIndexed:
return kTypedDataFloat32ArrayCid;
case kFloat64ArrayGetIndexed:
case kFloat64ArraySetIndexed:
return kTypedDataFloat64ArrayCid;
case kInt8ArrayGetIndexed:
case kInt8ArraySetIndexed:
return kTypedDataInt8ArrayCid;
case kUint8ArrayGetIndexed:
case kUint8ArraySetIndexed:
return kTypedDataUint8ArrayCid;
case kUint8ClampedArrayGetIndexed:
case kUint8ClampedArraySetIndexed:
return kTypedDataUint8ClampedArrayCid;
case kExternalUint8ArrayGetIndexed:
case kExternalUint8ArraySetIndexed:
return kExternalTypedDataUint8ArrayCid;
case kExternalUint8ClampedArrayGetIndexed:
case kExternalUint8ClampedArraySetIndexed:
return kExternalTypedDataUint8ClampedArrayCid;
case kInt16ArrayGetIndexed:
case kInt16ArraySetIndexed:
return kTypedDataInt16ArrayCid;
case kUint16ArrayGetIndexed:
case kUint16ArraySetIndexed:
return kTypedDataUint16ArrayCid;
case kInt32ArrayGetIndexed:
case kInt32ArraySetIndexed:
return kTypedDataInt32ArrayCid;
case kUint32ArrayGetIndexed:
case kUint32ArraySetIndexed:
return kTypedDataUint32ArrayCid;
case kInt64ArrayGetIndexed:
case kInt64ArraySetIndexed:
return kTypedDataInt64ArrayCid;
case kUint64ArrayGetIndexed:
case kUint64ArraySetIndexed:
return kTypedDataUint64ArrayCid;
case kFloat32x4ArrayGetIndexed:
case kFloat32x4ArraySetIndexed:
return kTypedDataFloat32x4ArrayCid;
case kInt32x4ArrayGetIndexed:
case kInt32x4ArraySetIndexed:
return kTypedDataInt32x4ArrayCid;
case kFloat64x2ArrayGetIndexed:
case kFloat64x2ArraySetIndexed:
return kTypedDataFloat64x2ArrayCid;
default:
break;
}
UNREACHABLE();
return kIllegalCid;
}
static const struct {
const char* const class_name;
const char* const function_name;
const char* const enum_name;
const uint32_t fp;
} recognized_methods[MethodRecognizer::kNumRecognizedMethods] = {
{"", "", "Unknown", 0},
#define RECOGNIZE_METHOD(class_name, function_name, enum_name, fp) \
{"" #class_name, "" #function_name, #enum_name, fp},
RECOGNIZED_LIST(RECOGNIZE_METHOD)
#undef RECOGNIZE_METHOD
};
const char* MethodRecognizer::KindToCString(Kind kind) {
if (kind >= kUnknown && kind < kNumRecognizedMethods)
return recognized_methods[kind].enum_name;
return "?";
}
#if !defined(DART_PRECOMPILED_RUNTIME)
void MethodRecognizer::InitializeState() {
GrowableArray<Library*> libs(3);
Libraries(&libs);
Function& func = Function::Handle();
for (intptr_t i = 1; i < MethodRecognizer::kNumRecognizedMethods; i++) {
const MethodRecognizer::Kind kind = static_cast<MethodRecognizer::Kind>(i);
func = Library::GetFunction(libs, recognized_methods[i].class_name,
recognized_methods[i].function_name);
if (!func.IsNull()) {
CHECK_FINGERPRINT3(func, recognized_methods[i].class_name,
recognized_methods[i].function_name,
recognized_methods[i].enum_name,
recognized_methods[i].fp);
func.set_recognized_kind(kind);
} else if (!FLAG_precompiled_mode) {
FATAL2("Missing %s::%s\n", recognized_methods[i].class_name,
recognized_methods[i].function_name);
}
}
#define SET_FUNCTION_BIT(class_name, function_name, dest, fp, setter, value) \
func = Library::GetFunction(libs, #class_name, #function_name); \
if (!func.IsNull()) { \
CHECK_FINGERPRINT3(func, class_name, function_name, dest, fp); \
func.setter(value); \
} else if (!FLAG_precompiled_mode) { \
OS::PrintErr("Missing %s::%s\n", #class_name, #function_name); \
UNREACHABLE(); \
}
#define SET_IS_POLYMORPHIC_TARGET(class_name, function_name, dest, fp) \
SET_FUNCTION_BIT(class_name, function_name, dest, fp, \
set_is_polymorphic_target, true)
POLYMORPHIC_TARGET_LIST(SET_IS_POLYMORPHIC_TARGET);
#undef SET_RECOGNIZED_KIND
#undef SET_IS_POLYMORPHIC_TARGET
#undef SET_FUNCTION_BIT
}
void MethodRecognizer::Libraries(GrowableArray<Library*>* libs) {
libs->Add(&Library::ZoneHandle(Library::CoreLibrary()));
libs->Add(&Library::ZoneHandle(Library::CollectionLibrary()));
libs->Add(&Library::ZoneHandle(Library::MathLibrary()));
libs->Add(&Library::ZoneHandle(Library::TypedDataLibrary()));
libs->Add(&Library::ZoneHandle(Library::InternalLibrary()));
libs->Add(&Library::ZoneHandle(Library::DeveloperLibrary()));
libs->Add(&Library::ZoneHandle(Library::AsyncLibrary()));
libs->Add(&Library::ZoneHandle(Library::FfiLibrary()));
}
#endif // !defined(DART_PRECOMPILED_RUNTIME)
Token::Kind MethodTokenRecognizer::RecognizeTokenKind(const String& name_) {
Thread* thread = Thread::Current();
REUSABLE_STRING_HANDLESCOPE(thread);
String& name = thread->StringHandle();
name = name_.raw();
ASSERT(name.IsSymbol());
if (Function::IsDynamicInvocationForwarderName(name)) {
name = Function::DemangleDynamicInvocationForwarderName(name);
}
if (name.raw() == Symbols::Plus().raw()) {
return Token::kADD;
} else if (name.raw() == Symbols::Minus().raw()) {
return Token::kSUB;
} else if (name.raw() == Symbols::Star().raw()) {
return Token::kMUL;
} else if (name.raw() == Symbols::Slash().raw()) {
return Token::kDIV;
} else if (name.raw() == Symbols::TruncDivOperator().raw()) {
return Token::kTRUNCDIV;
} else if (name.raw() == Symbols::Percent().raw()) {
return Token::kMOD;
} else if (name.raw() == Symbols::BitOr().raw()) {
return Token::kBIT_OR;
} else if (name.raw() == Symbols::Ampersand().raw()) {
return Token::kBIT_AND;
} else if (name.raw() == Symbols::Caret().raw()) {
return Token::kBIT_XOR;
} else if (name.raw() == Symbols::LeftShiftOperator().raw()) {
return Token::kSHL;
} else if (name.raw() == Symbols::RightShiftOperator().raw()) {
return Token::kSHR;
} else if (name.raw() == Symbols::Tilde().raw()) {
return Token::kBIT_NOT;
} else if (name.raw() == Symbols::UnaryMinus().raw()) {
return Token::kNEGATE;
} else if (name.raw() == Symbols::EqualOperator().raw()) {
return Token::kEQ;
} else if (name.raw() == Symbols::Token(Token::kNE).raw()) {
return Token::kNE;
} else if (name.raw() == Symbols::LAngleBracket().raw()) {
return Token::kLT;
} else if (name.raw() == Symbols::RAngleBracket().raw()) {
return Token::kGT;
} else if (name.raw() == Symbols::LessEqualOperator().raw()) {
return Token::kLTE;
} else if (name.raw() == Symbols::GreaterEqualOperator().raw()) {
return Token::kGTE;
} else if (Field::IsGetterName(name)) {
return Token::kGET;
} else if (Field::IsSetterName(name)) {
return Token::kSET;
}
return Token::kILLEGAL;
}
#define RECOGNIZE_FACTORY(symbol, class_name, constructor_name, cid, fp) \
{Symbols::k##symbol##Id, cid, fp, #symbol ", " #cid}, // NOLINT
static struct {
const intptr_t symbol_id;
const intptr_t cid;
const uint32_t finger_print;
const char* const name;
} factory_recognizer_list[] = {RECOGNIZED_LIST_FACTORY_LIST(RECOGNIZE_FACTORY){
Symbols::kIllegal, -1, 0, NULL}};
#undef RECOGNIZE_FACTORY
intptr_t FactoryRecognizer::ResultCid(const Function& factory) {
ASSERT(factory.IsFactory());
const Class& function_class = Class::Handle(factory.Owner());
const Library& lib = Library::Handle(function_class.library());
ASSERT((lib.raw() == Library::CoreLibrary()) ||
(lib.raw() == Library::TypedDataLibrary()));
const String& factory_name = String::Handle(factory.name());
for (intptr_t i = 0;
factory_recognizer_list[i].symbol_id != Symbols::kIllegal; i++) {
if (String::EqualsIgnoringPrivateKey(
factory_name,
Symbols::Symbol(factory_recognizer_list[i].symbol_id))) {
return factory_recognizer_list[i].cid;
}
}
return kDynamicCid;
}
intptr_t FactoryRecognizer::GetResultCidOfListFactory(Zone* zone,
const Function& function,
intptr_t argument_count) {
if (!function.IsFactory()) {
return kDynamicCid;
}
const Class& owner = Class::Handle(zone, function.Owner());
if ((owner.library() != Library::CoreLibrary()) &&
(owner.library() != Library::TypedDataLibrary())) {
return kDynamicCid;
}
if ((owner.Name() == Symbols::List().raw()) &&
(function.name() == Symbols::ListFactory().raw())) {
ASSERT(argument_count == 1 || argument_count == 2);
return (argument_count == 1) ? kGrowableObjectArrayCid : kArrayCid;
}
return ResultCid(function);
}
} // namespace dart
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