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[pkg/vm] Instantiate the ffi Pointer class to bounds when needed.
Previously, the FFI transformer could produce is checks where the type to check against was Pointer<dynamic>. However, given that the Pointer class is defined as: abstract class Pointer<X extends NativeType> ... the instantiated to bounds version of its type is Pointer<NativeType>. Pointer<dynamic> is not a subtype of Pointer<NativeType>, and thus is an invalid instantiation, but the only place this type could occur was as the right hand side of an is check. Before 7cc005e, Class::RareType() returned the class instantiated with the null (all-dynamic) type arguments vector. Among other things, this "rare" type was compared to the right-hand side of is checks and, if it matched, performed a simple (cid-only) check of the instance type arguments in unoptimized code. Afterwards, Class::RareType() returns the class instantiated with a type arguments vector where each type parameter is instantiated to bounds, so now the "rare" type check fails and it falls back to the full check of the instance type arguments, which causes a ~25% regression in some unoptimized benchmarks. This CL fixes the generation of those is checks in the FFI transformer to use the instantiated to bounds version of the Pointer type instead. TEST=pkg/front_end/test Issue: #52843 Issue: #52848 Cq-Include-Trybots: luci.dart.try:vm-ffi-qemu-linux-release-riscv64-try,vm-ffi-qemu-linux-release-arm-try,vm-aot-linux-debug-x64-try,vm-linux-debug-x64-try Change-Id: Ic9ac6d75ba2743e233065444fad13ab098094349 Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/312400 Reviewed-by: Daco Harkes <dacoharkes@google.com> Reviewed-by: Erik Ernst <eernst@google.com> Auto-Submit: Tess Strickland <sstrickl@google.com> Commit-Queue: Tess Strickland <sstrickl@google.com>
1 parent 6a4ef6c commit ac2533e

25 files changed

+46
-50
lines changed

‎pkg/front_end/testcases/incremental/crash_05.yaml.world.1.expect

Lines changed: 1 addition & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -39,7 +39,7 @@ library from "org-dartlang-test:///main.dart" as main {
3939
return new lib::Y::#fromTypedDataBase( block {
4040
synthesized dart.core::Object #typedDataBase = this.{dart.ffi::_Compound::_typedDataBase}{dart.core::Object};
4141
synthesized dart.core::int #offset = #C9.{dart.core::List::[]}(dart.ffi::_abi()){(dart.core::int) → dart.core::int*};
42-
} =>#typedDataBase is{ForLegacy} dart.ffi::Pointer<dynamic> ?{dart.core::Object} dart.ffi::_fromAddress<lib::Y>(#typedDataBase.{dart.ffi::Pointer::address}{dart.core::int}.{dart.core::num::+}(#offset){(dart.core::num) → dart.core::num}) : let synthesized dart.typed_data::TypedData #typedData = dart._internal::unsafeCast<dart.typed_data::TypedData>(#typedDataBase) in #typedData.{dart.typed_data::TypedData::buffer}{dart.typed_data::ByteBuffer}.{dart.typed_data::ByteBuffer::asUint8List}(#typedData.{dart.typed_data::TypedData::offsetInBytes}{dart.core::int}.{dart.core::num::+}(#offset){(dart.core::num) → dart.core::num}, #C13.{dart.core::List::[]}(dart.ffi::_abi()){(dart.core::int) → dart.core::int*}){([dart.core::int, dart.core::int?]) → dart.typed_data::Uint8List});
42+
} =>#typedDataBase is{ForLegacy} dart.ffi::Pointer<dart.ffi::NativeType> ?{dart.core::Object} dart.ffi::_fromAddress<lib::Y>(#typedDataBase.{dart.ffi::Pointer::address}{dart.core::int}.{dart.core::num::+}(#offset){(dart.core::num) → dart.core::num}) : let synthesized dart.typed_data::TypedData #typedData = dart._internal::unsafeCast<dart.typed_data::TypedData>(#typedDataBase) in #typedData.{dart.typed_data::TypedData::buffer}{dart.typed_data::ByteBuffer}.{dart.typed_data::ByteBuffer::asUint8List}(#typedData.{dart.typed_data::TypedData::offsetInBytes}{dart.core::int}.{dart.core::num::+}(#offset){(dart.core::num) → dart.core::num}, #C13.{dart.core::List::[]}(dart.ffi::_abi()){(dart.core::int) → dart.core::int*}){([dart.core::int, dart.core::int?]) → dart.typed_data::Uint8List});
4343
set xx(lib::Y #externalFieldValue) → void
4444
return dart.ffi::_memCopy(this.{dart.ffi::_Compound::_typedDataBase}{dart.core::Object}, #C9.{dart.core::List::[]}(dart.ffi::_abi()){(dart.core::int) → dart.core::int*}, #externalFieldValue.{dart.ffi::_Compound::_typedDataBase}{dart.core::Object}, #C8, #C13.{dart.core::List::[]}(dart.ffi::_abi()){(dart.core::int) → dart.core::int*});
4545
@#C11

‎pkg/front_end/testcases/incremental/crash_05.yaml.world.2.expect

Lines changed: 1 addition & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -39,7 +39,7 @@ library from "org-dartlang-test:///main.dart" as main {
3939
return new lib::Y::#fromTypedDataBase( block {
4040
synthesized dart.core::Object #typedDataBase = this.{dart.ffi::_Compound::_typedDataBase}{dart.core::Object};
4141
synthesized dart.core::int #offset = #C9.{dart.core::List::[]}(dart.ffi::_abi()){(dart.core::int) → dart.core::int*};
42-
} =>#typedDataBase is{ForLegacy} dart.ffi::Pointer<dynamic> ?{dart.core::Object} dart.ffi::_fromAddress<lib::Y>(#typedDataBase.{dart.ffi::Pointer::address}{dart.core::int}.{dart.core::num::+}(#offset){(dart.core::num) → dart.core::num}) : let synthesized dart.typed_data::TypedData #typedData = dart._internal::unsafeCast<dart.typed_data::TypedData>(#typedDataBase) in #typedData.{dart.typed_data::TypedData::buffer}{dart.typed_data::ByteBuffer}.{dart.typed_data::ByteBuffer::asUint8List}(#typedData.{dart.typed_data::TypedData::offsetInBytes}{dart.core::int}.{dart.core::num::+}(#offset){(dart.core::num) → dart.core::num}, #C13.{dart.core::List::[]}(dart.ffi::_abi()){(dart.core::int) → dart.core::int*}){([dart.core::int, dart.core::int?]) → dart.typed_data::Uint8List});
42+
} =>#typedDataBase is{ForLegacy} dart.ffi::Pointer<dart.ffi::NativeType> ?{dart.core::Object} dart.ffi::_fromAddress<lib::Y>(#typedDataBase.{dart.ffi::Pointer::address}{dart.core::int}.{dart.core::num::+}(#offset){(dart.core::num) → dart.core::num}) : let synthesized dart.typed_data::TypedData #typedData = dart._internal::unsafeCast<dart.typed_data::TypedData>(#typedDataBase) in #typedData.{dart.typed_data::TypedData::buffer}{dart.typed_data::ByteBuffer}.{dart.typed_data::ByteBuffer::asUint8List}(#typedData.{dart.typed_data::TypedData::offsetInBytes}{dart.core::int}.{dart.core::num::+}(#offset){(dart.core::num) → dart.core::num}, #C13.{dart.core::List::[]}(dart.ffi::_abi()){(dart.core::int) → dart.core::int*}){([dart.core::int, dart.core::int?]) → dart.typed_data::Uint8List});
4343
set xx(lib::Y #externalFieldValue) → void
4444
return dart.ffi::_memCopy(this.{dart.ffi::_Compound::_typedDataBase}{dart.core::Object}, #C9.{dart.core::List::[]}(dart.ffi::_abi()){(dart.core::int) → dart.core::int*}, #externalFieldValue.{dart.ffi::_Compound::_typedDataBase}{dart.core::Object}, #C8, #C13.{dart.core::List::[]}(dart.ffi::_abi()){(dart.core::int) → dart.core::int*});
4545
@#C11

‎pkg/front_end/testcases/incremental/crash_06.yaml.world.1.expect

Lines changed: 1 addition & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -33,7 +33,7 @@ library from "org-dartlang-test:///structs.dart" as str {
3333
return new str::Y::#fromTypedDataBase( block {
3434
synthesized dart.core::Object #typedDataBase = this.{dart.ffi::_Compound::_typedDataBase}{dart.core::Object};
3535
synthesized dart.core::int #offset = #C8.{dart.core::List::[]}(dart.ffi::_abi()){(dart.core::int) → dart.core::int*};
36-
} =>#typedDataBase is{ForLegacy} dart.ffi::Pointer<dynamic> ?{dart.core::Object} dart.ffi::_fromAddress<str::Y>(#typedDataBase.{dart.ffi::Pointer::address}{dart.core::int}.{dart.core::num::+}(#offset){(dart.core::num) → dart.core::num}) : let synthesized dart.typed_data::TypedData #typedData = dart._internal::unsafeCast<dart.typed_data::TypedData>(#typedDataBase) in #typedData.{dart.typed_data::TypedData::buffer}{dart.typed_data::ByteBuffer}.{dart.typed_data::ByteBuffer::asUint8List}(#typedData.{dart.typed_data::TypedData::offsetInBytes}{dart.core::int}.{dart.core::num::+}(#offset){(dart.core::num) → dart.core::num}, #C8.{dart.core::List::[]}(dart.ffi::_abi()){(dart.core::int) → dart.core::int*}){([dart.core::int, dart.core::int?]) → dart.typed_data::Uint8List});
36+
} =>#typedDataBase is{ForLegacy} dart.ffi::Pointer<dart.ffi::NativeType> ?{dart.core::Object} dart.ffi::_fromAddress<str::Y>(#typedDataBase.{dart.ffi::Pointer::address}{dart.core::int}.{dart.core::num::+}(#offset){(dart.core::num) → dart.core::num}) : let synthesized dart.typed_data::TypedData #typedData = dart._internal::unsafeCast<dart.typed_data::TypedData>(#typedDataBase) in #typedData.{dart.typed_data::TypedData::buffer}{dart.typed_data::ByteBuffer}.{dart.typed_data::ByteBuffer::asUint8List}(#typedData.{dart.typed_data::TypedData::offsetInBytes}{dart.core::int}.{dart.core::num::+}(#offset){(dart.core::num) → dart.core::num}, #C8.{dart.core::List::[]}(dart.ffi::_abi()){(dart.core::int) → dart.core::int*}){([dart.core::int, dart.core::int?]) → dart.typed_data::Uint8List});
3737
set yy(str::Y #externalFieldValue) → void
3838
return dart.ffi::_memCopy(this.{dart.ffi::_Compound::_typedDataBase}{dart.core::Object}, #C8.{dart.core::List::[]}(dart.ffi::_abi()){(dart.core::int) → dart.core::int*}, #externalFieldValue.{dart.ffi::_Compound::_typedDataBase}{dart.core::Object}, #C7, #C8.{dart.core::List::[]}(dart.ffi::_abi()){(dart.core::int) → dart.core::int*});
3939
@#C10

‎pkg/front_end/testcases/incremental/crash_06.yaml.world.2.expect

Lines changed: 1 addition & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -33,7 +33,7 @@ library from "org-dartlang-test:///structs.dart" as str {
3333
return new str::Y::#fromTypedDataBase( block {
3434
synthesized dart.core::Object #typedDataBase = this.{dart.ffi::_Compound::_typedDataBase}{dart.core::Object};
3535
synthesized dart.core::int #offset = #C8.{dart.core::List::[]}(dart.ffi::_abi()){(dart.core::int) → dart.core::int*};
36-
} =>#typedDataBase is{ForLegacy} dart.ffi::Pointer<dynamic> ?{dart.core::Object} dart.ffi::_fromAddress<str::Y>(#typedDataBase.{dart.ffi::Pointer::address}{dart.core::int}.{dart.core::num::+}(#offset){(dart.core::num) → dart.core::num}) : let synthesized dart.typed_data::TypedData #typedData = dart._internal::unsafeCast<dart.typed_data::TypedData>(#typedDataBase) in #typedData.{dart.typed_data::TypedData::buffer}{dart.typed_data::ByteBuffer}.{dart.typed_data::ByteBuffer::asUint8List}(#typedData.{dart.typed_data::TypedData::offsetInBytes}{dart.core::int}.{dart.core::num::+}(#offset){(dart.core::num) → dart.core::num}, #C8.{dart.core::List::[]}(dart.ffi::_abi()){(dart.core::int) → dart.core::int*}){([dart.core::int, dart.core::int?]) → dart.typed_data::Uint8List});
36+
} =>#typedDataBase is{ForLegacy} dart.ffi::Pointer<dart.ffi::NativeType> ?{dart.core::Object} dart.ffi::_fromAddress<str::Y>(#typedDataBase.{dart.ffi::Pointer::address}{dart.core::int}.{dart.core::num::+}(#offset){(dart.core::num) → dart.core::num}) : let synthesized dart.typed_data::TypedData #typedData = dart._internal::unsafeCast<dart.typed_data::TypedData>(#typedDataBase) in #typedData.{dart.typed_data::TypedData::buffer}{dart.typed_data::ByteBuffer}.{dart.typed_data::ByteBuffer::asUint8List}(#typedData.{dart.typed_data::TypedData::offsetInBytes}{dart.core::int}.{dart.core::num::+}(#offset){(dart.core::num) → dart.core::num}, #C8.{dart.core::List::[]}(dart.ffi::_abi()){(dart.core::int) → dart.core::int*}){([dart.core::int, dart.core::int?]) → dart.typed_data::Uint8List});
3737
set yy(str::Y #externalFieldValue) → void
3838
return dart.ffi::_memCopy(this.{dart.ffi::_Compound::_typedDataBase}{dart.core::Object}, #C8.{dart.core::List::[]}(dart.ffi::_abi()){(dart.core::int) → dart.core::int*}, #externalFieldValue.{dart.ffi::_Compound::_typedDataBase}{dart.core::Object}, #C7, #C8.{dart.core::List::[]}(dart.ffi::_abi()){(dart.core::int) → dart.core::int*});
3939
@#C10

‎pkg/front_end/testcases/incremental/issue_46666.yaml.world.1.expect

Lines changed: 2 additions & 2 deletions
Original file line numberDiff line numberDiff line change
@@ -27,7 +27,7 @@ library from "org-dartlang-test:///a.dart" as a {
2727
return new a::NestedStruct::#fromTypedDataBase( block {
2828
synthesized dart.core::Object #typedDataBase = this.{dart.ffi::_Compound::_typedDataBase}{dart.core::Object};
2929
synthesized dart.core::int #offset = #C17.{dart.core::List::[]}(dart.ffi::_abi()){(dart.core::int) → dart.core::int*};
30-
} =>#typedDataBase is{ForLegacy} dart.ffi::Pointer<dynamic> ?{dart.core::Object} dart.ffi::_fromAddress<a::NestedStruct>(#typedDataBase.{dart.ffi::Pointer::address}{dart.core::int}.{dart.core::num::+}(#offset){(dart.core::num) → dart.core::num}) : let synthesized dart.typed_data::TypedData #typedData = dart._internal::unsafeCast<dart.typed_data::TypedData>(#typedDataBase) in #typedData.{dart.typed_data::TypedData::buffer}{dart.typed_data::ByteBuffer}.{dart.typed_data::ByteBuffer::asUint8List}(#typedData.{dart.typed_data::TypedData::offsetInBytes}{dart.core::int}.{dart.core::num::+}(#offset){(dart.core::num) → dart.core::num}, #C17.{dart.core::List::[]}(dart.ffi::_abi()){(dart.core::int) → dart.core::int*}){([dart.core::int, dart.core::int?]) → dart.typed_data::Uint8List});
30+
} =>#typedDataBase is{ForLegacy} dart.ffi::Pointer<dart.ffi::NativeType> ?{dart.core::Object} dart.ffi::_fromAddress<a::NestedStruct>(#typedDataBase.{dart.ffi::Pointer::address}{dart.core::int}.{dart.core::num::+}(#offset){(dart.core::num) → dart.core::num}) : let synthesized dart.typed_data::TypedData #typedData = dart._internal::unsafeCast<dart.typed_data::TypedData>(#typedDataBase) in #typedData.{dart.typed_data::TypedData::buffer}{dart.typed_data::ByteBuffer}.{dart.typed_data::ByteBuffer::asUint8List}(#typedData.{dart.typed_data::TypedData::offsetInBytes}{dart.core::int}.{dart.core::num::+}(#offset){(dart.core::num) → dart.core::num}, #C17.{dart.core::List::[]}(dart.ffi::_abi()){(dart.core::int) → dart.core::int*}){([dart.core::int, dart.core::int?]) → dart.typed_data::Uint8List});
3131
set blah(a::NestedStruct #externalFieldValue) → void
3232
return dart.ffi::_memCopy(this.{dart.ffi::_Compound::_typedDataBase}{dart.core::Object}, #C17.{dart.core::List::[]}(dart.ffi::_abi()){(dart.core::int) → dart.core::int*}, #externalFieldValue.{dart.ffi::_Compound::_typedDataBase}{dart.core::Object}, #C8, #C17.{dart.core::List::[]}(dart.ffi::_abi()){(dart.core::int) → dart.core::int*});
3333
@#C19
@@ -78,7 +78,7 @@ library from "org-dartlang-test:///b.dart" as b {
7878
return new a::StructA::#fromTypedDataBase( block {
7979
synthesized dart.core::Object #typedDataBase = this.{dart.ffi::_Compound::_typedDataBase}{dart.core::Object};
8080
synthesized dart.core::int #offset = #C9.{dart.core::List::[]}(dart.ffi::_abi()){(dart.core::int) → dart.core::int*};
81-
} =>#typedDataBase is{ForLegacy} dart.ffi::Pointer<dynamic> ?{dart.core::Object} dart.ffi::_fromAddress<a::StructA>(#typedDataBase.{dart.ffi::Pointer::address}{dart.core::int}.{dart.core::num::+}(#offset){(dart.core::num) → dart.core::num}) : let synthesized dart.typed_data::TypedData #typedData = dart._internal::unsafeCast<dart.typed_data::TypedData>(#typedDataBase) in #typedData.{dart.typed_data::TypedData::buffer}{dart.typed_data::ByteBuffer}.{dart.typed_data::ByteBuffer::asUint8List}(#typedData.{dart.typed_data::TypedData::offsetInBytes}{dart.core::int}.{dart.core::num::+}(#offset){(dart.core::num) → dart.core::num}, #C21.{dart.core::List::[]}(dart.ffi::_abi()){(dart.core::int) → dart.core::int*}){([dart.core::int, dart.core::int?]) → dart.typed_data::Uint8List});
81+
} =>#typedDataBase is{ForLegacy} dart.ffi::Pointer<dart.ffi::NativeType> ?{dart.core::Object} dart.ffi::_fromAddress<a::StructA>(#typedDataBase.{dart.ffi::Pointer::address}{dart.core::int}.{dart.core::num::+}(#offset){(dart.core::num) → dart.core::num}) : let synthesized dart.typed_data::TypedData #typedData = dart._internal::unsafeCast<dart.typed_data::TypedData>(#typedDataBase) in #typedData.{dart.typed_data::TypedData::buffer}{dart.typed_data::ByteBuffer}.{dart.typed_data::ByteBuffer::asUint8List}(#typedData.{dart.typed_data::TypedData::offsetInBytes}{dart.core::int}.{dart.core::num::+}(#offset){(dart.core::num) → dart.core::num}, #C21.{dart.core::List::[]}(dart.ffi::_abi()){(dart.core::int) → dart.core::int*}){([dart.core::int, dart.core::int?]) → dart.typed_data::Uint8List});
8282
set b1(a::StructA #externalFieldValue) → void
8383
return dart.ffi::_memCopy(this.{dart.ffi::_Compound::_typedDataBase}{dart.core::Object}, #C9.{dart.core::List::[]}(dart.ffi::_abi()){(dart.core::int) → dart.core::int*}, #externalFieldValue.{dart.ffi::_Compound::_typedDataBase}{dart.core::Object}, #C8, #C21.{dart.core::List::[]}(dart.ffi::_abi()){(dart.core::int) → dart.core::int*});
8484
@#C19

‎pkg/front_end/testcases/incremental/issue_46666.yaml.world.2.expect

Lines changed: 2 additions & 2 deletions
Original file line numberDiff line numberDiff line change
@@ -27,7 +27,7 @@ library from "org-dartlang-test:///a.dart" as a {
2727
return new a::NestedStruct::#fromTypedDataBase( block {
2828
synthesized dart.core::Object #typedDataBase = this.{dart.ffi::_Compound::_typedDataBase}{dart.core::Object};
2929
synthesized dart.core::int #offset = #C17.{dart.core::List::[]}(dart.ffi::_abi()){(dart.core::int) → dart.core::int*};
30-
} =>#typedDataBase is{ForLegacy} dart.ffi::Pointer<dynamic> ?{dart.core::Object} dart.ffi::_fromAddress<a::NestedStruct>(#typedDataBase.{dart.ffi::Pointer::address}{dart.core::int}.{dart.core::num::+}(#offset){(dart.core::num) → dart.core::num}) : let synthesized dart.typed_data::TypedData #typedData = dart._internal::unsafeCast<dart.typed_data::TypedData>(#typedDataBase) in #typedData.{dart.typed_data::TypedData::buffer}{dart.typed_data::ByteBuffer}.{dart.typed_data::ByteBuffer::asUint8List}(#typedData.{dart.typed_data::TypedData::offsetInBytes}{dart.core::int}.{dart.core::num::+}(#offset){(dart.core::num) → dart.core::num}, #C17.{dart.core::List::[]}(dart.ffi::_abi()){(dart.core::int) → dart.core::int*}){([dart.core::int, dart.core::int?]) → dart.typed_data::Uint8List});
30+
} =>#typedDataBase is{ForLegacy} dart.ffi::Pointer<dart.ffi::NativeType> ?{dart.core::Object} dart.ffi::_fromAddress<a::NestedStruct>(#typedDataBase.{dart.ffi::Pointer::address}{dart.core::int}.{dart.core::num::+}(#offset){(dart.core::num) → dart.core::num}) : let synthesized dart.typed_data::TypedData #typedData = dart._internal::unsafeCast<dart.typed_data::TypedData>(#typedDataBase) in #typedData.{dart.typed_data::TypedData::buffer}{dart.typed_data::ByteBuffer}.{dart.typed_data::ByteBuffer::asUint8List}(#typedData.{dart.typed_data::TypedData::offsetInBytes}{dart.core::int}.{dart.core::num::+}(#offset){(dart.core::num) → dart.core::num}, #C17.{dart.core::List::[]}(dart.ffi::_abi()){(dart.core::int) → dart.core::int*}){([dart.core::int, dart.core::int?]) → dart.typed_data::Uint8List});
3131
set blah(a::NestedStruct #externalFieldValue) → void
3232
return dart.ffi::_memCopy(this.{dart.ffi::_Compound::_typedDataBase}{dart.core::Object}, #C17.{dart.core::List::[]}(dart.ffi::_abi()){(dart.core::int) → dart.core::int*}, #externalFieldValue.{dart.ffi::_Compound::_typedDataBase}{dart.core::Object}, #C8, #C17.{dart.core::List::[]}(dart.ffi::_abi()){(dart.core::int) → dart.core::int*});
3333
@#C19
@@ -78,7 +78,7 @@ library from "org-dartlang-test:///b.dart" as b {
7878
return new a::StructA::#fromTypedDataBase( block {
7979
synthesized dart.core::Object #typedDataBase = this.{dart.ffi::_Compound::_typedDataBase}{dart.core::Object};
8080
synthesized dart.core::int #offset = #C9.{dart.core::List::[]}(dart.ffi::_abi()){(dart.core::int) → dart.core::int*};
81-
} =>#typedDataBase is{ForLegacy} dart.ffi::Pointer<dynamic> ?{dart.core::Object} dart.ffi::_fromAddress<a::StructA>(#typedDataBase.{dart.ffi::Pointer::address}{dart.core::int}.{dart.core::num::+}(#offset){(dart.core::num) → dart.core::num}) : let synthesized dart.typed_data::TypedData #typedData = dart._internal::unsafeCast<dart.typed_data::TypedData>(#typedDataBase) in #typedData.{dart.typed_data::TypedData::buffer}{dart.typed_data::ByteBuffer}.{dart.typed_data::ByteBuffer::asUint8List}(#typedData.{dart.typed_data::TypedData::offsetInBytes}{dart.core::int}.{dart.core::num::+}(#offset){(dart.core::num) → dart.core::num}, #C21.{dart.core::List::[]}(dart.ffi::_abi()){(dart.core::int) → dart.core::int*}){([dart.core::int, dart.core::int?]) → dart.typed_data::Uint8List});
81+
} =>#typedDataBase is{ForLegacy} dart.ffi::Pointer<dart.ffi::NativeType> ?{dart.core::Object} dart.ffi::_fromAddress<a::StructA>(#typedDataBase.{dart.ffi::Pointer::address}{dart.core::int}.{dart.core::num::+}(#offset){(dart.core::num) → dart.core::num}) : let synthesized dart.typed_data::TypedData #typedData = dart._internal::unsafeCast<dart.typed_data::TypedData>(#typedDataBase) in #typedData.{dart.typed_data::TypedData::buffer}{dart.typed_data::ByteBuffer}.{dart.typed_data::ByteBuffer::asUint8List}(#typedData.{dart.typed_data::TypedData::offsetInBytes}{dart.core::int}.{dart.core::num::+}(#offset){(dart.core::num) → dart.core::num}, #C21.{dart.core::List::[]}(dart.ffi::_abi()){(dart.core::int) → dart.core::int*}){([dart.core::int, dart.core::int?]) → dart.typed_data::Uint8List});
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set b1(a::StructA #externalFieldValue) → void
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return dart.ffi::_memCopy(this.{dart.ffi::_Compound::_typedDataBase}{dart.core::Object}, #C9.{dart.core::List::[]}(dart.ffi::_abi()){(dart.core::int) → dart.core::int*}, #externalFieldValue.{dart.ffi::_Compound::_typedDataBase}{dart.core::Object}, #C8, #C21.{dart.core::List::[]}(dart.ffi::_abi()){(dart.core::int) → dart.core::int*});
8484
@#C19

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