Commit Graph

882 Commits

Author SHA1 Message Date
Daco Harkes 1fff52a715 [vm/ffi] Rewrite Pointer.elementAt calls in CFE
This rewrites `elementAt` calls in the CFE to skip the runtime entry
for `sizeOf` when the type argument is constant.

The runtime entry is still used when the type argument is generic.
Forcing the type argument to be constant and removing the runtime entry
will be done in follow up CLs.

Bug: https://github.com/dart-lang/sdk/issues/44621
Bug: https://github.com/dart-lang/sdk/issues/38721

TEST=tests/ffi/data_test.dart

Change-Id: I480db43e7c115c24bd45f0ddab0cfea7eb8cfa58
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/182263
Reviewed-by: Clement Skau <cskau@google.com>
2021-02-02 16:33:54 +00:00
Daco Harkes 64bf73460f [vm/ffi] Rewrite sizeOf calls in CFE
This rewrites `sizeOf` calls in the CFE to skip the runtime entry when
the type argument is constant.

The runtime entry is still used when the type argument is generic.
Forcing the type argument to be constant and removing the runtime entry
will be done in follow up CLs.

Bug: https://github.com/dart-lang/sdk/issues/44621
Bug: https://github.com/dart-lang/sdk/issues/38721

TEST=tests/ffi/sizeof_test.dart

Change-Id: I17d14432e6ab22810729be6b5c2939a033d382c5
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/182262
Reviewed-by: Clement Skau <cskau@google.com>
2021-02-02 16:33:54 +00:00
Johnni Winther 97a4280e52 [cfe,dartdev,dart2js] Add support for --verbosity option
In response to https://github.com/dart-lang/sdk/issues/44727

TEST=pkg/dartdev/test/commands/compile_test.dart

Change-Id: I56b67d9362a415acd721c1cce2f7e2232d2493df
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/180566
Commit-Queue: Johnni Winther <johnniwinther@google.com>
Reviewed-by: Jens Johansen <jensj@google.com>
2021-01-22 18:33:44 +00:00
Daco Harkes d74b2f4672 [vm/ffi] Deprecate Pointer.elementAt and sizeOf generic calls
The analyzer and CFE now report a warning on calls to
`Pointer<T extends NativeType>.elementAt()` and
`sizeOf<T extends NativeType>()` where `T` is a generic.

Adapted from https://dart-review.googlesource.com/c/sdk/+/178200 to
only deprecate but not error out on generic calls.

Does not roll forward `package:ffi` to a version with the `Allocator`
but keeps the generic `sizeOf` invocation. This causes extra warnings
in the pkg/front_end testcases.

Issue: https://github.com/dart-lang/sdk/issues/38721

TEST=tests/ffi/data_test.dart
TEST=tests/ffi/sizeof_test.dart
TEST=tests/ffi/structs_test.dart
TEST=tests/ffi/vmspecific_static_checks_test.dart

Change-Id: I8f41c4dc04fc44e7e6c540ba87a3f41604130fe9
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/180560
Reviewed-by: Vyacheslav Egorov <vegorov@google.com>
2021-01-22 13:58:09 +00:00
Daco Harkes f74c9d43d3 [vm/ffi] Deprecate Pointer<T extends Struct>.ref generic calls
The analyzer and CFE now report a warning on calls to
`Pointer<T extends Struct>.ref` and `Pointer<T extends Struct>.[]`
where `T` is a generic.

Adapted from https://dart-review.googlesource.com/c/sdk/+/180190 to
only deprecate but not error out on generic calls to `.ref` and `[]`.

Issue: https://github.com/dart-lang/sdk/issues/38721

TEST=tests/ffi/vmspecific_static_checks_test.dart

Change-Id: I81353089d59f093730d63792e9dbcd0b2ff0c432
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/180365
Reviewed-by: Vyacheslav Egorov <vegorov@google.com>
2021-01-22 13:58:09 +00:00
Daco Harkes c3b30df798 [vm/ffi] Deprecate empty Structs
The analyzer and CFE now report a warning on subclasses of `Struct`
which have no native fields.

Adapted from https://dart-review.googlesource.com/c/sdk/+/180189 to
only deprecate, but not disallow empty structs.

Rolls `package:ffi` forward to migrate `Utf8` and `Utf16` to `Opaque`
to prevent tests from failing on those generating warnings for empty
structs.

Issue: https://github.com/dart-lang/sdk/issues/43974

TEST=tests/ffi/vmspecific_static_checks_test.dart

Change-Id: Ia364e31da66cb195570c2e2b729d03dd261f28a2
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/180361
Reviewed-by: Clement Skau <cskau@google.com>
Reviewed-by: Vyacheslav Egorov <vegorov@google.com>
2021-01-22 13:58:09 +00:00
Daco Harkes 1fe4597638 Revert "[vm/ffi] Disallow empty structs"
Revert submission 177862

Reason for revert: breaks g3 without https://github.com/flutter/engine/pull/23808
Reverted Changes:
I50b3b4c31:[vm/ffi] Roll `package:ffi` to `Allocator` and `Op...
I3f5b08c08:[vm/ffi] Change `Pointer<T extends Struct>.ref` to...
I6141c193b:[vm/ffi] Disallow empty structs

Change-Id: Ibe9e8200dbdafe0ee684a6a0ea19e06214edf5e0
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/180184
Reviewed-by: Daco Harkes <dacoharkes@google.com>
2021-01-20 21:37:11 +00:00
Daco Harkes 49ec189fb3 Revert "[vm/ffi] Change Pointer<T extends Struct>.ref to use s..."
Revert submission 177862

Reason for revert: breaks g3 without https://github.com/flutter/engine/pull/23808
Reverted Changes:
I50b3b4c31:[vm/ffi] Roll `package:ffi` to `Allocator` and `Op...
I3f5b08c08:[vm/ffi] Change `Pointer<T extends Struct>.ref` to...
I6141c193b:[vm/ffi] Disallow empty structs

Change-Id: I1bfe4d70a5f7f35039b8a01d599d33542872574c
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/180183
Reviewed-by: Daco Harkes <dacoharkes@google.com>
2021-01-20 21:37:11 +00:00
Daco Harkes 2e8f9b85a6 [vm/ffi] Change Pointer<T extends Struct>.ref to use static type
This CL changes the semantics of `Pointer<T extends Struct>.ref` to use
the compile-time `T` rather than the runtime `T`.

This enables tree shaking of subtypes of Struct and optimizing `.ref`.

Issue: https://github.com/dart-lang/sdk/issues/38721

TEST=tests/ffi/vmspecific_static_checks_test.dart
TEST=tests/ffi/*struct*test_.dart

Change-Id: I3f5b08c08ec0799ef8aab3c4177e2ac70d25501c
Cq-Include-Trybots: luci.dart.try:vm-precomp-ffi-qemu-linux-release-arm-try,analyzer-analysis-server-linux-try,analyzer-linux-release-try,analyzer-nnbd-linux-release-try,front-end-linux-release-x64-try,front-end-nnbd-linux-release-x64-try,benchmark-linux-try,dart-sdk-linux-try,pkg-linux-release-try,vm-ffi-android-release-arm-try,vm-ffi-android-release-arm64-try
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/177862
Commit-Queue: Daco Harkes <dacoharkes@google.com>
Reviewed-by: Aske Simon Christensen <askesc@google.com>
2021-01-20 18:08:25 +00:00
Daco Harkes 1a71f94998 [vm/ffi] Disallow empty structs
Closes: https://github.com/dart-lang/sdk/issues/43974

TEST=tests/ffi/vmspecific_static_checks_test.dart

Change-Id: I6141c193b6ac71e0dce2735322c62ffd84554cef
Cq-Include-Trybots: luci.dart.try:vm-precomp-ffi-qemu-linux-release-arm-try,analyzer-analysis-server-linux-try,analyzer-linux-release-try,analyzer-nnbd-linux-release-try,front-end-linux-release-x64-try,front-end-nnbd-linux-release-x64-try,benchmark-linux-try,dart-sdk-linux-try,pkg-linux-release-try,vm-ffi-android-release-arm-try,vm-ffi-android-release-arm64-try
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/177710
Reviewed-by: Aske Simon Christensen <askesc@google.com>
2021-01-20 18:08:25 +00:00
Johnni Winther e7a88b9f02 [vm] Tree shake stub targets
Stub target references for member signatures, forwarding stubs and mixin
stubs should be removed when tree shaking. Otherwise we might end up with
dangling references if the stub target was tree shaken.

Closes #44716

TEST=existing tests

Change-Id: I5fd67c0ab8db588ecbe5c40101bbea662e1ffb51
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/180141
Commit-Queue: Johnni Winther <johnniwinther@google.com>
Reviewed-by: Alexander Markov <alexmarkov@google.com>
2021-01-20 17:07:45 +00:00
Alexander Markov e200aebf83 [vm/aot/tfa] Add statistics for analysis time per TFA summary
While investigating AOT compilation time it could be useful to
understand which members were analyzed the most in TFA.

This change adds "global.type.flow.print.timings" environment flag to
measure and show top TFA summaries (roughly correspond to members)
which were analyzed most number of times and which took the most
time to analyze.

TEST=manual testing

Issue https://github.com/dart-lang/sdk/issues/42442

Change-Id: I07d3253d1e6eb390074b7edf7c21686124a938d1
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/179600
Commit-Queue: Alexander Markov <alexmarkov@google.com>
Reviewed-by: Aske Simon Christensen <askesc@google.com>
2021-01-19 18:55:42 +00:00
Alexander Markov 4f96421419 [vm/aot/tfa] Approximate wide cone types
In certain cases involving auto-generated Dart sources there could be a
huge number of allocated classes which are subtypes of a certain class.
Specializing such cone types to set types, as well as intersection and
union operations on such types may be slow and may severely affect
compilation time. Also, gradually discovering allocated classes in
such cone types may cause a lot of invalidations during analysis.

In order to avoid servere degradation of compilation time in such case,
this change adds WideConeType which works like a ConeType when number of
allocated classes is large, but it doesn't specialize to a SetType and
has more efficient but approximate implementation of union and
intersection.

Uncompressed size of Flutter gallery AOT snapshot (android/arm64):
WideConeType approximation for types with
>32 allocated subtypes: +0.1176%
>64 allocated subtypes: +0.0956%
>128 allocated subtypes: +0.0027%

For now conservative approximation is used when number of allocated
types >128.

TFA time of large app #1: 175s -> 119s (-32%)
TFA time of large app #2: 211s -> 81s (-61.6%)
Snapshot size changes are insignificant.

TEST=Stress tested on precomp bots with
maxAllocatedTypesInSetSpecializations = 3 and 0.

Issue: https://github.com/dart-lang/sdk/issues/42442
Issue: https://github.com/dart-lang/sdk/issues/43299
Change-Id: Idae33205ddda81714e4aeccc7ae292e0164be651
b/154155290, b/177498788, b/177497864
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/179200
Commit-Queue: Alexander Markov <alexmarkov@google.com>
Reviewed-by: Vyacheslav Egorov <vegorov@google.com>
Reviewed-by: Aske Simon Christensen <askesc@google.com>
2021-01-19 18:07:42 +00:00
Johnni Winther cad04f8604 [cfe,dart2js,dartdev] Show null safety mode for dart compile
This adds a new messages kind 'info' to the CFE for showing general
information during compilation. A 'configuration' options is added
to `CompilerOptions` for telling the CFE how it is run.

The configuration 'compile' is added for when the CFE is invoked to
produces an "executable" as when running `dart compile`. When
configuration is set, the CFE emits an info message about the
null safety compilation mode.

Support for `dart compile exe` and `dart compile js` is added in this
CL. Support for `dart compile kernel|app-jit|aot` is not included.

In response to https://github.com/dart-lang/sdk/issues/44234

TEST=pkg/dartdev/test/commands/compile_test.dart

Change-Id: I08f51e2a3f5ad4841c4d703bcd266b7afb63c7c6
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/178982
Commit-Queue: Johnni Winther <johnniwinther@google.com>
Reviewed-by: Jens Johansen <jensj@google.com>
2021-01-15 11:28:13 +00:00
Alexander Markov f4bb16232a [vm] Remove old version of protobuf-aware tree shaker
New, faster version of protobuf-aware tree shaker was introduced in
https://dart-review.googlesource.com/c/sdk/+/152100. It has been
used in Flutter use cases for a while.

This change replaces old version of transformation with the new one in
the pkg/vm/bin/protobuf_aware_treeshaker.dart tool and removes
the old version.

TEST=existing tests in pkg/vm/test/transformations

Change-Id: I01546ae9fdc9fea3228595270c2aff04a0894e6b
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/178281
Commit-Queue: Alexander Markov <alexmarkov@google.com>
Reviewed-by: Martin Kustermann <kustermann@google.com>
Reviewed-by: Sigurd Meldgaard <sigurdm@google.com>
Reviewed-by: Aske Simon Christensen <askesc@google.com>
2021-01-15 00:54:48 +00:00
Daco Harkes 5d40d52fca [vm/ffi] Add Opaque type
Issue: https://github.com/dart-lang/sdk/issues/44622
Issue: https://github.com/dart-lang/sdk/issues/43974

TEST=samples/ffi/sqlite/lib/src/bindings/types.dart
TEST=tests/ffi/vmspecific_static_checks_test.dart

Change-Id: Ib9e72df6a07b1bc2b72a7db66f945652814baf51
Cq-Include-Trybots: luci.dart.try:vm-precomp-ffi-qemu-linux-release-arm-try,analyzer-analysis-server-linux-try,analyzer-linux-release-try,analyzer-nnbd-linux-release-try,front-end-linux-release-x64-try,front-end-nnbd-linux-release-x64-try,benchmark-linux-try,dart-sdk-linux-try,pkg-linux-release-try,vm-ffi-android-release-arm-try,vm-ffi-android-release-arm64-try,vm-kernel-nnbd-win-debug-x64-try,vm-kernel-win-debug-x64-try
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/178984
Commit-Queue: Daco Harkes <dacoharkes@google.com>
Reviewed-by: Clement Skau <cskau@google.com>
2021-01-13 17:04:08 +00:00
Daco Harkes 4e2343c290 [vm/ffi] Introduce Allocator API
Introduces the Allocator API in `dart:ffi`.

This CL does not yet roll `package:ffi` to use `Allocator`, because that
breaks the checked in Dart in Fluter in g3. Instead, this coppies
`_MallocAllocator` from `package:ffi` into the ffi tests for testing.

This CL does not yet migrate off `allocate` and `free` in the SDK. That
is done in a dependent CL.

Issue: https://github.com/dart-lang/sdk/issues/44621
Issue: https://github.com/dart-lang/sdk/issues/38721

TEST=tests/ffi/allocator_test.dart
TEST=tests/ffi/calloc_test.dart
TEST=tests/ffi/vmspecific_static_checks_test.dart

Change-Id: I173e213a750b8b3f594bb8d4fc72575f2b6b91f7
Cq-Include-Trybots: luci.dart.try:vm-precomp-ffi-qemu-linux-release-arm-try,analyzer-analysis-server-linux-try,analyzer-linux-release-try,analyzer-nnbd-linux-release-try,front-end-linux-release-x64-try,front-end-nnbd-linux-release-x64-try,benchmark-linux-try,dart-sdk-linux-try,pkg-linux-release-try,vm-ffi-android-release-arm-try,vm-ffi-android-release-arm64-try,vm-kernel-nnbd-win-debug-x64-try,vm-kernel-win-debug-x64-try
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/177705
Reviewed-by: Clement Skau <cskau@google.com>
2021-01-13 17:04:08 +00:00
Alexander Markov 9d1a307954 [vm] Add specialized factory constructors for small list literals
Flutter gallery in release mode:
AOT snapshot size arm64 -0.22%, arm -0.21%
instructions size arm64 -0.46%, arm -0.4%

TEST=existing tests

Fixes https://github.com/dart-lang/sdk/issues/44391

Change-Id: I4733e91ecf4601c0bcde725cf9e97f5db0b8bc13
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/175821
Commit-Queue: Alexander Markov <alexmarkov@google.com>
Reviewed-by: Johnni Winther <johnniwinther@google.com>
Reviewed-by: Vyacheslav Egorov <vegorov@google.com>
2021-01-11 19:32:30 +00:00
Jens Johansen 5fac8d3d71 [CFE] Reproduction and fix of duplicate string-named 'abstract member-signature'
Before this CL, the map we use to "reuse" references when doing
experimental invalidation mapped from String to Reference.
In bug #44523 two abstract member-signatures have the same textual
(String) name meaning that via the lookup one would get the correct
one, one would get the wrong one, they would get the same one
which eventually causes a crash when trying to serialize.

This CL fixes the issue by mapping via the Name instead, which
basically - for private names - wraps the name and the library
which disambiguates it.

This CL also includes the reproduction of #44523.

Fixes #44523.

TEST=Mostly relying on existing test coverage.

Change-Id: Ib62ebca0b7f5092f0b8410d3c458663c3032eca1
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/177704
Commit-Queue: Jens Johansen <jensj@google.com>
Reviewed-by: Johnni Winther <johnniwinther@google.com>
2021-01-07 13:11:18 +00:00
Alexander Markov 3bef6cf639 [vm/aot] Attach unboxing info to unreachable members
Unreachable members could be used as interface targets of dispatch
table calls, so they should have correct unboxing metadata.
This change fixes attaching unboxing info to such members.

TEST=runtime/tests/vm/dart/regress_44563_test.dart

Fixes https://github.com/dart-lang/sdk/issues/44563

Change-Id: I5da6a8d07048904eb94b05bfba11bdf72d655e12
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/177621
Reviewed-by: Aske Simon Christensen <askesc@google.com>
Reviewed-by: Martin Kustermann <kustermann@google.com>
Commit-Queue: Alexander Markov <alexmarkov@google.com>
2021-01-06 18:12:51 +00:00
Johnni Winther b4d4316de0 [cfe] Rename stub kinds
ForwardingStub -> AbstractForwardingStub
ForwardingSuperStub -> ConcreteForwardingStub
MixinStub -> AbstractMixinStub
MixinSuperStub -> ConcreteMixinStub

TEST=refactoring

Change-Id: Ice76a41ce8e1071f553ed8fd3ecbb29c97377161
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/177129
Reviewed-by: Dmitry Stefantsov <dmitryas@google.com>
Commit-Queue: Johnni Winther <johnniwinther@google.com>
2020-12-29 16:54:55 +00:00
Johnni Winther 42f09a71ba [vm] Re-resolve stub targets on mixin deduplication
This ensures that stub targets are re-resolved when performing
mixin deduplication. In particular member signatures, whose stub
target point the member signature origin, need to be re-resolved
since the origin is serialized together with the interface target
in PropertyGet, PropertySet and MethodInvocation, and if not
re-resolved, might point to removed members.

TEST=pkg/vm/test/modular_kernel_plus_ast_test.dart

Closes #44560

Change-Id: Ib2dd923fbf736a9defe2df38bbc71d442f80b7bb
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/177127
Commit-Queue: Johnni Winther <johnniwinther@google.com>
Reviewed-by: Martin Kustermann <kustermann@google.com>
2020-12-29 15:01:35 +00:00
Johnni Winther 5ed4e5becd [cfe] Pass references instead of fields/procedures
TEST=refactoring

Change-Id: I6e2d46af9bd58673bda847ea5cf981616e1118b0
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/176667
Commit-Queue: Johnni Winther <johnniwinther@google.com>
Reviewed-by: Dmitry Stefantsov <dmitryas@google.com>
2020-12-29 11:46:15 +00:00
Johnni Winther 60702d4158 [cfe] Make field assignability immutable
Changes fields to be either mutable or immutable by construction.
This ensure that we don't create setter references for fields that
cannot be assigned to and is a prerequisite for replacing @fields/
@fields= canonical names with @getters/@setters.

TEST=existing expectation tests and verification

Change-Id: I70b9a504ee6f221b7c334ac02620feb0d5f7ae01
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/176665
Commit-Queue: Johnni Winther <johnniwinther@google.com>
Reviewed-by: Dmitry Stefantsov <dmitryas@google.com>
2020-12-28 16:11:14 +00:00
Daco Harkes b6b82dd3ac [vm/ffi] Support nested structs
This CL adds support for nested structs in FFI calls, callbacks, and
memory loads and stores through the Struct classes itself.

Nesting empty structs and nesting a structs in themselves (directly or
indirectly) is reported as error.

This feature is almost fully implemented in the CFE transformation.

Because structs depend on the sizes of their nested structs, the structs
now need to be processed in topological order.

Field access to nested structs branches at runtime on making a derived
Pointer if the backing memory of the outer struct was a Pointer or
making a TypedDataView if the backing memory of the outer struct was
a TypedData.

Assigning to a nested struct is a byte for byte copy from the source.

The only changes in the VM are contained in the native calling
convention calculation which now recursively needs to reason about
fundamental types instead of just 1 struct deep.

Because of the amount of corner cases in the calling conventions that
need to be covered, the tests are generated, rather than hand-written.

ABIs tested on CQ: x64 (Linux, MacOS, Windows), ia32 (Linux, Windows),
arm (Android softFP, Linux hardFP), arm64 Android.
ABIs tested locally through Flutter: arm64 iOS.
ABIs not tested: ia32 Android (emulator), x64 iOS (simulator), arm iOS.
TEST=runtime/bin/ffi_test/ffi_test_functions_generated.cc
TEST=runtime/bin/ffi_test/ffi_test_functions.cc
TEST=tests/{ffi,ffi_2}/function_structs_by_value_generated_test.dart
TEST=tests/{ffi,ffi_2}/function_callbacks_structs_by_value_generated_tes
TEST=tests/{ffi,ffi_2}/function_callbacks_structs_by_value_test.dart
TEST=tests/{ffi,ffi_2}/vmspecific_static_checks_test.dart

Closes https://github.com/dart-lang/sdk/issues/37271.

Contains a temporary workaround for
https://github.com/dart-lang/sdk/issues/44454.

Change-Id: I5e5d10e09e5c3fc209f5f7e997efe17bd362214d
Cq-Include-Trybots: luci.dart.try:dart-sdk-linux-try,dart-sdk-mac-try,dart-sdk-win-try,vm-ffi-android-debug-arm-try,vm-ffi-android-debug-arm64-try,vm-kernel-asan-linux-release-x64-try,vm-kernel-mac-debug-x64-try,vm-kernel-linux-debug-ia32-try,vm-kernel-linux-debug-x64-try,vm-kernel-nnbd-linux-debug-x64-try,vm-kernel-nnbd-linux-debug-ia32-try,vm-kernel-nnbd-mac-release-x64-try,vm-kernel-nnbd-win-debug-x64-try,vm-kernel-precomp-linux-debug-x64-try,vm-kernel-precomp-linux-debug-simarm_x64-try,vm-kernel-precomp-nnbd-linux-debug-x64-try,vm-kernel-precomp-win-release-x64-try,vm-kernel-reload-linux-debug-x64-try,vm-kernel-reload-rollback-linux-debug-x64-try,vm-kernel-win-debug-x64-try,vm-kernel-win-debug-ia32-try,vm-precomp-ffi-qemu-linux-release-arm-try,vm-kernel-precomp-obfuscate-linux-release-x64-try,vm-kernel-msan-linux-release-x64-try,vm-kernel-precomp-msan-linux-release-x64-try,vm-kernel-precomp-android-release-arm_x64-try,analyzer-analysis-server-linux-try
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/169221
Commit-Queue: Daco Harkes <dacoharkes@google.com>
Reviewed-by: Martin Kustermann <kustermann@google.com>
Reviewed-by: Dmitry Stefantsov <dmitryas@google.com>
2020-12-18 09:34:35 +00:00
Daco Harkes 3e7cda8a4e [vm/ffi] Support passing structs by value
This CL adds passing structs by value in FFI trampolines.
Nested structs and inline arrays are future work.
C defines passing empty structs as undefined behavior, so that is not
supported in this CL.

Suggested review order:
1) commit message
2) ffi/marshaller (decisions for what is done in IL and what in MC)
3) frontend/kernel_to_il (IL construction)
4) backend/il (MC generation from IL)
5) rest in VM

Overall architecture is that structs are split up into word-size chunks
in IL when this is possible: 1 definition in IL per chunk, 1 Location in
IL per chunk, and 1 NativeLocation for the backend per chunk.
In some cases it is not possible or less convenient to split into
chunks. In these cases TypedDataBase objects are stored into and loaded
from directly in machine code.
The various cases:
- FFI call arguments which are not passed as pointers: pass individual
  chunks to FFI call which already have the right location.
- FFI call arguments which are passed as pointers: Pass in TypedDataBase
  to FFI call, allocate space on the stack, and make a copy on the stack
  and pass the copies' address to the callee.
- FFI call return value: pass in TypedData to FFI call, and copy result
  in machine code.
- FFI callback arguments which are not passed as pointers: IL definition
  for each chunk, and populate a new TypedData with those chunks.
- FFI callback arguments which are passed as pointer: IL definition for
  the pointer, and copying of contents in IL.
- FFI return value when location is pointer: Copy data to callee result
  location in IL.
- FFI return value when location is not a pointer: Copy data in machine
  code to the right registers.

Some other notes about the implementation:
- Due to Store/LoadIndexed loading doubles from float arrays, we use
  a int32 instead and use the BitCastInstr.
- Linux ia32 uses `ret 4` when returning structs by value. This requires
  special casing in the FFI callback trampolines to either use `ret` or
  `ret 4` when returning.
- The 1 IL definition, 1 Location, and 1 NativeLocation approach does
  not remove the need for special casing PairLocations in the machine
  code generation because they are 1 Location belonging to 1 definition.

Because of the amount of corner cases in the calling conventions that
need to be covered, the tests are generated, rather than hand-written.

ABIs tested on CQ: x64 (Linux, MacOS, Windows), ia32 (Linux, Windows),
arm (Android softFP, Linux hardFP), arm64 Android.
ABIs tested locally through Flutter: ia32 Android (emulator), x64 iOS
(simulator), arm64 iOS.
ABIs not tested: arm iOS.
TEST=runtime/bin/ffi_test/ffi_test_functions_generated.cc
TEST=runtime/bin/ffi_test/ffi_test_functions.cc
TEST=tests/{ffi,ffi_2}/function_structs_by_value_generated_test.dart
TEST=tests/{ffi,ffi_2}/function_callbacks_structs_by_value_generated_tes
TEST=tests/{ffi,ffi_2}/function_callbacks_structs_by_value_test.dart
TEST=tests/{ffi,ffi_2}/vmspecific_static_checks_test.dart

Closes https://github.com/dart-lang/sdk/issues/36730.

Change-Id: I474d3a4ee1faadbe767ddadd1b696e24d8dc364c
Cq-Include-Trybots: luci.dart.try:dart-sdk-linux-try,dart-sdk-mac-try,dart-sdk-win-try,vm-ffi-android-debug-arm-try,vm-ffi-android-debug-arm64-try,vm-kernel-asan-linux-release-x64-try,vm-kernel-mac-debug-x64-try,vm-kernel-linux-debug-ia32-try,vm-kernel-linux-debug-x64-try,vm-kernel-nnbd-linux-debug-x64-try,vm-kernel-nnbd-linux-debug-ia32-try,vm-kernel-nnbd-mac-release-x64-try,vm-kernel-nnbd-win-debug-x64-try,vm-kernel-precomp-linux-debug-x64-try,vm-kernel-precomp-linux-debug-simarm_x64-try,vm-kernel-precomp-nnbd-linux-debug-x64-try,vm-kernel-precomp-win-release-x64-try,vm-kernel-reload-linux-debug-x64-try,vm-kernel-reload-rollback-linux-debug-x64-try,vm-kernel-win-debug-x64-try,vm-kernel-win-debug-ia32-try,vm-precomp-ffi-qemu-linux-release-arm-try,vm-kernel-precomp-obfuscate-linux-release-x64-try,vm-kernel-msan-linux-release-x64-try,vm-kernel-precomp-msan-linux-release-x64-try,vm-kernel-precomp-android-release-arm_x64-try,analyzer-analysis-server-linux-try
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/140290
Commit-Queue: Daco Harkes <dacoharkes@google.com>
Reviewed-by: Martin Kustermann <kustermann@google.com>
2020-12-14 16:22:48 +00:00
Johnni Winther 5dbb6e245b [kernel,cfe,ddc] Add new method invocation node to package:kernel
This adds
* InstanceInvocation, DynamicInvocation, FunctionInvocation, and
   LocalFunctionInvocation, EqualsCall, and EqualsNull as a future
   replacement for MethodInvocation.
* InstanceGet, DynamicGet, InstanceTearOff, and FunctionTearOff as a
   future replacement for PropertyGet
* InstanceSet and DynamicSet as a future replacement of PropertySet
* StaticTearOff as an addition to StaticGet

TEST=pkg/front_end/test/binary_md_vm_tags_and_version_test.dart

This CL combines
* https://dart-review.googlesource.com/c/sdk/+/171729
* https://dart-review.googlesource.com/c/sdk/+/172649
* https://dart-review.googlesource.com/c/sdk/+/172650
* https://dart-review.googlesource.com/c/sdk/+/172651

using the initial encoding fo EqualsCall and EqualsNull

Change-Id: I98e020b5f2b405a812663bdcd2c05aba8efa74c8
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/175480
Reviewed-by: Dmitry Stefantsov <dmitryas@google.com>
Commit-Queue: Johnni Winther <johnniwinther@google.com>
2020-12-14 10:55:48 +00:00
Lasse R.H. Nielsen 6e29700e16 Update List constructor documentation, deprecate constructor.
Emphasize that the operation is going away,
and mark constructor as deprecated.

TEST= Refactoring+deprecation only, covered by existing tests.

Change-Id: I82aa044cd2cf7bf347b624371399f44bda8f4a07
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/173261
Commit-Queue: Lasse R.H. Nielsen <lrn@google.com>
Reviewed-by: Konstantin Shcheglov <scheglov@google.com>
Reviewed-by: Nate Bosch <nbosch@google.com>
2020-12-07 16:20:28 +00:00
Alexander Markov f04757f6ea [vm] Specialize List.empty calls for growable and fixed-length lists
TEST=existing tests for List

Fixes https://github.com/dart-lang/sdk/issues/44388

Change-Id: I89eecb15b535cc5a3e1aeea350a306883b463b9f
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/175003
Commit-Queue: Alexander Markov <alexmarkov@google.com>
Reviewed-by: Vyacheslav Egorov <vegorov@google.com>
2020-12-06 23:31:55 +00:00
Johnni Winther d51ab9b62a [cfe] Add ProcedureStubKind
The enum `ProcedureStubKind` together with the flag `isSynthetic`
replaces the flags `isForwardingStub`, `isForwardingSemiStub`,
`isNoSuchMethodForwarder` and `isMemberSignature`.

The semantics of the existing properties on `Procedure` is unchanged.

The new MixinStub and MixinSuperStub stub kinds are not used yet and
the stub target for NoSuchMethodForwarder is not set yet.

TEST=refactoring


Change-Id: I6e81970dbb4baf0229f43c2a0bf0d5e575e65043
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/174462
Commit-Queue: Johnni Winther <johnniwinther@google.com>
Reviewed-by: Dmitry Stefantsov <dmitryas@google.com>
2020-12-02 16:35:58 +00:00
Jens Johansen 27ed7912af [kernel] Constant coverage recorded in dill
This adds the recorded constant coverage to the dill file.

runtimes for constant evaluation:
dart2js: No difference proven at 95.0% confidence
flutter gallery: No difference proven at 95.0% confidence
big internal app: No difference proven at 95.0% confidence

sdk sizes:
vm: ~0.0182%
dart2js: ~0.0137%
flutter: ~0.0197%

compile sizes:
dart2js: ~0.0179%
flutter gallery: ~0.0162%
big internal app: ~0.0414%

TEST=test was fixed.

Change-Id: I347751e4d96d4d62140d26ebe37960f46a0dfbfa
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/171948
Commit-Queue: Jens Johansen <jensj@google.com>
Reviewed-by: Johnni Winther <johnniwinther@google.com>
2020-12-01 12:30:14 +00:00
Clement Skau 2d36c85ff8 [vm] Removes support for --causal-async-stacks
All existing embedders have been opted into --lazy-async-stacks, the
VM also uses it as it's default in all configurations.

After this CL, any user of --causal-async-stacks will get an error
message when trying to use it.
=> In any such case, please simply remove the flag.

TEST=Exhaustive CQ.

Bug: https://github.com/dart-lang/sdk/issues/37668
Change-Id: Ia440afcf2dba464aa8b8cf381b93bbac8eb9f8dc
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/172564
Commit-Queue: Clement Skau <cskau@google.com>
Reviewed-by: Clement Skau <cskau@google.com>
Reviewed-by: Martin Kustermann <kustermann@google.com>
2020-12-01 07:27:14 +00:00
Aske Simon Christensen dcd5a8f005 [vm/aot] Two improvements to signature shaking (reland)
- Global parameter use analysis: when a parameter is only used directly
  as arguments to other calls, only consider it used if any of the
  target parameters are used.

- A parameter can be eliminated if the TFA infers that it has a constant
  value in every implementation.

This change also extends the test of the protobuf-aware tree shaker to
run the AOT global transformations on all its test cases in order to
check that the protobuf handling in that code path is not broken by
signature shaking.

Reduces ARM64 .so size of Flutter Gallery by 0.25% uncompressed, 0.37%
with gzip and 0.45% with brotli.

Issue: https://github.com/dart-lang/sdk/issues/40488

TEST=Existing test suite, expectation files for TFA test, extended test
of protobuf-aware tree shaker.
Change-Id: Ib00fe362f798c92592a260f72e7bccad04246bb2
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/173727
Commit-Queue: Aske Simon Christensen <askesc@google.com>
Reviewed-by: Martin Kustermann <kustermann@google.com>
2020-11-26 09:20:55 +00:00
Johnni Winther 79f36c9d49 [kernel] Rename readUInt to readUInt30 to match corresponding write-method.
TEST=Refactoring

Change-Id: I455c498065785909fb175a0b5fa82bd9d5b38f1f
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/173524
Commit-Queue: Johnni Winther <johnniwinther@google.com>
Reviewed-by: Jens Johansen <jensj@google.com>
2020-11-24 08:50:38 +00:00
Aske Simon Christensen 2149369ffd Revert "[vm/aot] Two improvements to signature shaking"
This reverts commit 09ee7d31a6.

Reason for revert: Broke protobuf aware tree shaker.

Original change's description:
> [vm/aot] Two improvements to signature shaking
>
> - Global parameter use analysis: when a parameter is only used directly
>   as arguments to other calls, only consider it used if any of the
>   target parameters are used.
>
> - A parameter can be eliminated if the TFA infers that it has a constant
>   value in every implementation.
>
> Reduces ARM64 .so size of Flutter Gallery by 0.25% uncompressed, 0.37%
> with gzip and 0.45% with brotli.
>
> TEST=Existing test suite, expectation files for TFA test.
> Change-Id: Iedae757f180c2215569b7a031a5f7dc0035a9b7d
> Cq-Do-Not-Cancel-Tryjobs: true
> Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/169884
> Commit-Queue: Aske Simon Christensen <askesc@google.com>
> Reviewed-by: Alexander Markov <alexmarkov@google.com>

TBR=kustermann@google.com,alexmarkov@google.com,askesc@google.com

Change-Id: Ib64149dee605c2efa38345130c4a18e5ed8e0a4b
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/173274
Reviewed-by: Aske Simon Christensen <askesc@google.com>
Commit-Queue: Aske Simon Christensen <askesc@google.com>
2020-11-23 10:42:16 +00:00
Aske Simon Christensen 09ee7d31a6 [vm/aot] Two improvements to signature shaking
- Global parameter use analysis: when a parameter is only used directly
  as arguments to other calls, only consider it used if any of the
  target parameters are used.

- A parameter can be eliminated if the TFA infers that it has a constant
  value in every implementation.

Reduces ARM64 .so size of Flutter Gallery by 0.25% uncompressed, 0.37%
with gzip and 0.45% with brotli.

TEST=Existing test suite, expectation files for TFA test.
Change-Id: Iedae757f180c2215569b7a031a5f7dc0035a9b7d
Cq-Do-Not-Cancel-Tryjobs: true
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/169884
Commit-Queue: Aske Simon Christensen <askesc@google.com>
Reviewed-by: Alexander Markov <alexmarkov@google.com>
2020-11-23 09:43:43 +00:00
Ivan Inozemtsev d0f3471dd9 Bump protobuf, bazel_worker, and dart2js_info
Protobuf and bazel_worker are migrated to null safety, dart2js_info
just broadens dependency version range to be compatible with null safe
protobuf.

Also regenerate test protos in vm test cases and update expected ASTs
and add support for conditional expressions to protobuf aware tree shaker.

Change-Id: I019f0fd6c5688302cc5127e1be8368a3ea600439
TEST= Covered by existing tests
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/172646
Commit-Queue: Ivan Inozemtsev <iinozemtsev@google.com>
Reviewed-by: Ivan Inozemtsev <iinozemtsev@google.com>
Reviewed-by: Sigurd Meldgaard <sigurdm@google.com>
Reviewed-by: Jake Macdonald <jakemac@google.com>
Reviewed-by: Alexander Markov <alexmarkov@google.com>
Reviewed-by: David Morgan <davidmorgan@google.com>
2020-11-19 10:15:23 +00:00
Johnni Winther 887ab360e5 Revert "[kernel] Ensure that visitors don't implicitly returns null"
This reverts commit 4a3f121341.

The changes broke flutter/engine

TEST=It's a revert!

Change-Id: I1e65e6cfab03795a21a64a96fe3ed72e6ba8ecd9
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/172760
Commit-Queue: Johnni Winther <johnniwinther@google.com>
Reviewed-by: Johnni Winther <johnniwinther@google.com>
Reviewed-by: Jens Johansen <jensj@google.com>
2020-11-18 14:51:30 +00:00
Johnni Winther 4a3f121341 [kernel] Ensure that visitors don't implicitly returns null
This is in preparation to migrate package:kernel to null safety.
For the visitor interfaces to support non-nullable return types, the
implementations must avoid using `null` as return value in its base case.

TEST=Refactoring

Change-Id: I9f9b318982148d844be9826a5f8c88374a9fc402
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/172180
Commit-Queue: Johnni Winther <johnniwinther@google.com>
Reviewed-by: Jens Johansen <jensj@google.com>
2020-11-18 11:54:30 +00:00
Alexander Markov d1f32cccd3 [vm/aot/tfa] Do not infer that late fields without initializer are nullable
This CL teaches TFA that late fields without initializer are not
default-initialized with null.

TEST=Existing tests for late fields + write_only_field3_nnbd TFA unit test.

Change-Id: I9719beab06248ec84dd2db794c3f6eacabeb9c6e
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/172480
Commit-Queue: Alexander Markov <alexmarkov@google.com>
Reviewed-by: Martin Kustermann <kustermann@google.com>
2020-11-17 17:42:38 +00:00
Aske Simon Christensen b11d057572 [vm] Look for the recognized pragma in the unboxer and signature shaker.
This removes the conservative exclusion of everything below num in the
unboxer, and it allows some methods marked as entry points to not be
entry points, as they are not actually referred explicitly in VM code.

TEST=Existing test suite.
Change-Id: If465b9081ac278a105ba99c23a49f5516b7bfbc0
Cq-Do-Not-Cancel-Tryjobs: true
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/169401
Commit-Queue: Aske Simon Christensen <askesc@google.com>
Reviewed-by: Martin Kustermann <kustermann@google.com>
Reviewed-by: Alexander Markov <alexmarkov@google.com>
2020-11-16 13:49:50 +00:00
Liam Appelbe 504e9a32f9 Reland "[wasm] Remove dart:wasm"
This is a reland of ade333dd54

Original change's description:
> [wasm] Remove dart:wasm
>
> I'm not entirely sure why I had to modify a random set of fingerprints
> in runtime/vm/compiler/recognized_methods_list.h, but when I did a debug
> build it had some fingerprint errors.
>
> Change-Id: Ib0a0cccb37f2efba509e2b37b6eabe790fa933c4
> TEST= Deleting stuff, so not really necessary
> Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/170620
> Commit-Queue: Liam Appelbe <liama@google.com>
> Reviewed-by: Liam Appelbe <liama@google.com>
> Reviewed-by: Ryan Macnak <rmacnak@google.com>

Change-Id: I0d1388f6312358cc62bb32f5ac7b88a3187223c9
TEST= Deleting stuff, so not really necessary
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/171940
Commit-Queue: Ivan Inozemtsev <iinozemtsev@google.com>
Reviewed-by: Liam Appelbe <liama@google.com>
2020-11-13 20:40:24 +00:00
Siva Annamalai 54a91f26c4 Revert "[wasm] Remove dart:wasm"
This reverts commit ade333dd54.

Reason for revert: This broke both the Flutter HHH and Google3 bots. It looks like some co-ordination is required between the Google3 and Flutter engine build changes for this CL to land.

Original change's description:
> [wasm] Remove dart:wasm
>
> I'm not entirely sure why I had to modify a random set of fingerprints
> in runtime/vm/compiler/recognized_methods_list.h, but when I did a debug
> build it had some fingerprint errors.
>
> Change-Id: Ib0a0cccb37f2efba509e2b37b6eabe790fa933c4
> TEST= Deleting stuff, so not really necessary
> Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/170620
> Commit-Queue: Liam Appelbe <liama@google.com>
> Reviewed-by: Liam Appelbe <liama@google.com>
> Reviewed-by: Ryan Macnak <rmacnak@google.com>

TBR=rmacnak@google.com,liama@google.com

Change-Id: I244d7b3549845dd71719176a62b6ec3a4c4b5f86
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/171860
Reviewed-by: Siva Annamalai <asiva@google.com>
2020-11-13 01:54:10 +00:00
Liam Appelbe ade333dd54 [wasm] Remove dart:wasm
I'm not entirely sure why I had to modify a random set of fingerprints
in runtime/vm/compiler/recognized_methods_list.h, but when I did a debug
build it had some fingerprint errors.

Change-Id: Ib0a0cccb37f2efba509e2b37b6eabe790fa933c4
TEST= Deleting stuff, so not really necessary
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/170620
Commit-Queue: Liam Appelbe <liama@google.com>
Reviewed-by: Liam Appelbe <liama@google.com>
Reviewed-by: Ryan Macnak <rmacnak@google.com>
2020-11-12 19:22:29 +00:00
Johnni Winther 7b89827956 [cfe] Support bit mask for enabling specific late lowerings
TEST=pkg/front_end/testcases/late_lowering/late_lowering_bitmasks.dart

Closes #43993

Change-Id: I47d238dd7cf0ea22983a38bed86e415330070596
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/171580
Commit-Queue: Johnni Winther <johnniwinther@google.com>
Reviewed-by: Dmitry Stefantsov <dmitryas@google.com>
2020-11-11 14:06:30 +00:00
Dmitry Stefantsov d54e2bb568 [cfe,ddc,dart2js,vm] Add NullType
This CL is the sum of the following 5 CLs:
* https://dart-review.googlesource.com/c/sdk/+/170342/
* https://dart-review.googlesource.com/c/sdk/+/170344/
* https://dart-review.googlesource.com/c/sdk/+/170345/
* https://dart-review.googlesource.com/c/sdk/+/170346/
* https://dart-review.googlesource.com/c/sdk/+/170347/

The reason for landing the 5 CLs as one CL is to prevent potential
troubles with bisecting over the branch because the change is fully
functional only with all 5 CLs.

Closes #40122.

TEST=Verified by changes in .expect files in pkg/vm/.
Bug: https://github.com/dart-lang/sdk/issues/40122
Change-Id: Ib8197802fdc69694387ae47ac990c58b3aaab7a5
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/170689
Commit-Queue: Dmitry Stefantsov <dmitryas@google.com>
Reviewed-by: Johnni Winther <johnniwinther@google.com>
2020-11-06 12:43:52 +00:00
Jens Johansen 9ec87c2da0 [kernel] Field has 2 references
Change-Id: I9c946119e55256b9fbcbf3076ea008aaa1312e86
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/168949
Commit-Queue: Jens Johansen <jensj@google.com>
Reviewed-by: Johnni Winther <johnniwinther@google.com>
2020-11-03 16:02:16 +00:00
Alexander Markov 061848e97e Cleanup misc remaining references to bytecode
Change-Id: I37c2dfb29a5bc4faf1478fb31623749cb8f67d67
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/169502
Commit-Queue: Alexander Markov <alexmarkov@google.com>
Reviewed-by: Daco Harkes <dacoharkes@google.com>
Reviewed-by: Régis Crelier <regis@google.com>
2020-10-28 21:51:20 +00:00
Jens Johansen ae5fc78992 [kernel] Remove 'addMember'
Most of the time one already knows at the call site if it's a Field,
a Procedure etc --- so use that instead.

For now I'll leave the corresponding getters that are basically
documented as "don't use" ("[...] for convenience, not efficiency.
Consider manually iterating the members [...]").

Change-Id: Ib732759432c62963e6645f85f6df301c4281df9d
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/168826
Commit-Queue: Jens Johansen <jensj@google.com>
Reviewed-by: Johnni Winther <johnniwinther@google.com>
2020-10-27 11:36:58 +00:00
Aske Simon Christensen 23ee425de7 [vm/aot/tfa] Signature shaking for both static and instance methods
The existing signature shaker transforms optional and named parameters
of static and top-level methods and constructors into required
parameters whenever they are always passed.

This change improves signature shaking in a number of areas:
- Extend signature shaking to cover instance methods.
- Remove parameters which are never passed.
- Remove parameters which are not used.
- Transform signatures before unboxing, enabling transformed parameters
  to be unboxed.

TFA summaries for transformed functions are updated to stay in sync with
the program for later transformations.

Reduces instructions size of Flutter Gallery on ARM64 by 2.2%.

Issue: https://github.com/dart-lang/sdk/issues/40488

Change-Id: I39e364bc23b01e4502864d7369a745a9278cfb92
Cq-Do-Not-Cancel-Tryjobs: true
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/161175
Commit-Queue: Aske Simon Christensen <askesc@google.com>
Reviewed-by: Martin Kustermann <kustermann@google.com>
Reviewed-by: Alexander Markov <alexmarkov@google.com>
2020-10-26 09:48:05 +00:00