Changes:
Doing this always in precompiled mode meant increased data segment sizes
when CodeSourceMaps are stored, since encoded line/column information is
larger in the LEB-like encoding used. Now we only store column
information when we produce non-symbolic stacks, since the increased
space needed to store the columns is instead in DWARF sections and can
be stripped or elided.
Original description:
Previously, we passed line number information to the stack trace printer
and to DWARF by changing the non-special positions in the CodeSourceMap
to line numbers in precompiled mode. However, doing this lost column
information.
We get the column information back in the majority of cases by encoding
the line number and column information when neither is too large to pack
together into 30 bits. (Here, 20 bits for line and 10 bits for column.)
Otherwise, we just store the line information as before, though due to
using a bit to encode whether column info exists, it's reduced to 30
bits. If the line info is too big for that, we just return kNoSourcePos.
Cq-Include-Trybots: luci.dart.try:vm-kernel-precomp-nnbd-linux-release-x64-try,vm-kernel-precomp-linux-release-x64-try,vm-kernel-precomp-linux-product-x64-try,vm-kernel-precomp-linux-debug-x64-try,vm-kernel-precomp-linux-release-simarm_x64-try
Change-Id: Ia8baee71468da6100a170fa305d03059ffd17f78
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/151822
Commit-Queue: Tess Strickland <sstrickl@google.com>
Reviewed-by: Martin Kustermann <kustermann@google.com>
This reverts commit 7c34a80c11.
Reason for revert: This change seems to cause >2% code size regression
in flutter-release mode.
Original change's description:
> [vm/aot] Keep column information when possible for precompiled mode.
>
> Previously, we passed line number information to the stack trace printer
> and to DWARF by changing the non-special positions in the CodeSourceMap
> to line numbers in precompiled mode. However, doing this lost column
> information.
>
> We get the column information back in the majority of cases by encoding
> the line number and column information when neither is too large to pack
> together into 30 bits. (Here, 20 bits for line and 10 bits for column.)
> Otherwise, we just store the line information as before, though due to
> using a bit to encode whether column info exists, it's reduced to 30
> bits. If the line info is too big for that, we just return kNoSourcePos.
>
> Cq-Include-Trybots: luci.dart.try:vm-kernel-precomp-nnbd-linux-release-x64-try,vm-kernel-precomp-linux-release-x64-try,vm-kernel-precomp-linux-product-x64-try,vm-kernel-precomp-linux-debug-x64-try,vm-kernel-precomp-linux-release-simarm_x64-try
> Change-Id: Id1c826f10871e2f304fa40a59d8b704404d3a2c9
> Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/151507
> Commit-Queue: Tess Strickland <sstrickl@google.com>
> Reviewed-by: Ryan Macnak <rmacnak@google.com>
TBR=rmacnak@google.com,alexmarkov@google.com,sstrickl@google.com
Change-Id: I5cf97543d1ac2731bb27bdb58ae97af6f22f2cfb
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Cq-Include-Trybots: luci.dart.try:vm-kernel-precomp-nnbd-linux-release-x64-try, vm-kernel-precomp-linux-release-x64-try, vm-kernel-precomp-linux-product-x64-try, vm-kernel-precomp-linux-debug-x64-try, vm-kernel-precomp-linux-release-simarm_x64-try
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/151820
Reviewed-by: Martin Kustermann <kustermann@google.com>
Commit-Queue: Martin Kustermann <kustermann@google.com>
Previously, we passed line number information to the stack trace printer
and to DWARF by changing the non-special positions in the CodeSourceMap
to line numbers in precompiled mode. However, doing this lost column
information.
We get the column information back in the majority of cases by encoding
the line number and column information when neither is too large to pack
together into 30 bits. (Here, 20 bits for line and 10 bits for column.)
Otherwise, we just store the line information as before, though due to
using a bit to encode whether column info exists, it's reduced to 30
bits. If the line info is too big for that, we just return kNoSourcePos.
Cq-Include-Trybots: luci.dart.try:vm-kernel-precomp-nnbd-linux-release-x64-try,vm-kernel-precomp-linux-release-x64-try,vm-kernel-precomp-linux-product-x64-try,vm-kernel-precomp-linux-debug-x64-try,vm-kernel-precomp-linux-release-simarm_x64-try
Change-Id: Id1c826f10871e2f304fa40a59d8b704404d3a2c9
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/151507
Commit-Queue: Tess Strickland <sstrickl@google.com>
Reviewed-by: Ryan Macnak <rmacnak@google.com>
IsTopTypeForAssignability is renamed to IsTopTypeForSubtyping to better
reflect that it works both for subtyping and assignability.
Most uses of IsTopType() are changed to IsTopTypeForSubtyping().
The remaining uses of IsTopType() are checking for top types in
instance-of ('is') tests, so IsTopType is renamed to IsTopTypeForInstanceOf.
Also, Instance::IsFutureOrInstanceOf is renamed to RuntimeTypeIsSubtypeOfFutureOr
to align it with RuntimeTypeIsSubtypeOf and reflect that it is
calculating subtyping and not instance-of.
Change-Id: Ib8d3574edc1b90d80f5528330bd84b099b37d2b8
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/145446
Commit-Queue: Alexander Markov <alexmarkov@google.com>
Reviewed-by: Régis Crelier <regis@google.com>
Make them form its own source set (libdart_compiler) and completely exclude
them from AOT runtime targets.
Previously we had some inconsistencies, with some files were using
DART_PRECOMPILED_RUNTIME to fully or partially exclude either contents
from their headers or from implementation, while other files did nothing
and relied on linker to throw their contents away.
This change tries to address this inconsistency.
A follow up change would include a check in most compiler headers which
would prohibit to use them while building AOT runtime.
Change-Id: Ief11b11cbc518b301d3e93fce80580a31bbad151
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/142993
Reviewed-by: Alexander Markov <alexmarkov@google.com>
Reviewed-by: Martin Kustermann <kustermann@google.com>
For each selector, count the number of calls to the selector that are
both reachable and polymorphic according to the TFA. Only include
selectors in the table with non-zero counts.
This reduces the dispatch table size by 30% in dart2js and by 49% in
Flutter Gallery (312k memory use reduction on ARM64).
Call counts are transferred in a dedicated metadata block with
per-selector information. This mechanism also prepares for transferring
other per-selector information in the future.
Change-Id: Iba15aa4d6c50e67e53c3fd8e542123d3fc98bd07
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/132603
Reviewed-by: Alexander Markov <alexmarkov@google.com>
This is a Dart-tailored implementation of the "row-displacement
dispatch table" technique for closed-world instance calls:
All interface targets in the program are grouped into selectors such
that all targets that could potentially be called from the same call
site have the same selector (currently just grouped by name).
Each selector is assigned a selector offset such that offset + classid
is unique for all selector/classid combinations where the class
implements the selector.
At every instance call site that has an interface target (i.e. where
the static type of the receiver is not dynamic), the selector offset +
receiver classid is computed and used as index into a global table of
entry points.
If the receiver can be null (as determined by the front-end TFA and the
VM type propagation), a null check is inserted before the call.
An arguments descriptor is provided (only) for selectors that need it
(those which have type parameters or optional/named parameters).
The dispatch table calls don't need the monomorphic entry code, so for
functions that are only called via dispatch table calls (i.e. never
called dynamically), the monomorphic entry code is left out.
Some future improvements to the table dispatch implementation are
mentioned in https://github.com/dart-lang/sdk/issues/40188
The table dispatch flag is disabled by default in this commit. A
separate commit enables the flag.
Change-Id: Ic2911742b4a2c9a8d3bc7df60605454cbe4c0714
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/126648
Commit-Queue: Aske Simon Christensen <askesc@google.com>
Reviewed-by: Martin Kustermann <kustermann@google.com>
Reviewed-by: Alexander Markov <alexmarkov@google.com>
This also fixes the implementation of 'null is T' in legacy vs opted-in library
by making it independent of strong/weak mode.
Includes updates to type propagation and call specializer.
Change-Id: I2d347ef277e08cef779faf51a972e863244ef095
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/130922
Commit-Queue: Régis Crelier <regis@google.com>
Reviewed-by: Alexander Markov <alexmarkov@google.com>
Reviewed-by: Liam Appelbe <liama@google.com>
This change fixes the following problems:
* In precompiler, all PcDescriptor entries which do not have
try_index are ignored, so try_index should be always set when building
PcDescriptors for bytecode try-blocks.
* Precompiler should use more general binary_declaration_offset()
instead of kernel_offset() as a hashcode for a Field.
* Querying of PrecodueAttributesMetadata should not try to use
kernel AST if function/field is declared in bytecode.
Also, added printing of operands for LoadUntagged IL instruction to
simplify debugging, and excluded precompiler.{h,cc} from
DART_PRECOMPILED_RUNTIME.
Change-Id: I563b81a0b31b5b268709b1b7b0c3bea4e76813d8
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/118120
Reviewed-by: Régis Crelier <regis@google.com>
Reviewed-by: Aart Bik <ajcbik@google.com>
Commit-Queue: Alexander Markov <alexmarkov@google.com>
Collect token positions of field declared in bytecode.
Improve debugger debugging: Disassemble both bytecode and code when applicable.
Change-Id: I56188cf24ef4bfe8a93cce11c2f4505152abdd02
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/112680
Commit-Queue: Régis Crelier <regis@google.com>
Reviewed-by: Alexander Markov <alexmarkov@google.com>
Refactor Kernel::CollectTokenPositionsFor, but do not try to factorize code for
fields and functions, as too many handles would need to be passed around.
Bytecode reading creates duplicate script objects requiring scripts to be
matched by their url rather than by their raw address when collecting token
positions in bytecode. However, url comparison is not yet used, because
collecting token positions in the duplicated script 'dart:core/map.dart'
(in default mode) causes crashes in kernel reading. Will revisit.
Fix service test valid_source locations_test.dart and make sure fields
are properly reloaded, except fields injected by fasta.
Remove unused argument 'record' of KernelReaderHelper::ReadPosition().
Handle bytecode stub frame in IsAsyncMachinery() tester in debugger.
Change-Id: Ifbddcaec00e0696f7de13c5cf1e74380b31d2419
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/112402
Commit-Queue: Régis Crelier <regis@google.com>
Reviewed-by: Alexander Markov <alexmarkov@google.com>
Fix these issues:
Function breakpoint could wrongly be set before the first DebugCheck opcode.
Loaded bytecode closures were not found by FindCompiledFunctions.
Improve verbose debug output by providing address and offset of breakpoint.
Change-Id: Icfeb1204348af313de21cab358603c11e89d2503
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/111309
Reviewed-by: Ryan Macnak <rmacnak@google.com>
Commit-Queue: Régis Crelier <regis@google.com>
Certain functions (e.g. abstract) don't have bytecode although they are
declared in bytecode. As CollectBytecodeFunctionTokenPositions is called
for all functions, it should account for absence of bytecode.
This fix prevents crashes when certain functions are opened in observatory profiler.
Change-Id: I191b01df60a1eff06c8b09fbce80f15fbf409a21
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/108965
Reviewed-by: Ryan Macnak <rmacnak@google.com>
Reviewed-by: Régis Crelier <regis@google.com>
Commit-Queue: Alexander Markov <alexmarkov@google.com>
Modified list of bytecodes that check for debug breaks (wip).
Make sure source positions are not interpreted as return addresses.
Fix skipping of bytecode stub frames when stepping.
Fix DEBUG_CHECK macro to call debugger twice for breakpoint and following step.
Various minor bug fixes and printing improvements.
Change-Id: I36713de0548d060eddb7cbfd6fadb05c731e881a
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/108205
Commit-Queue: Régis Crelier <regis@google.com>
Reviewed-by: Ryan Macnak <rmacnak@google.com>
Size of a large application:
Before: 26628600
After: 21480120 (-19.3%)
Size of snapshots:
isolate_snapshot_framework.bin
Before: 9322496
After: 6782976 (-27.2%)
isolate_snapshot_product_framework.bin
Before: 9166848
After: 6602752 (-27.9%)
Regressions in tests:
1) Test language_2/type_alias_equality_test/04 fails similarly to default mode, as VM
does not implement comparison of function types according to the specification.
Previously this test was passing as function types were canonicalized in bytecode,
which was not always correct. This CL fixes the problem with canonicalization of
function types in bytecode and the test starts failing again.
2) Tests standalone_2/entrypoints_verification_test, standalone_2/io/test_extension_test,
standalone_2/io/test_extension_fail_test fail as native extensions are not supported
in bytecode yet. These tests start passing after df5e7aac17,
which switched bytecode tests to kernel service (on x64), because kernel service doesn't
drop ASTs. This CL switches from reading AST library declarations to bytecode even if
AST is not removed, so tests fail again.
Change-Id: I8b7ba44bfa49d0b1599b2509553ff7c831a4e244
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/104700
Reviewed-by: Ryan Macnak <rmacnak@google.com>
Reviewed-by: Martin Kustermann <kustermann@google.com>
Reviewed-by: Régis Crelier <regis@google.com>
Commit-Queue: Alexander Markov <alexmarkov@google.com>
This reverts commit ab6aeaa106.
Revert "[vm/compiler] Speed up the compiler part which deals with kernel reading up in DEBUG mode"
This reverts commit b316210d94.
Reason for revert: regression of snapshot sizes (DNO-599).
Original change's description:
> [vm/kernel] Use GC-tracked ExternalTypedData/TypedDataView for kernel buffers
>
> Until now we often leaked kernel buffers (e.g. hot reload buffers) because various
> objects were referencing ExternalTypedData objects pointing into the middle of
> c-allocated memory. This made it impossible for the GC to determine when the last
> reference is gone.
>
> This CL ensures that the actual buffers are *always* made available via
> ExternalTypedData and any inner pointers into it are created via TypedDataViews.
>
> The embedder guarantees to the free kernel buffers it has provided to:
> - Dart_CreateIsolateFromKernel
> - Dart_LoadScriptFromKernel
> - Dart_LoadLibraryFromKernel
> - Dart_SetDartLibrarySourcesKernel
> on isolate shutdown.
>
> All other kernel buffers will get a finalizer attached, which ensures the
> kernel buffers get freed by the GC once they are no longer referenced:
> - Kernel blobs for expression evaluation
> - Kernel blobs for Hot-Reload
> - Kernel blobs for cc tests
>
> Fixes https://github.com/dart-lang/sdk/issues/33973
> Fixes https://github.com/dart-lang/sdk/issues/36857
> Issue https://github.com/dart-lang/sdk/issues/37030
>
> Change-Id: I1cc410c94c0f4b229413e793728a261afcb10aaf
> Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/103130
> Reviewed-by: Ryan Macnak <rmacnak@google.com>
> Commit-Queue: Martin Kustermann <kustermann@google.com>
TBR=kustermann@google.com,rmacnak@google.com
# Not skipping CQ checks because original CL landed > 1 day ago.
Change-Id: I49715d2400f4a5c8806b7d6a2912b7258f671a0a
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/104343
Reviewed-by: Alexander Markov <alexmarkov@google.com>
Reviewed-by: Siva Annamalai <asiva@google.com>
Auto-Submit: Alexander Markov <alexmarkov@google.com>
Until now we often leaked kernel buffers (e.g. hot reload buffers) because various
objects were referencing ExternalTypedData objects pointing into the middle of
c-allocated memory. This made it impossible for the GC to determine when the last
reference is gone.
This CL ensures that the actual buffers are *always* made available via
ExternalTypedData and any inner pointers into it are created via TypedDataViews.
The embedder guarantees to the free kernel buffers it has provided to:
- Dart_CreateIsolateFromKernel
- Dart_LoadScriptFromKernel
- Dart_LoadLibraryFromKernel
- Dart_SetDartLibrarySourcesKernel
on isolate shutdown.
All other kernel buffers will get a finalizer attached, which ensures the
kernel buffers get freed by the GC once they are no longer referenced:
- Kernel blobs for expression evaluation
- Kernel blobs for Hot-Reload
- Kernel blobs for cc tests
Fixes https://github.com/dart-lang/sdk/issues/33973
Fixes https://github.com/dart-lang/sdk/issues/36857
Issue https://github.com/dart-lang/sdk/issues/37030
Change-Id: I1cc410c94c0f4b229413e793728a261afcb10aaf
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/103130
Reviewed-by: Ryan Macnak <rmacnak@google.com>
Commit-Queue: Martin Kustermann <kustermann@google.com>
This is a temporary workaround for VM crashes when using observatory
in bytecode modes. Crashes heppen when CollectTokenPositionsFor
tries to access kernel AST (via kernel_offset()) but there isn't one.
Change-Id: I4c4dbb84653957c2f276f62216c12b58d2d666c6
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/99084
Reviewed-by: Régis Crelier <regis@google.com>
Commit-Queue: Alexander Markov <alexmarkov@google.com>
This change replaces kernel AST declarations of fields and functions
with bytecode declarations.
Size of dilp files is reduced by 11-12%.
Startup latency:
Time to the first full frame: 1.945s -> 1.687s
FinalizeClass: 554ms -> 277ms
FinishClassLoading: 296ms -> 156ms
There are following regressions in bytecode mode, which will be fixed
in future:
* dart:mirrors are not supported yet (implementation of mirrors relies
on reading kernel AST in certain cases).
As the result, lib_2/mirrors/* tests fail.
* native extensions are not supported yet (annotations on libraries
and classes in AST are cleaned up as they could reference members
which are now removed from AST).
As the result, standalone_2/entrypoints_verification_test test fails.
* language_2/spread_collections/const_error_test/* tests fail
due to https://github.com/dart-lang/sdk/issues/36286.
Change-Id: I5130f401fd7b84038b136136e7ccc1a6e51b6cea
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/97561
Commit-Queue: Alexander Markov <alexmarkov@google.com>
Reviewed-by: Ryan Macnak <rmacnak@google.com>
This change extracts code which reads kernel in order to get
covariance attributes of parameters into a separate function.
This removes code duplication and makes it easier to hook up
reading of covariance attributes from bytecode in future.
Change-Id: Ia19caf3edaf45df9e0bb1bdc715fac21d26788dc
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/96560
Commit-Queue: Alexander Markov <alexmarkov@google.com>
Auto-Submit: Alexander Markov <alexmarkov@google.com>
Reviewed-by: Martin Kustermann <kustermann@google.com>
Reviewed-by: Samir Jindel <sjindel@google.com>
This is a reland of 1a4cff1bd4
Original change's description:
> [VM] Remove unused flags
>
> Remove the following flags which are always ON
> --strong
> --reify_generic_functions
>
> and these flags which are not applicable anymore
> --error-on-bad-override
> --error-on-bad-type
> --enable-type-checks
>
> Change-Id: I6e1aeb68e663953f4ae49ca94ea0daa87b661900
> Reviewed-on: https://dart-review.googlesource.com/c/79431
> Commit-Queue: Siva Annamalai <asiva@google.com>
> Reviewed-by: Alexander Markov <alexmarkov@google.com>
> Reviewed-by: Régis Crelier <regis@google.com>
Change-Id: Ib4452c22fb05eed38820708abb648939e03b1df0
Reviewed-on: https://dart-review.googlesource.com/c/84923
Reviewed-by: Siva Annamalai <asiva@google.com>
Remove the following flags which are always ON
--strong
--reify_generic_functions
and these flags which are not applicable anymore
--error-on-bad-override
--error-on-bad-type
--enable-type-checks
Change-Id: I6e1aeb68e663953f4ae49ca94ea0daa87b661900
Reviewed-on: https://dart-review.googlesource.com/c/79431
Commit-Queue: Siva Annamalai <asiva@google.com>
Reviewed-by: Alexander Markov <alexmarkov@google.com>
Reviewed-by: Régis Crelier <regis@google.com>
This reverts commit 2de63ac01c.
Reason for revert: This triggers shutdown deadlocks for some reason:
#0 0xf7782cd9 __kernel_vsyscall
#1 0xf7753d0b pthread_cond_wait@@GLIBC_2.3.2
#2 0x0108a515 dart::Monitor::WaitMicros(long long)
#3 0x0108a467 dart::Monitor::Wait(long long)
#4 0x00fe9048 dart::KernelIsolate::Shutdown()
#5 0x00f99ae4 dart::Dart::Cleanup()
#6 0x01278fce Dart_Cleanup
#7 0x00dd347e dart::bin::main(int, char**)
#8 0x00dd3d64 main
#9 0xf745caf3 __libc_start_main
#10 0x00dd2021 _start
TID 30443:
#0 0xf7782cd9 __kernel_vsyscall
#1 0xf7531ee6 epoll_wait
#2 0x00ddab61 dart::bin::EventHandlerImplementation::Poll(unsigned int)
#3 0x00dfb2d4 dart::bin::ThreadStart(void*)
#4 0xf774ff72 start_thread
#5 0xf753143e __clone
TID 30444:
#0 0xf7782cd9 __kernel_vsyscall
#1 0xf7753d0b pthread_cond_wait@@GLIBC_2.3.2
#2 0x0108a515 dart::Monitor::WaitMicros(long long)
#3 0x0108a467 dart::Monitor::Wait(long long)
#4 0x012484d8 dart::BackgroundCompiler::Run()
#5 0x01248a37 dart::BackgroundCompilerTask::Run()
#6 0x0112203a dart::ThreadPool::Worker::Loop()
#7 0x01121efe dart::ThreadPool::Worker::Main(unsigned int)
#8 0x01089e73 dart::ThreadStart(void*)
#9 0xf774ff72 start_thread
#10 0xf753143e __clone
Original change's description:
> [VM] Add @pragma annotations on Field, make @pragma annotations work generally
>
> Currently the @pramga('vm:exact-result-type') annotation only works if
> the function is a recognized method. This change changes that to make
> the VM just look if a function has the annotation (no matter if it's
> also in the list of recognized methods or not).
>
> Furthermore this CL adds a "has_pragma" bit to [Field] objects, similar
> to how we have it on [Function]/[Class]es. This allows annotating
> fields with types, as we do with function return types.
>
> Furthermore this CL lets the type propgagator use
> @pragma('vm:exact-result-type') annotations to narrow the [CompileType]
> set on [LoadFieldInstr]s.
>
> Since the @pragma is a general feature, this CL moves the
> `Function::FindPragma()` to `Library::FindPragma` (which is where any
> other metadata lookup happens). We also let the `FindPragma` accept any
> of Class/Function/Field objects.
>
> Furthermore this CL adds a bailout if we try to evaluate metadata in
> the background compiler, since the background compiler is not allowed
> to execute generated code. The bailout should trigger a re-compilation
> on the mutator thread.
>
> Furthermore the `FindPragma()` function is fixed to handle the case
> when the evaluation of the metadata results in e.g. a language error.
> In this case we simply claim to not have found a pragma annotation.
>
> Issue https://github.com/dart-lang/sdk/issues/31954
>
> Change-Id: I0900a80d5ae0f3e8d09baf13cba1b20dd974df31
> Reviewed-on: https://dart-review.googlesource.com/c/84037
> Commit-Queue: Martin Kustermann <kustermann@google.com>
> Reviewed-by: Alexander Markov <alexmarkov@google.com>
> Reviewed-by: Vyacheslav Egorov <vegorov@google.com>
TBR=vegorov@google.com,kustermann@google.com,alexmarkov@google.com,sjindel@google.com
Change-Id: Ic0d22d32b0eea3a76ec245cabab0006f97ca1b05
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Reviewed-on: https://dart-review.googlesource.com/c/84622
Reviewed-by: Martin Kustermann <kustermann@google.com>
Currently the @pramga('vm:exact-result-type') annotation only works if
the function is a recognized method. This change changes that to make
the VM just look if a function has the annotation (no matter if it's
also in the list of recognized methods or not).
Furthermore this CL adds a "has_pragma" bit to [Field] objects, similar
to how we have it on [Function]/[Class]es. This allows annotating
fields with types, as we do with function return types.
Furthermore this CL lets the type propgagator use
@pragma('vm:exact-result-type') annotations to narrow the [CompileType]
set on [LoadFieldInstr]s.
Since the @pragma is a general feature, this CL moves the
`Function::FindPragma()` to `Library::FindPragma` (which is where any
other metadata lookup happens). We also let the `FindPragma` accept any
of Class/Function/Field objects.
Furthermore this CL adds a bailout if we try to evaluate metadata in
the background compiler, since the background compiler is not allowed
to execute generated code. The bailout should trigger a re-compilation
on the mutator thread.
Furthermore the `FindPragma()` function is fixed to handle the case
when the evaluation of the metadata results in e.g. a language error.
In this case we simply claim to not have found a pragma annotation.
Issue https://github.com/dart-lang/sdk/issues/31954
Change-Id: I0900a80d5ae0f3e8d09baf13cba1b20dd974df31
Reviewed-on: https://dart-review.googlesource.com/c/84037
Commit-Queue: Martin Kustermann <kustermann@google.com>
Reviewed-by: Alexander Markov <alexmarkov@google.com>
Reviewed-by: Vyacheslav Egorov <vegorov@google.com>
TFA is improved to detect if a method was called using dynamic selector,
was ever called not via this, and whether the tear-off was taken.
This information is used to remove parameter type checks in AOT.
Less accurate selector-based analysis, which was used previously to get
this information, is now used only if TFA is disabled.
Also, precompiler is improved to omit method extractors and implicit
closure functions if analysis proved that tear-off is not taken.
Flutter gallery snapshot size: -0.8%
Change-Id: Iec01257dfdc78104752104df14e2ce078d326a96
Reviewed-on: https://dart-review.googlesource.com/77005
Commit-Queue: Alexander Markov <alexmarkov@google.com>
Reviewed-by: Samir Jindel <sjindel@google.com>
Tess Strickland