Currently we have things called XPtr which are not what you get from ptr().
Old world:
handle->raw() returns RawObject* (tagged)
raw_obj->ptr() returns RawObject* (untagged)
After 6fe15f6df9:
handle->raw() returns ObjectPtr
obj_ptr->ptr() returns ObjectLayout*
New world:
handle->ptr() returns ObjectPtr
obj_ptr->untag() returns UntaggedObject*
TEST=ci
Change-Id: I6c7f34014cf20737607caaf84979838300d12df2
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/149367
Commit-Queue: Ryan Macnak <rmacnak@google.com>
Reviewed-by: Martin Kustermann <kustermann@google.com>
Reviewed-by: Siva Annamalai <asiva@google.com>
Reviewed-by: Vyacheslav Egorov <vegorov@google.com>
Assembler now always knows whether LR contains return address
or can be safely cloberred.
TEST=tested through normal test suite
Cq-Include-Trybots: luci.dart.try:vm-kernel-linux-release-simarm-try,vm-kernel-linux-release-simarm64-try,vm-kernel-precomp-linux-release-simarm-try,vm-kernel-precomp-linux-release-simarm64-try,vm-ffi-android-release-arm64-try,vm-ffi-android-release-arm-try,vm-kernel-precomp-android-release-arm_x64-try,vm-kernel-precomp-android-release-arm64-try
Change-Id: I0b436509389cfd29ee413fd28930fb2d6b07616e
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/174468
Commit-Queue: Vyacheslav Egorov <vegorov@google.com>
Reviewed-by: Alexander Markov <alexmarkov@google.com>
Reviewed-by: Martin Kustermann <kustermann@google.com>
The differences between the different implementations are very
minor, so abstract out the few that remain into Assembler:
* Change Load<X>FromPoolOffset to Load<X>FromPoolIndex and do pool
offset calculations internally, since all caller sites have the pool
index. (Especially important because the pool register is tagged on
X64 and ARM and untagged on ARM64, so this abstracts that away.)
* Add default for pool register argument on ARM, since ARM64 already had
one and X64 doesn't take a pool register argument.
Other changes:
* Use specific TestTypeABI registers within the helper method that adds
caller-side checks instead of passing registers as arguments and
document which registers are used for input or output (and when, if
they are used conditionally).
Cq-Include-Trybots: luci.dart.try:vm-kernel-linux-debug-x64-try,vm-kernel-nnbd-linux-debug-x64-try,vm-kernel-linux-debug-ia32-try,vm-kernel-nnbd-linux-debug-ia32-try,vm-kernel-precomp-linux-debug-simarm_x64-try,vm-kernel-precomp-linux-debug-x64-try,vm-kernel-precomp-nnbd-linux-debug-simarm_x64-try,vm-kernel-precomp-nnbd-linux-debug-x64-try,vm-kernel-linux-release-simarm-try,vm-kernel-linux-release-simarm64-try,vm-kernel-nnbd-linux-release-simarm-try,vm-kernel-nnbd-linux-release-simarm64-try,vm-kernel-precomp-linux-release-simarm-try,vm-kernel-precomp-linux-release-simarm64-try,vm-kernel-precomp-nnbd-linux-release-simarm64-try
Change-Id: Ifc7a0eaa6aacf7f629aa9647b028500648af653d
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/167803
Commit-Queue: Tess Strickland <sstrickl@google.com>
Reviewed-by: Martin Kustermann <kustermann@google.com>
Static methods and constructors may receive unboxed parameters.
This change adds a bitmap to the RawFunction object indicating
which parameters are unboxed and their types. Also, the stack frame
bitmap was updated to include new bits for those parameters.
The ArgumentsDescriptor object was updated to store not only the number
of arguments, but also their size, since 32-bit platforms would use two
words for each int64 and double value.
In addition, static methods that return non-nullable integers
and doubles may return these values unboxed.
Dart AOT x64:
TypedData.Uint8ClampedListViewVarBench +11.73%
DeltaBlue +9.32%
Meteor (Intel Xeon) +4.64%
Flutter release android-armv8:
velocity_tracker_bench -2.32% (less is better)
flutter_gallery_readonlydata_size +0.18%
flutter_gallery_total_size +0.13%
flutter_gallery_instructions_size +0.12%
Issue https://github.com/dart-lang/sdk/issues/33549
Change-Id: I97e310f8f30213920af2333fbdedf193d03db5c3
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/135313
Commit-Queue: Victor Agnez Lima <victoragnez@google.com>
Reviewed-by: Martin Kustermann <kustermann@google.com>
dart-bytecode, arm64: +4.742% geomean
dart-bytecode-jit-unopt, arm64: +12.73% geomean
dart2js-compile, x64: +3.635% geomean
In the polymorphic and unlinked cases, call to a stub the does a linear scan against an ICData.
In the monomorphic case, call to a prologue of the expected target function that checks the expected receiver class. There is additional indirection in the JIT version compared to the AOT version to also tick a usage counter so the inliner can make good decisions.
In the megamorphic case, call to a stub that does a hash table lookup against a MegamorphicCache.
Megamorphic call sites face a loss of precision in usage counts. The call site count is not recorded and the usage counter of the target function is used as an approximation.
Monomorphic and megamorphic calls sites are reset to the polymorphic/unlinked state on hot reload.
Monomorphic and megamorphic calls sites do not check the stepping state, so they are reset to the polymorphic/unlinked state when stepping begins and disabled.
Back-edges now increment the usage counter in addition to checking it. This ensures function with loops containing monomorphic calls will eventually cross the optimization threshold.
Fixed backwards use of kMonomorphicEntryOffset and kPolymorphicEntryOffset.
Fixed C stack overflow when bouncing between the KBC interpreter and a simulator.
Bug: https://github.com/dart-lang/sdk/issues/26780
Bug: https://github.com/dart-lang/sdk/issues/36409
Bug: https://github.com/dart-lang/sdk/issues/36731
Change-Id: I78a49cccd962703a459288e71ce246ed845df474
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/102820
Commit-Queue: Ryan Macnak <rmacnak@google.com>
Reviewed-by: Alexander Markov <alexmarkov@google.com>
This reverts commit ade37f931e.
This re-lands RebindRule change with fixes for the "-mdebug--hot-reload" test failures.
Original commit is reverted in patch set 1.
Fixes are in following patch sets.
Bug:
Change-Id: I49375af9b891323fe05c670d77cbf880964aae54
Reviewed-on: https://dart-review.googlesource.com/9361
Reviewed-by: Vyacheslav Egorov <vegorov@google.com>
Commit-Queue: Alexander Aprelev <aam@google.com>
Change-Id: I6219462fed278dbb90361c2084eed886c9245097
Revert "Revert "Introduce inline cache reload rule attribute to static call AST node and ICData.""
This reverts commit 162283c2f3.
This re-lands the change with original revert in Patch set 1, actual bug fix in next patch set.
Bug:
Change-Id: I6219462fed278dbb90361c2084eed886c9245097
Reviewed-on: https://dart-review.googlesource.com/8760
Commit-Queue: Alexander Aprelev <aam@google.com>
Reviewed-by: Ryan Macnak <rmacnak@google.com>
This reverts commit 68a727fa5c.
Revert "Fix ICData::New() invocation. Follow-up to 68a727fa5cf5."
This reverts commit ac06b1c8ea.
Revert "Fix last ICData::New() invocation. Follow-up to 68a727fa5cf5."
This reverts commit da26ffc4de.
Bug:
Change-Id: Ia2d4e6a3c3a3a329982c90aded11e72bf25a9a34
Reviewed-on: https://dart-review.googlesource.com/8402
Reviewed-by: Alexander Aprelev <aam@google.com>
Commit-Queue: Alexander Aprelev <aam@google.com>
New folder structure (nested under vm/):
- compiler/
- jit/ - JIT specific code
- aot/ - AOT specific code
- backend/ - all middle-end and back-end code (IL, flow graph)
- assembler/ - assemblers and disassemblers
- frontend/ - front ends (AST -> IL, Kernel -> IL)
compiler/README.md would be the documentation root for the compiler
pipeline
Bug: https://github.com/dart-lang/sdk/issues/30575
Change-Id: I2dfd9688793bff737f7632ddc77fca766875ce36
Reviewed-on: https://dart-review.googlesource.com/2940
Reviewed-by: Vyacheslav Egorov <vegorov@google.com>
Commit-Queue: Vyacheslav Egorov <vegorov@google.com>
The call sequence is very similar to a classic IC call, except the guarded class and the target are loaded indirectly from the constant pool instead of as immediates. In the monomorphic case, we call directly to the expected target with a class check in the callee. In the unlinked, polymorphic and megamorphic cases, we call a stub; these case are now call-through instead of call-and-return.
Every code, except stubs involved in switchable calls, includes the class check sequence at the beginning. So we now distinguish between a checked and an unchecked entry point. Generated code except the switchable call continues to use the unchecked entry point.
PC offsets are calculated relative to the beginning of the instruction stream, rather than either entry point.
BUG=
R=fschneider@google.com
Review URL: https://codereview.chromium.org/2226893002 .
- [x] Add an is static call bit to ICData
- [x] Rewrite the reset ICData iterators to rely on that bit rather than the function's ic data map
BUG=
Review URL: https://codereview.chromium.org/2064693003 .
This is a cut of the work that Todd and I collaborated on in the reload branch.
In this CL, we've dropped the loader port hacks, in other words, on stack reloading in the standalone embedder does not work yet.
- [x] Support for hot reloading of isolate source code
- [x] Unit test harness and many tests
- [x] Service protocol and Observatory support
- [x] Product build does not include support for hot reloading.
R=rmacnak@google.com
Review URL: https://codereview.chromium.org/1965823002 .
- Use TokenDescriptor instead of intptr_t for all token positions.
- Use TokenDescriptor in raw_object instead of int32_t.
- TokenDescriptor is a POD with an int32_t (this shrinks the size of AST and IR nodes by 32-bits on 64-bit architectures).
There are some cleanups I plan on doing as a follow up CL:
- Replace TokenDescriptor::value() with TokenDescriptor::TokenPos()
R=iposva@google.com, rmacnak@google.com
Review URL: https://codereview.chromium.org/1644793002 .
- Rework token position address space.
- Use ClassifyingTokenPositions::kMethodExtractor for the token position of a method extractor.
- Plumb token positions through all of Ast Transformer.
- Plumb token positions for temporary expressions, etc in Flow Graph Builder.
- Add token positions for parts of the await machinery.
- Move ClassifyingTokenPositions into token.h.
- Remove default token position of Scanner::kNoSourcePos for many IR instructions.
- A couple of unit tests.
- Use synthetic token positions for synthetic AstNodes.
- Fix SLEB128 encoding / decoding + test
- s/Scanner::kNoSourcePos/Token::kNoSourcePos.
- Remove >= 0 and < 0 checks against token positions and use helpers instead.
R=rmacnak@google.com
Review URL: https://codereview.chromium.org/1589643002 .
This makes the code in the code generator independent from how stubs
are actually called (i.e. directly embedding the target address, or
indirectly by loading the target address from the code object).
BUG=
R=rmacnak@google.com
Review URL: https://codereview.chromium.org//1270803003 .
to all code emitting routines that may access the pool).
Improve code loading immediates on arm64 (do not read from the pool if 1 or 2
immediate instructions will do).
R=zra@google.com
Review URL: https://codereview.chromium.org//1264543002 .
This allows to make the last explicitly named stubs shared between isolates.
When sharing code stubs, we can't do patching at their entry anymore.
Therefore, I had to remove patching support of the array allocation stub.
Is this a functionality we want to keep?
The change is mostly performance-neutral because optimized code has an inlined fast
path for array allocation and only uses the stub for the slow-case.
The only isolate-specific stubs left are object allocation stubs which are
associated with their Class are per-isolate.
Since this CL removes any isolate-specific stubs from StubCode, it becomes AllStatic.
BUG=
R=koda@google.com
Review URL: https://codereview.chromium.org//1247783002 .
Ryan Macnak