This is the next step towards preventing compiler from directly peeking
into runtime and instead interact with runtime through a well defined
surface. The goal of the refactoring to locate all places where compiler
accesses some runtime information and partion those accesses into two
categories:
- creating objects in the host runtime (e.g. allocating strings, numbers, etc)
during compilation;
- accessing properties of the target runtime (e.g. offsets of fields) to
embed those into the generated code;
This change introduces dart::compiler and dart::compiler::target namespaces.
All code in the compiler will gradually be moved into dart::compiler namespace.
One of the motivations for this change is to be able to prevent access to
globally defined host constants like kWordSize by shadowing them in the
dart::compiler namespace.
The nested namespace dart::compiler::target hosts all information about
target runtime that compiler could access, e.g. compiler::target::kWordSize
defines word size of the target which will eventually be made different
from the host kWordSize (defined by dart::kWordSize).
The API for compiler to runtime interaction is placed into compiler_api.h.
Note that we still permit runtime to access compiler internals directly -
this is not going to be decoupled as part of this work.
Issue https://github.com/dart-lang/sdk/issues/31709
Change-Id: If4396d295879391becfa6c38d4802bbff81f5b20
Reviewed-on: https://dart-review.googlesource.com/c/90242
Commit-Queue: Vyacheslav Egorov <vegorov@google.com>
Reviewed-by: Martin Kustermann <kustermann@google.com>
Also do the same for the unsafe version of StoreIndexed.
Similar to the inliner, we may replace calls in the specializers with
these non-definition instructions, so we make variants that allow an
unrelated value to be used for the old users of the call site value. (In
all cases, this ends up being null, since the original calls wouldn't
have returned a useable value anyway.)
Change-Id: I0befd54920c4c0e63e086b804860ee4c9a7d3767
Reviewed-on: https://dart-review.googlesource.com/c/89585
Reviewed-by: Martin Kustermann <kustermann@google.com>
Commit-Queue: Stevie Strickland <sstrickl@google.com>
This reverts commit a8777149a7.
Reason for revert: benchmarking infrastructure reports broken benchmarks on ARM.
Original change's description:
> [VM/Compiler] Revoke definition status of certain instructions.
>
> Change StoreIndexed, StoreIndexedUnsafe, and StoreInstanceField
> to be non-definition instructions. Fix up the flow graph builders
> so they no longer treat StoreIndexed and StoreIndexedUnsafe as
> pushing values on the stack that need to be dropped.
>
> We recently changed FlowGraphInliner::TryInlineRecognizedMethod
> to create a distinction between the last instruction to be inlined
> and the definition that should be used as the new result. Perform
> the same separation of replacement code and result in the call
> specializers.
>
> Change-Id: I66c7ab60a662dcca05092e47156d1d4ba809d51f
> Reviewed-on: https://dart-review.googlesource.com/c/88326
> Commit-Queue: Stevie Strickland <sstrickl@google.com>
> Reviewed-by: Martin Kustermann <kustermann@google.com>
TBR=kustermann@google.com,sstrickl@google.com
Change-Id: I9c666d80a69ba6a5c37b421aae1ed83502694f19
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Reviewed-on: https://dart-review.googlesource.com/c/89366
Reviewed-by: Vyacheslav Egorov <vegorov@google.com>
Commit-Queue: Vyacheslav Egorov <vegorov@google.com>
Change StoreIndexed, StoreIndexedUnsafe, and StoreInstanceField
to be non-definition instructions. Fix up the flow graph builders
so they no longer treat StoreIndexed and StoreIndexedUnsafe as
pushing values on the stack that need to be dropped.
We recently changed FlowGraphInliner::TryInlineRecognizedMethod
to create a distinction between the last instruction to be inlined
and the definition that should be used as the new result. Perform
the same separation of replacement code and result in the call
specializers.
Change-Id: I66c7ab60a662dcca05092e47156d1d4ba809d51f
Reviewed-on: https://dart-review.googlesource.com/c/88326
Commit-Queue: Stevie Strickland <sstrickl@google.com>
Reviewed-by: Martin Kustermann <kustermann@google.com>
Dispatch interface calls via hashtable rather than inline cache.
InterfaceCall doesn't need to take arguments descriptor into account
when doing method lookup.
Change-Id: I30eae6ea638d1d2ad2cf3ff073c653fee3377f31
Reviewed-on: https://dart-review.googlesource.com/c/86106
Reviewed-by: Zach Anderson <zra@google.com>
Commit-Queue: Régis Crelier <regis@google.com>
This CL adds context ID operand to AllocateContext, CloneContext,
LoadContextVar and StoreContextVar bytecode instructions.
The context ID will be used to create distinct Slots and disambiguate
accesses to context objects corresponding to different scopes.
Change-Id: I98850ab763017b71c1dcacfccaffc085bd850e00
Reviewed-on: https://dart-review.googlesource.com/c/84681
Auto-Submit: Alexander Markov <alexmarkov@google.com>
Commit-Queue: Régis Crelier <regis@google.com>
Reviewed-by: Régis Crelier <regis@google.com>
Make StoreIntanceField and LoadField instructions use a single uniform
abstraction: Slot (used to be called NativeFieldDesc), which represents
either a real Dart field (i.e. a field that has a corresponding Field object)
or a native VM field that does not have a corresponding Field object.
This refactoring eliminates raw stores/loads that were just using offsets
before - now we always know what kind of slots we are accessing and
this yields better aliasing information.
Change-Id: I2f48332d58258219565bd961764e8cc9dd4d75ce
Reviewed-on: https://dart-review.googlesource.com/c/74582
Commit-Queue: Vyacheslav Egorov <vegorov@google.com>
Reviewed-by: Alexander Markov <alexmarkov@google.com>
In order to enable OSR, CheckStackOverflow IL instructions are attributed
with a non-zero loop depth. The original loop depth is passed as operand
of CheckStack bytecode instruction.
Change-Id: I771f59ba9f8d071680a3b7156be380e0f606b7b2
Reviewed-on: https://dart-review.googlesource.com/c/84081
Reviewed-by: Régis Crelier <regis@google.com>
Commit-Queue: Alexander Markov <alexmarkov@google.com>
Previously MoveSpecial bytecode instruction used unsigned 8-bit A field
to encode target local variable index. This is too restrictive as we allow
signed 16-bit local variable indices.
After this change MoveSpecial has A_X encoding, with A field used for
special index (0 or 1), and signed 16-bit X field used for target local.
Change-Id: Ib87992e192b2923a39a9968913c39476947d3ea5
Reviewed-on: https://dart-review.googlesource.com/c/81440
Commit-Queue: Alexander Markov <alexmarkov@google.com>
Commit-Queue: Régis Crelier <regis@google.com>
Reviewed-by: Régis Crelier <regis@google.com>
Auto-Submit: Alexander Markov <alexmarkov@google.com>
Similar to how we treat catch entry instructions, this cl adds new
function and osr entry instructions. The [FunctionEntry] and
[OsrEntry] - just like [CatchBlockEntry] - have now their own initial
definitions. The [GraphEntry] has only initial definitions for
constants.
Explicit phis are inserted for all parameter / special parameter
instructions if necessary.
Future work is:
a) Minimize parallel moves due to the phis on parameters
b) Cleanup frame setup: Move it entirely into FunctionEntry/CatchEntry
(instead of the split version we have now)
Fixes https://github.com/dart-lang/sdk/issues/34435
Fixes https://github.com/dart-lang/sdk/issues/34287
Change-Id: Iefa0280a709716f748d6fb0523b8d0f4d8de1fec
Reviewed-on: https://dart-review.googlesource.com/c/74782
Commit-Queue: Martin Kustermann <kustermann@google.com>
Reviewed-by: Vyacheslav Egorov <vegorov@google.com>
The new argument order matches the runtime call and requires less copying.
Simplify Function::HasCode()
Remove obsolete workaround when updating type test cache.
Change-Id: I57c988f97ee2259a22730f445f336cd2a085959e
Reviewed-on: https://dart-review.googlesource.com/76584
Commit-Queue: Régis Crelier <regis@google.com>
Reviewed-by: Alexander Markov <alexmarkov@google.com>
These bytecode instructions are added in order to shrink constant pools
and reduce time spent for reading constant pool entries.
Change-Id: I8522f73dc7a6236969ac0422c6cb89b945559b2d
Reviewed-on: https://dart-review.googlesource.com/75125
Reviewed-by: Zach Anderson <zra@google.com>
Commit-Queue: Alexander Markov <alexmarkov@google.com>
Vyacheslav Egorov