Collect type feedback in the call bytecode handler. The current
implementation only collects feedback for JS function objects. The other
objects and Array functions do not collect any feedback. They will be
marked Megamorphic.
BUG=v8:4280, v8:4780
LOG=N
Review-Url: https://codereview.chromium.org/2122183002
Cr-Commit-Position: refs/heads/master@{#37700}
Converts FastNewClosureStub from a Hydrogen to a TurboFan code stub.
The plan is to start using this in the Interpreter CreateClosure
bytecode handler (in a follow-up CL).
BUG=v8:4280
Review-Url: https://codereview.chromium.org/2100883003
Cr-Commit-Position: refs/heads/master@{#37429}
Introduce a new machine operator Float64Pow that for now is backed by
the existing MathPowStub to start the unification of Math.pow, and at
the same time address the main performance issue that TurboFan still has
with the imaging-darkroom benchmark in Kraken.
Also migrate the Math.pow builtin itself to a TurboFan builtin and
remove a few hundred lines of hand-written platform code for special
handling of the fullcodegen Math.pow version.
BUG=v8:3599,v8:5086,v8:5157
Review-Url: https://codereview.chromium.org/2103733003
Cr-Commit-Position: refs/heads/master@{#37323}
Adds support for intrinsics which can be called as stubs. Namely:
- HasProperty
- MathPow
- NewObject
- NumberToString
- RegExpConstructResult
- RegExpExec
- Substring
- ToString
- ToName
- ToLength
- ToNumber
- ToObject
Also adds interface descriptors for stub calls which have arguments
passed on the stack.
BUG=v8:4280
LOG=N
Review-Url: https://codereview.chromium.org/2051573002
Cr-Commit-Position: refs/heads/master@{#37185}
The former will handle loads of predeclared global variables (vars and
functions), lets, consts and undeclared variables. The latter will handle
named loads from explicit receiver. In addition, named loads does not
depend of the TypeofMode.
TypeofMode related cleanup will be done in the follow-up CL.
BUG=chromium:576312
LOG=Y
TBR=bmeurer@chromium.org
Review-Url: https://codereview.chromium.org/1912633002
Cr-Commit-Position: refs/heads/master@{#36965}
In Crankshaft, we would install special ICs that didn't need a vector and slot
in the MEGAMORPHIC case. This optimization limits our hand against future
improvements.
BUG=
Review-Url: https://codereview.chromium.org/2019313003
Cr-Commit-Position: refs/heads/master@{#36597}
The previous approach taken by FastNew[Sloppy,Strict,Rest]ArgumentsStub
looked at the function slot in order to skip stub frames
and find the JS frame. However, stub frames do not have a
function slot (in fact their fixed frame ends one slot
before the JS frame's function slot). Therefore, if this
location in the stub frame happens to have the function
object the create arguments stubs won't skip this frame
correctly.
Replace this approach with one where the stub is
specialized to either skip a frame if required (since
there will only ever be one extra frame on Ignition
the loop approach isn't necessary).
BUG=v8:4928
LOG=N
CQ_INCLUDE_TRYBOTS=tryserver.v8:v8_linux_nosnap_dbg
Review-Url: https://codereview.chromium.org/1949023003
Cr-Commit-Position: refs/heads/master@{#36181}
This adds a new pass MemoryOptimizer that walks over the effect chain
from Start and lowers all Allocate, LoadField, StoreField, LoadElement,
and StoreElement nodes, trying to fold allocations into allocation
groups and eliminate write barriers on StoreField and StoreElement if
possible (i.e. if the object belongs to the current allocation group and
that group allocates in new space).
R=hpayer@chromium.org, jarin@chromium.org
BUG=v8:4931, chromium:580959
LOG=n
Review-Url: https://codereview.chromium.org/1963583004
Cr-Commit-Position: refs/heads/master@{#36128}
Code common with ObjectHasOwnProperty builtin was moved to CodeStubAssembler.
BUG=v8:2743
LOG=Y
Review-Url: https://codereview.chromium.org/1894953004
Cr-Commit-Position: refs/heads/master@{#35972}
Further refactor the pipeline to even run the first scheduler (part of
the effect control linearization) concurrently. This temporarily
disables most of the write barrier elimination, but we will get back to
that later.
Drive-by-fix: Remove the dead code from ChangeLowering, and stack
allocate the Typer in the pipeline. Also migrate the AllocateStub to a
native code builtin, so that we have the code object + a handle to it
available all the time.
CQ_INCLUDE_TRYBOTS=tryserver.v8:v8_linux64_tsan_rel
R=mstarzinger@chromium.org
BUG=v8:4969
LOG=n
Review-Url: https://codereview.chromium.org/1926023002
Cr-Commit-Position: refs/heads/master@{#35918}
Adds IncStub and DecStub TurboFan code stubs and hooks them up to the
interpreter's Inc and Dec bytecodes (which are used for count
operations, e.g. i++).
BUG=v8:4280
LOG=N
Review URL: https://codereview.chromium.org/1901083002
Cr-Commit-Position: refs/heads/master@{#35720}
This avoids custom compilation of receiver handlers for api getters.
BUG=
Review URL: https://codereview.chromium.org/1895093002
Cr-Commit-Position: refs/heads/master@{#35616}
This is a much cleaner solution, which won't require nearly as much
architecture-specific code. Thanks bmeurer@!
BUG=v8:4614
LOG=y
R=bmeurer@chromium.org,jarin@chromium.org
Review URL: https://codereview.chromium.org/1891033002
Cr-Commit-Position: refs/heads/master@{#35547}
Reland of (https://codereview.chromium.org/1617503003)
* New atomic code stubs for x64, ia32, arm, arm64
* Add convenience functions JumpIfNotValidSmiValue, JumpIfUintNotValidSmiValue
to macro-assembler-ia32 (API based on x64 macro assembler)
* Remove runtime implementation of Atomics.load, the code stub should always be
called instead
* Add new test to mjsunit atomics test; check that Smi values of different
sizes are supported when possible, else fall back to HeapNumbers
These changes were needed to add another codestub:
* Bump kStubMajorKeyBits from 7 to 8
* Reduce ScriptContextFieldStub::kSlotIndexBits from 13 to 12
BUG=v8:4614
LOG=y
TBR=jarin@chromium.org,bmeurer@chromium.org,rodolph.perfetta@gmail.com,machenbach@chromium.org
Review URL: https://codereview.chromium.org/1617503003
Cr-Commit-Position: refs/heads/master@{#35427}
Review URL: https://codereview.chromium.org/1881383003
Cr-Commit-Position: refs/heads/master@{#35453}
Reason for revert:
Needed to revert https://codereview.chromium.org/1617503003
Original issue's description:
> [stubs] Introduce LeftShift, SignedRightShift and UnsignedRightShift stubs.
>
> Add the stubs for JavaScript's '<<', '>>' and '>>>' operators and lets Ignition make use of them in the respective bytecode handlers.
>
> Committed: https://crrev.com/599369d6b8e1a5ccdca857def06eebcbacf47dd4
> Cr-Commit-Position: refs/heads/master@{#35433}
TBR=bmeurer@chromium.org,epertoso@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
Review URL: https://codereview.chromium.org/1880413002
Cr-Commit-Position: refs/heads/master@{#35444}
Reason for revert:
[Sheriff] Roll was reverted. Please fix unused methods, see:
https://codereview.chromium.org/1884913002/https://build.chromium.org/p/tryserver.chromium.win/builders/win_clang/builds/5585/steps/compile%20%28with%20patch%29/logs/stdio
Original issue's description:
> [Atomics] code stubs for atomic operations
>
> * New atomic code stubs for x64, ia32, arm, arm64
> * Add convenience functions JumpIfNotValidSmiValue, JumpIfUintNotValidSmiValue
> to macro-assembler-ia32 (API based on x64 macro assembler)
> * Remove runtime implementation of Atomics.load, the code stub should always be
> called instead
> * Add new test to mjsunit atomics test; check that Smi values of different
> sizes are supported when possible, else fall back to HeapNumbers
>
> These changes were needed to add another codestub:
> * Bump kStubMajorKeyBits from 7 to 8
> * Reduce ScriptContextFieldStub::kSlotIndexBits from 13 to 12
>
> BUG=v8:4614
> LOG=y
>
> Committed: https://crrev.com/10b5febe11b318cfef130abae343183ac862e60d
> Cr-Commit-Position: refs/heads/master@{#35427}
TBR=jarin@chromium.org,bmeurer@chromium.org,rodolph.perfetta@gmail.com,binji@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=v8:4614
Review URL: https://codereview.chromium.org/1884883003
Cr-Commit-Position: refs/heads/master@{#35443}
Add the stubs for JavaScript's '<<', '>>' and '>>>' operators and lets Ignition make use of them in the respective bytecode handlers.
Review URL: https://codereview.chromium.org/1881003002
Cr-Commit-Position: refs/heads/master@{#35433}
* New atomic code stubs for x64, ia32, arm, arm64
* Add convenience functions JumpIfNotValidSmiValue, JumpIfUintNotValidSmiValue
to macro-assembler-ia32 (API based on x64 macro assembler)
* Remove runtime implementation of Atomics.load, the code stub should always be
called instead
* Add new test to mjsunit atomics test; check that Smi values of different
sizes are supported when possible, else fall back to HeapNumbers
These changes were needed to add another codestub:
* Bump kStubMajorKeyBits from 7 to 8
* Reduce ScriptContextFieldStub::kSlotIndexBits from 13 to 12
BUG=v8:4614
LOG=y
Review URL: https://codereview.chromium.org/1617503003
Cr-Commit-Position: refs/heads/master@{#35427}
Otherwise they can't be found in the megamorphic cache, leading to repeated misses.
BUG=chromium:596825
LOG=n
Review URL: https://codereview.chromium.org/1874303002
Cr-Commit-Position: refs/heads/master@{#35393}
Adds a ModulusStub for the modulo operator and lets TurboFan and Ignition make use of it.
Review URL: https://codereview.chromium.org/1876793002
Cr-Commit-Position: refs/heads/master@{#35389}
Adds a DivideStub for the division operator and hooks it up with TurboFan and Ignition.
Review URL: https://codereview.chromium.org/1865293003
Cr-Commit-Position: refs/heads/master@{#35364}
Adds a MultiplyStub for the multiplication operator and hooks it with TurboFan and Ignition.
Currently, the SMI times SMI case is handled by converting both the operands to double precision floating points, we may consider adding a fast path later.
Review URL: https://codereview.chromium.org/1860043002
Cr-Commit-Position: refs/heads/master@{#35287}
Introduce a ResumeGeneratorTrampoline, which does the actual stack state
reconstruction (currently always restores a fullcodegen frame), and
introduce appropriate TurboFan builtins for %GeneratorPrototype%.next,
%GeneratorPrototype%.return and %GeneratorPrototype%.throw based on
this native builtin.
Also unify the flooding in case of step-in to always work based on
JSFunction and remove the special casing for JSGeneratorObject.
R=mstarzinger@chromium.org, neis@chromium.orgTBR=rossberg@chromium.org
BUG=chromium:513471
LOG=n
Review URL: https://codereview.chromium.org/1865833002
Cr-Commit-Position: refs/heads/master@{#35283}
This adds a new TurboFan-based ToIntegerStub, similar to the
ToLengthStub, and uses it whereever we had custom code for %_ToInteger
previously.
R=yangguo@chromium.org
BUG=v8:4587
LOG=n
Review URL: https://codereview.chromium.org/1846683006
Cr-Commit-Position: refs/heads/master@{#35190}
This adds two new stubs, AddStub and SubtractStub, for the plus and the
minus operators, and hooks them up with TurboFan and Ignition.
Especially the addition case is very heavy and we might want to look
into splitting that up further into specialized stubs (similar to what
we did with ToNumberStub recently).
R=epertoso@chromium.org
Review URL: https://codereview.chromium.org/1823083002
Cr-Commit-Position: refs/heads/master@{#34994}
Split ToNumberStub into the entry ToNumberStub, and two new stubs,
StringToNumberStub and NonNumberToNumberStub, which can be used when we
already know something about the input (i.e. in various branches of the
code stubs, or in TurboFan graphs).
Also introduce an appropriate StringToNumber simplified operator for
TurboFan, that is pure and is lowered to an invocation of the newly
added StringToNumberStub.
R=jarin@chromium.org
Review URL: https://codereview.chromium.org/1818923002
Cr-Commit-Position: refs/heads/master@{#34922}
Add EqualStub and NotEqualStub, based on the CodeStubAssembler, and hook
them up with TurboFan and Ignition. The stubs are a full implementation
of abstract equality for ES6 plus the current SIMD.js draft, unlike the
generic version of the CompareIC, which only implements a subset with
funky runtime fallbacks.
Drive-by-fix: Introduce some common helper methods.
R=epertoso@chromium.org
BUG=chromium:592690
LOG=n
Review URL: https://codereview.chromium.org/1795793002
Cr-Commit-Position: refs/heads/master@{#34806}
HInvokeFunction and HApplyArguments instructions now support tail calling.
Inlining of calls at tail position is not supported yet and therefore still disabled.
The tail-call-megatest was modified so that the usages of "arguments" object do not disable Crankshaft.
TBR=bmeurer@chromium.org
BUG=v8:4698
LOG=N
Review URL: https://codereview.chromium.org/1760253003
Cr-Commit-Position: refs/heads/master@{#34542}
Add StringLessThanStub, StringLessThanOrEqualStub, StringGreaterThanStub
and StringGreaterThanOrEqualStub, based on the CodeStubAssembler, and
hook them up with TurboFan (and Ignition). The stubs are currently
essentially comparable with the StringCompareStub, which is now
obsolete. We can later extend these stubs to cover more interesting
cases (i.e. two byte sequential string comparisons, etc.).
R=epertoso@chromium.org
Review URL: https://codereview.chromium.org/1765823002
Cr-Commit-Position: refs/heads/master@{#34485}
This adds new code stubs for abstract relational comparison,
namely LessThanStub, LessThanOrEqualStub, GreaterThanStub and
GreaterThanOrEqualStub, and hooks them up for Ignition and TurboFan.
These stubs implement the full compare operation without any
unpredictable bailouts. Currently they still go to C++ for string
comparisons, and also use the %ToPrimitive_Number runtime entry, as
we still lack a stub for the ToPrimitive operation. These issues
will be addressed separately in follow-up CLs.
Drive-by-fix: Add support for deferred code in the RawMachineAssembler
and CodeStubAssembler. A block can be marked as deferred by marking its
Label as deferred, which will then make the register allocator penalize
this block and prefer better register assignments for the other blocks.
R=epertoso@chromium.org
Review URL: https://codereview.chromium.org/1759133002
Cr-Commit-Position: refs/heads/master@{#34463}
These new stubs perform exactly the same job as the string equality case
for the CompareIC, but are platform independent and usable outside of
fullcodegen and Crankshaft. We use them in the StrictEqualStub and the
StrictNotEqualStub instead of falling back to the runtime immediately
for String comparisons, and we also use them in TurboFan to perform
String equality or inequality comparisons.
These stubs currently handle only internalized and one byte strings w/o
going to C++, but it should be easy to add support for more string cases
later, i.e. utilizing already flattened cons strings or comparing two
byte strings as well.
Review URL: https://codereview.chromium.org/1761823002
Cr-Commit-Position: refs/heads/master@{#34459}
Generalize the code that we have for StrictEqualStub to also general a
StrictNotEqualStub and hook that up with TurboFan and Ignition. It's
still falling back to the runtime for every String (in)equality check.
R=yangguo@chromium.org
Review URL: https://codereview.chromium.org/1756793002
Cr-Commit-Position: refs/heads/master@{#34426}
Initial version of a new StrictEqualStub written as TurboFan code stub,
that implements the full strict equality comparison and is usable for
both TurboFan and Ignition (and soon for the generic CompareIC case
too). The stub is not fully optimized yet, i.e. we still go to the
runtime for string comparisons, but that'll be addressed in a follow-up
CL.
R=yangguo@chromium.org
Review URL: https://codereview.chromium.org/1753173003
Cr-Commit-Position: refs/heads/master@{#34423}
Reason for revert:
It is not a good idea to call CallICStub from the builtin. It might be sensitive to the frame structure. Constructing a internal frame might cause problems. It is much better to inline the code related to the type feedback vector into the builtin.
Original issue's description:
> [Interpreter] Implements calls through CallICStub in the interpreter.
>
> Calls are implemented through CallICStub to collect type feedback. Adds
> a new builtin called InterpreterPushArgsAndCallIC that pushes the
> arguments onto stack and calls CallICStub.
>
> Also adds two new bytecodes CallIC and CallICWide to indicate calls have to
> go through CallICStub.
>
> MIPS port contributed by balazs.kilvady.
>
> BUG=v8:4280, v8:4680
> LOG=N
>
> Committed: https://crrev.com/20362a2214c11a0f2ea5141b6a79e09458939cec
> Cr-Commit-Position: refs/heads/master@{#34244}
TBR=rmcilroy@chromium.org,mvstanton@chromium.org,mstarzinger@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=v8:4280, v8:4680
Review URL: https://codereview.chromium.org/1731253003
Cr-Commit-Position: refs/heads/master@{#34252}
Calls are implemented through CallICStub to collect type feedback. Adds
a new builtin called InterpreterPushArgsAndCallIC that pushes the
arguments onto stack and calls CallICStub.
Also adds two new bytecodes CallIC and CallICWide to indicate calls have to
go through CallICStub.
MIPS port contributed by balazs.kilvady.
BUG=v8:4280, v8:4680
LOG=N
Review URL: https://codereview.chromium.org/1688283003
Cr-Commit-Position: refs/heads/master@{#34244}
Move the already existing fast case for %NewObject into a dedicated
FastNewObjectStub that we can utilize in places where we would otherwise
fallback to %NewObject immediately, which is rather expensive.
Also use FastNewObjectStub as the generic implementation of JSCreate,
which should make constructor inlining based on SharedFunctionInfo (w/o
specializing to a concrete closure) viable soon.
R=jarin@chromium.org
Review URL: https://codereview.chromium.org/1708313002
Cr-Commit-Position: refs/heads/master@{#34136}
This CL introduces two new bytecodes TailCall and TailCallWide.
BUG=v8:4698,v8:4687
LOG=N
Review URL: https://codereview.chromium.org/1698273003
Cr-Commit-Position: refs/heads/master@{#34083}
Turn the fast case of ArgumentsAccessStub into a new stub
FastNewSloppyArgumentsStub, which is similar to the existing
FastNewStrictArgumentsStub, although not polished yet, and the slow
case always went to the runtime anyway, so we can just directly emit
a runtime call there.
R=mstarzinger@chromium.org
Committed: https://crrev.com/55b0b4f6d572531eec00ab6ebd8f6feb7c584e04
Cr-Commit-Position: refs/heads/master@{#33973}
Review URL: https://codereview.chromium.org/1695633003
Cr-Commit-Position: refs/heads/master@{#33986}
Turn the fast case of ArgumentsAccessStub into a new stub
FastNewSloppyArgumentsStub, which is similar to the existing
FastNewStrictArgumentsStub, although not polished yet, and the slow
case always went to the runtime anyway, so we can just directly emit
a runtime call there.
R=mstarzinger@chromium.org
Review URL: https://codereview.chromium.org/1695633003
Cr-Commit-Position: refs/heads/master@{#33973}
The FastNewStrictArgumentsStub is very similar to the recently added
FastNewRestParameterStub, it's actually almost a copy of it, except that
it doesn't have the fast case we have for the empty rest parameter. This
patch improves strict arguments in TurboFan and fullcodegen by up to 10x
compared to the previous version.
Also introduce proper JSSloppyArgumentsObject and JSStrictArgumentsObject
for the in-object properties instead of having them as constants in the
Heap class.
Drive-by-fix: Use this stub and the FastNewRestParameterStub in the
interpreter to avoid the runtime call overhead for strict arguments
and rest parameter creation.
R=jarin@chromium.orgTBR=mstarzinger@chromium.org
Review URL: https://codereview.chromium.org/1693513002
Cr-Commit-Position: refs/heads/master@{#33925}
