Port the Call feedback machinery from the interpreter to the CallICStub
as second step to unify the feedback collection. This removes a lot of
hand-written native code, and makes the runtime miss handler obsolete.
The next step will be to use the CallICStub from the interpreter as
well.
Drive-by-fix: Adjust CallIC/CallICTrampoline descriptors names.
R=mvstanton@chromium.org
BUG=v8:5049
Review-Url: https://codereview.chromium.org/2670843002
Cr-Commit-Position: refs/heads/master@{#42889}
Rename the CallIC factory method to CallICTrampoline and the
CallICInOptimizedCode to CallIC to match the naming of the
stubs and better reflect their functionality.
R=yangguo@chromium.org
Review-Url: https://codereview.chromium.org/2670073002
Cr-Commit-Position: refs/heads/master@{#42876}
Previously, when restarting a frame, we would rewrite all frames
between the debugger activation and the frame to restart to squash
them, and replace the return address with that of a builtin to
leave that rewritten frame, and restart the function by calling it.
We now simply remember the frame to drop to, and upon returning
from the debugger, we check whether to drop the frame, load the
new FP, and restart the function.
R=jgruber@chromium.org, mstarzinger@chromium.org
BUG=v8:5587
Review-Url: https://codereview.chromium.org/2636913002
Cr-Commit-Position: refs/heads/master@{#42725}
We turn a JSCallFunction node for
f.apply(receiver, arguments)
into a JSCallForwardVarargs node, when the arguments refers to the
arguments of the outermost optimized code object, i.e. not an inlined
arguments, and the apply method refers to Function.prototype.apply,
and there's no other user of arguments except in frame states.
We also replace the arguments node in the graph with a marker for
the Deoptimizer similar to Crankshaft to make sure we don't materialize
unused arguments just for the sake of deoptimization. We plan to replace
this with a saner EscapeAnalysis based solution soon.
R=jarin@chromium.org
BUG=v8:5267,v8:5726
Review-Url: https://codereview.chromium.org/2655233002
Cr-Commit-Position: refs/heads/master@{#42680}
We can share almost all of the architecture-specific builtin code with super-call-with-spread.
Info to port-writers: The code in CheckSpreadAndPushToStack has changed slightly from what was in Generate_ConstructWithSpread, in that we take the length of the spreaded parameters from the JSArray rather than the FixedArray backing store.
BUG=v8:5511
Review-Url: https://codereview.chromium.org/2649143002
Cr-Commit-Position: refs/heads/master@{#42632}
The %_ClassOf intrinsic roughly corresponds to the deprecated ES5
[[Class]] internal property, and should not be used anymore ideally.
However since we still have quite a couple of uses of this intrinsic
in the self hosted JavaScript builtins, we would tank some builtins
like Map, Set, WeakMap, WeakSet, etc. quite significantly unless we
also support this intrinsic until the builtins are all migrated to
C++/CSA builtins.
R=yangguo@chromium.org
BUG=v8:5267
Review-Url: https://codereview.chromium.org/2647833004
Cr-Commit-Position: refs/heads/master@{#42530}
- builtins-ic.cc takes the place of the AccessorAssembler shim
- AccessorAssemblerImpl can then be renamed
- some cleanup in code-factory.cc
- drop old _TF name suffixes
- fix Generate##Name##Impl in TF_BUILTIN macro
Review-Url: https://codereview.chromium.org/2647493002
Cr-Commit-Position: refs/heads/master@{#42520}
Most notably, the interpreter now calls this stub instead of the
runtime.
BUG=
Review-Url: https://codereview.chromium.org/2619163004
Cr-Commit-Position: refs/heads/master@{#42218}
Introduce a dedicated StringCharCodeAt builtin, that performs the core
logic of String.prototype.charCodeAt and lower the StringCharCodeAt
simplified operator to a call to this builtin rather than inlining the
full functionality into each and every TurboFan graph using it. This can
significantly reduce compile time in some cases (i.e. can easily shave
off over 50% of compile time overhead for small functions that call
String.prototype.charCodeAt).
Currently it returns the char code as TaggedSigned value, but
middle-term we should make it possible to return untagged values
from builtins.
R=yangguo@chromium.org
Review-Url: https://codereview.chromium.org/2600443002
Cr-Commit-Position: refs/heads/master@{#41912}
Previously String element access and String.prototype.charAt were
lowered to a subgraph StringFromCharCode(StringCharCodeAt(s, k)),
however that can be fairly expensive both runtime and compile time
wise. The dedicated StringCharAt operator is implemented via a call
to a builtin that does exactly this.
R=yangguo@chromium.org
Review-Url: https://codereview.chromium.org/2599683002
Cr-Commit-Position: refs/heads/master@{#41909}
eval() may introduce a scope which needs to be represented as a context at
runtime, e.g.,
eval('var x; let y; ()=>y')
introduces a variable y which needs to have a context allocated for it. However,
when traversing upwards to find the declaration context for a variable which leaks,
as the declaration of x does above, this context has to be understood to not be
a declaration context in sloppy mode.
This patch makes that distinction by introducing a different map for eval-introduced
contexts. A dynamic search for the appropriate context will continue past an eval
context to find the appropriate context. Marking contexts as eval contexts rather
than function contexts required updates in each compiler backend.
BUG=v8:5295, chromium:648719
Review-Url: https://codereview.chromium.org/2435023002
Cr-Commit-Position: refs/heads/master@{#41869}
This is so that a NotSuperConstructor error is thrown before evaluating the
arguments to the super constructor. Besides updating the runtime function, a
new bytecode GetSuperConstructor is introduced.
BUG=v8:5336
Review-Url: https://codereview.chromium.org/2504553003
Cr-Commit-Position: refs/heads/master@{#41788}
.. by using variadic templates in CodeAssembler and RawMachineAssembler.
BUG=
Review-Url: https://codereview.chromium.org/2580823002
Cr-Commit-Position: refs/heads/master@{#41733}
Splits PromiseHandle into two TF builtins to account for catch
prediction. An exception in PromiseHandleReject builtin results in a
"caught" prediction whereas an expception in PromiseHandle results in a
"promise rejection" prediction.
An extra is_exception_caught bit is added to Code to mark this catch
prediction behavior.
BUG=v8:5343
Review-Url: https://codereview.chromium.org/2572623002
Cr-Commit-Position: refs/heads/master@{#41683}
First step towards making arguments and rest parameters optimizable by
splitting the allocations for the actual object and the elements. The
object allocations can already be escape analyzed this way, the elements
would need special support in the deoptimizer and the escape analysis,
but that can be done as a second separate step.
R=jarin@chromium.org
BUG=v8:5726
Review-Url: https://codereview.chromium.org/2557283002
Cr-Commit-Position: refs/heads/master@{#41573}
Improves performance in simple, single element case by 5% and in multiple
elements cases by 2%.
BUG=chromium:608675
LOG=N
Review-Url: https://codereview.chromium.org/2497243002
Cr-Commit-Position: refs/heads/master@{#41368}
This is the TurboFan counterpart of http://crrev.com/2504263004, but it
is a bit more involved, since in TurboFan we always inline the appropriate
call to the @@hasInstance handler, and by that we can optimize a lot more
patterns of instanceof than Crankshaft, and even yield fast instanceof
for custom @@hasInstance handlers (which we can now properly inline as
well).
Also we now properly optimize Function.prototype[@@hasInstance], even if
the right hand side of an instanceof doesn't have the Function.prototype
as its direct prototype.
For the baseline case, we still rely on the global protector cell, but
we can address that in a follow-up as well, and make it more robust in
general.
TEST=mjsunit/compiler/instanceof
BUG=v8:5640
R=yangguo@chromium.org
Review-Url: https://codereview.chromium.org/2511223003
Cr-Commit-Position: refs/heads/master@{#41092}
This CL removes code that is now unused since the port of regexp.js has been
completed. Removed functions / classes are:
* regexp.js (GetSubstitution moved to string.js)
* RegExpConstructResult stub
* RegExpFlags intrinsic
* RegExpSource intrinsic
* RegExpInitializeAndCompile runtime function
BUG=v8:5339
Review-Url: https://codereview.chromium.org/2448463002
Cr-Commit-Position: refs/heads/master@{#40547}
This is the next step to unify the Call/Construct feedback collection
and prepare it to be able to collect SharedFunctionInfo feedback. This
also reduces the CallICStub overhead quite a bit since we only need one
stub per mode (and tail call mode), not also one per call arity.
R=mvstanton@chromium.org
BUG=v8:2206
NOTRY=true
Review-Url: https://codereview.chromium.org/2412453005
Cr-Commit-Position: refs/heads/master@{#40206}
Adds support to collect allocation site feedback for Array function calls
to the call bytecode handler.
BUG=v8:4280, v8:4780
LOG=N
Review-Url: https://codereview.chromium.org/2307903002
Cr-Commit-Position: refs/heads/master@{#39283}
Collect type feedback in the bytecode handler for 'new' bytecode. The
earlier cl (https://codereview.chromium.org/2153433002/) was reverted
because that implementation did not collect allocation site feedback.
This regressed delta blue by an order of magnitude. This implementation
includes collection of allocation site feedback.
Reland of https://codereview.chromium.org/2190293003/ with a bug fix.
BUG=v8:4280, v8:4780
LOG=N
Review-Url: https://codereview.chromium.org/2225923003
Cr-Commit-Position: refs/heads/master@{#39120}
Introduce a dedicated MaybeGrowFastElements simplified operator, which
tries to grow a fast elements backing store for a given element that
should be added to an array/object. Use that to lower a growing keyed
store to a sequence of
1) check index is a valid array index,
2) check stored value,
3) maybe grow elements backing store (and deoptimize if it would
normalize), and
4) store the actual element.
The actual growing is done by two dedicated GrowFastDoubleElements
and GrowFastSmiOrObjectElements builtins, which are very similar to
the GrowArrayElementsStub that is used by Crankshaft.
Drive-by-fix: Turn CopyFixedArray into CopyFastSmiOrObjectElements
builtin, similar to the new growing builtins, so we don't need to
inline the store+write barrier for the elements into all optimized
code objects anymore.
Also fix a bug in the OperationTyper for NumberSilenceNaN, which was
triggered by this change.
BUG=v8:5272
Review-Url: https://codereview.chromium.org/2227493002
Cr-Commit-Position: refs/heads/master@{#38418}
This extends JSNativeContextSpecialization with support for stores to
fast object/smi element backing stores that are marked as copy-on-write.
In this case we first call the CopyFixedArray builtin to take a copy of
the elements backing store, and then store the new elements back to the
object, and finally perform the actual element store.
R=epertoso@chromium.org
BUG=v8:4470
Committed: https://crrev.com/ac98ad22f049a59c48387f1bab1590f135d219c6
Review-Url: https://codereview.chromium.org/2218703003
Cr-Original-Commit-Position: refs/heads/master@{#38370}
Cr-Commit-Position: refs/heads/master@{#38392}
Reason for revert:
Breaks tree?
Original issue's description:
> [turbofan] Add support for copy-on-write element stores.
>
> This extends JSNativeContextSpecialization with support for stores to
> fast object/smi element backing stores that are marked as copy-on-write.
> In this case we first call the CopyFixedArray builtin to take a copy of
> the elements backing store, and then store the new elements back to the
> object, and finally perform the actual element store.
>
> R=epertoso@chromium.org
> BUG=v8:4470
>
> Committed: https://crrev.com/ac98ad22f049a59c48387f1bab1590f135d219c6
> Cr-Commit-Position: refs/heads/master@{#38370}
TBR=epertoso@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=v8:4470
Review-Url: https://codereview.chromium.org/2220513002
Cr-Commit-Position: refs/heads/master@{#38376}
This extends JSNativeContextSpecialization with support for stores to
fast object/smi element backing stores that are marked as copy-on-write.
In this case we first call the CopyFixedArray builtin to take a copy of
the elements backing store, and then store the new elements back to the
object, and finally perform the actual element store.
R=epertoso@chromium.org
BUG=v8:4470
Review-Url: https://codereview.chromium.org/2218703003
Cr-Commit-Position: refs/heads/master@{#38370}
Reason for revert:
[Sheriff] Fails on nosnap debug:
https://build.chromium.org/p/client.v8/builders/V8%20Linux%20-%20nosnap%20-%20debug/builds/8403
Original issue's description:
> [Interpreter] Collect type feedback for 'new' in the bytecode handler
>
> Collect type feedback in the bytecode handler for 'new' bytecode. The
> earlier cl (https://codereview.chromium.org/2153433002/) was reverted
> because that implementation did not collect allocation site feedback.
> This regressed delta blue by an order of magnitude. This implementation
> includes collection of allocation site feedback.
>
> BUG=v8:4280, v8:4780
> LOG=N
>
> Committed: https://crrev.com/9d5e6129c4c7f9cbfe81a5fad2a470f219fe137c
> Cr-Commit-Position: refs/heads/master@{#38364}
TBR=bmeurer@chromium.org,rmcilroy@chromium.org,balazs.kilvady@imgtec.com,mythria@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=v8:4280, v8:4780
Review-Url: https://codereview.chromium.org/2212343002
Cr-Commit-Position: refs/heads/master@{#38368}
Collect type feedback in the bytecode handler for 'new' bytecode. The
earlier cl (https://codereview.chromium.org/2153433002/) was reverted
because that implementation did not collect allocation site feedback.
This regressed delta blue by an order of magnitude. This implementation
includes collection of allocation site feedback.
BUG=v8:4280, v8:4780
LOG=N
Review-Url: https://codereview.chromium.org/2190293003
Cr-Commit-Position: refs/heads/master@{#38364}
This will enable the interpreter to add a bytecode and use the stub.
BUG=v8:4280
LOG=n
Review-Url: https://codereview.chromium.org/2177273002
Cr-Commit-Position: refs/heads/master@{#38219}
Reason for revert:
Fix has been landed.
Original issue's description:
> Revert of [interpreter] Add explicit OSR polling bytecode. (patchset #6 id:100001 of https://codereview.chromium.org/2172233002/ )
>
> Reason for revert:
> Bunch of breakages. Maybe bad interaction with e520e5da55 ?
>
> E.g.:
> https://build.chromium.org/p/client.v8/builders/V8%20Linux64/builds/11607
>
> Original issue's description:
> > [interpreter] Add explicit OSR polling bytecode.
> >
> > This adds an explicit {OsrPoll} bytecode into every loop header which
> > triggers on-stack replacement when armed. Note that each such bytecode
> > stores the static loop depths as an operand, and hence can be armed for
> > specific loop depths.
> >
> > This also adds builtin code that triggers OSR compilation and switches
> > execution over to optimized code in case compilation succeeds. In case
> > compilation fails, the bytecode dispatch just continues unhindered.
> >
> > R=rmcilroy@chromium.org
> > TEST=mjsunit/ignition/osr-from-bytecode
> > BUG=v8:4764
> >
> > Committed: https://crrev.com/a55beb68e0ededb3773affa294a71edc50621458
> > Cr-Commit-Position: refs/heads/master@{#38043}
>
> TBR=rmcilroy@chromium.org,mstarzinger@chromium.org
> # Skipping CQ checks because original CL landed less than 1 days ago.
> NOPRESUBMIT=true
> NOTREECHECKS=true
> NOTRY=true
> BUG=v8:4764
>
> Committed: https://crrev.com/439aa2c6d708bfd95db725bd6f97c4c49bbc51fc
> Cr-Commit-Position: refs/heads/master@{#38044}
TBR=rmcilroy@chromium.org,machenbach@chromium.org
BUG=v8:4764
Review-Url: https://codereview.chromium.org/2184713002
Cr-Commit-Position: refs/heads/master@{#38056}
Reason for revert:
Bunch of breakages. Maybe bad interaction with e520e5da55 ?
E.g.:
https://build.chromium.org/p/client.v8/builders/V8%20Linux64/builds/11607
Original issue's description:
> [interpreter] Add explicit OSR polling bytecode.
>
> This adds an explicit {OsrPoll} bytecode into every loop header which
> triggers on-stack replacement when armed. Note that each such bytecode
> stores the static loop depths as an operand, and hence can be armed for
> specific loop depths.
>
> This also adds builtin code that triggers OSR compilation and switches
> execution over to optimized code in case compilation succeeds. In case
> compilation fails, the bytecode dispatch just continues unhindered.
>
> R=rmcilroy@chromium.org
> TEST=mjsunit/ignition/osr-from-bytecode
> BUG=v8:4764
>
> Committed: https://crrev.com/a55beb68e0ededb3773affa294a71edc50621458
> Cr-Commit-Position: refs/heads/master@{#38043}
TBR=rmcilroy@chromium.org,mstarzinger@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=v8:4764
Review-Url: https://codereview.chromium.org/2184553003
Cr-Commit-Position: refs/heads/master@{#38044}
This adds an explicit {OsrPoll} bytecode into every loop header which
triggers on-stack replacement when armed. Note that each such bytecode
stores the static loop depths as an operand, and hence can be armed for
specific loop depths.
This also adds builtin code that triggers OSR compilation and switches
execution over to optimized code in case compilation succeeds. In case
compilation fails, the bytecode dispatch just continues unhindered.
R=rmcilroy@chromium.org
TEST=mjsunit/ignition/osr-from-bytecode
BUG=v8:4764
Review-Url: https://codereview.chromium.org/2172233002
Cr-Commit-Position: refs/heads/master@{#38043}
Use the ForInFilterStub directly. Hence we will only jump to the runtime for
special receivers (instance_type <= LAST_SPECIAL_RECEIVER_TYPE) and for
converting element indices which are not in the string cache.
BUG=
Review-Url: https://codereview.chromium.org/2151773002
Cr-Commit-Position: refs/heads/master@{#37934}
Reason for revert:
This cl causes a large regression in octane (https://chromeperf.appspot.com/group_report?bug_id=629503). I have to investigate the reason before I can reland this.
Original issue's description:
> [Interpreter] Collect type feedback for 'new' in the bytecode handler
>
> Collect type feedback in the bytecode handler for 'new' bytecode. The
> current implementation does not collect allocation site feedback.
>
> BUG=v8:4280, v8:4780
> LOG=N
>
> Committed: https://crrev.com/1eadc76419b323fb2e55ae9953142f801704aa59
> Cr-Commit-Position: refs/heads/master@{#37862}
TBR=rmcilroy@chromium.org,bmeurer@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=v8:4280, v8:4780
Review-Url: https://codereview.chromium.org/2165633003
Cr-Commit-Position: refs/heads/master@{#37872}
Collect type feedback in the bytecode handler for 'new' bytecode. The
current implementation does not collect allocation site feedback.
BUG=v8:4280, v8:4780
LOG=N
Review-Url: https://codereview.chromium.org/2153433002
Cr-Commit-Position: refs/heads/master@{#37862}
This adds initial support for ToPrimitive in JavaScript w/o having to
call out to C++. This uses the newly introduced GetPropertyStub.
R=ishell@chromium.org
Review-Url: https://codereview.chromium.org/2152693002
Cr-Commit-Position: refs/heads/master@{#37753}
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}
