Add simplified operator reduction rule that reduces
CheckedTaggedSignedToInt32(ConvertTaggedHoleToUndefined(x))
to
CheckedTaggedSignedToInt32(x)
which avoids the unnecessary hole to undefined conversion, as the check
operation will fail equally on either hole or undefined.
BUG=v8:5267
R=jarin@chromium.org
Review-Url: https://codereview.chromium.org/2384453002
Cr-Commit-Position: refs/heads/master@{#39863}
This is useful for correctness fuzzing where different compilers might
overflow the stack in different points.
Review-Url: https://codereview.chromium.org/2381773003
Cr-Commit-Position: refs/heads/master@{#39862}
This flag was disabled by default, and has been broken for a long time.
BUG=
Review-Url: https://codereview.chromium.org/2374063004
Cr-Commit-Position: refs/heads/master@{#39858}
Strings takes a considerate amount of time and times out on
many platforms. Generally the iterations need to be reduced
to free resources.
NOTRY=true
TBR=hablich@chromium.org
Review-Url: https://codereview.chromium.org/2374393002
Cr-Commit-Position: refs/heads/master@{#39856}
Tracing CPU profiler allows V8 to automatically collect CPU profile when tracing
is started with category v8.cpu_profile2 enabled.
BUG=chromium:406277
Review-Url: https://codereview.chromium.org/2378143003
Cr-Commit-Position: refs/heads/master@{#39855}
Reason for revert:
No real improvement as we still lack the ability to promote from
scavenges/young gen GCs.
Let's keep this in mind for later.
Original issue's description:
> [heap] Remove border page
>
> A page now belongs either the nursery *or* the intermediate gen. The page that
> contained objects of both spaces is removed in this change.
>
> BUG=chromium:636331
>
> Committed: https://crrev.com/42ece47446f0dbd3779d6e0e00dce97a1931a9f9
> Cr-Commit-Position: refs/heads/master@{#39778}
TBR=ulan@chromium.org,hpayer@chromium.org
BUG=chromium:636331
Review-Url: https://codereview.chromium.org/2383443002
Cr-Commit-Position: refs/heads/master@{#39854}
This ports the platform-specific SubStringStub to TurboFan.
It also contains a minor bug-fix for the case when the requested substring
length equals the subject string length, but the start index is not equal to 0.
The old stub implementation returned the subject string, while the new
implementation calls into runtime, which finally results in a thrown exception.
BUG=v8:5415
Committed: https://crrev.com/49be31921536716706a6790fbbf9c346b975af16
Review-Url: https://codereview.chromium.org/2355793003
Cr-Original-Commit-Position: refs/heads/master@{#39653}
Cr-Commit-Position: refs/heads/master@{#39851}
When lowering a JSLoadNamed with an immutable own property of a
known constant JSObject, we can just constant fold the load during
native context specialization, similar to what Crankshaft does in
HOptimizedGraphBuilder::BuildLoadNamedField. This way we can also
constant-fold stuff like Math.LN2 and friends.
R=jarin@chromium.org
BUG=v8:5267
Review-Url: https://codereview.chromium.org/2376033002
Cr-Commit-Position: refs/heads/master@{#39849}
Rolling v8/base/trace_event/common to 08b7b94e88aecc99d435af7f29fda86bd695c4bd
Rolling v8/build to d3f34f8dfaecc23202a6ef66957e83462d6c826d
TBR=machenbach@chromium.org,vogelheim@chromium.org,hablich@chromium.org
Review-Url: https://codereview.chromium.org/2380463004
Cr-Commit-Position: refs/heads/master@{#39847}
The module size is encoded as a HeapNumber, and needs to be
explicitly cloned.
BUG=chromium:647649
Review-Url: https://codereview.chromium.org/2347333002
Cr-Commit-Position: refs/heads/master@{#39845}
- Store instruction with an offset bigger than GrowMemory offset should handle out of bounds correctly
- Refactor to separate runnning from compile so arguments can be passed in to module builder tests.
BUG=chromium:644670
R=ahaas@chromium.org, titzer@chromium.org
Review-Url: https://codereview.chromium.org/2373613004
Cr-Commit-Position: refs/heads/master@{#39840}
Reason for revert:
OOMs in nosnap debug:
https://build.chromium.org/p/client.v8/builders/V8%20Linux%20-%20nosnap%20-%20debug/builds/9572
Original issue's description:
> [heap] New heuristics for starting of incremental marking.
>
> The motivation for this patch is to move more marking work to tasks.
> This is done by postponing the start of incremental marking until
> a marking task is running.
>
> This patch introduces a soft and a hard limits for incremental marking.
> When the soft limit is reached, the marking task is scheduled.
> If the hard limit is reached before the task is running, then
> incremental marking is started without waiting for the task.
>
> BUG=chromium:616434
> LOG=NO
>
> Committed: https://crrev.com/55683ddd2a32e0dfb8df66271fbf53e3618cce9d
> Cr-Commit-Position: refs/heads/master@{#39831}
TBR=hpayer@chromium.org,ulan@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=chromium:616434
Review-Url: https://codereview.chromium.org/2375983002
Cr-Commit-Position: refs/heads/master@{#39833}
Adds a fast-path test and branch for the turbofan graph generated by
BytecodeGraphBuilder for dynamic local lookups.
BUG=v8:5263
Review-Url: https://codereview.chromium.org/2378653003
Cr-Commit-Position: refs/heads/master@{#39832}
The motivation for this patch is to move more marking work to tasks.
This is done by postponing the start of incremental marking until
a marking task is running.
This patch introduces a soft and a hard limits for incremental marking.
When the soft limit is reached, the marking task is scheduled.
If the hard limit is reached before the task is running, then
incremental marking is started without waiting for the task.
BUG=chromium:616434
LOG=NO
Review-Url: https://codereview.chromium.org/2364923002
Cr-Commit-Position: refs/heads/master@{#39831}
Previously we'd have a scope in the main zone, and another in the temp zone. Then we carefully copied back data to the main zone. This CL changes it so that the scope is just fixed up to only contain data from the main zone. That avoids additional copies and additional allocations; while not increasing the care that needs to be taken. This will also make it easier to abort preparsing while parsing using a temp zone.
BUG=
Committed: https://crrev.com/f41e7ebd62b32e861b6aa14ad8bfce3018d03c3c
Review-Url: https://codereview.chromium.org/2368313002
Cr-Original-Commit-Position: refs/heads/master@{#39800}
Cr-Commit-Position: refs/heads/master@{#39828}
This patch simplifies code for speeding up marking and
removes write barrier counter.
The step size is now computed based in two parts:
- bytes to mark in order to keep up with allocation,
- bytes to mark in order to make progress.
BUG=chromium:616434, chromium:646139, chromium:644819
LOG=NO
Review-Url: https://codereview.chromium.org/2359903002
Cr-Commit-Position: refs/heads/master@{#39827}
This patch replaces cumulative counters with the counters for the current GC cycle.
It also replaces the ring buffer of record incremental marking speeds with a single variable.
Review-Url: https://codereview.chromium.org/2361563004
Cr-Commit-Position: refs/heads/master@{#39826}
This cl introduces reporter to the embedder heap tracer. Heap tracer uses
reporter to report reachable objects from embedder heap. This refactoring is a
step towards being able to take heap snapshots with wrapper tracing.
LOG=no
BUG=468240
Review-Url: https://codereview.chromium.org/2371733002
Cr-Commit-Position: refs/heads/master@{#39824}
Reason for revert:
Revert due to asm.js slowdown
Original issue's description:
> Don't use different function scopes when parsing with temp zones
>
> Previously we'd have a scope in the main zone, and another in the temp zone. Then we carefully copied back data to the main zone. This CL changes it so that the scope is just fixed up to only contain data from the main zone. That avoids additional copies and additional allocations; while not increasing the care that needs to be taken. This will also make it easier to abort preparsing while parsing using a temp zone.
>
> BUG=
>
> Committed: https://crrev.com/f41e7ebd62b32e861b6aa14ad8bfce3018d03c3c
> Cr-Commit-Position: refs/heads/master@{#39800}
TBR=marja@chromium.org,adamk@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=
Review-Url: https://codereview.chromium.org/2379533003
Cr-Commit-Position: refs/heads/master@{#39821}
Add documentation for Has(), HasOwnProperty(), and HasRealNamedProperty()
that points out their differences and links to the other functions.
BUG=v8:5433
Review-Url: https://codereview.chromium.org/2365403003
Cr-Commit-Position: refs/heads/master@{#39818}
TurboFan lowering (see [0]) of ConsString creation cannot ensure that
the first part of the cons string is non-empty without introducing a phi
and negatively impacting performance.
This modifies ConsStringIterator to allow empty first parts of
ConsStrings.
BUG=v8:5440
Review-Url: https://codereview.chromium.org/2377983002
Cr-Commit-Position: refs/heads/master@{#39817}
