This allows try-catch and try-finally constructs to be separately
enabled and disabled. We plan to stage try-catch support soon.
R=titzer@chromium.org
Review URL: https://codereview.chromium.org/1157863015
Cr-Commit-Position: refs/heads/master@{#28848}
Embed constant pools within their corresponding Code
objects.
This removes support for out-of-line constant pools in favor
of the new approach -- the main advantage being that it
eliminates the need to allocate and manage separate constant
pool array objects.
Currently supported on PPC and ARM. Enabled by default on
PPC only.
This yields a 6% improvment in Octane on PPC64.
R=bmeurer@chromium.org, rmcilroy@chromium.org, michael_dawson@ca.ibm.com
BUG=chromium:478811
LOG=Y
Review URL: https://codereview.chromium.org/1162993006
Cr-Commit-Position: refs/heads/master@{#28801}
Stage 1 implementation:
- Parameters can't be referenced before initialized (from left-to-right)
- SingleNameBindings only, no support for BindingPatterns
Known issues:
- Incorrect scoping (parameter expressions may reference variables declared in function body)
- Function arity is untouched
- Hole-checking needs work
- Rest parameters are broken when mixed with optional arguments
BUG=v8:2160
LOG=N
R=arv@chromium.org, rossberg@chromium.org
Review URL: https://codereview.chromium.org/1127063003
Cr-Commit-Position: refs/heads/master@{#28739}
This adds a new external type (v8::SharedArrayBuffer) that uses a JSArrayBuffer
under the hood. It can be distinguished from an ArrayBuffer by the newly-added
is_shared() bit.
Currently there is no difference in functionality between a SharedArrayBuffer
and an ArrayBuffer. However, a future CL will add the Atomics API, which is
only available on an SharedArrayBuffer. All non-atomic accesses are identical
to ArrayBuffer accesses.
LOG=N
BUG=
Review URL: https://codereview.chromium.org/1136553006
Cr-Commit-Position: refs/heads/master@{#28594}
Reason for revert:
breaks build
Original issue's description:
> Implement SharedArrayBuffer.
>
> This adds a new external type (v8::SharedArrayBuffer) that uses a JSArrayBuffer under the hood. It can be distinguished from an ArrayBuffer by the newly-added is_shared() bit.
>
> Currently there is no difference in functionality between a SharedArrayBuffer and an ArrayBuffer. However, a future CL will add the Atomics API, which is only available on an SharedArrayBuffer. All non-atomic accesses are identical to ArrayBuffer accesses.
>
> BUG=
>
> Committed: https://crrev.com/57170bff7baf341c666252a7f6a49e9c08d51263
> Cr-Commit-Position: refs/heads/master@{#28588}
TBR=jarin@chromium.org,jochen@chromium.org,binji@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=
Review URL: https://codereview.chromium.org/1149203003
Cr-Commit-Position: refs/heads/master@{#28589}
This adds a new external type (v8::SharedArrayBuffer) that uses a JSArrayBuffer under the hood. It can be distinguished from an ArrayBuffer by the newly-added is_shared() bit.
Currently there is no difference in functionality between a SharedArrayBuffer and an ArrayBuffer. However, a future CL will add the Atomics API, which is only available on an SharedArrayBuffer. All non-atomic accesses are identical to ArrayBuffer accesses.
BUG=
Review URL: https://codereview.chromium.org/1136553006
Cr-Commit-Position: refs/heads/master@{#28588}
This follows the logic of the load ics, in that the base extra ic state is
better encapsulated.
Introduce flag vector_stores to aid development of vector-based store ics.
BUG=
R=jkummerow@chromium.org
Review URL: https://codereview.chromium.org/1151253004
Cr-Commit-Position: refs/heads/master@{#28576}
This allows enabling TurboFan on a certain subset of language features
in the AstNumberingVisitor. The heuristics of when to optimize remain
unchanged, only the choice of which optimizing compiler to use changes.
R=bmeurer@chromium.org
BUG=v8:4131
LOG=N
Review URL: https://codereview.chromium.org/1155503002
Cr-Commit-Position: refs/heads/master@{#28544}
Replace the --turbo-deoptimization flag with --turbo-asm-deoptimization
and enable deoptimization for non-asm.js TurboFan code unconditionally.
R=jarin@chromium.org
Review URL: https://codereview.chromium.org/1153483002
Cr-Commit-Position: refs/heads/master@{#28543}
This allows you to put iterables into your array literals
and the will get spread into the array.
let x = [0, ...range(1, 3)]; // [0, 1, 2]
This is done by treating the array literal up to the first
spread element as usual, including using a boiler plate
array, and then appending the remaining expressions and rest
expressions.
BUG=v8:3018
LOG=N
Review URL: https://codereview.chromium.org/1125183008
Cr-Commit-Position: refs/heads/master@{#28534}
This introduces V8.MemoryHeapCommitted and V8.MemoryHeapUsed histograms.
In contrast to the existing memory histograms, the new histograms are uniform in time, i.e. their samples happen at regular time intervals. The --histogram-interval specifies the length of the interval.
We implement this by linearly interpolating memory stats between GC and idle notification events.
BUG=chromium:485472
LOG=NO
Review URL: https://codereview.chromium.org/1125683004
Cr-Commit-Position: refs/heads/master@{#28292}
Tail calls are matched on the graph, with a dedicated tail call
optimization that is actually testable. The instruction selection can
still fall back to a regular if the platform constraints don't allow to
emit a tail call (i.e. the return locations of caller and callee differ
or the callee takes non-register parameters, which is a restriction that
will be removed in the future).
Also explicitly limit tail call optimization to stubs for now and drop
the global flag.
BUG=v8:4076
LOG=n
Review URL: https://codereview.chromium.org/1114163005
Cr-Commit-Position: refs/heads/master@{#28219}
This introduces a simplified allocation operator which can be used to
model inline allocations in TurboFan. It is currently used for context
allocations, but still disabled because change lowering introduces
floating allocations outside the effect chain that interfere.
R=bmeurer@chromium.org
Review URL: https://codereview.chromium.org/1109773002
Cr-Commit-Position: refs/heads/master@{#28195}
This CL contains the first steps towards tail call optimization:
* Structurally detect tail calls during instruction selection,
looking for special return/call combinations.
* Added new architecture-specific instructions for tail calls which
jump instead of call and take care of frame adjustment.
* Moved some code around.
Currently we restrict tail calls to callees which only use registers
for arguments/return value and to call sites which are explicitly
marked as being OK for tail calls. This excludes, among other things,
call sites in sloppy JS functions and our IC machinery (both need in
general to be able to access the caller's frame).
All this is behind a flag --turbo-tail-calls, which is currently off
by default, so it can easily be toggled.
Review URL: https://codereview.chromium.org/1108563002
Cr-Commit-Position: refs/heads/master@{#28150}
This change aims to introduce the separation of the RegisterAllocator model, using the initial prototype for GreedyAllocator as proof of concept.
Summary:
- new flag, turbo-greedy-regalloc, enabling the new allocator. Default
false.
- initial, untested implementation for the GreedyAllocator.
BUG=
Review URL: https://codereview.chromium.org/1061923005
Cr-Commit-Position: refs/heads/master@{#28018}
Reason for revert:
Breaks Static Initializers test.
http://build.chromium.org/p/client.v8/builders/V8%20Linux64/builds/3210/steps/Static-Initializers/logs/stdio
Original issue's description:
> Introducing the LLVM greedy register allocator.
>
> This change aims to introduce the separation of the RegisterAllocator model,
> using the initial prototype for RegisterAllocatorGreedy as proof of concept.
>
> Summary:
> - new flag, turbo-greedy-regalloc, enabling the new allocator. Default
> false.
> - separated RegisterAllocator into a base type and two derived,
> RegisterAllocatorLinear (the one currently used in TurboFan) and
> RegisterAllocatorGreedy (the new one).
> - initial, untested impementation for the greedy allocator.
>
> BUG=
>
> Committed: https://crrev.com/ec542dea6b6a0cb82d1578a389569d019a59121d
> Cr-Commit-Position: refs/heads/master@{#28015}
TBR=dcarney@chromium.org,titzer@chromium.org,jarin@chromium.org,jvoung@chromium.org,mtrofin@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=
Review URL: https://codereview.chromium.org/1080953006
Cr-Commit-Position: refs/heads/master@{#28017}
This change aims to introduce the separation of the RegisterAllocator model,
using the initial prototype for RegisterAllocatorGreedy as proof of concept.
Summary:
- new flag, turbo-greedy-regalloc, enabling the new allocator. Default
false.
- separated RegisterAllocator into a base type and two derived,
RegisterAllocatorLinear (the one currently used in TurboFan) and
RegisterAllocatorGreedy (the new one).
- initial, untested impementation for the greedy allocator.
BUG=
Review URL: https://codereview.chromium.org/1061923005
Cr-Commit-Position: refs/heads/master@{#28015}
This flag is intended as a staging flag for TurboFan. It serves as a
single flag that always enables a most recent configuration of TurboFan
for test suites and benchmarks, without needing to update test drivers.
R=titzer@chromium.org,machenbach@chromium.org
Review URL: https://codereview.chromium.org/1094573002
Cr-Commit-Position: refs/heads/master@{#27896}
