- 28 Nov, 2019 7 commits
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Michael Starzinger authored
R=tebbi@chromium.org BUG=v8:10021 Change-Id: I39052fa22ea90b392a36e7841f8586c19c8ca9cf Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1940156 Commit-Queue: Michael Starzinger <mstarzinger@chromium.org> Reviewed-by:
Tobias Tebbi <tebbi@chromium.org> Cr-Commit-Position: refs/heads/master@{#65229}
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Clemens Backes authored
We implement exponential growing of the native allocations by always growing at least by the old size. This speeds up use cases that grow a table incrementally (e.g. by 1). R=mstarzinger@chromium.org CC=ecmziegler@chromium.org Bug: v8:10018 Change-Id: I580ecf1ac87f793ff4a34ba45a86ae599eb3e6f7 Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1939452Reviewed-by:
Michael Starzinger <mstarzinger@chromium.org> Commit-Queue: Clemens Backes <clemensb@chromium.org> Cr-Commit-Position: refs/heads/master@{#65228}
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Santiago Aboy Solanes authored
Even though they don't generate any code, it breaks some pattern matching when these nodes are present (e.g comparisons with compressed heap objects). Bug: v8:7703 Change-Id: I9670c2b4e85b1635061b16d4b125de9ff51fd403 Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1940153Reviewed-by:
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David Carlier authored
Those fields are incorrect in FreeBSD. Upstreaming local FreeBSD patches. Change-Id: I28cf6dbec1d5e4d26e62dd9a0d78d039c3e36cdb Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1906374Reviewed-by:
Peter Marshall <petermarshall@chromium.org> Reviewed-by:
Ulan Degenbaev <ulan@chromium.org> Commit-Queue: Ulan Degenbaev <ulan@chromium.org> Cr-Commit-Position: refs/heads/master@{#65226}
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Michael Starzinger authored
This removes the aforementioned untyped method and switches all users to the typed TNode<> version. Those versions now contain proper checks to compare the static information against the return count and types stored in the call descriptor. R=leszeks@chromium.org BUG=v8:10021 Change-Id: I393ea6211babc100e007fb1678877d36efa7bbf7 Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1939753Reviewed-by:
Leszek Swirski <leszeks@chromium.org> Commit-Queue: Michael Starzinger <mstarzinger@chromium.org> Cr-Commit-Position: refs/heads/master@{#65225}
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Zhang, Shiyu authored
This CL adds a prototype_chain_enum_cache to cache the enumeration of a prototype and its entire chain on the PrototypeInfo. It can improve for-in performance via simply merging the receiver enumeration with this cache. It improves the score of JetStream2-tagcloud-SP case by ~9% on IA Chromebook. Contributed by tao.pan@intel.com Change-Id: Ib40bfe41e772672337155584672f06fa1ba1e70d Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1870844 Commit-Queue: Shiyu Zhang <shiyu.zhang@intel.com> Reviewed-by:
Toon Verwaest <verwaest@chromium.org> Cr-Commit-Position: refs/heads/master@{#65224}
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v8-ci-autoroll-builder authored
Rolling v8/build: https://chromium.googlesource.com/chromium/src/build/+log/5fafe92..eeb227e Rolling v8/third_party/catapult: https://chromium.googlesource.com/catapult/+log/fec12b8..fa0def7 Rolling v8/third_party/depot_tools: https://chromium.googlesource.com/chromium/tools/depot_tools/+log/34267f8..f31cb80 Rolling v8/third_party/instrumented_libraries: https://chromium.googlesource.com/chromium/src/third_party/instrumented_libraries/+log/8c512f2..4dca59c Rolling v8/tools/clang: https://chromium.googlesource.com/chromium/src/tools/clang/+log/4d65f00..05979d8 TBR=machenbach@chromium.org,tmrts@chromium.org Change-Id: Id69c231e8af78181690ec92abeb1159f21e9da70 Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1941369Reviewed-by:
v8-ci-autoroll-builder <v8-ci-autoroll-builder@chops-service-accounts.iam.gserviceaccount.com> Commit-Queue: v8-ci-autoroll-builder <v8-ci-autoroll-builder@chops-service-accounts.iam.gserviceaccount.com> Cr-Commit-Position: refs/heads/master@{#65223}
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- 27 Nov, 2019 33 commits
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Joshua Litt authored
This reverts commit bd9efe1f. Reason for revert: clusterfuzz Bug: chromium:1029174 Original change's description: > [regexp] Stage match indices. > > Bug: v8:9548 > Change-Id: Id6be43433b12733e39db712559715ba30e681059 > Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1935207 > Commit-Queue: Joshua Litt <joshualitt@chromium.org> > Reviewed-by: Jakob Gruber <jgruber@chromium.org> > Cr-Commit-Position: refs/heads/master@{#65218} TBR=adamk@chromium.org,jgruber@chromium.org,joshualitt@chromium.org Change-Id: I098385e2dcebc7bfacd91312bcebfdb889b3d0ca No-Presubmit: true No-Tree-Checks: true No-Try: true Bug: v8:9548 Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1941137Reviewed-by:
Joshua Litt <joshualitt@chromium.org> Commit-Queue: Joshua Litt <joshualitt@chromium.org> Cr-Commit-Position: refs/heads/master@{#65222}
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Dan Elphick authored
First this plumbs RuntimeCallStats from the OptimizingCompileDispatcher down through to PipelineCompilationJob which stashes the RuntimeCallStats on the PipelineData. Adds new RCS thread-specific counters: OptimizeAssembleCode and OptimizeBackgroundAssembleCode which are used in PipelineImpl::AssembleCode. Bug: v8:10006 Change-Id: Ieef6d32afddf4b0760e204010b09a85dfec92cf3 Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1926030 Commit-Queue: Dan Elphick <delphick@chromium.org> Reviewed-by:
Ross McIlroy <rmcilroy@chromium.org> Reviewed-by:
Georg Neis <neis@chromium.org> Reviewed-by:
Maya Lekova <mslekova@chromium.org> Reviewed-by:
Nico Hartmann <nicohartmann@chromium.org> Cr-Commit-Position: refs/heads/master@{#65221}
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Georg Neis authored
The serializer was missing the opportunity to process calls later constructed by JSNativeContextSpecialization::InlinePropertySetterCall and InlinePropertyGetterCall. Added a test to ensure we're not missing the data anymore. This drops the "Missing data" warnings when running ARES-6 from 1044 to only 12. Bug: v8:7790 Change-Id: Ic4b8a4cb2ac3927371b75f22de011b9957502319 Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1937147Reviewed-by:
Michael Stanton <mvstanton@chromium.org> Commit-Queue: Maya Lekova <mslekova@chromium.org> Cr-Commit-Position: refs/heads/master@{#65220}
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Johannes Henkel authored
New revision: 7a44a37f66b58358dd8ab85ccde1998fafa95e53 Upstream review: https://chromium-review.googlesource.com/c/deps/inspector_protocol/+/1899564 Previously, we used a wrapper library, v8-inspector-protocol-encoding.h to inject the string<->number conversion into the cbor parser. This meant that the unittests, in third_party/inspector_protocol/crdtp/json_test.cc inadvertently did not run with the same string<->number conversion code. Thus, we missed that the production implementation would return INF for out of range double literals, as opposed to rejecting the incoming JSON. When switching the library to the build dependency on json_platform_v8.cc as it's in this change, the test immediately failed which made it trivial to fix the implementation. Old implementation: https://chromium-review.googlesource.com/c/v8/v8/+/1913424/6/src/inspector/v8-inspector-protocol-encoding.cc New implementation (checks std::isfinite): https://chromium-review.googlesource.com/c/v8/v8/+/1913424/6/third_party/inspector_protocol/crdtp/json_platform_v8.cc Change-Id: Ia48fe1f4e359eea47d0ede9ceadea1fd635292e0 Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1913424Reviewed-by:
Yang Guo <yangguo@chromium.org> Commit-Queue: Johannes Henkel <johannes@chromium.org> Cr-Commit-Position: refs/heads/master@{#65219}
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Joshua Litt authored
Bug: v8:9548 Change-Id: Id6be43433b12733e39db712559715ba30e681059 Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1935207 Commit-Queue: Joshua Litt <joshualitt@chromium.org> Reviewed-by:
Jakob Gruber <jgruber@chromium.org> Cr-Commit-Position: refs/heads/master@{#65218}
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Georg Neis authored
... in line with VirtualContext and VirtualBoundFunction. Bug: v8:7790 Change-Id: I454048ab4ddc192780a09017b8b47caf60386098 Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1940247 Auto-Submit: Georg Neis <neis@chromium.org> Reviewed-by:
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Joshua Litt authored
This reverts commit 48c9ca44. Reason for revert: Possible clusterfuzz issues Bug: chromium:1028952 Original change's description: > [names] Fix some test262 name tests to conform with spec changes > > In order to reflect web reality, TC39 has made some slight changes to > name descriptors, see https://github.com/tc39/ecma262/pull/1490 for > details. V8 was mostly already in compliance with these changes, but > ThrowTypeError and anonymous classes needed some slight changes. > > Bug: v8:9646 > Change-Id: I163238954938f0c005e3adbc61b90498e01436da > Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1764622 > Reviewed-by: Sathya Gunasekaran <gsathya@chromium.org> > Commit-Queue: Joshua Litt <joshualitt@chromium.org> > Cr-Commit-Position: refs/heads/master@{#63373} TBR=gsathya@chromium.org,joshualitt@chromium.org Bug: v8:9646 Change-Id: I06dd5527d30052d9c9dfc45a2862be930274aba7 Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1939948Reviewed-by:
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Zhao Jiazhong authored
port edd50ad2 https://crrev.com/c/1924355 Original Commit Message: In both ChangeIntPtrToSmi and ChangeInt32ToSmi we can use bitcasts instead of change nodes for Smi Tagging, when we are using 31 bit smis in 64 bit architectures with pointer compression enabled. In ChangeIntPtrToSmi we can ignore the truncation as well. Updated DecompressionOptimizer to match the new pattern. Change-Id: I309e6c7ba671499f721149e1ea1c8e153fe3b2ef Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1939028 Auto-Submit: Zhao Jiazhong <zhaojiazhong-hf@loongson.cn> Reviewed-by:
Bill Budge <bbudge@chromium.org> Commit-Queue: Bill Budge <bbudge@chromium.org> Cr-Commit-Position: refs/heads/master@{#65215}
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Joshua Litt authored
Bug: chromium:1028475 Change-Id: I0101930e01d41b0f29fa28a257e3dc720069faff Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1936835Reviewed-by:
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David Carlier authored
Adaptation coming from the ports for upstream purposes. Change-Id: Ia1d0d6dabfd10d5840084bb90814c33ea9fb6aa8 Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1906373Reviewed-by:
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Ulan Degenbaev authored
This removes the marking worklist draining loop from IncrementalMarking and makes it use the one of MarkCompactCollector. Bug: chromium:973627 Change-Id: I226b4b45be7d542a82bba20162ad210dfb419c39 Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1940250 Commit-Queue: Ulan Degenbaev <ulan@chromium.org> Reviewed-by:
Hannes Payer <hpayer@chromium.org> Cr-Commit-Position: refs/heads/master@{#65212}
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v8-ci-autoroll-builder authored
Rolling v8/third_party/catapult: https://chromium.googlesource.com/catapult/+log/1ef02be..fec12b8 Rolling v8/third_party/depot_tools: https://chromium.googlesource.com/chromium/tools/depot_tools/+log/341d41b..34267f8 Rolling v8/third_party/instrumented_libraries: https://chromium.googlesource.com/chromium/src/third_party/instrumented_libraries/+log/b627b3e..8c512f2 TBR=machenbach@chromium.org,tmrts@chromium.org Change-Id: Iebb343ff9117ecf7377b7c4db9073807f44b6779 Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1939745Reviewed-by:
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Clemens Backes authored
In order to implement {dlsym} like functionality, toolchains might generate code that grows the table by one element at a time (e.g. Emscripten currently does that). To improve performance in such a case, we over-allocate the backing store of the {WasmTableObject}. Whenever the backing store grows, it grows at least by the old size of the table. This ensures exponentially growth, avoiding too many re-allocations. R=mstarzinger@chromium.org CC=ecmziegler@chromium.org Bug: v8:10018 Change-Id: I502d590a89f7804363938a157b7ed2189283227a Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1939051Reviewed-by: -
Liviu Rau authored
No-Presubmit: true No-Tree-Checks: true No-Try: true Change-Id: I0b0ab62625b69c3baa88d0b9850f946b901f31d5 Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1939456 Commit-Queue: Liviu Rau <liviurau@chromium.org> Reviewed-by:
Michael Achenbach <machenbach@chromium.org> Cr-Commit-Position: refs/heads/master@{#65209}
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Yang Guo authored
BUG: v8:7463 Change-Id: I75e81aa78ce2cd75ab4e393ffaec614da6e2bf7b Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1939708 Commit-Queue: Yang Guo <yangguo@chromium.org> Auto-Submit: Yang Guo <yangguo@chromium.org> Reviewed-by:
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Igor Sheludko authored
Bug: chromium:1028669 Change-Id: I3f690508f09a98b6b6b0f3808033fac4fae40700 Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1940248 Commit-Queue: Igor Sheludko <ishell@chromium.org> Commit-Queue: Toon Verwaest <verwaest@chromium.org> Auto-Submit: Igor Sheludko <ishell@chromium.org> Reviewed-by:
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Mythri A authored
ObjectRefs either use the serialized data or access the heap depending on whether broker mode is disabled or not. This cl changes it to use the mode of the data and accesses heap for UnserializedHeapObject. This allows us to access heap for some of the objects (ex: readonly object) instead of serializing them. This change shouldn't change any behaviour. In a followup cl, we will mark readonly objects as UnserializedHeapObjects even when broker mode is serialized. Bug: v8:9684 Change-Id: I8775e60ed480957b485c39df254827dd69c655a8 Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1937148Reviewed-by:
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Leszek Swirski authored
This reverts commit 347092ac. Not a clean revert, since other changes got baked on top, but rather a manual removal of LoadLazyICParameters. Reason for revert: Seems to actually regress bindings perf tests (see bugs and https://chromeperf.appspot.com/group_report?rev=62539), doesn't seem to improve performance elsewhere, and increases complexity. Original change's description: > [ic] Load name/context lazily in LdaNamedProperty > > Introduces LazyLoadICParameters which allow a LazyNode for context and > name. These aren't used on the fast path, so we want to avoid reading > them for both performance and register pressure reasons. > > Change-Id: Ifb637cf4782ce984feee9af503998e7539beb823 > Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1686665 > Commit-Queue: Leszek Swirski <leszeks@chromium.org> > Reviewed-by: Toon Verwaest <verwaest@chromium.org> > Cr-Commit-Position: refs/heads/master@{#62539} # Not skipping CQ checks because original CL landed > 1 day ago. Bug: chromium:981797 Bug: chromium:982630 Change-Id: I88af764d17afb76d6e64b95a3d1e4aaa1c6c8978 Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1934327 Auto-Submit: Leszek Swirski <leszeks@chromium.org> Reviewed-by:
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Peter Marshall authored
Deprecated in 79. Change-Id: If0e2b95b4b66328858b33a533454a469c80fad63 Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1940147 Commit-Queue: Peter Marshall <petermarshall@chromium.org> Commit-Queue: Yang Guo <yangguo@chromium.org> Auto-Submit: Peter Marshall <petermarshall@chromium.org> Reviewed-by:
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Liviu Rau authored
No-Presubmit: true No-Tree-Checks: true No-Try: true Change-Id: I24ea5db016039f916a07f7c9361442b00d44a6c1 Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1939454 Commit-Queue: Liviu Rau <liviurau@chromium.org> Reviewed-by:
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Mythri A authored
Enabling concurrent inlining builds the graph on background thread reducing the time spent on main thread. Bug: v8:9684 Change-Id: Iee00aa991ab8e14fad76b0d9c0b0fd9f8d1eecde Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1937149Reviewed-by:
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Michael Achenbach authored
https://v8.dev/blog/tags/release is the new ChangeLog! No-Try: true Bug: v8:10010 Change-Id: I6a0a8a893dfa29607ba2431daeea8ad1b11e2405 Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1940148Reviewed-by:
Mathias Bynens <mathias@chromium.org> Reviewed-by:
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Clemens Backes authored
We want to grow the table entries exponentially, so the entries length will not reflect the actual size of the table any more. Hence, introduce another field on {WasmTableObject} to store the actual length. R=mstarzinger@chromium.org CC=ecmziegler@chromium.org Bug: v8:10018 Change-Id: Ie8252f33fddda3ae60dd24bd8db148fd67262226 Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1939050 Commit-Queue: Clemens Backes <clemensb@chromium.org> Reviewed-by: -
Leszek Swirski authored
To indicate that the Isolate* in getters might not be a "real" isolate, but rather a calculated one from GetIsolateForPtrCompr only used for calculating the isolate root, make that function return a const Isolate* and change field getters, Object::IsFoo predicates, and related functions to all take a const Isolate* instead of an Isolate* With this change, we can slightly more confidently use Objects that are in OffThreadSpace, without having to worry too much about having an Isolate* floating around that could accidentally be used. This is a slight abuse of const semantics, but it allows implicit conversion from Isolate* arguments to the const Isolate* parameter. Bug: v8:7703 Bug: chromium:1011762 Change-Id: I54d4a65d2299477195f4d754cabe64ce34fdaa4c Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1939455 Commit-Queue: Leszek Swirski <leszeks@chromium.org> Auto-Submit: Leszek Swirski <leszeks@chromium.org> Reviewed-by:
Igor Sheludko <ishell@chromium.org> Reviewed-by:
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Shu-yu Guo authored
This was added in 2d889aa9 but all consumers of it have since been removed. Bug: v8:10021 Change-Id: I13aa12853e1720b2f919ca8b29737fedb96bc145 Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1938462 Auto-Submit: Shu-yu Guo <syg@chromium.org> Commit-Queue: Ross McIlroy <rmcilroy@chromium.org> Reviewed-by:
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Liviu Rau authored
No-Presubmit: true No-Tree-Checks: true No-Try: true Change-Id: I2dfffdbcb2052880c57a02f7b67cd7f8a4da706f Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1939453 Commit-Queue: Liviu Rau <liviurau@chromium.org> Reviewed-by:
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Georg Neis authored
This enum defined three modes of doing inlining: kGeneralInlining, kRestrictedInlining, kStressInlining. kStressInlining was unused. kRestrictedInlining meant that JSInliningHeuristic::Reduce would return NoChange, but only after wasting some time inspecting calls. This is now replaced by simply not installing JSInliningHeuristic as a reducer when inlining is disabled. Note: There is still a --stress-inline flag, which sets (through flag implications) a bunch of parameters that affect inlining. Change-Id: I05bafbe3f1f35610d7035a2c71c5ac17bdb80758 Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1936473 Auto-Submit: Georg Neis <neis@chromium.org> Reviewed-by:
Mythri Alle <mythria@chromium.org> Reviewed-by:
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Nico Hartmann authored
Bug: v8:9861 Change-Id: I7bcd8059145cf8be12d59b30745e79f56b896ef2 Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1932369 Commit-Queue: Nico Hartmann <nicohartmann@chromium.org> Reviewed-by:
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Jakob Gruber authored
All builtins are now guaranteed to be in the embedded blob. Setup of the builtins entry table can be simplified to directly fetch instruction starts from the embedded blob. Additionally, this CL adds a sanity check for the builtin Code object's builtin_index (to verify the Code object is uncorrupted). The CHECK can be removed or changed to a DCHECK once the linked bug is resolved. Bug: chromium:1020986 Change-Id: I38832790132e284c7fc23251a5dc2eefb8456de6 Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1939048 Auto-Submit: Jakob Gruber <jgruber@chromium.org> Commit-Queue: Dan Elphick <delphick@chromium.org> Reviewed-by:
Dan Elphick <delphick@chromium.org> Cr-Commit-Position: refs/heads/master@{#65194}
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Jakob Gruber authored
After landing a few relatively simple ports in preceding work, this CL ports the more involved Array.prototype.forEach reduction, containing checkpoints, JS and runtime calls, loops, and exceptions. With the mechanisms introduced in this change, I'd expect a large chunk of js-call reductions to be trivially portable. Newly introduced: - IfBuilder0 for if-then-else statements (with optional else). - ForBuilder for for-loop statements. - MayThrow() for exceptional control flow. Exceptional edges are automatically merged and wired into the outer graph if necessary. Bug: v8:9972 Change-Id: I835bf90c5871fbd94a1d12721d44b500fbef75e2 Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1921798Reviewed-by:
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Michael Achenbach authored
Bug: v8:7783 Change-Id: I5273d7fb34d216d556792aa940765d7e1a060b7c Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1939448Reviewed-by:
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Michael Achenbach authored
https://v8.dev/blog/tags/release is the new ChangeLog! This also removes an unused file push_to_candidate.py which wasn't deleted earlier as it's intertwined a lot in test cases. This CL also cleans that up. Furthermore, logic for selecting CLs for the ChangeLog (using LOG= lines) is removed as well. Nobody has used this feature for more than 5 release cycles. We'll delete the ChangeLog file in a separate CL. Bug: v8:10010 No-Try: true Change-Id: Idee551dc0600c3df9f784cc543897e3e18517ca1 Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1930616Reviewed-by:
Tamer Tas <tmrts@chromium.org> Commit-Queue: Michael Achenbach <machenbach@chromium.org> Cr-Commit-Position: refs/heads/master@{#65191}
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Clemens Backes authored
This adds a few tests that test that the output of Liftoff is deterministic. These tests will be extended to test the debug side table in follow-up CLs. R=mstarzinger@chromium.org Bug: v8:10019 Change-Id: Ia7992e7a889bf6dad963e5abe5b50507735996a1 Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1932371 Commit-Queue: Clemens Backes <clemensb@chromium.org> Reviewed-by:
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