R=ahaas@chromium.org

Change-Id: I9cf40958978f8ebcc34d4c9d15ea301e54829229
Reviewed-on: https://chromium-review.googlesource.com/1125076
Commit-Queue: Michael Starzinger <mstarzinger@chromium.org>
Reviewed-by: Andreas Haas <ahaas@chromium.org>
Cr-Commit-Position: refs/heads/master@{#54201}

Bug: chromium:860153
Change-Id: I1ad6c81f672efe2e705d5285b80e2855af828254
Reviewed-on: https://chromium-review.googlesource.com/1125726Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Commit-Queue: Hannes Payer <hpayer@chromium.org>
Cr-Commit-Position: refs/heads/master@{#54200}

In future the RO_SPACE root accessors in Heap will become private, so
instead convert them all to use ReadOnlyRoots.

Splits HEAP_CONSTANT_LIST into HEAP_MUTABLE_IMMOVABLE_OBJECT_LIST and
HEAP_IMMUTABLE_IMMOVABLE_OBJECT_LIST. The CSA accessors then use the
appropiate ReadOnlyRoots or Heap accessor to get hold of the object.

Bug: v8:7786
Change-Id: I3bdf868b5e224f8794c85307e1b4569480cebd1c
Reviewed-on: https://chromium-review.googlesource.com/1125725Reviewed-by: Leszek Swirski <leszeks@chromium.org>
Commit-Queue: Dan Elphick <delphick@chromium.org>
Cr-Commit-Position: refs/heads/master@{#54199}

This change may slow down deserialization of the snapshot but may result in less fragmentation.

Bug: v8:7887
Change-Id: Id8bb9f1a561b08b7ae0f10b80aa77bc00eb23172
Reviewed-on: https://chromium-review.googlesource.com/1125722Reviewed-by: Yang Guo <yangguo@chromium.org>
Commit-Queue: Hannes Payer <hpayer@chromium.org>
Cr-Commit-Position: refs/heads/master@{#54198}

The scavenger still does not handle young generation large objects correctly.
This will be added in a follow-up CL.

Bug: chromium:852420
Change-Id: I2587509d6e7f329aeff3db246d949bb30b3a91a5
Reviewed-on: https://chromium-review.googlesource.com/1124477
Commit-Queue: Hannes Payer <hpayer@chromium.org>
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Cr-Commit-Position: refs/heads/master@{#54197}

TBR=mstarzinger@chromium.org

Bug: v8:7899
Change-Id: I0b40e60a234b869737fe89726807ff30d29ce8d6
Reviewed-on: https://chromium-review.googlesource.com/1118161
Commit-Queue: Maya Lekova <mslekova@chromium.org>
Reviewed-by: Michael Starzinger <mstarzinger@chromium.org>
Cr-Commit-Position: refs/heads/master@{#54196}

This reverts commit ade7f55b.

Reason for revert: https://ci.chromium.org/p/v8/builders/luci.v8.ci/V8%20Linux/25706

Original change's description:
> Reland ^2 "[async] Expose async hooks to d8"
> 
> This is a reland of 8e0f67be
> 
> Previously landed as: 3c4d0316 / 1065818
> Previously landed as: 8e0f67be / 1088890
> 
> Original change's description:
> > [async] Expose async hooks to d8
> >
> > This implementation follows the Node.js API as a guideline.
> 
> Bug: chromium:850530
> Change-Id: I8ba22b11c80328108b197d687826ce0198420c9c
> Reviewed-on: https://chromium-review.googlesource.com/1125679
> Reviewed-by: Benedikt Meurer <bmeurer@chromium.org>
> Commit-Queue: Maya Lekova <mslekova@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#54191}

TBR=ofrobots@google.com,sergiyb@chromium.org,gsathya@chromium.org,bmeurer@chromium.org,mslekova@chromium.org

Change-Id: Id751136aee175bb3ba75edc780d62cfc9d60ed24
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: chromium:850530
Reviewed-on: https://chromium-review.googlesource.com/1125682Reviewed-by: Yang Guo <yangguo@chromium.org>
Commit-Queue: Yang Guo <yangguo@chromium.org>
Cr-Commit-Position: refs/heads/master@{#54195}

This reverts commit 1ba5d5ba.

Reason for revert: Follow-up revert for b1cf1e1e

Original change's description:
> Clean up DependentCode class.
> 
> Also move some helpers there.
> 
> Bug: v8:7902
> Change-Id: I1ef3d1e8317102afae2861382e9ba60b0ef6bba4
> Reviewed-on: https://chromium-review.googlesource.com/1121461
> Commit-Queue: Georg Neis <neis@chromium.org>
> Reviewed-by: Jaroslav Sevcik <jarin@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#54179}

TBR=jarin@chromium.org,neis@chromium.org

Change-Id: I02f01f9e8f3bcea13339d4eb87eab784b16f4ad1
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: v8:7902
Reviewed-on: https://chromium-review.googlesource.com/1125681Reviewed-by: Yang Guo <yangguo@chromium.org>
Commit-Queue: Yang Guo <yangguo@chromium.org>
Cr-Commit-Position: refs/heads/master@{#54194}

This is a preliminary step before changing the way we store zone pointers in the zones.

Bug: v8:7903, v8:7754
Change-Id: I1e1af1823766c888ee0f8fe190f205f5b7e21973
Reviewed-on: https://chromium-review.googlesource.com/1118887Reviewed-by: Ross McIlroy <rmcilroy@chromium.org>
Reviewed-by: Marja Hölttä <marja@chromium.org>
Reviewed-by: Camillo Bruni <cbruni@chromium.org>
Commit-Queue: Igor Sheludko <ishell@chromium.org>
Cr-Commit-Position: refs/heads/master@{#54193}

This reverts commit 52a10e50.

Reason for revert: https://test-results.appspot.com/data/layout_results/V8-Blink_Linux_64__dbg_/12434/layout-test-results/results.html

Crash e.g. in http/tests/devtools/oopif/oopif-performance-cpu-profiles.js

crash log for devtools (pid <unknown>):
STDOUT: <empty>
STDERR: 
STDERR: 
STDERR: #
STDERR: # Fatal error in ../../v8/src/compilation-dependencies.cc, line 281
STDERR: # Debug check failed: descriptor == owner->LastAdded() (10 vs. 22).
STDERR: #
STDERR: #
STDERR: #
STDERR: #FailureMessage Object: 0x7fff86878630#0 0x0000031c642c base::debug::StackTrace::StackTrace()
STDERR: #1 0x0000046a56bb gin::(anonymous namespace)::PrintStackTrace()
STDERR: #2 0x00000469c528 V8_Fatal()
STDERR: #3 0x00000469c285 v8::base::(anonymous namespace)::DefaultDcheckHandler()
STDERR: #4 0x000001cc5253 v8::internal::CompilationDependencies::DependOnFieldType()
STDERR: #5 0x000001cdcc46 v8::internal::compiler::AccessInfoFactory::ComputePropertyAccessInfo()
STDERR: #6 0x000001cde661 v8::internal::compiler::AccessInfoFactory::ComputePropertyAccessInfos()
STDERR: #7 0x000001dd982b v8::internal::compiler::JSNativeContextSpecialization::ReduceNamedAccess()
STDERR: #8 0x000001ddb715 v8::internal::compiler::JSNativeContextSpecialization::ReduceNamedAccessFromNexus()
STDERR: #9 0x000001dd656d v8::internal::compiler::JSNativeContextSpecialization::ReduceJSLoadNamed()
STDERR: #10 0x000001d53872 v8::internal::compiler::GraphReducer::Reduce()
STDERR: #11 0x000001d534a5 v8::internal::compiler::GraphReducer::ReduceTop()
STDERR: #12 0x000001d52e58 v8::internal::compiler::GraphReducer::ReduceNode()
STDERR: #13 0x000001e4c201 v8::internal::compiler::InliningPhase::Run()
STDERR: #14 0x000001e44f79 v8::internal::compiler::PipelineImpl::Run<>()
STDERR: #15 0x000001e41058 v8::internal::compiler::PipelineImpl::CreateGraph()
STDERR: #16 0x000001e40c75 v8::internal::compiler::PipelineCompilationJob::PrepareJobImpl()
STDERR: #17 0x000001ccd437 v8::internal::OptimizedCompilationJob::PrepareJob()
STDERR: #18 0x000001cd071e v8::internal::(anonymous namespace)::GetOptimizedCode()
STDERR: #19 0x000001cd0c6f v8::internal::Compiler::CompileOptimized()
STDERR: #20 0x00000231fb62 v8::internal::__RT_impl_Runtime_CompileOptimized_Concurrent()
STDERR: #21 0x00000288e535 <unknown>

Original change's description:
> [turbofan] Rewrite CompilationDependencies
> 
> Instead of installing code dependencies during graph reduction,
> install them after code generation.
> 
> Bug: v8:7902, v8:7790
> Change-Id: I8a3798254abb5b9ec7c295a1592aeb6b51f24c7a
> Reviewed-on: https://chromium-review.googlesource.com/1119913
> Commit-Queue: Georg Neis <neis@chromium.org>
> Reviewed-by: Jaroslav Sevcik <jarin@chromium.org>
> Reviewed-by: Michael Starzinger <mstarzinger@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#54170}

TBR=mstarzinger@chromium.org,jarin@chromium.org,neis@chromium.org

Change-Id: Ic58c2bfadbd34bb6ba7dc0d2b74871cc90b0a74f
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: v8:7902, v8:7790
Reviewed-on: https://chromium-review.googlesource.com/1125680Reviewed-by: Yang Guo <yangguo@chromium.org>
Commit-Queue: Yang Guo <yangguo@chromium.org>
Cr-Commit-Position: refs/heads/master@{#54192}

This is a reland of 8e0f67be

Previously landed as: 3c4d0316 / 1065818
Previously landed as: 8e0f67be / 1088890

Original change's description:
> [async] Expose async hooks to d8
>
> This implementation follows the Node.js API as a guideline.

Bug: chromium:850530
Change-Id: I8ba22b11c80328108b197d687826ce0198420c9c
Reviewed-on: https://chromium-review.googlesource.com/1125679Reviewed-by: Benedikt Meurer <bmeurer@chromium.org>
Commit-Queue: Maya Lekova <mslekova@chromium.org>
Cr-Commit-Position: refs/heads/master@{#54191}

R=clemensh@chromium.org

Change-Id: I756507bea262c16eb60e1c78dfb349d54633d37d
Reviewed-on: https://chromium-review.googlesource.com/1124689Reviewed-by: Clemens Hammacher <clemensh@chromium.org>
Commit-Queue: Michael Starzinger <mstarzinger@chromium.org>
Cr-Commit-Position: refs/heads/master@{#54190}

Bug: v8:7887
Change-Id: I3904981f06efcb1fb83e863d0be6a16ebaaf17f2
Reviewed-on: https://chromium-review.googlesource.com/1113930Reviewed-by: Jakob Gruber <jgruber@chromium.org>
Commit-Queue: Yang Guo <yangguo@chromium.org>
Cr-Commit-Position: refs/heads/master@{#54189}

This reverts commit 8e39af62.

Reason for revert: prevent v8 roll to chromium.

Original change's description:
> [arm64] Use root register for addressing external references.
> 
> This optimization is already done on x64 (7500e507).
> 
> Bug: v8:7844
> Change-Id: Iccc3bb55aa79ef1d4423576c79d9ce6f829f2828
> Reviewed-on: https://chromium-review.googlesource.com/1120343
> Commit-Queue: Georgia Kouveli <georgia.kouveli@arm.com>
> Reviewed-by: Sigurd Schneider <sigurds@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#54162}

TBR=sigurds@chromium.org,georgia.kouveli@arm.com

Change-Id: I08801917164e42c99a14a5e767d5c034f6979e87
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: v8:7844
Reviewed-on: https://chromium-review.googlesource.com/1124996Reviewed-by: Aleksey Kozyatinskiy <kozyatinskiy@chromium.org>
Commit-Queue: Aleksey Kozyatinskiy <kozyatinskiy@chromium.org>
Cr-Commit-Position: refs/heads/master@{#54188}

This is a reland of 3dfaf826

Original change's description:
> [debug] liveedit in native
>
> Liveedit step-by-step:
> 1. calculate diff between old source and new source,
> 2. map function literals from old source to new source,
> 3. create new script for new_source,
> 4. mark literals with changed code as changed, all others as unchanged,
> 5. check that for changed literals there are no:
>   - running generators in the heap,
>   - non droppable frames (e.g. running generator) above them on stack.
> 6. mark the bottom most frame with changed function as scheduled for
>    restart if any.
> 7. for unchanged functions:
>   - deoptimize,
>   - remove from cache,
>   - update source positions,
>   - move to new script,
>   - reset feedback information and preparsed scope information if any,
>   - replace any sfi in constant pool with changed one if any.
> 8. for changed functions:
>   - deoptimize
>   - remove from cache,
>   - reset feedback information,
>   - update all links from js functions to old shared with new one.
> 9. swap scripts.
>
> TBR=ulan@chromium.org
>
> Bug: v8:7862,v8:5713
> Cq-Include-Trybots: luci.chromium.try:linux_chromium_headless_rel;luci.chromium.try:linux_chromium_rel_ng;master.tryserver.blink:linux_trusty_blink_rel
> Change-Id: I8f6f6156318cc82d6f36d7ebc1c9f7d5f3aa1461
> Reviewed-on: https://chromium-review.googlesource.com/1105493
> Reviewed-by: Aleksey Kozyatinskiy <kozyatinskiy@chromium.org>
> Reviewed-by: Dmitry Gozman <dgozman@chromium.org>
> Reviewed-by: Yang Guo <yangguo@chromium.org>
> Commit-Queue: Aleksey Kozyatinskiy <kozyatinskiy@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#54146}

TBR=dgozman@chromium.org

Bug: v8:7862, v8:5713
Change-Id: I163ed2fd2ca3115ba0de74cb35a6fac9e40fdd94
Cq-Include-Trybots: luci.chromium.try:linux_chromium_headless_rel;luci.chromium.try:linux_chromium_rel_ng;master.tryserver.blink:linux_trusty_blink_rel
Reviewed-on: https://chromium-review.googlesource.com/1124879
Commit-Queue: Aleksey Kozyatinskiy <kozyatinskiy@chromium.org>
Reviewed-by: Aleksey Kozyatinskiy <kozyatinskiy@chromium.org>
Cr-Commit-Position: refs/heads/master@{#54187}

This is an optimization to avoid an unneeded "mov <reg>, #0"
instruction. Instead, we can just directly use the zero register.

R=ahaas@chromium.org

Bug: chromium:854011, v8:6600
Change-Id: I187d7a659c42d7d4a6d5798eddff8b7ee0983bbc
Reviewed-on: https://chromium-review.googlesource.com/1124684
Commit-Queue: Clemens Hammacher <clemensh@chromium.org>
Reviewed-by: Andreas Haas <ahaas@chromium.org>
Cr-Commit-Position: refs/heads/master@{#54186}

We need to push the sign-extended constant instead of just the lower 32
bits. Otherwise, the callee might read stale data from the stack.

Bug: chromium:854011, v8:6600

R=ahaas@chromium.org
CC=rodolph.perfetta@arm.com

Change-Id: Iafcfd6ba9532771615b41215fb4d1a2b85ce5623
Reviewed-on: https://chromium-review.googlesource.com/1124683Reviewed-by: Andreas Haas <ahaas@chromium.org>
Commit-Queue: Clemens Hammacher <clemensh@chromium.org>
Cr-Commit-Position: refs/heads/master@{#54185}

I forgot to add this test to the previous CL:
https://crrev.com/c/1122409

R=ahaas@chromium.org

Bug: v8:7914
Change-Id: I4ed3bce37ce1e42a56eabc02647d8cf91e4492c9
Reviewed-on: https://chromium-review.googlesource.com/1124687Reviewed-by: Andreas Haas <ahaas@chromium.org>
Commit-Queue: Clemens Hammacher <clemensh@chromium.org>
Cr-Commit-Position: refs/heads/master@{#54184}

In future the RO_SPACE root accessors in Heap will become private, so
instead convert them all to use ReadOnlyRoots.

Bug: v8:7786
Cq-Include-Trybots: luci.v8.try:v8_linux_noi18n_rel_ng
Change-Id: Ifd2f75298bacd2f6a89c551f689d269a59d87e97
Reviewed-on: https://chromium-review.googlesource.com/1124470
Commit-Queue: Dan Elphick <delphick@chromium.org>
Reviewed-by: Leszek Swirski <leszeks@chromium.org>
Cr-Commit-Position: refs/heads/master@{#54183}

In future the RO_SPACE root accessors in Heap will become private, so
instead convert them all to use ReadOnlyRoots.

Bug: v8:7786
Cq-Include-Trybots: luci.v8.try:v8_linux_noi18n_rel_ng
Change-Id: Ia24803003f1e6ce0782dffe448c662695620f026
Reviewed-on: https://chromium-review.googlesource.com/1124326
Commit-Queue: Dan Elphick <delphick@chromium.org>
Reviewed-by: Leszek Swirski <leszeks@chromium.org>
Cr-Commit-Position: refs/heads/master@{#54182}

In future the RO_SPACE root accessors in Heap will become private, so
instead convert them all to use ReadOnlyRoots.

Bug: v8:7786
Cq-Include-Trybots: luci.v8.try:v8_linux_noi18n_rel_ng
Change-Id: I2cc63ffc5b6df537fa7772356acd9e8b3cf59352
Reviewed-on: https://chromium-review.googlesource.com/1124322
Commit-Queue: Dan Elphick <delphick@chromium.org>
Reviewed-by: Leszek Swirski <leszeks@chromium.org>
Cr-Commit-Position: refs/heads/master@{#54181}

Using CpuProfile pointer is not safe for id as the profile objects
can be recreated on the same memory address.
Use sequential numbers instead.

Change-Id: I7253605819055bc3396b797f9ce27669e8c2584d
Reviewed-on: https://chromium-review.googlesource.com/1123325Reviewed-by: Yang Guo <yangguo@chromium.org>
Commit-Queue: Alexei Filippov <alph@chromium.org>
Cr-Commit-Position: refs/heads/master@{#54180}

Also move some helpers there.

Bug: v8:7902
Change-Id: I1ef3d1e8317102afae2861382e9ba60b0ef6bba4
Reviewed-on: https://chromium-review.googlesource.com/1121461
Commit-Queue: Georg Neis <neis@chromium.org>
Reviewed-by: Jaroslav Sevcik <jarin@chromium.org>
Cr-Commit-Position: refs/heads/master@{#54179}

Moves STRUCT_LIST AND ALLOCATION_SITE_LIST into roots.h and adds access
to their associated maps using ReadOnlyRoots.

Also corrects the location of external_map, message_object_map,
empty_script, many_closures_cell, invalid_prototype_validity_cell and
builtins_constants_table which are not in RO_SPACE.

Finally this adds a convenience ReadOnlyRoots(Isolate*) constructor.

Bug: v8:7786
Change-Id: I4982dd0cbea2062a124605678599ba48831f020f
Reviewed-on: https://chromium-review.googlesource.com/1124319Reviewed-by: Leszek Swirski <leszeks@chromium.org>
Commit-Queue: Dan Elphick <delphick@chromium.org>
Cr-Commit-Position: refs/heads/master@{#54178}

Change-Id: I21b0dfb572efab3257e25f2f3b81689c07f8f2d7
Reviewed-on: https://chromium-review.googlesource.com/1124562
Commit-Queue: Toon Verwaest <verwaest@chromium.org>
Reviewed-by: Marja Hölttä <marja@chromium.org>
Cr-Commit-Position: refs/heads/master@{#54177}

Tests cctest/test-run-wasm-simd/RunWasm_I16x8ConvertI32x4_turbofan
and cctest/test-run-wasm-simd/RunWasm_I8x16ConvertI16x8_simd_lowered
will be skipped for big endian until implementation for big endian is
done correctly.

Change-Id: Ia6253070ede207f437e4b710a656bce8d65e412e
Reviewed-on: https://chromium-review.googlesource.com/1113307
Commit-Queue: Ivica Bogosavljevic <ivica.bogosavljevic@mips.com>
Reviewed-by: Aseem Garg <aseemgarg@chromium.org>
Cr-Commit-Position: refs/heads/master@{#54176}

An i64 to i32 conversion within the same register is a noop on arm64,
since i32 operations just use the "W" part of the register anyway.

R=ahaas@chromium.org
CC=rodolph.perfetta@arm.com

Bug: v8:6600
Change-Id: Ia7cb49673c4997dc095736a054d052ffd91bb957
Reviewed-on: https://chromium-review.googlesource.com/1124449Reviewed-by: Andreas Haas <ahaas@chromium.org>
Commit-Queue: Clemens Hammacher <clemensh@chromium.org>
Cr-Commit-Position: refs/heads/master@{#54175}

This CL adds a regression test that will check that the elements
pointer is properly reloaded after the JavaScript comparison
function is called during Array.p.sort.

R=jgruber@chromium.org

Bug: chromium:859809
Change-Id: I15f55fcc1906bd8d0751596e5457367a643b92da
Reviewed-on: https://chromium-review.googlesource.com/1124475
Commit-Queue: Simon Zünd <szuend@google.com>
Reviewed-by: Jakob Gruber <jgruber@chromium.org>
Reviewed-by: Marja Hölttä <marja@chromium.org>
Cr-Commit-Position: refs/heads/master@{#54174}

R=clemensh@chromium.org

Change-Id: I2a935d87d6f9688af9bd983fc95ae87476c1f612
Reviewed-on: https://chromium-review.googlesource.com/1124464Reviewed-by: Clemens Hammacher <clemensh@chromium.org>
Commit-Queue: Michael Starzinger <mstarzinger@chromium.org>
Cr-Commit-Position: refs/heads/master@{#54173}

Most scanner logic doesn't need to care about surrogate pairs, so we can just
push it down to identifier scanning.

This CL additionally drops some explicit kEndOfInput checks that are subsumed
by predicates seemlessly returning false for kEndOfInput (-1).

Change-Id: If031a9355ab5fbca0c3b647045e3034f42923979
Reviewed-on: https://chromium-review.googlesource.com/1124447Reviewed-by: Marja Hölttä <marja@chromium.org>
Commit-Queue: Toon Verwaest <verwaest@chromium.org>
Cr-Commit-Position: refs/heads/master@{#54172}

It turns out we can just remove kReturnVariable from the normal change
tracking, since it's always set when jumping to the final label anyway.

Bug: v8:7793
Change-Id: I6d0a777016047aa31b0edddd19c661e2631e1078
Reviewed-on: https://chromium-review.googlesource.com/1124471Reviewed-by: Daniel Clifford <danno@chromium.org>
Commit-Queue: Tobias Tebbi <tebbi@chromium.org>
Cr-Commit-Position: refs/heads/master@{#54171}

Instead of installing code dependencies during graph reduction,
install them after code generation.

Bug: v8:7902, v8:7790
Change-Id: I8a3798254abb5b9ec7c295a1592aeb6b51f24c7a
Reviewed-on: https://chromium-review.googlesource.com/1119913
Commit-Queue: Georg Neis <neis@chromium.org>
Reviewed-by: Jaroslav Sevcik <jarin@chromium.org>
Reviewed-by: Michael Starzinger <mstarzinger@chromium.org>
Cr-Commit-Position: refs/heads/master@{#54170}

Bug: v8:7793
Change-Id: Ifb03938e15307910ef25b2b95c32fe69bfec1441
Reviewed-on: https://chromium-review.googlesource.com/1124458Reviewed-by: Daniel Clifford <danno@chromium.org>
Commit-Queue: Tobias Tebbi <tebbi@chromium.org>
Cr-Commit-Position: refs/heads/master@{#54169}

R=clemensh@chromium.org

Change-Id: Ia3856921a707e7d58d55a74d3f14cbdc0d69eaa5
Reviewed-on: https://chromium-review.googlesource.com/1124332
Commit-Queue: Michael Starzinger <mstarzinger@chromium.org>
Reviewed-by: Clemens Hammacher <clemensh@chromium.org>
Cr-Commit-Position: refs/heads/master@{#54168}

Variables/return values with constexpr type cannot have multiple
assignments. We check this now.
For conditionals, it is important to always infer a non-constexpr type.
This CL adds the ability to map any type (including union types) to be
mapped to their non-constexpr variant. Conditionals infer their type as
the non-constexpr version of a combination of the two branch types.

In addition, this improves subtyping for constexpr types:
If A extends B, then constexpr A extends constexpr B.
This makes it necessary to clean up "constexpr String", which has nothing
to do with tagged values.

Bug: v8:7793
Change-Id: Ia4d3cd5dc98f45b0ec89adf05c5c6111a0e51cc6
Reviewed-on: https://chromium-review.googlesource.com/1122864
Commit-Queue: Tobias Tebbi <tebbi@chromium.org>
Reviewed-by: Daniel Clifford <danno@chromium.org>
Cr-Commit-Position: refs/heads/master@{#54167}

This CL is a manual revert of the Array.p.sort Torque QuickSort
implementation.

The plan is to ship TimSort in either Chromium 69 or 70 and not ship
Torque-QuickSort at all (to keep disruption to a minimum). For this
reason we revert back to the implementation in array.js.

R=jgruber@chromium.org

Bug: chromium:859809, v8:7382
Change-Id: I92eb70408883f51d98311e78642f554316bc1e76
Reviewed-on: https://chromium-review.googlesource.com/1124334Reviewed-by: Jakob Gruber <jgruber@chromium.org>
Commit-Queue: Simon Zünd <szuend@google.com>
Cr-Commit-Position: refs/heads/master@{#54166}

When calling a builtin via a function pointer, torque tries to find any
builtin with the same parameter types for a descriptor. If no such
builtin exist, we currently crash.

Example:

type DoesNotExistFn = builtin(Context, Smi, Smi, Smi) => Smi;
macro TestMacro(c: Context, fn: DoesNotExistFn) {
  let result: Smi = fn(c, 1, 2, 3);
}

R=tebbi@chromium.org

Bug: v8:7793
Change-Id: Ia7436dc6541aca5de2e8dcb6b2a09978a1af9d39
Reviewed-on: https://chromium-review.googlesource.com/1123821Reviewed-by: Tobias Tebbi <tebbi@chromium.org>
Commit-Queue: Simon Zünd <szuend@google.com>
Cr-Commit-Position: refs/heads/master@{#54165}

The current output of release builds is not very helpful, as it does
not contain the line number, nor the values of {expect_exception} or
{i_isolate->has_pending_exception()}.

R=ahaas@chromium.org

Bug: chromium:854011
Change-Id: I0bc1b8be6151d5420310eb67b2ebd0dc866fc9a6
Reviewed-on: https://chromium-review.googlesource.com/1122869Reviewed-by: Andreas Haas <ahaas@chromium.org>
Commit-Queue: Clemens Hammacher <clemensh@chromium.org>
Cr-Commit-Position: refs/heads/master@{#54164}

Change-Id: I66426ab06f8cc3f138a9cdd60063a3da1dc4a954
Reviewed-on: https://chromium-review.googlesource.com/1123824Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Commit-Queue: Hannes Payer <hpayer@chromium.org>
Cr-Commit-Position: refs/heads/master@{#54163}

This optimization is already done on x64 (7500e507).

Bug: v8:7844
Change-Id: Iccc3bb55aa79ef1d4423576c79d9ce6f829f2828
Reviewed-on: https://chromium-review.googlesource.com/1120343
Commit-Queue: Georgia Kouveli <georgia.kouveli@arm.com>
Reviewed-by: Sigurd Schneider <sigurds@chromium.org>
Cr-Commit-Position: refs/heads/master@{#54162}