This CL merely sets the --ignition-generators flag to true. This flag is
currently only meaningful in combination with --ignition.

BUG=

Review-Url: https://codereview.chromium.org/2065963002
Cr-Commit-Position: refs/heads/master@{#37144}

Implements:
- WebAssembly object,
- WebAssembly.Module constructor,
- WebAssembly.Instance constructor,
- WebAssembly.compile async method,
- and Module and Instance instance objects.

Also, changes ErrorThrower to support capturing errors in a promise reject.

Since we cannot yet compile without fixing the Wasm memory, and cannot validate a module without compiling, the Module constructor and compile method don't do anything yet but checking that their argument is a suitable BufferSource. Instead of a compiled module, the hidden state of a Module object currently is just that buffer.

BUG=

Review-Url: https://codereview.chromium.org/2084573002
Cr-Commit-Position: refs/heads/master@{#37143}

If all uses of a CheckTaggedHole[convert-hole-to-undefined] node
truncate to word32, we can replace the hole check with a Smi check
and return the result as word32.

R=jarin@chromium.org

Review-Url: https://codereview.chromium.org/2079233006
Cr-Commit-Position: refs/heads/master@{#37142}

Review-Url: https://codereview.chromium.org/2087693003
Cr-Commit-Position: refs/heads/master@{#37141}

This runtime function now also works for Ignition generators. It returns the
source position of the yield at which a suspended generator got suspended.  This
works by storing the current bytecode offset at suspension and using an existing
mechanism to map it back to a source position.

TBR=littledan@chromium.org
BUG=

Review-Url: https://codereview.chromium.org/2079613003
Cr-Commit-Position: refs/heads/master@{#37140}

Revert of [heap] Avoid the use of cells to point from code to new-space objects. (patchset #7 id:120001 of https://codereview.chromium.org/2045263002/ )

Reason for revert:
[Sheriff] Breaks arm debug:
https://build.chromium.org/p/client.v8.ports/builders/V8%20Linux%20-%20arm%20-%20sim%20-%20debug/builds/1038

Original issue's description:
> [heap] Avoid the use of cells to point from code to new-space objects.
>
> Cells were needed originally because there was no typed remembered set to
> record direct pointers from code space to new space. A previous
> CL (https://codereview.chromium.org/2003553002/) already introduced
> the remembered set, this CL uses it.
>
> This CL
> * stores direct pointers in code objects, even if the target is in new space,
> * records the slot of the pointer in typed-old-to-new remembered set,
> * adds a list which stores weak code-to-new-space references,
> * adds a test to test-heap.cc for weak code-to-new-space references,
> * removes prints in tail-call-megatest.js
>
> R=ulan@chromium.org
>
> Committed: https://crrev.com/2d2087b79a293a92a6ed34a2775e481ff2173b3c
> Cr-Commit-Position: refs/heads/master@{#37134}

TBR=titzer@chromium.org,ulan@chromium.org,ahaas@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true

Review-Url: https://codereview.chromium.org/2087463004
Cr-Commit-Position: refs/heads/master@{#37139}

Lsan only works with x64. This broke when landing:
https://codereview.chromium.org/2085513002/

BUG=616035
TBR=jochen@chromium.org, vogelheim@chromium.org, kjellander@chromium.org
NOTRY=true
NOTREECHECKS=true

Review-Url: https://codereview.chromium.org/2086623003
Cr-Commit-Position: refs/heads/master@{#37138}

Revert of [Interpreter] Map runtime id's to intrinsic id's in InvokeIntrinsic bytecode. (patchset #3 id:40001 of https://codereview.chromium.org/2084623002/ )

Reason for revert:
[Sheriff] Breaks gc stress:
https://build.chromium.org/p/client.v8/builders/V8%20Linux64%20GC%20Stress%20-%20custom%20snapshot/builds/6304

Original issue's description:
> [Interpreter] Map runtime id's to intrinsic id's in InvokeIntrinsic bytecode.
>
> Make intrinsic ids a contiguous set of ids so that the switch statement can build
> a table switch rather than doing a large if/else tree.
>
> BUG=v8:4822
> LOG=N
>
> Committed: https://crrev.com/36abd28a8d9932eb55d7c2bf3ad5e7cfe3eb99ea
> Cr-Commit-Position: refs/heads/master@{#37135}

TBR=epertoso@chromium.org,oth@chromium.org,rmcilroy@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=v8:4822

Review-Url: https://codereview.chromium.org/2085823003
Cr-Commit-Position: refs/heads/master@{#37137}

Add explicit state in BytecodeSourceInfo to simplify checks for
validity and whether a statement or expression position.

Remove BytecodeSourceInfo::Update which inherited rules for updating
source position information during bytecode building.

BUG=v8:4280
LOG=N

Review-Url: https://codereview.chromium.org/2048203002
Cr-Commit-Position: refs/heads/master@{#37136}

Make intrinsic ids a contiguous set of ids so that the switch statement can build
a table switch rather than doing a large if/else tree.

BUG=v8:4822
LOG=N

Review-Url: https://codereview.chromium.org/2084623002
Cr-Commit-Position: refs/heads/master@{#37135}

Cells were needed originally because there was no typed remembered set to
record direct pointers from code space to new space. A previous
CL (https://codereview.chromium.org/2003553002/) already introduced
the remembered set, this CL uses it.

This CL
* stores direct pointers in code objects, even if the target is in new space,
* records the slot of the pointer in typed-old-to-new remembered set,
* adds a list which stores weak code-to-new-space references,
* adds a test to test-heap.cc for weak code-to-new-space references,
* removes prints in tail-call-megatest.js

R=ulan@chromium.org

Review-Url: https://codereview.chromium.org/2045263002
Cr-Commit-Position: refs/heads/master@{#37134}

We need to trim the graph before we execute the MemoryOptimizer, because
that just walks the effect chain from Start to End and cannot deal with
dead nodes in the use lists.

R=jarin@chromium.org
BUG=chromium:614292

Review-Url: https://codereview.chromium.org/2080703003
Cr-Commit-Position: refs/heads/master@{#37133}

With the tail call, pointers to the JS heap could be pushed on a
js-to-wasm frame. On the js-to-wasm frame, however, this pointer would
not be updated by the GC.

R=bmeurer@chromium.org, v8-arm-ports@googlegroups.com, v8-mips-ports@googlegroups.com
BUG=617084
TEST=mjsunit/wasm/gc-frame.js:GCInJSToWasmTest()

Review-Url: https://codereview.chromium.org/2079393003
Cr-Commit-Position: refs/heads/master@{#37132}

Base the fast-path in AdjustAmountOfExternalMemory on a value + limit. To
preserve the behavior the limit is just set using kExternalAllocationLimit.

Redo naming of related members.

R=jochen@chromium.org
BUG=chromium:621829
LOG=N

Review-Url: https://codereview.chromium.org/2085893002
Cr-Commit-Position: refs/heads/master@{#37131}

Cr-Commit-Position: refs/heads/master@{#37130}

BUG=chromium:616035
NOTRY=true

Review-Url: https://codereview.chromium.org/2085513002
Cr-Commit-Position: refs/heads/master@{#37129}

While the EcmaScript specification doesn't define precise values for the
Math constants or the Math functions, we should at least ensure that the
values of the constants and the functions agree, i.e. Math.E should be
exactly the same value as Math.exp(1).

Also make sure that Math.exp(1) returns the expected value; we should
revisit the fdlibm algorithm and figure out why it's wrong in the last
bit.

CQ_INCLUDE_TRYBOTS=tryserver.chromium.linux:linux_chromium_rel_ng;tryserver.blink:linux_blink_rel
BUG=chromium:626111,v8:3266,v8:3468,v8:3493,v8:5086,v8:5108
R=yangguo@chromium.org

Review-Url: https://codereview.chromium.org/2079233005
Cr-Commit-Position: refs/heads/master@{#37128}

  port 757221e5(r36876)

  original commit message:
  Neither globals nor lookup slots can be hole-initialized anymore, thus
  removing some dead code from the code generators and runtime-scopes.

BUG=

Review-Url: https://codereview.chromium.org/2086813002
Cr-Commit-Position: refs/heads/master@{#37127}

Yanking out in an effort to reduce dependencies. We probably want to
separate codegen into instance-specific and module-generic purpose -
eventually.

BUG=

Review-Url: https://codereview.chromium.org/2085863003
Cr-Commit-Position: refs/heads/master@{#37126}

  port 406146ff(r36870)

  original commit message:
  This makes sure we do not compile ToNumber stub on demand. This makes it
  easier to use during concurrent compilation.

BUG=

Review-Url: https://codereview.chromium.org/2088633003
Cr-Commit-Position: refs/heads/master@{#37125}

  port 40b5c1d4(r36842)

  original commit message:

BUG=

Review-Url: https://codereview.chromium.org/2080873003
Cr-Commit-Position: refs/heads/master@{#37124}

  port 3cfcc7e1 (r36786)

  original commit message:
  It may be that we have a feedback vector, but no literals. In this case
  we can store into the OptimizedCodeMap directly instead of using a WeakCell,
  because all data in the feedback vector is already held weakly.

  The use of a WeakCell in the OptimizedCodeMap is only required when
  there are literals which may hold maps strongly.

  This is to address a performance regression caused by the creation of
  a large number of WeakCells.

BUG=

Review-Url: https://codereview.chromium.org/2081663004
Cr-Commit-Position: refs/heads/master@{#37123}

R=jochen@chromium.org, verwaest@chromium.org
BUG=chromium:617892

Review-Url: https://codereview.chromium.org/2076083002
Cr-Commit-Position: refs/heads/master@{#37122}

Rolling v8/build to 7580e8854eb309008f00f115ea0adb13dac454a4

Rolling v8/buildtools to 4dcb5ed1079e7a527061925637b8cc627e289e82

Rolling v8/tools/clang to ea64c667cd841b2c3268bd7dfd223269f3ea23ba

Rolling v8/tools/gyp to 35eafcd939515d51d19556c543f9cf97faf75ee6

Rolling v8/tools/mb to 8b4a59c463a697a3e418c28e85f534e87337ba7f

TBR=machenbach@chromium.org,vogelheim@chromium.org,hablich@chromium.org

Review-Url: https://codereview.chromium.org/2078333005
Cr-Commit-Position: refs/heads/master@{#37121}

When separating compile from instantiation, I accidentally elided size
reporting for wasm functions. This change fixes that (verified with
re-running benchmarks), and also consolidates the responsibility of
size reporting within the instantiation method, away from the various
compile phases.

We should probably rethink this reporting when we move wasm codegen
off the JS Heap, if the wasm module code ends up being shared.

BUG=

Review-Url: https://codereview.chromium.org/2079353002
Cr-Commit-Position: refs/heads/master@{#37120}

BUG=

Review-Url: https://codereview.chromium.org/2080693002
Cr-Commit-Position: refs/heads/master@{#37119}

Port 198e09de

Original commit message:

    Construct a BUILTIN frame before throwing an exception from runtime.

R=jgruber@chromium.org, joransiu@ca.ibm.com, jyan@ca.ibm.com, michael_dawson@ca.ibm.com, mbrandy@us.ibm.com
BUG=

Review-Url: https://codereview.chromium.org/2083523004
Cr-Commit-Position: refs/heads/master@{#37118}

Port cbc6adc8

Original commit message:

    Runtime_DeclareLookupSlot is used when generating code for var and function declarations
    originating in an eval. Over time, it's accumulated quite a bit of cruft, which this CL removes:

      - With legacy const gone, lookup slots never have any property attributes.
      - There was a bit signaling that the variable was from an eval, but that was redundant since
        DeclareLookupSlot is only used for eval.
      - Some Proxy-related code didn't make sense here.

    Its name was also not terribly clear: while "LookupSlot" is used in several places, this
    particular function is only used for declaring variables and functions inside sloppy eval.
    Renamed (and split into two) to make this clear for future archeologists.

    Also added various DCHECKs to check the assumptions being made.

R=adamk@chromium.org, joransiu@ca.ibm.com, jyan@ca.ibm.com, michael_dawson@ca.ibm.com, mbrandy@us.ibm.com

BUG=
LOG=N

Review-Url: https://codereview.chromium.org/2085623003
Cr-Commit-Position: refs/heads/master@{#37117}

Port c1d01aea

Original commit message:

    Compilation of wasm functions happens before instantiation. Imports are linked afterwards, at instantiation time. Globals and memory are also
    allocated and then tied in via relocation at instantiation time.

    This paves the way for implementing Wasm.compile, a prerequisite to
    offering the compiled code serialization feature.

    Currently, the WasmModule::Compile method just returns a fixed array
    containing the code objects. More appropriate modeling of the compiled module to come.

    Opportunistically centralized the logic on how to update memory
    references, size, and globals, since that logic is the exact same on each
    architecture, except for the actual storing of values back in the
    instruction stream.

R=mtrofin@chromium.org, joransiu@ca.ibm.com, jyan@ca.ibm.com, michael_dawson@ca.ibm.com, mbrandy@us.ibm.com

BUG=v8:5072
LOG=N

Review-Url: https://codereview.chromium.org/2087453002
Cr-Commit-Position: refs/heads/master@{#37116}

Port c87168bc

Original commit message:

    Import base::ieee754::tan() from fdlibm and introduce Float64Tan TurboFan
    operator based on that, similar to what we do for Float64Cos and Float64Sin.
    Rewrite Math.tan() as TurboFan builtin and use those operators to also
    inline Math.tan() into optimized TurboFan functions.

    Drive-by-fix: Kill the %_ConstructDouble intrinsics, and provide only
    the %ConstructDouble runtime entry for writing tests.

R=bmeurer@chromium.org, joransiu@ca.ibm.com, jyan@ca.ibm.com, michael_dawson@ca.ibm.com, mbrandy@us.ibm.com

BUG=v8:5086,v8:5126
LOG=N

Review-Url: https://codereview.chromium.org/2080303002
Cr-Commit-Position: refs/heads/master@{#37115}

This brings some more flags in line with the GYP build on Windows. In particular, this ads the SSE2 flag on x86, and the stack linker flag on x64.

Review-Url: https://codereview.chromium.org/2077173002
Cr-Commit-Position: refs/heads/master@{#37114}

Revert of Refactor CpuProfiler. (patchset #13 id:240001 of https://codereview.chromium.org/2053523003/ )

Reason for revert:
MIPS compilation error.

Original issue's description:
> Refactor CpuProfiler.
>
> Currently CpuProfiler is a subclass of CodeEventListener, it listens code events
> from Logger, constructs and stores CodeEventsContainer. This patch is part of
> the effort to split the logic of CodeEventListener as ProfilerListener out of
> the profiling functionality logic in CpuProfiler. A ProfilerListener will listen
> to code events, construct code event to CodeEventsContainer and pass it to code
> event handler.
>
> The reason we refactor CpuProfiler is that eventually we want to move
> CpuProfiler as part of sampler library and code event listener should stay
> inside V8.
>
> Main changes:
> 1. Refactored CpuProfiler into two parts, the CpuProfiler with profling
> functionality and the ProfilerListener listening to code events from Logger.
> 2. Created CodeEventObserver and made CpuProfiler inherit from it.
> ProfilerListener will have a list of observers and call CodeEventHandler once a
> code event is created.
> 3. Moved code entry list from CodeEntry to ProfilerListener.
>
> Minor changes:
> 1. Moved static code entry as part of CodeEntry.
> 2. Added ProfilerListener to Logger.
>
> BUG=v8:4789
>
> Committed: https://crrev.com/cb59fc1facc9b390e2c7544b4da56a4e0a9b3222
> Cr-Commit-Position: refs/heads/master@{#37112}

TBR=alph@chromium.org,jochen@chromium.org,yangguo@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=v8:4789

Review-Url: https://codereview.chromium.org/2079273003
Cr-Commit-Position: refs/heads/master@{#37113}

Currently CpuProfiler is a subclass of CodeEventListener, it listens code events
from Logger, constructs and stores CodeEventsContainer. This patch is part of
the effort to split the logic of CodeEventListener as ProfilerListener out of
the profiling functionality logic in CpuProfiler. A ProfilerListener will listen
to code events, construct code event to CodeEventsContainer and pass it to code
event handler.

The reason we refactor CpuProfiler is that eventually we want to move
CpuProfiler as part of sampler library and code event listener should stay
inside V8.

Main changes:
1. Refactored CpuProfiler into two parts, the CpuProfiler with profling
functionality and the ProfilerListener listening to code events from Logger.
2. Created CodeEventObserver and made CpuProfiler inherit from it.
ProfilerListener will have a list of observers and call CodeEventHandler once a
code event is created.
3. Moved code entry list from CodeEntry to ProfilerListener.

Minor changes:
1. Moved static code entry as part of CodeEntry.
2. Added ProfilerListener to Logger.

BUG=v8:4789

Review-Url: https://codereview.chromium.org/2053523003
Cr-Commit-Position: refs/heads/master@{#37112}

Runtime_DeclareLookupSlot is used when generating code for var and function declarations
originating in an eval. Over time, it's accumulated quite a bit of cruft, which this CL removes:

  - With legacy const gone, lookup slots never have any property attributes.
  - There was a bit signaling that the variable was from an eval, but that was redundant since
    DeclareLookupSlot is only used for eval.
  - Some Proxy-related code didn't make sense here.

Its name was also not terribly clear: while "LookupSlot" is used in several places, this
particular function is only used for declaring variables and functions inside sloppy eval.
Renamed (and split into two) to make this clear for future archeologists.

Also added various DCHECKs to check the assumptions being made.

Review-Url: https://codereview.chromium.org/2061173002
Cr-Commit-Position: refs/heads/master@{#37111}

BUG=

Review-Url: https://codereview.chromium.org/2078053002
Cr-Commit-Position: refs/heads/master@{#37110}

R=jochen@chromium.org, vogelheim@chromium.org
BUG=chromium:617892

Review-Url: https://codereview.chromium.org/2066993004
Cr-Commit-Position: refs/heads/master@{#37109}

BUG=chromium:620553
LOG=N
R=jochen@chromium.org

Review-Url: https://codereview.chromium.org/2078403002
Cr-Commit-Position: refs/heads/master@{#37108}

Previously we would elide debug slots if the statement position it
belongs to has just already been written. The motivation is that since
we should only break once per statement, we can elide debug slots that
has the same statement position as the previous debug slot.

This is an unnecessary optimization, since the debugger has yet another
check against breaking twice at the same statement at runtime, in
Debug::Break.

This optimization can also be wrong, if there is control flow involved,
for example if we can jump to the elided debug slot without executing
the previous debug slot.

CQ_INCLUDE_TRYBOTS=tryserver.chromium.linux:linux_chromium_rel_ng;tryserver.blink:linux_blink_rel
R=jgruber@chromium.org

Review-Url: https://codereview.chromium.org/2080173002
Cr-Commit-Position: refs/heads/master@{#37107}

BUG=chromium:616035
NOTRY=true

Review-Url: https://codereview.chromium.org/2082583002
Cr-Commit-Position: refs/heads/master@{#37106}

MIPS: Followup '[turbofan] Introduce new operators Float32SubPreserveNan and Float64SubPreserveNan'.

Port 481502da

Float32SubMinusZero and Float64SubMinusZero tests are failing because MIPS does not preserve NaN payload according to Wasm spec. Implemented macro-assembler methods that check for NaN operands, and return the qNaN value with preserved payload and sign bits.

TEST=cctest/test-run-wasm/Run_WasmFloat32SubMinusZero, cctest/test-run-wasm/Run_WasmFloat64SubMinusZero

BUG=

patch from issue 2019693002 at patchset 140001 (http://crrev.com/2019693002#ps140001)

R=ahaas@chromium.org

Review-Url: https://codereview.chromium.org/2066483008
Cr-Commit-Position: refs/heads/master@{#37105}