Before this change we would first load an 8/16/32-bit value from memory into a 32-bit register, then zero/sign-extend from that register to a 64-bit one. Now we replace that pattern with a single movsx/movzx.
Ported from http://crrev.com/2183923003R=bmeurer@chromium.org
Review-Url: https://codereview.chromium.org/2220483003
Cr-Commit-Position: refs/heads/master@{#38388}
Reason for revert:
[Sheriff] Fails on nosnap debug:
https://build.chromium.org/p/client.v8/builders/V8%20Linux%20-%20nosnap%20-%20debug/builds/8403
Original issue's description:
> [Interpreter] Collect type feedback for 'new' in the bytecode handler
>
> Collect type feedback in the bytecode handler for 'new' bytecode. The
> earlier cl (https://codereview.chromium.org/2153433002/) was reverted
> because that implementation did not collect allocation site feedback.
> This regressed delta blue by an order of magnitude. This implementation
> includes collection of allocation site feedback.
>
> BUG=v8:4280, v8:4780
> LOG=N
>
> Committed: https://crrev.com/9d5e6129c4c7f9cbfe81a5fad2a470f219fe137c
> Cr-Commit-Position: refs/heads/master@{#38364}
TBR=bmeurer@chromium.org,rmcilroy@chromium.org,balazs.kilvady@imgtec.com,mythria@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=v8:4280, v8:4780
Review-Url: https://codereview.chromium.org/2212343002
Cr-Commit-Position: refs/heads/master@{#38368}
Collect type feedback in the bytecode handler for 'new' bytecode. The
earlier cl (https://codereview.chromium.org/2153433002/) was reverted
because that implementation did not collect allocation site feedback.
This regressed delta blue by an order of magnitude. This implementation
includes collection of allocation site feedback.
BUG=v8:4280, v8:4780
LOG=N
Review-Url: https://codereview.chromium.org/2190293003
Cr-Commit-Position: refs/heads/master@{#38364}
A corresponding flag was added as well to help us find out what breaks when we
do not clear pending exceptions on each JS entry.
BUG=5259
Review-Url: https://codereview.chromium.org/2208663002
Cr-Commit-Position: refs/heads/master@{#38292}
This will enable the interpreter to add a bytecode and use the stub.
BUG=v8:4280
LOG=n
Review-Url: https://codereview.chromium.org/2177273002
Cr-Commit-Position: refs/heads/master@{#38219}
In the process also inline the stub into the appropriate interpreter bytecode
handler and make sure that the context register is preserved in hand-written
assembly code that calls the stub and expects the context register to be
preserved.
BUG=608675
Review-Url: https://codereview.chromium.org/2188993003
Cr-Commit-Position: refs/heads/master@{#38132}
So far TurboFan wasn't adding the deoptimization reasons for eager/soft
deoptimization exits that can be used by either the DevTools profiler or
the --trace-deopt flag. This adds basic support for deopt reasons on
Deoptimize, DeoptimizeIf and DeoptimizeUnless nodes and threads through
the reasons to the code generation.
Also moves the DeoptReason to it's own file (to resolve include cycles)
and drops unused reasons.
R=jarin@chromium.org
Review-Url: https://codereview.chromium.org/2161543002
Cr-Commit-Position: refs/heads/master@{#37823}
All stores require a Slot parameter so VectorStoreICTrampolineDescriptor is a new StoreDescriptor.
VectorStoreICDescriptor renamed to StoreWithVectorDescriptor.
Review-Url: https://codereview.chromium.org/2147043002
Cr-Commit-Position: refs/heads/master@{#37779}
Original commit message:
Also, CodeGenerator::MakeCodeEpilogue now accepts an optional pointer
to a EhFrameWriter and will attach unwinding information to the code
object when passed one.
Reason for reverting:
The STATIC_CONST_MEMBER_DEFINITION in eh-frame-writer-unittest.cc
causes a compiler error on V8 Win64 - clang buildbot.
Removing that bit.
BUG=v8:4899
LOG=N
Review-Url: https://codereview.chromium.org/2023503002
Cr-Commit-Position: refs/heads/master@{#37754}
After this CL we can avoid using Code::flags in hash computations for megamorphic
stub caches and therefore the unused ICState field can be finally removed from flags.
BUG=chromium:618701
Review-Url: https://codereview.chromium.org/2123983004
Cr-Commit-Position: refs/heads/master@{#37708}
Original commit message:
Also, CodeGenerator::MakeCodeEpilogue now accepts an optional pointer
to a EhFrameWriter and will attach unwinding information to the code
object when passed one.
Reason for reverting:
The STATIC_CONST_MEMBER_DEFINITION in eh-frame-writer-unittest.cc
causes a compiler error on V8 Win64 - clang buildbot.
Removing that bit.
BUG=v8:4899
LOG=N
Review-Url: https://codereview.chromium.org/2023503002
Cr-Commit-Position: refs/heads/master@{#37707}
Collect type feedback in the call bytecode handler. The current
implementation only collects feedback for JS function objects. The other
objects and Array functions do not collect any feedback. They will be
marked Megamorphic.
BUG=v8:4280, v8:4780
LOG=N
Review-Url: https://codereview.chromium.org/2122183002
Cr-Commit-Position: refs/heads/master@{#37700}
Reason for revert:
The STATIC_CONST_MEMBER_DEFINITION in eh-frame-writer-unittest.cc causes a compiler error on V8 Win64 - clang buildbot. Removing that bit should be sufficient.
Original issue's description:
> Implement .eh_frame writer and disassembler.
>
> Also, CodeGenerator::MakeCodeEpilogue now accepts an optional pointer
> to a EhFrameWriter and will attach unwinding information to the code
> object when passed one.
>
> BUG=v8:4899
> LOG=N
>
> Committed: https://crrev.com/27d810e63b744b5b3d9aa28ff21413247773e6c2
> Cr-Commit-Position: refs/heads/master@{#37683}
TBR=rmcilroy@chromium.org,jarin@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=v8:4899
Review-Url: https://codereview.chromium.org/2143033002
Cr-Commit-Position: refs/heads/master@{#37688}
Also, CodeGenerator::MakeCodeEpilogue now accepts an optional pointer
to a EhFrameWriter and will attach unwinding information to the code
object when passed one.
BUG=v8:4899
LOG=N
Review-Url: https://codereview.chromium.org/2023503002
Cr-Commit-Position: refs/heads/master@{#37683}
This CL is on the way to extend parallel compilation of wasm modules to code generation. With parallel compilation it is not allowed to dereference handles during code generation. However, the is_identical_to check dereferences handles. In this CL we therefore replace the call to is_identical_to with a handle comparison.
Review-Url: https://codereview.chromium.org/2109143002
Cr-Commit-Position: refs/heads/master@{#37607}
Stack trace generation requires access to the receiver; and while the
receiver is already on the stack, we cannot determine its position
during stack trace generation (it's stored in argv[0], and argc is only
stored in a callee-saved register).
This patch grants access to the receiver by pushing argc onto builtin
exit frames as an extra argument. Compared to simply pushing the
receiver, this requires an additional dereference during stack trace
generation, but one fewer during builtin calls.
BUG=v8:4815
Review-Url: https://codereview.chromium.org/2106883003
Cr-Commit-Position: refs/heads/master@{#37500}
-Defines SIMD128_REGISTERS for all platforms.
-Adds Simd128 register information to RegisterConfiguration, and implements
aliasing calculations.
LOG=N
BUG=v8:4124
Review-Url: https://codereview.chromium.org/2092103004
Cr-Commit-Position: refs/heads/master@{#37437}
Prior to this commit, calls to C++ builtins created standard exit
frames, which are skipped when constructing JS stack traces. In order to
show these calls on traces, we introduce a new builtin exit frame type.
Builtin exit frames contain target and new.target on the stack and are
not skipped during stack trace construction.
BUG=v8:4815
R=bmeurer@chromium.org, yangguo@chromium.org
CQ_INCLUDE_TRYBOTS=tryserver.chromium.linux:linux_chromium_rel_ng;tryserver.blink:linux_blink_rel;tryserver.v8:v8_linux_nosnap_dbg
Committed: https://crrev.com/3c60c6b105f39344f93a8407f41534e5e60cf19a
Review-Url: https://codereview.chromium.org/2090723005
Cr-Original-Commit-Position: refs/heads/master@{#37384}
Cr-Commit-Position: refs/heads/master@{#37416}
Reason for revert:
Looks like this breaks on nosnap: http://build.chromium.org/p/client.v8/builders/V8%20Linux%20-%20nosnap%20-%20debug/builds/7626
Original issue's description:
> [builtins] New frame type for exits to C++ builtins
>
> Prior to this commit, calls to C++ builtins created standard exit
> frames, which are skipped when constructing JS stack traces. In order to
> show these calls on traces, we introduce a new builtin exit frame type.
>
> Builtin exit frames contain target and new.target on the stack and are
> not skipped during stack trace construction.
>
> BUG=v8:4815
> R=bmeurer@chromium.org, yangguo@chromium.org
> CQ_INCLUDE_TRYBOTS=tryserver.chromium.linux:linux_chromium_rel_ng;tryserver.blink:linux_blink_rel
>
> Committed: https://crrev.com/3c60c6b105f39344f93a8407f41534e5e60cf19a
> Cr-Commit-Position: refs/heads/master@{#37384}
TBR=yangguo@chromium.org,jgruber@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=v8:4815
Review-Url: https://codereview.chromium.org/2106113002
Cr-Commit-Position: refs/heads/master@{#37394}
Prior to this commit, calls to C++ builtins created standard exit
frames, which are skipped when constructing JS stack traces. In order to
show these calls on traces, we introduce a new builtin exit frame type.
Builtin exit frames contain target and new.target on the stack and are
not skipped during stack trace construction.
BUG=v8:4815
R=bmeurer@chromium.org, yangguo@chromium.org
CQ_INCLUDE_TRYBOTS=tryserver.chromium.linux:linux_chromium_rel_ng;tryserver.blink:linux_blink_rel
Review-Url: https://codereview.chromium.org/2090723005
Cr-Commit-Position: refs/heads/master@{#37384}
The reason for reverting is: This breaks gc-stress bot:
https://chromegw.corp.google.com/i/client.v8/builders/V8%20Linux64%20GC%20Stress%20-%20custom%20snapshot
Abortion of compaction could cause duplicate entries in the typed-old-to-new remembered set. These duplicates could cause a DCHECK to trigger which checks that slots recorded in the remembered set never point to to-space. This reland-CL allows duplicates in the remembered set by removing the DCHECK, and additionally clears entries in the remembered set if objects are moved.
Original issue's description:
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
Review-Url: https://codereview.chromium.org/2097023002
Cr-Commit-Position: refs/heads/master@{#37325}
Introduce a new machine operator Float64Pow that for now is backed by
the existing MathPowStub to start the unification of Math.pow, and at
the same time address the main performance issue that TurboFan still has
with the imaging-darkroom benchmark in Kraken.
Also migrate the Math.pow builtin itself to a TurboFan builtin and
remove a few hundred lines of hand-written platform code for special
handling of the fullcodegen Math.pow version.
BUG=v8:3599,v8:5086,v8:5157
Review-Url: https://codereview.chromium.org/2103733003
Cr-Commit-Position: refs/heads/master@{#37323}
the .eh_frame format as part of the jitdump generated when
FLAG_perf_prof is enabled. The final goal is allowing precise unwinding
of callchains that include JITted code when profiling V8 using perf.
Unwinding information is stored in the body of code objects after the
code itself, prefixed with its length and aligned to a 8-byte boundary.
A boolean flag in the header signals its presence, resulting in zero
memory overhead when the generation of unwinding info is disabled or
no such information was attached to the code object.
A new jitdump record type (with id 4) is introduced for specifying
optional unwinding information for code load records. The EhFrameHdr
struct is also introduced, together with a constructor to initialise it
from the associated code object.
At this stage no unwinding information is written to the jitdump, but
the infrastructure for doing so is ready in place.
BUG=v8:4899
LOG=N
Review-Url: https://codereview.chromium.org/1993653003
Cr-Commit-Position: refs/heads/master@{#37296}
- Add a const bool kSimpleFPAliasing variable for each platform so it's
easier for the compiler to eliminate dead code.
- Modify RegisterAllocator to use it.
LOG=N
BUG=v8:4124
Review-Url: https://codereview.chromium.org/2101473002
Cr-Commit-Position: refs/heads/master@{#37288}
Port fc59eb8a7a
Original commit message:
Moves between operands with different representations shouldn't happen,
so don't test them. This makes it easier to modify canonicalization to
differentiate between floating point types, which is needed to support
floating point register aliasing for ARM and MIPS.
This change also expands tests to include explicit FP moves (both register and stack slot).
LOG=N
BUG=v8:4124
BUG=chromium:622619
Review-Url: https://codereview.chromium.org/2090993002
Cr-Commit-Position: refs/heads/master@{#37241}
Reason for revert:
This breaks gc-stress bot: https://chromegw.corp.google.com/i/client.v8/builders/V8%20Linux64%20GC%20Stress%20-%20custom%20snapshot
#
# Fatal error in ../../src/heap/mark-compact.cc, line 3715
# Check failed: Page::FromAddress(reinterpret_cast<HeapObject*>(*slot)->address()) ->IsFlagSet(Page::PAGE_NEW_NEW_PROMOTION).
#
I can reproduce locally, and local revert also fixes it -> revert.
Reproduce with:
out/Debug/d8 --test --random-seed=2140216864 --nohard-abort --nodead-code-elimination --nofold-constants --enable-slow-asserts --debug-code --verify-heap --allow-natives-syntax --harmony-tailcalls test/mjsunit/mjsunit.js test/mjsunit/es6/tail-call-megatest-shard2.js --gc-interval=500 --stress-compaction --concurrent-recompilation-queue-length=64 --concurrent-recompilation-delay=500 --concurrent-recompilation
(Maybe run in loop; it's flaky when broken; but passes reliably w/ revert.)
Original issue's description:
> Reland [heap] Avoid the use of cells to point from code to new-space objects.
>
> The reason for reverting was: [Sheriff] Breaks arm debug:
> https://build.chromium.org/p/client.v8.ports/builders/V8%20Linux%20-%20arm%20-%20sim%20-%20debug/builds/1038.
>
> The problem was the dereferencing of handles for smi checks. It turned out
> that these smi checks can be removed anyways, both on arm and on mips.
>
> Additionally some rebasing was necessary.
>
> Original issue's description:
>
> 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=mlippautz@chromium.org
>
> Committed: https://crrev.com/5508e16592522658587da71ba6743c8e832fe4d1
> Cr-Commit-Position: refs/heads/master@{#37217}
TBR=mlippautz@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/2090983002
Cr-Commit-Position: refs/heads/master@{#37221}
The reason for reverting was: [Sheriff] Breaks arm debug:
https://build.chromium.org/p/client.v8.ports/builders/V8%20Linux%20-%20arm%20-%20sim%20-%20debug/builds/1038.
The problem was the dereferencing of handles for smi checks. It turned out
that these smi checks can be removed anyways, both on arm and on mips.
Additionally some rebasing was necessary.
Original issue's description:
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=mlippautz@chromium.org
Review-Url: https://codereview.chromium.org/2091733002
Cr-Commit-Position: refs/heads/master@{#37217}
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}
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}
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}
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.
BUG=v8:5072
Review-Url: https://codereview.chromium.org/2056633002
Cr-Commit-Position: refs/heads/master@{#37086}
As a first step towards showing builtin frames in stack traces, we will now
push target and new target unconditionally.
Since the various specializations of BuiltinArguments are made redundant by
this change, we can remove them and all related code.
R=bmeurer@chromium.org
BUG=
Review-Url: https://codereview.chromium.org/2074063002
Cr-Commit-Position: refs/heads/master@{#37061}
Disassembler:
added decoding of a few instructions that were previously unsupported, fixed the decoding of pextr.
Assembler:
pmulld(XMMRegister, Operand) was actually emitting a pmuludq.
punpckldq(XMMRegister, XMMRegister) was implemented a second time as punpackldq.
BUG=
Review-Url: https://codereview.chromium.org/2070863002
Cr-Commit-Position: refs/heads/master@{#37059}
This adds a new BUILTIN frame type, which supports variable number of
arguments for builtins implemented in hand-written native code (we will
extend this mechanism to TurboFan builtins at some point). Convert the
Math.max and Math.min builtins to construct a BUILTIN frame if required.
This does not yet work for C++ builtins, but that'll be the next step.
R=bmeurer@chromium.org, jarin@chromium.org
BUG=v8:4815
LOG=n
Review-Url: https://codereview.chromium.org/2069423002
Cr-Commit-Position: refs/heads/master@{#37051}
Import base::ieee754::exp() from FreeBSD msun and introduce a Float64Exp
TurboFan operator based on that, similar to what we do for Float64Log.
Rewrite Math.exp() as TurboFan builtin and use that operator to also
inline Math.exp() into optimized TurboFan functions.
CQ_INCLUDE_TRYBOTS=tryserver.chromium.linux:linux_chromium_rel_ng;tryserver.blink:linux_blink_rel
BUG=v8:3266,v8:3468,v8:3493,v8:5086,v8:5108,chromium:620786
R=mvstanton@chromium.org
Committed: https://crrev.com/93e26314afc9da9b5b8bd998688262444ed73260
Review-Url: https://codereview.chromium.org/2077533002
Cr-Original-Commit-Position: refs/heads/master@{#37037}
Cr-Commit-Position: refs/heads/master@{#37047}
Reason for revert:
[Sheriff] Leads to some different rounding as it seems in some audio layout tests. Please rebase upstream first if intended:
https://build.chromium.org/p/client.v8.fyi/builders/V8-Blink%20Linux%2064/builds/7508
Original issue's description:
> [builtins] Introduce proper Float64Exp operator.
>
> Import base::ieee754::exp() from FreeBSD msun and introduce a Float64Exp
> TurboFan operator based on that, similar to what we do for Float64Log.
> Rewrite Math.exp() as TurboFan builtin and use that operator to also
> inline Math.exp() into optimized TurboFan functions.
>
> BUG=v8:3266,v8:3468,v8:3493,v8:5086,v8:5108
> R=mvstanton@chromium.org
>
> Committed: https://crrev.com/93e26314afc9da9b5b8bd998688262444ed73260
> Cr-Commit-Position: refs/heads/master@{#37037}
TBR=mvstanton@chromium.org,ahaas@chromium.org,bmeurer@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=v8:3266,v8:3468,v8:3493,v8:5086,v8:5108
Review-Url: https://codereview.chromium.org/2070813002
Cr-Commit-Position: refs/heads/master@{#37039}
Import base::ieee754::exp() from FreeBSD msun and introduce a Float64Exp
TurboFan operator based on that, similar to what we do for Float64Log.
Rewrite Math.exp() as TurboFan builtin and use that operator to also
inline Math.exp() into optimized TurboFan functions.
BUG=v8:3266,v8:3468,v8:3493,v8:5086,v8:5108
R=mvstanton@chromium.org
Review-Url: https://codereview.chromium.org/2077533002
Cr-Commit-Position: refs/heads/master@{#37037}
LoadICState was used to hold the TypeofMode flag which is relevant only for LoadGlobalIC.
This CL removes usage of this state from LoadIC and KeyedLoadIC and renames the state
class to LoadGlobalICState.
BUG=chromium:576312
LOG=Y
Review-Url: https://codereview.chromium.org/2065373003
Cr-Commit-Position: refs/heads/master@{#37033}
The new approach is that instead of compiling custom handlers for
every global object's PropertyCell it uses single dispatcher that
caches PropertyCells in respective slot of the feedback vector.
Currently the new LoadGlobalIC machinery is disabled.
This CL also removes unused LoadGlobalViaContext* stuff.
BUG=chromium:576312
LOG=Y
Review-Url: https://codereview.chromium.org/2065113002
Cr-Commit-Position: refs/heads/master@{#37002}
Support for relocatable globals, to facilitate compilation before
instantiation.
BUG=v8:5072
Review-Url: https://codereview.chromium.org/2062003002
Cr-Commit-Position: refs/heads/master@{#36978}
This fixes FastNewStrictArgumentsStub and FastNewRestParameterStub to no
longer assume that the strict arguments object being allocated will fit
into new-space. The case where said object needs to move to large object
space is now handled in the runtime.
R=bmeurer@chromium.org
TEST=mjsunit/regress/regress-crbug-614727
BUG=chromium:614727
Review-Url: https://codereview.chromium.org/2054853002
Cr-Commit-Position: refs/heads/master@{#36917}
Instead, always tail call to the runtime. Also, cleanup the various versions
of the runtime call that is used for Array construction fallback. There can be
only one.
BUG=chromium:608675
LOG=N
Review-Url: https://codereview.chromium.org/2024253002
Cr-Commit-Position: refs/heads/master@{#36888}
This makes sure we do not compile ToNumber stub on demand. This makes it
easier to use during concurrent compilation.
Review-Url: https://codereview.chromium.org/2051113002
Cr-Commit-Position: refs/heads/master@{#36870}
Since some builtins use StringToNumberStub (so the code is always there),
it makes more sense to have StringToNumber builtin.
Review-Url: https://codereview.chromium.org/2050853003
Cr-Commit-Position: refs/heads/master@{#36843}
This speeds up .bind by >10x as measured by
function f(a,b,c) {}
for (var i = 0; i < 10000000; i++) {
f.bind(1); // or more arguments.
}
(Uses hydrogen-stubs rather than TF due to var-args + possible runtime fallback, which is still unsupported in TF.)
BUG=
Review-Url: https://codereview.chromium.org/2044113002
Cr-Commit-Position: refs/heads/master@{#36817}
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=chromium:615831
Review-Url: https://codereview.chromium.org/2031123003
Cr-Commit-Position: refs/heads/master@{#36786}
Passing in the isolate and pointer compare the instnance against the
corresponding constant is always faster than decoding the instance types.
BUG=
Review-Url: https://codereview.chromium.org/2028983002
Cr-Commit-Position: refs/heads/master@{#36744}
This CL introduces a DECLARE_DEFAULT_DESCRIPTOR macro that helps defining a CallInterfaceDescriptor in a cases where it is not important which registers to use for passing arguments. One can use such descriptors for new TurboFan stubs.
HasPropertyDescriptor now uses the new machinery.
Review-Url: https://codereview.chromium.org/2002143002
Cr-Commit-Position: refs/heads/master@{#36675}
The idea is to make it easier (cheaper) to call into C/C++ directly with
C calling conventions, which require xmm0 to be used to pass and return
floating point values in the future.
R=jarin@chromium.org
Review-Url: https://codereview.chromium.org/2023763010
Cr-Commit-Position: refs/heads/master@{#36646}
This was initially used to special case some weird date.js behavior, but
has since been abused in other areas. In case of the string character
access, everything that is outside the Smi range cannot be a valid
string index anyways, so %NumberToSmi is perfect here in either case,
and for ToPositiveInteger it's better to just use ToInteger adding +0 to
turn -0 into +0.
R=ishell@chromium.org
BUG=v8:5049
Review-Url: https://codereview.chromium.org/2010183003
Cr-Commit-Position: refs/heads/master@{#36545}
We get less "pollution" of type feedback if we have one vector per native
context, rather than one for the whole system. This CL moves the vector
appropriately.
BUG=
Review-Url: https://codereview.chromium.org/1906823002
Cr-Commit-Position: refs/heads/master@{#36539}
For cross-compiler-compatibility and standards compliance %p
requires a void*, rather than any pointer type.
BUG=chromium:474921
Review-Url: https://codereview.chromium.org/2001073002
Cr-Commit-Position: refs/heads/master@{#36466}
We cannot tier up from interpreted to baseline code when there is an
activation of the function on the stack. This significantly regresses
the performance of recursive functions since they are unlikely to get
tiered up.
This CL adds the ability for a function to be marked for baseline
compilation when it returns. To do this we patch the
InterpreterEntryTrampoline return address to point to
InterpreterMarkBaselineOnReturn, which leaves the
interpreted frame and recompile the function for
baseline.
This improves the score of EarlyBoyer by ~8x for Ignition.
BUG=v8:4280
LOG=N
Review-Url: https://codereview.chromium.org/1965343002
Cr-Commit-Position: refs/heads/master@{#36360}
In order to support compiling to baseline on return we need to be able to
return to the actual return address. With this change this is what the
Return bytecode now does, removing the need for the
InterpreterExitTrampoline.
This change also removes the InterpreterNotifyDeoptXXX builtins and
unifies FCG and Igntion to both use NotifyDeoptXXX. As part of this
change, FullCodegenerator::State is moved to Deoptimize::BailoutState.
BUG=v8:4280
LOG=N
Committed: https://crrev.com/34c9626e2ee56fe805de549697ca5323aed7cb66
Cr-Commit-Position: refs/heads/master@{#36288}
Review-Url: https://codereview.chromium.org/1969423002
Cr-Commit-Position: refs/heads/master@{#36310}
Reason for revert:
Breaks
https://build.chromium.org/p/client.v8.ports/builders/V8%20Linux%20-%20arm%20-%20sim/builds/619
Might only affect pure release builds?
Original issue's description:
> [Interpreter] Remove InterpreterExitTrampoline and replace with returning to the entry trampoline.
>
> In order to support compiling to baseline on return we need to be able to
> return to the actual return address. With this change this is what the
> Return bytecode now does, removing the need for the
> InterpreterExitTrampoline.
>
> This change also removes the InterpreterNotifyDeoptXXX builtins and
> unifies FCG and Igntion to both use NotifyDeoptXXX. As part of this
> change, FullCodegenerator::State is moved to Deoptimize::BailoutState.
>
> BUG=v8:4280
> LOG=N
>
> Committed: https://crrev.com/34c9626e2ee56fe805de549697ca5323aed7cb66
> Cr-Commit-Position: refs/heads/master@{#36288}
TBR=mstarzinger@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=v8:4280
Review-Url: https://codereview.chromium.org/1986353002
Cr-Commit-Position: refs/heads/master@{#36294}
In order to support compiling to baseline on return we need to be able to
return to the actual return address. With this change this is what the
Return bytecode now does, removing the need for the
InterpreterExitTrampoline.
This change also removes the InterpreterNotifyDeoptXXX builtins and
unifies FCG and Igntion to both use NotifyDeoptXXX. As part of this
change, FullCodegenerator::State is moved to Deoptimize::BailoutState.
BUG=v8:4280
LOG=N
Review-Url: https://codereview.chromium.org/1969423002
Cr-Commit-Position: refs/heads/master@{#36288}
This adds back the instanceof operator support in the backends and
introduces a @@hasInstance protector cell on the isolate that guards the
fast path for the InstanceOfStub. This way we recover the ~10%
regression on Octane EarleyBoyer in Crankshaft and greatly improve
TurboFan and Ignition performance of instanceof.
R=ishell@chromium.orgTBR=hpayer@chromium.org,rossberg@chromium.org
BUG=chromium:597249, v8:4447
LOG=n
Review-Url: https://codereview.chromium.org/1980483003
Cr-Commit-Position: refs/heads/master@{#36275}
This makes the profiler reconstruct inlined function frames at eager
deopt points from the deoptimization data. The main goal of this is to
remove the last side-channel where Crankshaft communicates directly to
the profiler. This is the last preparatory step towards deprecating the
side-channel in question.
R=yangguo@chromium.org
Review-Url: https://codereview.chromium.org/1973993002
Cr-Commit-Position: refs/heads/master@{#36229}
The previous approach taken by FastNew[Sloppy,Strict,Rest]ArgumentsStub
looked at the function slot in order to skip stub frames
and find the JS frame. However, stub frames do not have a
function slot (in fact their fixed frame ends one slot
before the JS frame's function slot). Therefore, if this
location in the stub frame happens to have the function
object the create arguments stubs won't skip this frame
correctly.
Replace this approach with one where the stub is
specialized to either skip a frame if required (since
there will only ever be one extra frame on Ignition
the loop approach isn't necessary).
BUG=v8:4928
LOG=N
CQ_INCLUDE_TRYBOTS=tryserver.v8:v8_linux_nosnap_dbg
Review-Url: https://codereview.chromium.org/1949023003
Cr-Commit-Position: refs/heads/master@{#36181}
This passes the inlining_id of deoptimization points via the relocation
info instead of via a side-channel to the CPU profiler. This is one step
towards deprecating the side-channel in question and avoid the need for
performing a lookup of the return address of the deopt point.
R=jarin@chromium.org
Review-Url: https://codereview.chromium.org/1956693002
Cr-Commit-Position: refs/heads/master@{#36177}
Rather than pushing zero for the initial bytecode offset, we should push the
offset of the first bytecode handler, Smi tagged. This fixes the line number
for the top stack frame on overflow errors.
BUG=v8:4981
LOG=N
Review-Url: https://codereview.chromium.org/1950913004
Cr-Commit-Position: refs/heads/master@{#36137}
The new allocation folding implementation avoids fragmentation between folded allocation. As a consequence, our heap will always be iterable i.e. we do not have to perform a garbage collection before iterating the heap.
BUG=chromium:580959
LOG=n
Review-Url: https://codereview.chromium.org/1899813003
Cr-Commit-Position: refs/heads/master@{#36133}
This adds a new pass MemoryOptimizer that walks over the effect chain
from Start and lowers all Allocate, LoadField, StoreField, LoadElement,
and StoreElement nodes, trying to fold allocations into allocation
groups and eliminate write barriers on StoreField and StoreElement if
possible (i.e. if the object belongs to the current allocation group and
that group allocates in new space).
R=hpayer@chromium.org, jarin@chromium.org
BUG=v8:4931, chromium:580959
LOG=n
Review-Url: https://codereview.chromium.org/1963583004
Cr-Commit-Position: refs/heads/master@{#36128}
Changes some platform specific class names and uses typedefs
to define FloatRegister, DoubleRegister, etc.
This will be needed to do register allocation on ARM/MIPS where
registers combine to form larger registers.
LOG=N
BUG=v8:4124
Review-Url: https://codereview.chromium.org/1954953002
Cr-Commit-Position: refs/heads/master@{#36117}
Assembler::testw(Register, Immediate) and Assembler::testw(const Operand&, Immediate) were emitting only the first 8 bits of a 16-bit immediate, causing unexpected crashes.
This went unnoticed because before http://crrev.com/1948453002 no compiler was using them.
Review-Url: https://codereview.chromium.org/1962563003
Cr-Commit-Position: refs/heads/master@{#36110}
