Reason for revert:
There are crashes on Win32 and Win64 bots.
Original issue's description:
> Extend HasProperty stub with dictionary-mode, string wrapper and double-elements objects support.
>
> This CL also replaces some Branch() usages with GotoIf/GotoUnless.
>
> BUG=v8:2743
> LOG=Y
>
> Committed: https://crrev.com/24066b6df4259b302edfa1db884c479008776a7e
> Cr-Commit-Position: refs/heads/master@{#36657}
TBR=verwaest@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=v8:2743
Review-Url: https://codereview.chromium.org/2028333002
Cr-Commit-Position: refs/heads/master@{#36659}
This CL also replaces some Branch() usages with GotoIf/GotoUnless.
BUG=v8:2743
LOG=Y
Review-Url: https://codereview.chromium.org/1995453002
Cr-Commit-Position: refs/heads/master@{#36657}
This prevents the compiler from optimizing
f64-to-tagged(tagged-to-f64(x)) ==> x
for non-number x (such as undefined).
Review-Url: https://codereview.chromium.org/2027593002
Cr-Commit-Position: refs/heads/master@{#36613}
Adding optional operators for FNeg for WebAssembly, as the current implementation was significantly suboptimal for ARM.
Review-Url: https://codereview.chromium.org/2011303002
Cr-Commit-Position: refs/heads/master@{#36544}
Rewrite decodeURI and decodeURIComponent as builtin functions
and install them in the bootstrapper.
Delete unused runtime functions:
- TruncateString
- NewString
- OneByteSeqStringGetChar
- OneByteSeqStringSetChar
- TwoByteSeqStringGetChar
- TwoByteSeqStringSetChar
Add regression test for decoding large strings. Clusterfuzz detected
a problem with %TruncateString, see
https://bugs.chromium.org/p/chromium/issues/detail?id=612109#c6
This is automatically fixed by this rewrite because %TruncateString
is deleted anyways.
Crude benchmark on 585 decodeURI and decodeURIComponent tests
averaged over five runs:
* builtin functions
real 0m9.69s
user 2m39.8816s
sys 0m12.6398s
* JS functions calling into the runtime e.g., for %TruncateString
real 0m11.0598s
user 3m6.7026s
sys 0m13.5756s
By running:
$ time tools/run-tests.py --arch=x64 --mode=Release --buildbot
test262/built-ins/decodeURI* mjsunit/uri
>>> Running tests for x64.Release
BUG=v8:4912, chromium:612109
R=yangguo@chromium.org, bmeurer@chromium.org
Review-Url: https://codereview.chromium.org/1994733003
Cr-Commit-Position: refs/heads/master@{#36543}
This intrinsic (and the matching runtime entry) are no longer used by
now and can thereby be removed.
BUG=v8:5049
Review-Url: https://codereview.chromium.org/2016993003
Cr-Commit-Position: refs/heads/master@{#36540}
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}
Caching nodes with mutable inputs is a bad idea and already blew up
twice now, so in order to avoid further breakage, let's kill the
EmptyFrameState caching on JSGraph completely and only cache the empty
state values there.
We can remove the hacking from JSTypedLowering completely once we have
the PlainPrimitiveToNumber in action.
R=jarin@chromium.org
Review-Url: https://codereview.chromium.org/2006423003
Cr-Commit-Position: refs/heads/master@{#36511}
Sequences like:
1: Load[kRepWord32|kTypeInt32](<address>, ...)
2: Word32And(1, <constant>)
3: Word32Equal(2, <another constant>)
4: Store[(kRepWord32 : NoWriteBarrier)](<address>, <value>)
5: Branch[None](3, ...) -> B1, B2
where #1 and #4 refer to the same memory location, are problematic because in VisitBranch we assume that 'InstructionSelector::CanCover()' is transitive.
What happens is that CanCover(5, 3) is true (3 is a pure op), and so are CanCover(3, 2), CanCover(2, 1), but the effect level of 5 and 3 never gets checked because 3 is a pure op. Upon VisitBranch, we ended up materializing:
mov [address], <value>
test [address], <another constant>
With this patch, it becomes:
mov reg, [address]
mov [address], <value>
test reg, <another constant>
BUG=chromium:611976
Review-Url: https://codereview.chromium.org/2008493002
Cr-Commit-Position: refs/heads/master@{#36482}
Reason for revert:
Breaks a KCS demo:
BUG=chromium:611976
Original issue's description:
> [turbofan] Take the immediate size in account when narrowing ia32/x64 word comparison operators.
>
> Trying to re-land http://crrev.com/1948453002 after fixing assembler-x64.cc in http://crrev.com/1962563003.
>
> Before this patch, we would emit a cmp or test with a memory operand only if both of the operands in the IR were loads. Now if either of them is a load and the other one is an immediate, we can use a memory operand if the load representation machine size is wide enough to represent the latter.
>
> Committed: https://crrev.com/2da70f853d7f680d491c37c72d5ef04a85497ba9
> Cr-Commit-Position: refs/heads/master@{#36136}
TBR=bmeurer@chromium.org,epertoso@chromium.org
# Not skipping CQ checks because original CL landed more than 1 days ago.
Review-Url: https://codereview.chromium.org/1995303003
Cr-Commit-Position: refs/heads/master@{#36413}
Previously, CodeStubAssembler macros performing FixedArray element accesses had
to compute offsets to elements explicitly with a fair amount of duplicated
code. Furthermore, any peephole optimizations that could produce better code--
like recognizing constant indices or combining array index computation with Smi
untagging--were also duplicated.
This change factors the code to compute FixedArray index offsets into a common
routine in the CodeStubAssembler that applies standard peephole optimizations to
all accesses. In order to do this, it also introduces limited introspection into
the up-until-now opaque Node* type exported from code-assembler.h, allowing
Nodes to be queried whether they are constant and extracting their constant
value in that case.
Review-Url: https://codereview.chromium.org/1989363004
Cr-Commit-Position: refs/heads/master@{#36370}
Renames IsDouble* predicates to IsFP*.
Adds specific IsFloat*, IsDouble*, and IsSimd128* predicates.
Adds specific GetFloatRegister, GetDoubleRegister, and
GetSimd128Register methods.
This is mostly a mechanical renaming of IsDouble* to IsFP* methods.
This shouldn't change code generation at all. All fp registers are still
treated as double registers.
LOG=N
BUG=v8:4124
Review-Url: https://codereview.chromium.org/1959763002
Cr-Commit-Position: refs/heads/master@{#36146}
Trying to re-land http://crrev.com/1948453002 after fixing assembler-x64.cc in http://crrev.com/1962563003.
Before this patch, we would emit a cmp or test with a memory operand only if both of the operands in the IR were loads. Now if either of them is a load and the other one is an immediate, we can use a memory operand if the load representation machine size is wide enough to represent the latter.
Review-Url: https://codereview.chromium.org/1968453002
Cr-Commit-Position: refs/heads/master@{#36136}
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}
Now that everything is properly wired to the effect chain when we get to
ChangeLowering, we can safely inline the allocation fast path and only
need to consule the slow path stub fallback when bump pointer allocation
fails.
R=jarin@chromium.org
BUG=v8:4931
LOG=n
Review-Url: https://codereview.chromium.org/1951853002
Cr-Commit-Position: refs/heads/master@{#36022}
Reason for revert:
Jakob found the actual issue with the CL and is going to land the fix after relanding the WB elimination.
Original issue's description:
> Revert of [turbofan] Restore basic write barrier elimination. (patchset #2 id:20001 of https://codereview.chromium.org/1938993002/ )
>
> Reason for revert:
> Breaks WBs that should be there ;)
>
> https://uberchromegw.corp.google.com/i/client.v8/builders/V8%20Linux%20-%20gc%20stress/builds/3305
>
> Will open repro bug asap.
>
> Original issue's description:
> > [turbofan] Restore basic write barrier elimination.
> >
> > Restore the basic write barrier elimination that we used to run as part
> > of the simplified lowering phase (in ChangeLowering actually) before, by
> > moving the write barrier computation to SimplifiedLowering where we can
> > still look at types and consider the heap/isolate, and just update the
> > WriteBarrierKind in the FieldAccess/ElementAccess that we later use when
> > lowering to a machine Load/Store.
> >
> > CQ_INCLUDE_TRYBOTS=tryserver.v8:v8_linux64_tsan_rel
> > R=mstarzinger@chromium.org
> > BUG=v8:4969,chromium:608636
> > LOG=n
> >
> > Committed: https://crrev.com/7dcb6ad379fbacbc8bdc8e11a6e50d680ffa3f62
> > Cr-Commit-Position: refs/heads/master@{#35969}
>
> TBR=mstarzinger@chromium.org,bmeurer@chromium.org
> # Skipping CQ checks because original CL landed less than 1 days ago.
> NOPRESUBMIT=true
> NOTREECHECKS=true
> NOTRY=true
> BUG=v8:4969,chromium:608636
>
> Committed: https://crrev.com/a782e93c617e728cded5ad878de11137a67891b7
> Cr-Commit-Position: refs/heads/master@{#35983}
TBR=mstarzinger@chromium.org,bmeurer@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=v8:4969,chromium:608636
Review-Url: https://codereview.chromium.org/1943323002
Cr-Commit-Position: refs/heads/master@{#35984}
Reason for revert:
Breaks WBs that should be there ;)
https://uberchromegw.corp.google.com/i/client.v8/builders/V8%20Linux%20-%20gc%20stress/builds/3305
Will open repro bug asap.
Original issue's description:
> [turbofan] Restore basic write barrier elimination.
>
> Restore the basic write barrier elimination that we used to run as part
> of the simplified lowering phase (in ChangeLowering actually) before, by
> moving the write barrier computation to SimplifiedLowering where we can
> still look at types and consider the heap/isolate, and just update the
> WriteBarrierKind in the FieldAccess/ElementAccess that we later use when
> lowering to a machine Load/Store.
>
> CQ_INCLUDE_TRYBOTS=tryserver.v8:v8_linux64_tsan_rel
> R=mstarzinger@chromium.org
> BUG=v8:4969,chromium:608636
> LOG=n
>
> Committed: https://crrev.com/7dcb6ad379fbacbc8bdc8e11a6e50d680ffa3f62
> Cr-Commit-Position: refs/heads/master@{#35969}
TBR=mstarzinger@chromium.org,bmeurer@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=v8:4969,chromium:608636
Review-Url: https://codereview.chromium.org/1943743003
Cr-Commit-Position: refs/heads/master@{#35983}
Restore the basic write barrier elimination that we used to run as part
of the simplified lowering phase (in ChangeLowering actually) before, by
moving the write barrier computation to SimplifiedLowering where we can
still look at types and consider the heap/isolate, and just update the
WriteBarrierKind in the FieldAccess/ElementAccess that we later use when
lowering to a machine Load/Store.
CQ_INCLUDE_TRYBOTS=tryserver.v8:v8_linux64_tsan_rel
R=mstarzinger@chromium.org
BUG=v8:4969,chromium:608636
LOG=n
Review-Url: https://codereview.chromium.org/1938993002
Cr-Commit-Position: refs/heads/master@{#35969}
Now ChangeLowering is only concerned with lowering memory access and
allocation operations, and all changes are consistently lowered during
the effect/control linearization pass. The next step is to move the
left over lowerings to a pass dedicated to eliminate redundant loads and
stores, eliminate write barriers, fold and inline allocations.
Drive-by-fix: Rename ChangeBitToBool to ChangeBitToTagged,
ChangeBoolToBit to ChangeTaggedToBit, and ChangeInt31ToTagged to
ChangeInt31ToTaggedSigned for consistency.
CQ_INCLUDE_TRYBOTS=tryserver.v8:v8_linux64_tsan_rel
Committed: https://crrev.com/ceca5ae308bddda166651c654f96d71d74f617d0
Cr-Commit-Position: refs/heads/master@{#35924}
Review-Url: https://codereview.chromium.org/1941673002
Cr-Commit-Position: refs/heads/master@{#35929}
Reason for revert:
[Sheriff] Breaks mac gc stress:
https://build.chromium.org/p/client.v8/builders/V8%20Mac%20GC%20Stress/builds/5821
Original issue's description:
> [turbofan] Remove left-over change bits from ChangeLowering.
>
> Now ChangeLowering is only concerned with lowering memory access and
> allocation operations, and all changes are consistently lowered during
> the effect/control linearization pass. The next step is to move the
> left over lowerings to a pass dedicated to eliminate redundant loads and
> stores, eliminate write barriers, fold and inline allocations.
>
> Also remove the atomic regions now that we wire everything into the
> effect chain properly. This is an important step towards allocation
> inlining.
>
> Drive-by-fix: Rename ChangeBitToBool to ChangeBitToTagged,
> ChangeBoolToBit to ChangeTaggedToBit, and ChangeInt31ToTagged to
> ChangeInt31ToTaggedSigned for consistency.
>
> CQ_INCLUDE_TRYBOTS=tryserver.v8:v8_linux64_tsan_rel
>
> Committed: https://crrev.com/ceca5ae308bddda166651c654f96d71d74f617d0
> Cr-Commit-Position: refs/heads/master@{#35924}
TBR=ishell@chromium.org,bmeurer@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/1942733002
Cr-Commit-Position: refs/heads/master@{#35927}
Now ChangeLowering is only concerned with lowering memory access and
allocation operations, and all changes are consistently lowered during
the effect/control linearization pass. The next step is to move the
left over lowerings to a pass dedicated to eliminate redundant loads and
stores, eliminate write barriers, fold and inline allocations.
Also remove the atomic regions now that we wire everything into the
effect chain properly. This is an important step towards allocation
inlining.
Drive-by-fix: Rename ChangeBitToBool to ChangeBitToTagged,
ChangeBoolToBit to ChangeTaggedToBit, and ChangeInt31ToTagged to
ChangeInt31ToTaggedSigned for consistency.
CQ_INCLUDE_TRYBOTS=tryserver.v8:v8_linux64_tsan_rel
Review-Url: https://codereview.chromium.org/1941673002
Cr-Commit-Position: refs/heads/master@{#35924}
Further refactor the pipeline to even run the first scheduler (part of
the effect control linearization) concurrently. This temporarily
disables most of the write barrier elimination, but we will get back to
that later.
Drive-by-fix: Remove the dead code from ChangeLowering, and stack
allocate the Typer in the pipeline. Also migrate the AllocateStub to a
native code builtin, so that we have the code object + a handle to it
available all the time.
CQ_INCLUDE_TRYBOTS=tryserver.v8:v8_linux64_tsan_rel
R=mstarzinger@chromium.org
BUG=v8:4969
LOG=n
Review-Url: https://codereview.chromium.org/1926023002
Cr-Commit-Position: refs/heads/master@{#35918}
This adds a dedicated flag for enabling the BytecodeGraphBuilder. The
intention is to be explicit when this variant is being tested and to
avoid unnecessary overhead in production code for a configuration that
is not yet shipping.
R=rmcilroy@chromium.org
Review-Url: https://codereview.chromium.org/1925123002
Cr-Commit-Position: refs/heads/master@{#35892}
Further refactor the pipeline to even run the first scheduler (part of
the effect control linearization) concurrently. This temporarily
disables most of the write barrier elimination, but we will get back to
that later.
Review-Url: https://codereview.chromium.org/1926023002
Cr-Commit-Position: refs/heads/master@{#35861}
This makes sure that the testing pipeline withing the FunctionTester
class only performs AST analysis and deoptimization preparation when
graphs are generated from the AST (as opposed to from bytecode).
R=yangguo@chromium.org
Review-Url: https://codereview.chromium.org/1928523002
Cr-Commit-Position: refs/heads/master@{#35827}
These also lower to subgraphs that have to be connected to the effect
and control chains, otherwise removing the atomic regions around heap
allocations would still be unsound.
R=jarin@chromium.org
Review URL: https://codereview.chromium.org/1916763003
Cr-Commit-Position: refs/heads/master@{#35762}
This allows us to get rid of the "push TruncateFloat64ToInt32 into Phi"
trick that was used in the MachineOperatorReducer to combine the
ChangeTaggedToFloat64 and TruncateFloat64ToInt32 operations. Instead of
doing that later, we can just introduce the proper operator during the
representation selection directly.
Also separate the TruncateFloat64ToInt32 machine operator, which had two
different meanings depending on a flag (either JavaScript truncation or
C++ style round to zero). Now there's a TruncateFloat64ToWord32 which
represents the JavaScript truncation (implemented via TruncateDoubleToI
macro + code stub) and the RoundFloat64ToInt32, which implements the C++
round towards zero operation (in the same style as the other WebAssembly
driven Round* machine operators).
R=jarin@chromium.org
Review URL: https://codereview.chromium.org/1919513002
Cr-Commit-Position: refs/heads/master@{#35743}
Get rid of further typing checks from ChangeLowering and put them into
the representation selection pass instead (encoding the information in
the operator instead).
Drive-by-change: Rename ChangeSmiToInt32 to ChangeTaggedSignedToInt32
for consistency about naming Tagged, TaggedSigned and TaggedPointer.
R=jarin@chromium.org
Review URL: https://codereview.chromium.org/1909343002
Cr-Commit-Position: refs/heads/master@{#35723}
If we have to convert a float64 value to tagged representation and we
already know that the value is either in Signed31/Signed32 or
Unsigned32 range, then we can just convert the float64 to word32 and
use the fast word32 to tagged conversion. Doing this in
ChangeLowering (or the effect linearization pass) would be unsound, as
the types on the nodes are no longer usable.
This removes all Type uses from effect linearization. There's still some
work to be done for ChangeLowering tho.
R=jarin@chromium.org
Review URL: https://codereview.chromium.org/1908093002
Cr-Commit-Position: refs/heads/master@{#35713}
The CL #35651 (https://codereview.chromium.org/1858323003) exposed one hiden issue in RunTruncateFloat32ToUint32 test cases and X87 failed at it.
Here is the issue in RunTruncateFloat32ToUint32:
For float input = static_cast<float>(*i), the x87 GCC would optimize the input viariable in float floating register for release build.
The problem is:
SSE float register has single precision rounding semantic While X87 register hasn't when directly use floating register value. It will cause the value of input viariable has
different precision for IA32 and X87 port. So static_cast<uint32_t>(input) will be different for IA32 and X87 port too.
This led to CHECK_EQ(static_cast<uint32_t>(input), m.Call(input)) fail although V8 turbofan JITTed code m.Call(input) has exactly same result in both X87 and IA32 port.
So we add the following sentence to do type cast to keep the single precision for RunTruncateFloat32ToUint32 by forcing the input viariable get value from memory insread of
floating register.
Such as: volatile float input = static_cast<float>(*i).
BUG=
Review URL: https://codereview.chromium.org/1905883002
Cr-Commit-Position: refs/heads/master@{#35689}
This patch provides a new implementation of popcnt and ctz in the case
where the platform does not provide these instructions. Instead of
building a TF graph which implements it we now call a C function.
Additionally I turned on additional tests in test-run-wasm-64.cc
R=titzer@chromium.org
Review URL: https://codereview.chromium.org/1857363003
Cr-Commit-Position: refs/heads/master@{#35685}
Also factor out test cases from test-run-machops.cc into test-run-load-store.cc
BUG=chromium:599717
LOG=Y
Review URL: https://codereview.chromium.org/1858323003
Cr-Commit-Position: refs/heads/master@{#35651}
This disables parsing when we optimize directly from bytecode using
TurboFan, because TurboFan is capable of building graphs out of the
bytecode directly.
R=bmeurer@chromium.org
BUG=v8:4280
LOG=n
Review URL: https://codereview.chromium.org/1891663004
Cr-Commit-Position: refs/heads/master@{#35567}
We had exactly one test case for --noturbo-types, so it's likely that
the generic pipeline (without types) was already broken for quite some
time, plus no one expressed interest in maintaining it, plus it
complicates the JSGenericLowering integration. So decision is to kill
it.
R=jarin@chromium.org
Review URL: https://codereview.chromium.org/1872333002
Cr-Commit-Position: refs/heads/master@{#35387}
The parser should never need to look at the underlying closure object,
hence the field can be moved from ParseInfo into CompilationInfo.
R=rossberg@chromium.org
Review URL: https://codereview.chromium.org/1863083002
Cr-Commit-Position: refs/heads/master@{#35358}
AddInt + WordShl cases can be optimized on MIPS and this CL contains
tests for those special cases. These test also must be passed on other
architectures.
BUG=
Review URL: https://codereview.chromium.org/1867923002
Cr-Commit-Position: refs/heads/master@{#35349}
This particularly changes the StackTraceFrameIterator such that is not
only returs JavaScriptFrames, but also WasmFrames. Because of that,
some methods (Summarize, function, receiver) were pulled up to the
StandardFrame, with specializations in JavaScriptFrame and WasmFrame.
R=jfb@chromium.org, titzer@chromium.org
BUG=
Review URL: https://codereview.chromium.org/1861283002
Cr-Commit-Position: refs/heads/master@{#35293}
1) I moved the implementations of the wrapper functions into a new cc
file so that I can use these wrapper functions in tests.
2) I made a generic test for all tests in
test-run-calls-to-external-references.cc. In the new test we only
compare the result of a function call through an external reference with
the result of a direct function call. This is sufficient because we only
want to test function calls through external references work here.
The implementation of these functions are tested somewhere else.
R=titzer@chromium.org
Review URL: https://codereview.chromium.org/1853123002
Cr-Commit-Position: refs/heads/master@{#35289}
This allows us to remove the troublesome %_MathClz32 intrinsic and also
allows us to utilize the functionality that is already available in
TurboFan. Also introduce a proper NumberClz32 operator so we don't need
to introduce a machine operator at the JS level.
R=epertoso@chromium.org
Review URL: https://codereview.chromium.org/1852553003
Cr-Commit-Position: refs/heads/master@{#35208}
We expect that the majority of malloc'd memory held by V8 is allocated
in Zone objects. Introduce an Allocator class that is used by Zones to
manage memory, and allows for querying the current usage.
BUG=none
R=titzer@chromium.org,bmeurer@chromium.org,jarin@chromium.org
LOG=n
TBR=rossberg@chromium.org
Review URL: https://codereview.chromium.org/1847543002
Cr-Commit-Position: refs/heads/master@{#35196}
Migrate Math.ceil, Math.round and Math.trunc to TurboFan code stubs,
similar to what we did with Math.floor, and make these builtins properly
optimizable in TurboFan via appropriate simplified operators NumberCeil,
NumberRound and NumberTrunc, which are intended to be reusable for
ToInteger and ToLength optimizations that will be done in a followup CL.
Also allows us to kill the funky %RoundNumber runtime function, which
was quite heavy.
Improve test coverage for Math.ceil and Math.trunc a lot, especially
making sure that we also properly trigger the TurboFan builtin reducer
case.
R=jarin@chromium.org
BUG=v8:4059
LOG=n
Review URL: https://codereview.chromium.org/1841993002
Cr-Commit-Position: refs/heads/master@{#35135}
Int64Mul is lowered to a new turbofan operator, Int32MulPair. The new
operator takes 4 inputs an generates 2 outputs. The inputs are the low
word of the left input, high word of the left input, the low word of the
right input, and high word of the right input. The ouputs are the low
and high word of the result of the multiplication.
R=titzer@chromium.org, v8-arm-ports@googlegroups.com
Review URL: https://codereview.chromium.org/1807273002
Cr-Commit-Position: refs/heads/master@{#35131}
This way we avoid the second deoptimization for the Math.floor and
Math.ceil builtins when -0 is involved. We still deoptimize the inlined
Crankshaft version in various cases, that's a separate issue.
The algorithm used for implement CodeStubAssembler::Float64Floor is
vaguely based on the fast math version used in the libm of various BSDs,
but had to be reengineered to match the EcmaScript specification.
R=epertoso@chromium.org
BUG=v8:2890, v8:4059
LOG=n
Review URL: https://codereview.chromium.org/1828253002
Cr-Commit-Position: refs/heads/master@{#35083}
Makes --ignition cause eager compilation if we aren't building the startup
snapshot.
BUG=v8:4280
LOG=N
Review URL: https://codereview.chromium.org/1811553003
Cr-Commit-Position: refs/heads/master@{#35066}
Reason for revert:
Makes nosnap bots timeout due to having to rebuild bytecode handlers.
Original issue's description:
> [Interpreter] Remove separate Ignition snapshot.
>
> Removes the seperate Ignition snapshot and build the Ignition bytecode
> handlers in the default snapshot.
>
> BUG=v8:4280
> LOG=N
>
> Committed: https://crrev.com/1798f3fe84faff32ba44e09f6aed79245dd98d80
> Cr-Commit-Position: refs/heads/master@{#35058}
TBR=machenbach@google.com,yangguo@chromium.org,mstarzinger@chromium.org,machenbach@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/1827143002
Cr-Commit-Position: refs/heads/master@{#35059}
Removes the seperate Ignition snapshot and build the Ignition bytecode
handlers in the default snapshot.
BUG=v8:4280
LOG=N
Review URL: https://codereview.chromium.org/1833643002
Cr-Commit-Position: refs/heads/master@{#35058}
Introduce TruncateTaggedToFloat64 and TruncateTaggedToWord32 into the
CodeStubAssembler, which encapsulates the ToNumber truncation and
returns the resulting number as either Float64 or further truncated to
Word32.
R=jarin@chromium.org
BUG=v8:4587
LOG=n
Review URL: https://codereview.chromium.org/1827813004
Cr-Commit-Position: refs/heads/master@{#35051}
This CL adds an extra pass before calculating the special RPO
order in the custom RawMachineAssembler pipeline that
walks through the schedule and inserts extra blocks to
guarantee that the control flow graph is in split edge form. It
also propagates deferred block marks forward to these new
blocks if appropriate.
Review URL: https://codereview.chromium.org/1811333002
Cr-Commit-Position: refs/heads/master@{#35014}
Now that ES2015 const has shipped, in Chrome 49, legacy const declarations
are no more. This lets us remove a bunch of code from many parts of the
codebase.
In this patch, I remove parser support for generating legacy const variables
from const declarations. This also removes the special "illegal declaration"
bit from Scope, which has ripples into all compiler backends.
Also gone are any tests which relied on legacy const declarations.
Note that we do still generate a Variable in mode CONST_LEGACY in one case:
function name bindings in sloppy mode. The likely fix there is to add a new
Variable::Kind for this case and handle it appropriately for stores in each
backend, but I leave that for a later patch to make this one completely
subtractive.
Review URL: https://codereview.chromium.org/1819123002
Cr-Commit-Position: refs/heads/master@{#35002}
This CL adds support for builtins with JavaScript linkage written using
the TurboFan CodeStubAssembler, but with a JSCall descriptor (which was
already supported thanks to a previous patch by Ben Smith). As a first
example, we convert the Math.sqrt builtin and thereby get rid of the
%_MathSqrt intrinsic, which causes trouble for the representation
selection pass in the JavaScript pipeline.
R=mstarzinger@chromium.org
Review URL: https://codereview.chromium.org/1824993002
Cr-Commit-Position: refs/heads/master@{#34989}
Introduces a bytecode whose handler executes the equivalent of %_IsArray and %_IsJSReceiver without a runtime call.
BUG=v8:4822
LOG=y
Review URL: https://codereview.chromium.org/1645763003
Cr-Commit-Position: refs/heads/master@{#34983}
The CL also add guard nodes to places where we assume that certain
values are numbers.
Review URL: https://codereview.chromium.org/1821133002
Cr-Commit-Position: refs/heads/master@{#34977}
This was once meant to be used for JavaScript code stubs, but since we
found a better way to do code stubs using TurboFan, we don't need this
runtime entry and intrinsic anymore.
R=jarin@chromium.org
Review URL: https://codereview.chromium.org/1821123002
Cr-Commit-Position: refs/heads/master@{#34976}
Split ToNumberStub into the entry ToNumberStub, and two new stubs,
StringToNumberStub and NonNumberToNumberStub, which can be used when we
already know something about the input (i.e. in various branches of the
code stubs, or in TurboFan graphs).
Also introduce an appropriate StringToNumber simplified operator for
TurboFan, that is pure and is lowered to an invocation of the newly
added StringToNumberStub.
R=jarin@chromium.org
Review URL: https://codereview.chromium.org/1818923002
Cr-Commit-Position: refs/heads/master@{#34922}
Port 33c08596e1
Original commit message:
Int64Sub is lowered to a new turbofan operator, Int32SubPair. The new
operator takes 4 inputs an generates 2 outputs. The inputs are the low
word of the left input, high word of the left input, the low word of the
right input, and high word of the right input. The ouputs are the low
and high word of the result of the subtraction.
The implementation is very similar to the implementation of Int64Add.
R=ahaas@chromium.org, joransiu@ca.ibm.com, jyan@ca.ibm.com, michael_dawson@ca.ibm.com
BUG=
Review URL: https://codereview.chromium.org/1812473002
Cr-Commit-Position: refs/heads/master@{#34821}
Int64Sub is lowered to a new turbofan operator, Int32SubPair. The new
operator takes 4 inputs an generates 2 outputs. The inputs are the low
word of the left input, high word of the left input, the low word of the
right input, and high word of the right input. The ouputs are the low
and high word of the result of the subtraction.
The implementation is very similar to the implementation of Int64Add.
@v8-arm-ports: please take a careful look at the implementation of sbc
in the simulator.
R=titzer@chromium.org, v8-arm-ports@googlegroups.com
Review URL: https://codereview.chromium.org/1778893005
Cr-Commit-Position: refs/heads/master@{#34808}
Updates InlineTwice to declare a function and then return a function
instead of using function expressions by wrapping a function with '('
and ')'. The earlier implementation would cause the function to
compile immediately instead of lazy compile. Also updates cctest.status
BUG=v8:4280,v8:4837,v8:4680
LOG=N
Review URL: https://codereview.chromium.org/1800073002
Cr-Commit-Position: refs/heads/master@{#34790}
On 32-bit systems these instructions are compiled to calls to
C functions. The TF node for the function call is already generated in
the wasm compiler, the lowering of the I64 parameters is done in the
Int64Lowering. We use the return value of the C function to determine
whether the calculation should trap or not.
R=titzer@chromium.org
Review URL: https://codereview.chromium.org/1804513002
Cr-Commit-Position: refs/heads/master@{#34768}
The previous register allocation allowed invalid register aliasing in
cases where in the TF graph the node was used for multiple inputs of the
Word32PairShl node.
Additionally I renamed PairLsl to LslPair in the code generation for
consistency.
R=titzer@chromium.org, v8-arm-ports@googlegroups.com
Review URL: https://codereview.chromium.org/1776393004
Cr-Commit-Position: refs/heads/master@{#34755}
Int64Add is lowered to a new turbofan operator, Int32AddPair. The new
operator takes 4 inputs an generates 2 outputs. The inputs are the low
word of the left input, high word of the left input, the low word of the
right input, and high word of the right input. The ouputs are the low
and high word of the result of the addition.
R=titzer@chromium.org, v8-arm-ports@googlegroups.com
Review URL: https://codereview.chromium.org/1778493004
Cr-Commit-Position: refs/heads/master@{#34747}
On 32-bit systems I64XConvertFXX instructions are compiled to calls to
C functions. The TF node for the function call is already generated in
the wasm compiler, the lowering of the I64 parameter is done in the
Int64Lowering. We use the return value of the C function to determine
whether the conversion should trap or not.
R=titzer@chromium.org
Review URL: https://codereview.chromium.org/1775903002
Cr-Commit-Position: refs/heads/master@{#34738}
This is a pure refactoring and renaming of methods in the compiler API
with the goal to increase readability. Also the compiler API is moved to
the top of the file, as it is the central piece in that file.
R=yangguo@chromium.org
Review URL: https://codereview.chromium.org/1766623004
Cr-Commit-Position: refs/heads/master@{#34579}
Instead of using CheckFloatEq and CheckDoubleEq directly, I introduced
a macro which first stores the expected result in a volatile variable.
Here are some comments of previous CLs:
The reason is same as the CL #31808 (issue 1430943002, X87: Change the test case for X87 float operations), please refer: https://codereview.chromium.org/1430943002/.
Here is the key comments from CL #31808
Some new test cases use CheckFloatEq(...) and CheckDoubleEq(...) function for result check. When GCC compiling the CheckFloatEq() and CheckDoubleEq() function,
those inlined functions has different behavior comparing with GCC ia32 build and x87 build.
The major difference is sse float register still has single precision rounding semantic. While X87 register has no such rounding precsion semantic when directly use register value.
The V8 turbofan JITTed has exactly same result in both X87 and IA32 port.
So we add the following sentence to do type cast to keep the same precision for RunCallInt64ToFloat32/RunCallInt64ToFloat64. Such as: volatile double expect = static_cast<float>(*i).
R=titzer@chromium.org, weiliang.lin@intel.com
Review URL: https://codereview.chromium.org/1773513002
Cr-Commit-Position: refs/heads/master@{#34534}
On 32-bit systems FXXXConvertI64 instructions are compiled to calls to
C functions. The TF node for the function call is already generated in
the wasm compiler, the lowering of the I64 parameter is done in the
Int64Lowering.
R=titzer@chromium.org, yangguo@chromium.org
Review URL: https://codereview.chromium.org/1738623003
Cr-Commit-Position: refs/heads/master@{#34487}
Add StringLessThanStub, StringLessThanOrEqualStub, StringGreaterThanStub
and StringGreaterThanOrEqualStub, based on the CodeStubAssembler, and
hook them up with TurboFan (and Ignition). The stubs are currently
essentially comparable with the StringCompareStub, which is now
obsolete. We can later extend these stubs to cover more interesting
cases (i.e. two byte sequential string comparisons, etc.).
R=epertoso@chromium.org
Review URL: https://codereview.chromium.org/1765823002
Cr-Commit-Position: refs/heads/master@{#34485}
These new stubs perform exactly the same job as the string equality case
for the CompareIC, but are platform independent and usable outside of
fullcodegen and Crankshaft. We use them in the StrictEqualStub and the
StrictNotEqualStub instead of falling back to the runtime immediately
for String comparisons, and we also use them in TurboFan to perform
String equality or inequality comparisons.
These stubs currently handle only internalized and one byte strings w/o
going to C++, but it should be easy to add support for more string cases
later, i.e. utilizing already flattened cons strings or comparing two
byte strings as well.
Review URL: https://codereview.chromium.org/1761823002
Cr-Commit-Position: refs/heads/master@{#34459}
The LoadBuffer operator that is used for asm.js heap access claims to
return only the appropriate typed array type, but out of bounds access
could make it return undefined. So far we tried to "repair" the graph
later if we see that our assumption was wrong, and for various reasons
that worked for some time. But now that wrong type information that is
propagated earlier is picked up appropriately and thus we generate wrong
code, i.e. we in the repro case we feed NaN into ChangeFloat64Uint32 and
thus get 2147483648 instead of 0 (with proper JS truncation).
This was always considered a temporary hack until we have a proper
asm.js pipeline, but since we still run asm.js through the generic
JavaScript pipeline, we have to address this now. Quickfix is to just
bailout from the pipeline when we see that the LoadBuffer type was
wrong, i.e. the result of LoadBuffer is not properly truncated and thus
undefined or NaN would be observable.
R=mstarzinger@chromium.org, jarin@chromium.org
BUG=chromium:589792
LOG=y
Review URL: https://codereview.chromium.org/1740123002
Cr-Commit-Position: refs/heads/master@{#34322}
Migrate Math.imul, Math.fround, Math.acos, Math.asin and Math.atan to
C++ builtins, as these ones call into C++ anyway and so there's no
need to have this extra wrapper around it.
R=yangguo@chromium.org
Review URL: https://codereview.chromium.org/1731543004
Cr-Commit-Position: refs/heads/master@{#34274}
Reason for revert:
It is not a good idea to call CallICStub from the builtin. It might be sensitive to the frame structure. Constructing a internal frame might cause problems. It is much better to inline the code related to the type feedback vector into the builtin.
Original issue's description:
> [Interpreter] Implements calls through CallICStub in the interpreter.
>
> Calls are implemented through CallICStub to collect type feedback. Adds
> a new builtin called InterpreterPushArgsAndCallIC that pushes the
> arguments onto stack and calls CallICStub.
>
> Also adds two new bytecodes CallIC and CallICWide to indicate calls have to
> go through CallICStub.
>
> MIPS port contributed by balazs.kilvady.
>
> BUG=v8:4280, v8:4680
> LOG=N
>
> Committed: https://crrev.com/20362a2214c11a0f2ea5141b6a79e09458939cec
> Cr-Commit-Position: refs/heads/master@{#34244}
TBR=rmcilroy@chromium.org,mvstanton@chromium.org,mstarzinger@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=v8:4280, v8:4680
Review URL: https://codereview.chromium.org/1731253003
Cr-Commit-Position: refs/heads/master@{#34252}
Calls are implemented through CallICStub to collect type feedback. Adds
a new builtin called InterpreterPushArgsAndCallIC that pushes the
arguments onto stack and calls CallICStub.
Also adds two new bytecodes CallIC and CallICWide to indicate calls have to
go through CallICStub.
MIPS port contributed by balazs.kilvady.
BUG=v8:4280, v8:4680
LOG=N
Review URL: https://codereview.chromium.org/1688283003
Cr-Commit-Position: refs/heads/master@{#34244}
The CL #33796 (https://codereview.chromium.org/1628133002) added the RunRoundUint32ToFloat32 test case and X87 failed at it.
The reason is same as the CL #33630 (Issue 1649323002: X87: Change the test case for X87 RunRoundInt32ToFloat32), please refer: https://codereview.chromium.org/1649323002.
Here is the key comments from CL #33630:
Some new test cases use CheckFloatEq(...) and CheckDoubleEq(...) function for result check. When GCC compiling the CheckFloatEq() and CheckDoubleEq() function,
those inlined functions has different behavior comparing with GCC ia32 build and x87 build.
The major difference is sse float register still has single precision rounding semantic. While X87 register has no such rounding precsion semantic when directly use register value.
The V8 turbofan JITTed has exactly same result in both X87 and IA32 port.
For CHECK_EQ(a, b) function, if a and b are doubles, it will has similar behaviors like CheckFloatEq(...) and CheckDoubleEq(...) function when compiled by GCC and causes the test case
fail.
So we add the following sentence to do type case to keep the same precision for RunRoundUint32ToFloat32. Such as: volatile double expect = static_cast<float>(*i).
BUG=
Review URL: https://codereview.chromium.org/1714413002
Cr-Commit-Position: refs/heads/master@{#34202}
Reason for revert:
Tanks benchmarks (e.g., Octane box2d TF).
Original issue's description:
> [turbofan] Connect ObjectIsNumber to effect and control chains.
>
> In theory, we could connect the nodes when doing
> the schedule-in-the-middle pass, but that would require creating two
> versions of the operator (effectful and pure). I believe we do not
> lose anything by wiring the node up eagerly.
>
> Committed: https://crrev.com/2894e80a0a4a51a0d72e72aa48fcd01968f7949f
> Cr-Commit-Position: refs/heads/master@{#34141}
TBR=bmeurer@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/1718483002
Cr-Commit-Position: refs/heads/master@{#34147}
In theory, we could connect the nodes when doing
the schedule-in-the-middle pass, but that would require creating two
versions of the operator (effectful and pure). I believe we do not
lose anything by wiring the node up eagerly.
Review URL: https://codereview.chromium.org/1709093002
Cr-Commit-Position: refs/heads/master@{#34141}
The BufferedRawMachineAssemblerTester caused problems for the
Int64Lowering. Instead we construct a TF graph now which is compiled by
Pipeline::GenerateCodeForTesting.
R=titzer@chromium.org
Review URL: https://codereview.chromium.org/1702023002
Cr-Commit-Position: refs/heads/master@{#34107}
This CL splits up some long-running bytecode graph builder tests.
There's a lot of working going on here that probably should be split
up into smaller tests and/or mjsunit tests once we have the full
ignition pipeline. This one just targets the top offenders for now.
R=rmcilroy@chromium.org, oth@chromium.org
BUG=
Review URL: https://codereview.chromium.org/1699113002
Cr-Commit-Position: refs/heads/master@{#34039}
Drive-by-fix: Remove the (now) unused %_SetValueOf and %_JSValueGetValue
intrinsics from the various compilers and the runtime.
R=jarin@chromium.org
Review URL: https://codereview.chromium.org/1698343002
Cr-Commit-Position: refs/heads/master@{#34037}
This functionality is useful for stubs that need to walk the stack. The new
machine operator, LoadParentFramePointer dosn't force the currently compiling
method to have a frame in contrast to LoadFramePointer. Instead, it adapts
accordingly when frame elision is possible, making efficient stack walks
possible without incurring a performance penalty for small stubs that can
benefit from frame elision.
R=bmeurer@chromium.org
LOG=N
Review URL: https://codereview.chromium.org/1695313002
Cr-Commit-Position: refs/heads/master@{#34014}
There are only two uses of %_ObjectEquals left, which should actually
use strict equality instead, so there's no need to keep this special
logic at all.
R=mvstanton@chromium.org
Review URL: https://codereview.chromium.org/1692193002
Cr-Commit-Position: refs/heads/master@{#33948}
The tests in question have been disabled because throwing into lazy
deoptimized code was borked. After recent fixes landed these tests
should now pass again.
R=jarin@chromium.org
TEST=cctest/test-run-deopt/DeoptExceptionHandler
BUG=v8:4195
LOG=n
Review URL: https://codereview.chromium.org/1692873002
Cr-Commit-Position: refs/heads/master@{#33937}
The field in question is only needed when the optimizing compiler is
triggered via OSR. All other paths (e.g. from bytecode stream) should
not rely on the unoptimized code being present.
R=yangguo@chromium.org
Review URL: https://codereview.chromium.org/1685633002
Cr-Commit-Position: refs/heads/master@{#33860}
This makes sure we can run through the TurboFan pipeline without having
to parse the source when using the bytecode stream as input. This path
is now being tested by the BytecodeGraphTester helper.
R=titzer@chromium.org,rmcilroy@chromium.org
Review URL: https://codereview.chromium.org/1679313002
Cr-Commit-Position: refs/heads/master@{#33856}
By now only the default %TypedArray%.prototype.sort compare function
and the JS implementation of SameValueZero were still using the odd
%_IsMinusZero intrinsic, whose semantics both included a number check
(actually HeapNumber test) plus testing if the heap number stores the
special -0 value. In both cases we already know that we deal with
number so we can reduce it to a simple number test for -0, which can
be expressed via dividing 1 by that value and checking the sign of
the result. In case of the compare function, we can be even smarter
and work with the reciprocal values in case x and y are equal to 0
(although long term we should probably rewrite the fast case for
the typed array sorting function in C++ anyway, which will be way,
way faster than our handwritten callback-style, type-feedback
polluted JS implementation).
R=yangguo@chromium.org
Review URL: https://codereview.chromium.org/1680783002
Cr-Commit-Position: refs/heads/master@{#33833}
Adds implementation and tests to support const/let variables in the
interpreter.
BUG=v8:4280,v8:4679
LOG=N
Review URL: https://codereview.chromium.org/1634153002
Cr-Commit-Position: refs/heads/master@{#33819}
Reason for revert:
Must revert for now due to chromium api natives issues.
Original issue's description:
> Type Feedback Vector lives in the closure
>
> (RELAND: the problem before was a missing write barrier for adding the code
> entry to the new closure. It's been addressed with a new macro instruction
> and test. The only change to this CL is the addition of two calls to
> __ RecordWriteCodeEntryField() in the platform CompileLazy builtin.)
>
> 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.
>
> We rely more heavily on the Optimized Code Map in the SharedFunctionInfo. The
> vector actually lives in the first slot of the literals array (indeed there is
> great commonality between those arrays, they can be thought of as the same
> thing). So we make greater effort to ensure there is a valid literals array
> after compilation.
>
> This meant, for performance reasons, that we needed to extend
> FastNewClosureStub to support creating closures with literals. And ultimately,
> it drove us to move the optimized code map lookup out of FastNewClosureStub
> and into the compile lazy builtin.
>
> The heap change is trivial so I TBR Hannes for it...
> Also, Yang has had a look at the debugger changes already and approved 'em. So he is TBR style too.
> And Benedikt reviewed it as well.
>
> TBR=hpayer@chromium.org, yangguo@chromium.org, bmeurer@chromium.org
>
> BUG=
>
> Committed: https://crrev.com/bb31db3ad6de16f86a61f6c7bbfd3274e3d957b5
> Cr-Commit-Position: refs/heads/master@{#33741}
TBR=bmeurer@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=
Review URL: https://codereview.chromium.org/1670813005
Cr-Commit-Position: refs/heads/master@{#33766}
(RELAND: the problem before was a missing write barrier for adding the code
entry to the new closure. It's been addressed with a new macro instruction
and test. The only change to this CL is the addition of two calls to
__ RecordWriteCodeEntryField() in the platform CompileLazy builtin.)
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.
We rely more heavily on the Optimized Code Map in the SharedFunctionInfo. The
vector actually lives in the first slot of the literals array (indeed there is
great commonality between those arrays, they can be thought of as the same
thing). So we make greater effort to ensure there is a valid literals array
after compilation.
This meant, for performance reasons, that we needed to extend
FastNewClosureStub to support creating closures with literals. And ultimately,
it drove us to move the optimized code map lookup out of FastNewClosureStub
and into the compile lazy builtin.
The heap change is trivial so I TBR Hannes for it...
Also, Yang has had a look at the debugger changes already and approved 'em. So he is TBR style too.
And Benedikt reviewed it as well.
TBR=hpayer@chromium.org, yangguo@chromium.org, bmeurer@chromium.org
BUG=
Review URL: https://codereview.chromium.org/1668103002
Cr-Commit-Position: refs/heads/master@{#33741}
Adds implementation and tests for with statement to interprter.
BUG=v8:4280,v8:4684
LOG=N
Review URL: https://codereview.chromium.org/1656863002
Cr-Commit-Position: refs/heads/master@{#33705}
Moves the temporary register allocator out of the bytecode array
builder into TemporaryRegisterAllocator class and adds unittests.
Particular must be taken around the translation window boundary
motivating the addition of tests.
Also adds a Clear() method to IdentityMap() which is called by
the destructor. This allows classes to hold an IdentityMap if
they are zone allocated. Classes must call Clear() before the zone
is re-cycled or face v8 heap corruption.
BUG=v8:4280,v8:4675
LOG=N
Review URL: https://codereview.chromium.org/1651133002
Cr-Commit-Position: refs/heads/master@{#33686}
If the architecture does not provide rounding instructions, then C
implementations of these rounding instructions are called. The C
implementations from math.h are used, function pointers are registered
as external references so that they can be call from the simulator.
R=titzer@chromium.org
BUG=575379
LOG=Y
Review URL: https://codereview.chromium.org/1661463002
Cr-Commit-Position: refs/heads/master@{#33677}
After this change, the functionality of the CodeStubAssembler should be
sufficient to generate non-trivial stubs (e.g. the KeyedLoadIC) with control
flow, variables and probing of internal meta data structures.
Specifically this patch:
* introduces a Label class, which allows stubs to construct graphs that don't
have linear control graphs.
* introduces a Variable class. Variables can be bound to Node* values at
different points in a non-linear control flow graph. In conjunction with the
Label machinery, the CodeStubAssembler ensures that Phi nodes are inserted at
the "minimal" set of merge points.
* adds Tail calling support to other Stubs and to any arbitrary code whose
interface can be described by a CallInterfaceDescriptor.
* provides new macros for accessing FixedArray elements that are optimized for
use with Smi values.
Review URL: https://codereview.chromium.org/1649723002
Cr-Commit-Position: refs/heads/master@{#33664}
The runtime call to Runtime::kReThrow does not need a frame-state node
attached, the frame-state input count is zero. This restructures the
graph builder to not instantiate a FrameStateBeforeAndAfter for it.
R=jarin@chromium.org
TEST=cctest/test-run-bytecode-graph-builder
BUG=v8:4674
LOG=n
Review URL: https://codereview.chromium.org/1654833002
Cr-Commit-Position: refs/heads/master@{#33641}
Although x87 has 8 registers, it use only 1 double register in TurboFan code generation for some limitations.
So for TestStackSlot() function, use the num_allocatable_double_registers() to check the avaliable double registers
of TurboFan is more suitable than num_double_registers().
BUG=
Review URL: https://codereview.chromium.org/1653913002
Cr-Commit-Position: refs/heads/master@{#33636}
The reachability of a bytecode is implied by a live environment reaching
the bytecode during the abstract control flow simulation of the bytecode
iteration perfromed by the graph builder. There is no need to compute it
upfront anymore.
Also, the upfront computation was only an approximation when it came to
the reachability of an exception handler. This is why several tests for
translation of exception handlers can now be enabled.
R=oth@chromium.org
Review URL: https://codereview.chromium.org/1645293003
Cr-Commit-Position: refs/heads/master@{#33634}
The CL #33347 (https://codereview.chromium.org/1589363002) added the RunRoundInt32ToFloat32 test case and X87 failed at it.
The reason is same as the CL #31808 (issue 1430943002, X87: Change the test case for X87 float operations), please refer: https://codereview.chromium.org/1430943002/.
Here is the key comments from CL #31808
Some new test cases use CheckFloatEq(...) and CheckDoubleEq(...) function for result check. When GCC compiling the CheckFloatEq() and CheckDoubleEq() function,
those inlined functions has different behavior comparing with GCC ia32 build and x87 build.
The major difference is sse float register still has single precision rounding semantic. While X87 register has no such rounding precsion semantic when directly use register value.
The V8 turbofan JITTed has exactly same result in both X87 and IA32 port.
For CHECK_EQ(a, b) function, if a and b are doubles, it will has similar behaviors like CheckFloatEq(...) and CheckDoubleEq(...) function when compiled by GCC and causes the test case
fail.
So we add the following sentence to do type case to keep the same precision for RunRoundInt32ToFloat32. Such as: volatile double expect = static_cast<float>(*i).
BUG=
Review URL: https://codereview.chromium.org/1649323002
Cr-Commit-Position: refs/heads/master@{#33630}
Reason for revert:
problems on Mac64
Original issue's description:
> [turbofan] Add the StackSlot operator to turbofan.
>
> The StackSlot operator allows to allocate a spill slot on the stack. We
> are going to use this operator to pass floats through pointers to c
> functions, which we need for floating point rounding in the case where
> the architecture does not provide rounding instructions.
>
> R=titzer@chromium.org, v8-arm-ports@googlegroups.com, v8-ppc-ports@googlegroups.com, v8-mips-ports@googlegroups.com
>
> Committed: https://crrev.com/7a693437787090d62d937b862e29521debcc5223
> Cr-Commit-Position: refs/heads/master@{#33600}
TBR=titzer@chromium.org,v8-arm-ports@googlegroups.com,v8-mips-ports@googlegroups.com,v8-ppc-ports@googlegroups.com
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
Review URL: https://codereview.chromium.org/1644283002
Cr-Commit-Position: refs/heads/master@{#33601}
This is to fix a bug in the bytecode graph builder. This cl adds a new merge
node before we copy the environment on conditional/unconditional jumps. Since
these environments could be merged later, we add a place holder merge so that
the control dependencies are correctly merged. If we do not have a merge node
we may incorrectly merge the dependencies into the previous block.
For ex: test-run-variables/ContextStoreVariables in cctests.
BUG=v8:4280
LOG=N
Review URL: https://codereview.chromium.org/1641143002
Cr-Commit-Position: refs/heads/master@{#33591}
avoid jump threading erasing the reconstruction of a frame, if the
frame was elided.
BUG=
Review URL: https://codereview.chromium.org/1642823002
Cr-Commit-Position: refs/heads/master@{#33590}
This translates the exception handler table attached to a bytecode array
correctly into exceptional projections within the TurboFan graph. We
perform an abstract simulation of handlers that are being entered and
exited by the bytecode iteration to track the correct handler for each
node.
R=oth@chromium.org
BUG=v8:4674
LOG=n
Review URL: https://codereview.chromium.org/1641723002
Cr-Commit-Position: refs/heads/master@{#33580}
Reason for revert:
Bug: failing to use write barrier when writing code entry into closure.
Original issue's description:
> Reland of Type Feedback Vector lives in the closure
>
> (Fixed a bug found by nosnap builds.)
>
> 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.
>
> We rely more heavily on the Optimized Code Map in the SharedFunctionInfo. The
> vector actually lives in the first slot of the literals array (indeed there is
> great commonality between those arrays, they can be thought of as the same
> thing). So we make greater effort to ensure there is a valid literals array
> after compilation.
>
> This meant, for performance reasons, that we needed to extend
> FastNewClosureStub to support creating closures with literals. And ultimately,
> it drove us to move the optimized code map lookup out of FastNewClosureStub
> and into the compile lazy builtin.
>
> The heap change is trivial so I TBR Hannes for it...
>
> TBR=hpayer@chromium.org
> BUG=
>
> Committed: https://crrev.com/d984b3b0ce91e55800f5323b4bb32a06f8a5aab1
> Cr-Commit-Position: refs/heads/master@{#33548}
TBR=bmeurer@chromium.org,yangguo@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=
Review URL: https://codereview.chromium.org/1643533003
Cr-Commit-Position: refs/heads/master@{#33556}
(Fixed a bug found by nosnap builds.)
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.
We rely more heavily on the Optimized Code Map in the SharedFunctionInfo. The
vector actually lives in the first slot of the literals array (indeed there is
great commonality between those arrays, they can be thought of as the same
thing). So we make greater effort to ensure there is a valid literals array
after compilation.
This meant, for performance reasons, that we needed to extend
FastNewClosureStub to support creating closures with literals. And ultimately,
it drove us to move the optimized code map lookup out of FastNewClosureStub
and into the compile lazy builtin.
The heap change is trivial so I TBR Hannes for it...
TBR=hpayer@chromium.org
BUG=
Review URL: https://codereview.chromium.org/1642613002
Cr-Commit-Position: refs/heads/master@{#33548}
Reason for revert:
FAilure on win32 bot, need to investigate webkit failures.
Original issue's description:
> Type Feedback Vector lives in the closure
>
> 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.
>
> We rely more heavily on the Optimized Code Map in the SharedFunctionInfo. The
> vector actually lives in the first slot of the literals array (indeed there is
> great commonality between those arrays, they can be thought of as the same
> thing). So we make greater effort to ensure there is a valid literals array
> after compilation.
>
> This meant, for performance reasons, that we needed to extend
> FastNewClosureStub to support creating closures with literals. And ultimately,
> it drove us to move the optimized code map lookup out of FastNewClosureStub
> and into the compile lazy builtin.
>
> The heap change is trivial so I TBR Hannes for it...
>
> TBR=hpayer@chromium.org
>
> BUG=
>
> Committed: https://crrev.com/a5200f7ed4d11c6b882fa667da7a1864226544b4
> Cr-Commit-Position: refs/heads/master@{#33518}
TBR=bmeurer@chromium.org,akos.palfi@imgtec.com
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=
Review URL: https://codereview.chromium.org/1632993003
Cr-Commit-Position: refs/heads/master@{#33520}
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.
We rely more heavily on the Optimized Code Map in the SharedFunctionInfo. The
vector actually lives in the first slot of the literals array (indeed there is
great commonality between those arrays, they can be thought of as the same
thing). So we make greater effort to ensure there is a valid literals array
after compilation.
This meant, for performance reasons, that we needed to extend
FastNewClosureStub to support creating closures with literals. And ultimately,
it drove us to move the optimized code map lookup out of FastNewClosureStub
and into the compile lazy builtin.
The heap change is trivial so I TBR Hannes for it...
TBR=hpayer@chromium.org
BUG=
Review URL: https://codereview.chromium.org/1563213002
Cr-Commit-Position: refs/heads/master@{#33518}
The current support for try-catch in the interpreter can handle most of
the cases appearing in our test suite. Also the flag in question did not
detect try-finally constructs. This removes the flag and instead extends
the test expectations.
R=rmcilroy@chromium.org
BUG=v8:4674
LOG=n
Review URL: https://codereview.chromium.org/1631593003
Cr-Commit-Position: refs/heads/master@{#33494}
The motivation for this is that CompilationInfo really shouldn't
explicitly know anything about CodeStubs. This is evident in
the TurboFan stubs pipeline, which only needs to pass down
information about Code::Flags to the code generator and not
any of the CallInterfaceDescriptor silliness that Hydrogen has
to push around, since TF has the Linkage class that
encapsulates everything that is needed for the stub ABI. So,
instead of threading CodeStub machinery through the TF stub
pipeline, it is now removed from CompilationInfo and replaced
by only the explicit bits needed both by the Crankshaft and
TF pipelines in code generation.
Review URL: https://codereview.chromium.org/1604543002
Cr-Commit-Position: refs/heads/master@{#33410}
Now that we support eval in Ignition, remove the fallback for eval checks
and make the flag only fallback on catch blocks.
BUG=v8:4280,v8:4676
LOG=N
Review URL: https://codereview.chromium.org/1595223004
Cr-Commit-Position: refs/heads/master@{#33384}
Reason for revert:
Code is incorrect for -0.
Original issue's description:
> [turbofan] Implement rounding of floats on x64 and ia32 without sse4.1.
>
> The implementation sets the rounding mode flag and then uses the
> cvtsd2si and cvtsi2sd instructions (convert between float and int) to do
> the rounding. Input values outside int range either don't have to be
> rounded anyways, or are rounded by calculating input + 2^52 - 2^52 for
> positive inputs, or input -2^52 + 2^52 for negative inputs. The original
> rounding mode is restored afterwards.
>
> R=titzer@chromium.org
>
> B=575379
>
> Committed: https://crrev.com/fa5d09e547abe79a8c82f780deb980c53ad78beb
> Cr-Commit-Position: refs/heads/master@{#33367}
TBR=titzer@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/1593313010
Cr-Commit-Position: refs/heads/master@{#33369}
