Import base::ieee754::tan() from fdlibm and introduce Float64Tan TurboFan
operator based on that, similar to what we do for Float64Cos and Float64Sin.
Rewrite Math.tan() as TurboFan builtin and use those operators to also
inline Math.tan() into optimized TurboFan functions.
Drive-by-fix: Kill the %_ConstructDouble intrinsics, and provide only
the %ConstructDouble runtime entry for writing tests.
BUG=v8:5086,v8:5126
R=yangguo@chromium.org
Review-Url: https://codereview.chromium.org/2083453002
Cr-Commit-Position: refs/heads/master@{#37087}
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}
Import base::ieee754::cos() and base::ieee754::sin() from fdlibm and
introduce Float64Cos and Float64Sin TurboFan operator based on that,
similar to what we do for Float64Log. Rewrite Math.cos() and Math.sin()
as TurboFan builtins and use those operators to also inline Math.cos()
and Math.sin() into optimized TurboFan functions.
CQ_INCLUDE_TRYBOTS=tryserver.chromium.linux:linux_chromium_rel_ng;tryserver.blink:linux_blink_rel
R=mvstanton@chromium.org
BUG=v8:5086,v8:5118
Review-Url: https://codereview.chromium.org/2073123002
Cr-Commit-Position: refs/heads/master@{#37072}
Implement WASM support on big-endian platforms. WASM has
an implicit requirement that it is running on little-endian
machine. We achieve WASM support on BE by keeping data
in memory in little-endian order, and changing data
endianness before storing to memory and after loading from
memory.
BUG=
Review-Url: https://codereview.chromium.org/2034093002
Cr-Commit-Position: refs/heads/master@{#37065}
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}
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:
Fragmentation of LABs could result in increasing memory usage (pages) instead of shrinking.
BUG=chromium:620320
LOG=N
Original issue's description:
> [heap] Add page evacuation mode for new->new
>
> Adds an evacuation mode that allows moving pages within new space without
> copying objects.
>
> Basic idea:
> a) Move page within new space
> b) Sweep page to make iterable and process ArrayBuffers
> c) Finish sweep till next scavenge
>
> Threshold is currently 70% live bytes, i.e., the same threshold we use
> to determine fragmented pages.
>
> BUG=chromium:581412
> LOG=N
> CQ_EXTRA_TRYBOTS=tryserver.v8:v8_linux_arm64_gc_stress_dbg,v8_linux_gc_stress_dbg,v8_mac_gc_stress_dbg,v8_linux64_tsan_rel,v8_mac64_asan_rel
>
> Committed: https://crrev.com/49b23201671b25092a3c22eb85783f39b95a5f87
> Cr-Commit-Position: refs/heads/master@{#36990}
TBR=ulan@chromium.org
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG=chromium:581412
Review-Url: https://codereview.chromium.org/2063013005
Cr-Commit-Position: refs/heads/master@{#37042}
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}
We report the byte offset as column number, but devtools assumes them
to be 1-based and subtracts one unconditionally before further
processing it. It's a bit unfortunate, but because of that we have to
just add 1 to the reported column number on the public StackTrace API.
R=ahaas@chromium.org, titzer@chromium.org
BUG=chromium:613110
Review-Url: https://codereview.chromium.org/2071563002
Cr-Commit-Position: refs/heads/master@{#37036}
Those were wrongly translated from gyp with ia32. This should
land before renaming v8_target_arch to v8_target_cpu.
BUG=chromium:620527
NOTRY=true
TBR=vogelheim@chromium.org
Review-Url: https://codereview.chromium.org/2065323004
Cr-Commit-Position: refs/heads/master@{#37027}
The patch introduces a dedicated dispatching class for JIT code events. It is
set as a helper on the isolate.
This allows classes across v8 to break their dependency on Logger and CpuProfiler.
These two became just regular clients of the dispatcher.
BUG=v8:4789
Review-Url: https://codereview.chromium.org/2061623002
Cr-Commit-Position: refs/heads/master@{#37005}
Adds an evacuation mode that allows moving pages within new space without
copying objects.
Basic idea:
a) Move page within new space
b) Sweep page to make iterable and process ArrayBuffers
c) Finish sweep till next scavenge
Threshold is currently 70% live bytes, i.e., the same threshold we use
to determine fragmented pages.
BUG=chromium:581412
LOG=N
CQ_EXTRA_TRYBOTS=tryserver.v8:v8_linux_arm64_gc_stress_dbg,v8_linux_gc_stress_dbg,v8_mac_gc_stress_dbg,v8_linux64_tsan_rel,v8_mac64_asan_rel
Review-Url: https://codereview.chromium.org/1957323003
Cr-Commit-Position: refs/heads/master@{#36990}
Named capture groups may be specified using the /(?<name>pattern)/u
syntax, with named backreferences specified as /\k<name>/u. They're
hidden behind the --harmony-regexp-named-captures flag, and are only
enabled for unicode regexps.
R=yangguo@chromium.org
BUG=
Review-Url: https://codereview.chromium.org/2050343002
Cr-Commit-Position: refs/heads/master@{#36986}
The last 4 test cases in test/cctest/wasm/test-run-wasm-asmjs.cc added by the CL 36911 (https://codereview.chromium.org/2061583002) use float_t and double_t type for WasmRunner.
For examples: At line 249: WasmRunner<float_t> r(&module, MachineType::Uint32());
But float_t and double_t depends on FLT_EVAL_METHOD macro of compiler. FLT_EVAL_METHOD is variant on different platform, if the FLT_EVAL_METHOD is 2, both float_t and double_t will be long
double and gcc or clang will met error when compiling WasmRunner<long double> r(&module,MachineType::Uint32());
For more details, please refer:
float_t: http://www.cplusplus.com/reference/cmath/float_t/
FLT_EVAL_METHOD: https://en.wikipedia.org/wiki/C99 check the IEEE 754 floating point support section directly.
This CL used float and double to replace float_t and double_t to avoid this issue.
BUG=
Review-Url: https://codereview.chromium.org/2066703003
Cr-Commit-Position: refs/heads/master@{#36982}
Reporting use counts by invoking a callback once per occurrence has
a large overhead cost in certain situations, for example when it needs
to be dispatched to a different thread (which is the case for Web Workers).
Parsing large scripts can produce a lot of occurrences (strict/sloppy mode
once per function).
Chromium (the only known user of UseCounters so far) does not actually care
about number of occurrences, but simply whether they happened at least once.
This commit changes behavior to report features at most once, which dramatically
improves performance for impacted use cases, and should not affect the only
known real world usage.
R=littledan@chromium.org
BUG=chromium:614775
Review-Url: https://codereview.chromium.org/2062203002
Cr-Commit-Position: refs/heads/master@{#36979}
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}
The former will handle loads of predeclared global variables (vars and
functions), lets, consts and undeclared variables. The latter will handle
named loads from explicit receiver. In addition, named loads does not
depend of the TypeofMode.
TypeofMode related cleanup will be done in the follow-up CL.
BUG=chromium:576312
LOG=Y
TBR=bmeurer@chromium.org
Review-Url: https://codereview.chromium.org/1912633002
Cr-Commit-Position: refs/heads/master@{#36965}
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
Review-Url: https://codereview.chromium.org/2060273003
Cr-Commit-Position: refs/heads/master@{#36963}
Reason for revert:
Cannot reproduce gc-stress failures locally.
Original issue's description:
> Revert of Replace all remaining Oddball checks with new function (patchset #10 id:180001 of https://codereview.chromium.org/2043183003/ )
>
> Reason for revert:
> failing tests
>
> Original issue's description:
> > Replace all remaining Oddball checks with new function
> >
> > This CL removes the IsUndefined() and Co. methods from Object and HeapObject.
> > The new method all take the isolate as parameter.
> >
> > BUG=
> >
> > Committed: https://crrev.com/ccefb3ae5fe967288d568013fb04e8761eafebc5
> > Cr-Commit-Position: refs/heads/master@{#36921}
>
> TBR=mstarzinger@chromium.org,verwaest@chromium.org,yangguo@chromium.org,ahaas@chromium.org
> # Skipping CQ checks because original CL landed less than 1 days ago.
> NOPRESUBMIT=true
> NOTREECHECKS=true
> NOTRY=true
> BUG=
>
> Committed: https://crrev.com/33b8bc24a12fb062100c0be84456faeb0b9fa5d1
> Cr-Commit-Position: refs/heads/master@{#36923}
TBR=mstarzinger@chromium.org,verwaest@chromium.org,yangguo@chromium.org,ahaas@chromium.org
BUG=
Review-Url: https://codereview.chromium.org/2059173002
Cr-Commit-Position: refs/heads/master@{#36957}
This moves common configs used by all v8 targets into
common templates.
This also fixes using v8_optimized_debug correctly in
executables and components.
BUG=chromium:474921
NOTRY=true
Review-Url: https://codereview.chromium.org/2054803003
Cr-Commit-Position: refs/heads/master@{#36956}
Reason for revert:
failing tests
Original issue's description:
> Replace all remaining Oddball checks with new function
>
> This CL removes the IsUndefined() and Co. methods from Object and HeapObject.
> The new method all take the isolate as parameter.
>
> BUG=
>
> Committed: https://crrev.com/ccefb3ae5fe967288d568013fb04e8761eafebc5
> Cr-Commit-Position: refs/heads/master@{#36921}
TBR=mstarzinger@chromium.org,verwaest@chromium.org,yangguo@chromium.org,ahaas@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/2060213002
Cr-Commit-Position: refs/heads/master@{#36923}
This CL removes the IsUndefined() and Co. methods from Object and HeapObject.
The new method all take the isolate as parameter.
BUG=
Review-Url: https://codereview.chromium.org/2043183003
Cr-Commit-Position: refs/heads/master@{#36921}
Import base::ieee754::atan() and base::ieee754::atan2() from fdlibm and
introduce Float64Atan and Float64Atan2 TurboFan operators based on those,
similar to what we already did for Float64Log and Float64Log1p. Rewrite
Math.atan() and Math.atan2() as TurboFan builtin and use the operators
to also inline Math.atan() and Math.atan2() into optimized TurboFan functions.
R=yangguo@chromium.org
BUG=v8:5086,v8:5095
Review-Url: https://codereview.chromium.org/2065503002
Cr-Commit-Position: refs/heads/master@{#36916}
Import base::ieee754::log1p() from fdlibm and introduce a Float64Log1p
TurboFan operator based on that, similar to what we do for Float64Log.
Rewrite Math.log1p() as TurboFan builtin and use that operator to also
inline Math.log1p() into optimized TurboFan functions.
Also unify the handling of the special IEEE 754 functions somewhat in
the TurboFan backends. At some point we can hopefully express this
completely in the InstructionSelector (once we have an idea what to do
with the ST(0) return issue on IA-32/X87).
Drive-by-fix: Add some more test coverage for the log function.
R=yangguo@chromium.org
BUG=v8:5086,v8:5092
Review-Url: https://codereview.chromium.org/2060743002
Cr-Commit-Position: refs/heads/master@{#36914}
MemoryOperands, on IA32. This needed to be fixed so that we can
compile wasm code before creating instances, since the compiled code
needs to be patched up for memory and globals references.
This surfaces in asm-to-wasm scenarios.
Added testing (rather, enhanced existing tests).
Note patch#1 where we fail on ia32, and patch#2 with the fix.
BUG=v8:5072
Review-Url: https://codereview.chromium.org/2061583002
Cr-Commit-Position: refs/heads/master@{#36911}
It is expected that temporarily used strings die while they are
in new heap. So we can avoid to pay a heavy cost to externalize
them. If they are used for times, externalization will happen
when they move to an old heap.
BUG=chrmoium:606093
Review-Url: https://codereview.chromium.org/2046933002
Cr-Commit-Position: refs/heads/master@{#36907}
In commit b3bfc0bd58, I corrected the source
position of yield-exceptions by not setting the "return position" on returns
that correspond to yields. It turns out that this caused a bug with debug
stepping. The proper fix is to keep the return position on those returns but
additionally attach the yield's source position to the Throw emitted in
VisitYield.
R=rmcilroy@chromium.org, yangguo@chromium.org
BUG=v8:4907
Review-Url: https://codereview.chromium.org/2051783002
Cr-Commit-Position: refs/heads/master@{#36896}
after the first GC if time allows and there is memory to be freed.
BUG=chromium:618958
LOG=NO
Review-Url: https://codereview.chromium.org/2057103002
Cr-Commit-Position: refs/heads/master@{#36894}
This should solve the problem with missing checkpoints after JSToNumber
(PlainPrimitiveToNumber is marked no-write, so the frame-state
propagation should see through it.)
Unfortunately, this also duplicates the word32- and float64-truncation
magic that we have for JSToNumber in "simplified lowering".
Review-Url: https://codereview.chromium.org/2059653002
Cr-Commit-Position: refs/heads/master@{#36881}
This switches Math.log to use an fdlibm based version of log, imported
as base::ieee754::log, and use that consistently everywhere, i.e. change
the Float64Log TurboFan operators on Intel to use the C++ implementation
as well (same for Crankshaft).
R=yangguo@chromium.org
BUG=v8:5065,v8:5086
Review-Url: https://codereview.chromium.org/2053893003
Cr-Commit-Position: refs/heads/master@{#36880}
We ported hashmap.h into libsampler as a workaround before, so the main focus of
this patch is to reduce code duplication. This patch moves the hashmap into
src/base as well as creates DefaultAllocationPolicy using malloc and free.
BUG=v8:5050
LOG=n
Review-Url: https://codereview.chromium.org/2010243003
Cr-Commit-Position: refs/heads/master@{#36873}
There are no ICs left that store their state in this field: vector based
ICs use feedback vector and the rest three (BinaryOpIC, CompareIC and
ToBooleanIC) reconstruct their state from the ExtraICState field.
This CL also removes unused InlineCacheState::DEBUG_STUB which was used
mostly in Code::is_debug_stub(). The latter now checks if the code is one
of the debug builtins instead.
BUG=chromium:618701
LOG=Y
Review-Url: https://codereview.chromium.org/2052763003
Cr-Commit-Position: refs/heads/master@{#36871}
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}
With this change the bytecode array builder only emits expression
positions for bytecodes that can throw. This allows more peephole
optimization opportunities and results in smaller code.
BUG=v8:4280,chromium:615979
LOG=N
Review-Url: https://codereview.chromium.org/2038323002
Cr-Commit-Position: refs/heads/master@{#36863}
The optimization stages in the bytecode generation pipeline must
preserve source position information. Failure to preserve
source position information could result in single stepping
in the debugger misbehaving or mis-reporting in exception stack traces.
This change adds tests intended to check optimizations do not damage
source position info.
BUG=v8:4280
LOG=N
Review-Url: https://codereview.chromium.org/2042633002
Cr-Commit-Position: refs/heads/master@{#36855}
Now they use a proper way of checking if the snapshot is available or not.
Review-Url: https://codereview.chromium.org/2054693002
Cr-Commit-Position: refs/heads/master@{#36844}
This allows using icu data, bundled in the icudtl.dat file,
to be loaded automatically from a default location
side-by-side with the executable.
The v8 stand-alone default is still to use statically
linked ICU data, but this will be switched in a separate
follow-up CL.
BUG=chromium:616033
LOG=y
Review-Url: https://codereview.chromium.org/2042253002
Cr-Commit-Position: refs/heads/master@{#36823}
This reverts commit d3a43e47dd.
This patch also adds typed_array_fun and typed_array_protoype to the
native context. These are used in InstallTypedArray to set up the
prototype chain correctly for each typed array sub class. This removes
the need to later monkey patch them prototype chain in typedarray.js.
This mechanism is also used to get hold of the TypedArray in
typedarray.js, removing the need for a global TypedArray.
This patch updates CallRuntime.golden to account for the two extra
native runtime calls. This patch also fixes some formatting issues (by
running git cl format).
BUG=chromium:579905, chromium:593634, v8:4085, v8:5073
Review-Url: https://codereview.chromium.org/2046333002
Cr-Commit-Position: refs/heads/master@{#36811}
Reason for revert:
Needs fixing of slot set.
Original issue's description:
> [heap] Uncommit unused large object page memory.
>
> As a first step I uncommit the memory on the main thread. Also to measure impact and stability of that optimization. In a follow-up CL, the uncommitting should be moved on the concurrent thread.
>
> BUG=
>
> Committed: https://crrev.com/d61a5c376ba51145dc4684e39d5d3a9ce75bcfa6
> Cr-Commit-Position: refs/heads/master@{#36763}
TBR=ulan@chromium.org
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG=
Review-Url: https://codereview.chromium.org/2043263002
Cr-Commit-Position: refs/heads/master@{#36807}
backing store.
Details of tracking:
- Scavenge: New space pages are processes in bulk on the main thread
- MC: Unswept pages are processed in bulk in parallel. All other pages
are processed by the sweeper concurrently.
BUG=chromium:611688
LOG=N
TEST=cctest/test-array-buffer-tracker/*
CQ_EXTRA_TRYBOTS=tryserver.v8:v8_linux_arm64_gc_stress_dbg,v8_linux_gc_stress_dbg,v8_mac_gc_stress_dbg,v8_linux64_tsan_rel,v8_mac64_asan_rel
Review-Url: https://codereview.chromium.org/2036643002
Cr-Commit-Position: refs/heads/master@{#36798}
PrimaryStubCache and SecondaryStubCache: resurrected outdated tests (and enabled stub cache counters in the new LoadIC).
TryProbeStubCache: decreased number of code objects created.
Review-Url: https://codereview.chromium.org/2040193002
Cr-Commit-Position: refs/heads/master@{#36794}
In most cases we return a Smi and undefined for the other cases. Hence there
is no need to handlify the result unecessary. Additionally pass in the isolate
for the hash-symbol lookup.
BUG=
Review-Url: https://codereview.chromium.org/2044843002
Cr-Commit-Position: refs/heads/master@{#36790}
As a first step I uncommit the memory on the main thread. Also to measure impact and stability of that optimization. In a follow-up CL, the uncommitting should be moved on the concurrent thread.
BUG=
Review-Url: https://codereview.chromium.org/2032393002
Cr-Commit-Position: refs/heads/master@{#36763}
The stubs do not increase respective counters as they are in the snapshot and --native-code-counters is off during snapshot creation anyway.
Review-Url: https://codereview.chromium.org/2031753003
Cr-Commit-Position: refs/heads/master@{#36754}
Since the generic GetCallingContext is deprecated, but there's still the
use case for the debugger to get the currently debugged context while in
the debug context, add a convenience API for it.
Note that EventDetails already exposes this context, but the embedder
might not necessarily have the EventDetails around.
R=verwaest@chromium.org
BUG=
Review-Url: https://codereview.chromium.org/2040853003
Cr-Commit-Position: refs/heads/master@{#36751}
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 is mostly about DCHECKs. Enabling some requires a few
changes to tests that were not careful about types.
BUG=
Review-Url: https://codereview.chromium.org/2033703002
Cr-Commit-Position: refs/heads/master@{#36734}
This change requires a single pass over the register set during
bytecode pipeline flushes.
A few bytecode tests are updated too because the order of register
flushes is different.
BUG=v8:4280
LOG=N
Review-Url: https://codereview.chromium.org/2033013002
Cr-Commit-Position: refs/heads/master@{#36726}
This moves processing of jumps out of bytecode array builder and into
bytecode array writer. This simplifies the pipeline by avoiding having
to flush for offset and patch up offsets in bytecode array builder based
on what was emitted by the bytecode array writer.
This also enables future refactorings to add dead code elimination back
into the pipeline, and move processing of scalable operand sizes to the
end of the pipeline (in the bytecode array writer) rather than having to
deal with scalable operand types throughout pipeline.
BUG=v8:4280,chromium:616064
Review-Url: https://codereview.chromium.org/2035813002
Cr-Commit-Position: refs/heads/master@{#36716}
Add intrinsics for IsSmi, IsTypedArray, IsRegExp and IsJSProxy,
all of which are intrinsics in Full-Codegen.
BUG=v8:4280
LOG=N
Review-Url: https://codereview.chromium.org/2034493002
Cr-Commit-Position: refs/heads/master@{#36707}
Introduce a dedicated Float64Log machine operator, that is either
implemented by a direct C call or by platform specific code, i.e.
using the FPU on x64 and ia32.
This operator is used to implement Math.log as a proper TurboFan
builtin on top of the CodeStubAssembler.
Also introduce a NumberLog simplified operator on top of Float64Log
and use that for the fast inline path of Math.log inside TurboFan
optimized code.
BUG=v8:5065
Review-Url: https://codereview.chromium.org/2029413005
Cr-Commit-Position: refs/heads/master@{#36703}
VC++ complains about truncation of integer constants despite use of
static_cast. This isn't very helpful as it gives no way of suppressing
the warning in code, so this change suppresses it on the command line.
Additionally, the linker complains about importing of locally defined
functions in component builds. Until this is fixed the warnings should
be suppressed.
NOTRY=true
Review-Url: https://codereview.chromium.org/2028353004
Cr-Commit-Position: refs/heads/master@{#36695}
Previously, CodeAssembler Variables declared in an explicit C++ scope would
continue to be merged into future labels beyond that scope, causing
asserts. This CL ensures that Variables are properly ignored when they go out of
scope.
Review-Url: https://codereview.chromium.org/2035683002
Cr-Commit-Position: refs/heads/master@{#36690}
Previously, turbofan selected the gap use from first predecessor block when
hinting a phi, unless that block was deferred, in which case the gap move from
the first non-deferred predecessor block was chosen.
This strategy didn't guarantee that an important invariant was maintained: the
predecessor blocks chosen for hinting phis must preceed the phi's block in the
rpo ordering. In most cases the strategy worked, since graphs generated by the
AstGraphBuilder and existing stubs just happened to always generate schedules
where this rpo ordering property for the first predecessor block, but it is
quite possible to generate a code stub by hand that doesn't have this property
(see included test case).
After this CL, the allocator chooses either the the first non-deferred
"rpo-preceeding" block to be the hinting block, or the first deferred
"rpo-preceeding" block if that doesn't exist. In all previously-existing code,
this behavior is the same as the original algorithm, but has the benefit of not
failing in the register allocator in hand-crafted stubs where all the
"rpo-preceeding" predecessors are all in deferred code.
Review-Url: https://codereview.chromium.org/2030463003
Cr-Commit-Position: refs/heads/master@{#36689}
... since CodeStubAssembler does not belong to v8::internal::compiler namespace anymore.
Review-Url: https://codereview.chromium.org/2035533003
Cr-Commit-Position: refs/heads/master@{#36683}
Most maps have a small code cache (often only one entry), so this patch
optimizes memory consumption of such cases by using plain FixedArrays,
only switching to CodeCacheHashTables when the number of cached entries
gets so large that linear-scan lookups get too slow.
On loading inbox.google.com, this gets the aggregate size of all maps'
code caches (there are about 13,600 of them) from 4300 KB to 970 KB.
Review-Url: https://codereview.chromium.org/2021373002
Cr-Commit-Position: refs/heads/master@{#36681}
This introduces optimized number operations based on type feedback.
Summary of changes:
1. Typed lowering produces SpeculativeNumberAdd/Subtract for JSAdd/Subtract if
there is suitable feedback. The speculative nodes are connected to both the
effect chain and the control chain and they retain the eager frame state.
2. Simplified lowering now executes in three phases:
a. Propagation phase computes truncations by traversing the graph from uses to
definitions until checkpoint is reached. It also records type-check decisions
for later typing phase, and computes representation.
b. The typing phase computes more precise types base on the speculative types (and recomputes
representation for affected nodes).
c. The lowering phase performs lowering and inserts representation changes and/or checks.
3. Effect-control linearization lowers the checks to machine graphs.
Notes:
- SimplifiedLowering will be refactored to have handling of each operation one place and
with clearer input/output protocol for each sub-phase. I would prefer to do this once
we have more operations implemented, and the pattern is clearer.
- The check operations (Checked<A>To<B>) should have some flags that would affect
the kind of truncations that they can handle. E.g., if we know that a node produces
a number, we can omit the oddball check in the CheckedTaggedToFloat64 lowering.
- In future, we want the typer to reuse the logic from OperationTyper.
BUG=v8:4583
LOG=n
Review-Url: https://codereview.chromium.org/1921563002
Cr-Commit-Position: refs/heads/master@{#36674}
Reason for revert:
Also failing with the new implementation:
https://build.chromium.org/p/chromium.gpu/builders/Linux%20Debug%20%28NVIDIA%29/builds/62646
Will do a local repro now.
Original issue's description:
> Track based on JSArrayBuffer addresses on pages instead of the attached
> backing store.
>
> Details of tracking:
> - Scavenge: New space pages are processes in bulk on the main thread
> - MC: Unswept pages are processed in bulk in parallel. All other pages
> are processed by the sweeper concurrently.
>
> BUG=chromium:611688
> LOG=N
> TEST=cctest/test-array-buffer-tracker/*
> CQ_EXTRA_TRYBOTS=tryserver.v8:v8_linux_arm64_gc_stress_dbg,v8_linux_gc_stress_dbg,v8_mac_gc_stress_dbg,v8_linux64_tsan_rel,v8_mac64_asan_rel
>
> Committed: https://crrev.com/279e274eccf95fbb4bd41d908b9153acf6ec118a
> Cr-Commit-Position: refs/heads/master@{#36653}
TBR=hpayer@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=chromium:611688
Review-Url: https://codereview.chromium.org/2032973002
Cr-Commit-Position: refs/heads/master@{#36663}
Eliminating dead code in the bytecode array builder doesn't play nice
with the register elimination optimizer. We should move it to it's own
stage in the optimization pipeline, however doing so would require
refactoring of how we deal with jumps, so for now just remove the dead
code elimination optimization.
BUG=chromium:616064
Review-Url: https://codereview.chromium.org/2030583002
Cr-Commit-Position: refs/heads/master@{#36660}
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}
backing store.
Details of tracking:
- Scavenge: New space pages are processes in bulk on the main thread
- MC: Unswept pages are processed in bulk in parallel. All other pages
are processed by the sweeper concurrently.
BUG=chromium:611688
LOG=N
TEST=cctest/test-array-buffer-tracker/*
CQ_EXTRA_TRYBOTS=tryserver.v8:v8_linux_arm64_gc_stress_dbg,v8_linux_gc_stress_dbg,v8_mac_gc_stress_dbg,v8_linux64_tsan_rel,v8_mac64_asan_rel
Review-Url: https://codereview.chromium.org/2026633003
Cr-Commit-Position: refs/heads/master@{#36653}
This CL also updates the elements kind transition lookup logic:
1) First we go back to the root map,
2) Follow elements kind transitions,
3) Replay the property transitions.
BUG=v8:5009
LOG=Y
TBR=bmeurer@chromium.org
Review-Url: https://codereview.chromium.org/2015513002
Cr-Commit-Position: refs/heads/master@{#36652}
It happens that a scavenger runs during incremental marking. Currently scavenger does not care about MarkCompact's mark bits. When an object is alive and marked, and at least one scavenge happens during incremental marking, the object will be copied once to the other semispace in the new_space, and then once to the old_space. For surviving objects this is useless extra work.
In our current attempts (https://codereview.chromium.org/1988623002) to ensure marked objects are scavenged, all marked objects will survive therefore there will be many objects which will be uselessly copied.
This cl modifies our promotion logic so when incremental marking is in progress, and the object is marked, we promote it unconditionally.
BUG=
LOG=no
Review-Url: https://codereview.chromium.org/2005173003
Cr-Commit-Position: refs/heads/master@{#36643}
Async functions are built out of generators, but the
SharedFunctionInfo returns false for is_generator. is_resumable is
the broader query. This patch fixes many parts of V8 to refer
to is_resumable as appropriate.
One incidental change is to remove a check for generators extending
classes. This is part of a general check for constructors being the
only thing which can extend classes, so it is removed here and the
error message for the general case is made more accurate.
BUG=v8:4483
Review-Url: https://codereview.chromium.org/1996943002
Cr-Commit-Position: refs/heads/master@{#36621}
