Adds compile operations to the CompilerDispatcherJob interface. As such,
introduces Compiler::PrepareUnoptimizedCompilationJob and updates the
unoptimized compilation path to use CompilationJobs. Also unifies
FinalizeCompilationJob to deal with both optimized and unoptimized
compilation jobs.
A dummy FullCodegenCompilationJob is also introduced, where all the work
is done in the ExecuteJob phase, which cannot be run on a
background thread.
BUG=v8:5203
Review-Url: https://codereview.chromium.org/2251713002
Cr-Commit-Position: refs/heads/master@{#38897}
Reason for revert:
Octane/Mandreel aborts with an exception now:
TypeError: __FUNCTION_TABLE__[(r2 >> 2)] is not a function
Original issue's description:
> [turbofan] Insert dummy values when changing from None type.
>
> Currently we choose the MachineRepresentation::kNone representation for
> values of Type::None, and when converting values from the kNone representation
> we use "impossible" conversions that will crash at runtime. This
> assumes that the impossible conversions should never be hit (the only
> way to produce the impossible values is to perform an always-failing
> runtime check on a value, such as Smi-checking a string). Note that
> this assumes that the runtime check is executed before the impossible
> convesrion.
>
> Introducing BitwiseOr type feedback broke this in two ways:
>
> - we always pick Word32 representation for bitwise-or, so the
> impossible conversion does not trigger (it only triggers with
> None representation), and we could end up with unsupported
> conversions from Word32.
>
> - even if we inserted impossible conversions, they are pure conversions.
> Since untagging, bitwise-or operations are also pure, we could hoist
> all these before the smi check of the inputs and we could hit the
> impossible conversions before we get to the smi check.
>
> This CL addresses this by just providing dummy values for conversions
> from the Type::None type. It also removes the impossible-to-* conversions.
>
> BUG=chromium:638132
>
> Committed: https://crrev.com/c83b21ab755f1420b6da85b3ff43d7e96ead9bbe
> Cr-Commit-Position: refs/heads/master@{#38883}
TBR=mstarzinger@chromium.org,jarin@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=chromium:638132
Review-Url: https://codereview.chromium.org/2280613002
Cr-Commit-Position: refs/heads/master@{#38893}
There's no point in running the LoadElimination on asm.js functions and
it would take serious amount of effort to actually make it correct for
the deprecated parts of the pipeline.
R=jarin@chromium.org
BUG=v8:5308
Review-Url: https://codereview.chromium.org/2276273002
Cr-Commit-Position: refs/heads/master@{#38884}
Currently we choose the MachineRepresentation::kNone representation for
values of Type::None, and when converting values from the kNone representation
we use "impossible" conversions that will crash at runtime. This
assumes that the impossible conversions should never be hit (the only
way to produce the impossible values is to perform an always-failing
runtime check on a value, such as Smi-checking a string). Note that
this assumes that the runtime check is executed before the impossible
convesrion.
Introducing BitwiseOr type feedback broke this in two ways:
- we always pick Word32 representation for bitwise-or, so the
impossible conversion does not trigger (it only triggers with
None representation), and we could end up with unsupported
conversions from Word32.
- even if we inserted impossible conversions, they are pure conversions.
Since untagging, bitwise-or operations are also pure, we could hoist
all these before the smi check of the inputs and we could hit the
impossible conversions before we get to the smi check.
This CL addresses this by just providing dummy values for conversions
from the Type::None type. It also removes the impossible-to-* conversions.
BUG=chromium:638132
Review-Url: https://codereview.chromium.org/2266823002
Cr-Commit-Position: refs/heads/master@{#38883}
This introduces appropriate unit tests to ensure that merging of
elements/fields information is correct for diamonds.
BUG=chromium:639210,v8:5266
R=jarin@chromium.org
Review-Url: https://codereview.chromium.org/2278043002
Cr-Commit-Position: refs/heads/master@{#38881}
This patch fixes up one last case of redundant ExceptionEvents being
triggered in the debugger for Promises--it makes the default reject
handler for Promises (e.g., if the second argument for
Promise.prototype.then is missing) appear to the debugger as a
rethrow.
R=adamk@chromium.org,jgruber@chromium.org
BUG=v8:5167
Review-Url: https://codereview.chromium.org/2278643002
Cr-Commit-Position: refs/heads/master@{#38876}
Unfortunately, I was unable to produce a repro without asm.js. In normal
JavaScript, the bounds check renaming saves us.
I have not done anything about the index variable aliasing and handling
of differently sized elements yet!
BUG=chromium:639210, v8:5266
Review-Url: https://codereview.chromium.org/2270793004
Cr-Commit-Position: refs/heads/master@{#38874}
This preserves the original shared code of the underlying function when
bytecode is provided. The method in question should only ensure bytecode
is present, but should avoid switching compilation tiers of the given
function. It might be that the function was fast-tracked to baseline by
inlining without going through the interpreted tier first.
R=rmcilroy@chromium.org
TEST=mjsunit/regress/regress-crbug-635923
BUG=chromium:635923
Review-Url: https://codereview.chromium.org/2278543002
Cr-Commit-Position: refs/heads/master@{#38866}
Don't bother using %_IsJSReceiver, which immediately gets lowered to
ObjectIsReceiver anyways (by the JSIntrinsicLowering), but requires
some complicated rewiring of effect/control chains.
R=mstarzinger@chromium.org
BUG=chromium:640369
Review-Url: https://codereview.chromium.org/2271973003
Cr-Commit-Position: refs/heads/master@{#38864}
For O instanceof C, we only need to check the instance type while
iterating the prototypes of O instead of checking both the instance
type and the access check bit of the map. This is because we have
the explicit range of "special object types", which include both
JSProxy as well as the global object and proxy and all API objects
that might have access checks or interceptors. Also restructure the
loop exits somewhat to ensure that the branch cloning gets a chance
to actually eliminate the bit materialization for the results.
R=jarin@chromium.org
Review-Url: https://codereview.chromium.org/2263273003
Cr-Commit-Position: refs/heads/master@{#38860}
To make async/await catch prediction work well, this patch regularizes
the exception events sent to DevTools from various places in the Promise
lifecycle. The core is that there should be an exception event when the
rejection first starts, rather than when it is propagated.
- Several cases within Promise code which propagate errors are
modified to not trigger a new ExceptionEvent in that case, such
as .then on a rejected Promise and returning a rejected Promise
from .then, as well as Promise.race and Promise.all.
- Make Promise.reject() create an ExceptionEvent, subject to catch
prediction based on the Promise stack. This is important
so that, e.g., if "await Promise.reject()" will trigger a new
throw (rather than a silent rethrow of something that never
triggered an event in the first place).
BUG=v8:5167
Review-Url: https://codereview.chromium.org/2244003003
Cr-Commit-Position: refs/heads/master@{#38847}
Before this patch all tracing scopes in incremental marking would be reset
during a gc tracer start/stop cycle. This patch handles scopes the same way it
does other incremental marking metrics.
Also:
- Align finalization metric with regular marking metric.
- Smaller cleanups
BUG=chromium:639818
Review-Url: https://codereview.chromium.org/2273673002
Cr-Commit-Position: refs/heads/master@{#38834}
Drive-by fix: the order of parameters in the BinaryOpWithFeedback TurboFan code stubs now reflects the convention of having the context at the end.
BUG=v8:5273
Review-Url: https://codereview.chromium.org/2263253002
Cr-Commit-Position: refs/heads/master@{#38832}
This flag was only set on receiver scopes (declaration scopes) already. This makes it statically obvious.
BUG=v8:5209
Review-Url: https://codereview.chromium.org/2268333002
Cr-Commit-Position: refs/heads/master@{#38828}
- The static method CopyChars was actually used and has been extracted.
- It was used in tests, where it's been replaced w/ ExternalOneByteString...
- Only one test actually relied on Utf8 handling (as opposed to ASCII only),
and that was the test testing Utf8ToUtf16CharacterStream itself.
+66 -277 LOC :)
BUG=v8:4947
Review-Url: https://codereview.chromium.org/2256273002
Cr-Commit-Position: refs/heads/master@{#38824}
Before this patch all tracing scopes in incremental marking would be reset
during a gc tracer start/stop cycle. This patch handles scopes the same way it
does other incremental marking metrics.
Also:
- Align finalization metric with regular marking metric.
- Smaller cleanups
BUG=chromium:639818
R=jochen@chromium.org
Review-Url: https://codereview.chromium.org/2264033002
Cr-Commit-Position: refs/heads/master@{#38822}
Rebuilding (after touching certain files) is crazy slow because
includes are out of control.
Fixing it:
- Don't include stuff in headers unless necessary.
- Include the stuff you need, not some other stuff that happens to include the
stuff you need.
BUG=v8:5294
Review-Url: https://codereview.chromium.org/2268303002
Cr-Commit-Position: refs/heads/master@{#38818}
When preparing compilation, we can't delay error reporting either.
Also put handles during internalization into a deferred handle scope.
BUG=v8:5215
R=marja@chromium.org,rmcilory@chromium.org
Review-Url: https://codereview.chromium.org/2268983002
Cr-Commit-Position: refs/heads/master@{#38817}
This makes sure the deoptimizer picks bytecode prepared for debugging
when materializing an interpreted frame if one is available. This is
normally done by the interpreter entry trampoline and hence needs to be
replicated by the deoptimizer.
R=jarin@chromium.org
Review-Url: https://codereview.chromium.org/2271443003
Cr-Commit-Position: refs/heads/master@{#38815}
This avoids checking for outer_scope == nullptr in Scope::Scope
BUG=v8:5209
Review-Url: https://codereview.chromium.org/2266973002
Cr-Commit-Position: refs/heads/master@{#38812}
Port 28e3467a72 (r38361)
original commit message:
Adding new methods to the code stub assembler and interpreter
assembler to combine loading and untagging SMIs, so that on 64-bit
architectures we can avoid loading the full 64 bits and load the
32 interesting bits directly instead.
BUG=
Review-Url: https://codereview.chromium.org/2265043002
Cr-Commit-Position: refs/heads/master@{#38811}
This changes the compilation pipeline so that mixed stacks are allowed
when bytecode is preserved. This means there can be activations of both,
"baseline" as well as "unoptimized" code active on the stack at the same
time for any single given function.
R=rmcilroy@chromium.org
BUG=v8:4280
Review-Url: https://codereview.chromium.org/2267693002
Cr-Commit-Position: refs/heads/master@{#38809}
Make use of %IsAsmWasmCode in place of Wasm.instantiateModuleFromAsm,
in order to reduce the surface area of the Wasm object,
and to focus on testing asm.js coming in via the parser.
Ignore extra CONST_LEGACY assignment introduced by the parser
when modules have the form:
(function Foo(a, b, c) {..});
This requires both a validator and AsmWasmBuilder change.
Move stdlib use collection to import time,
to reject modules that import a function, even if not used.
BUG= https://bugs.chromium.org/p/v8/issues/detail?id=4203
LOG=N
R=jpp@chromium.org,titzer@chromium.org
Review-Url: https://codereview.chromium.org/2264913002
Cr-Commit-Position: refs/heads/master@{#38806}
This flag was shipped on in 52, so it's due for removal. The patch includes
removing the deprecated and unused-in-Blink API Promise::Chain, and many
test updates.
R=adamk@chromium.org
BUG=v8:4633
Review-Url: https://codereview.chromium.org/2267033002
Cr-Commit-Position: refs/heads/master@{#38804}
The following code was previously accepted:
async function f() {
let g = (await) => {};
}
But per the spec, using 'await' is disallowed in arrow parameters
by an early error rule (just as 'yield' is disallowed in arrow
params inside generators).
There was special logic in ParseUnaryExpression which seems to have been
there only to allow that case. Having removed it, we get a SyntaxError in
the right cases anyway when ParseUnaryExpression chokes on whatever
illegal token follows 'await' in the cases this code previously handled.
Also removes the unnecessary AsyncBindingPatternProduction enum value.
R=caitp@igalia.com, littledan@chromium.org
BUG=v8:4483
Review-Url: https://codereview.chromium.org/2258313002
Cr-Commit-Position: refs/heads/master@{#38802}
Includes fast paths in the runtime for
DictionaryElementsAccessor, FastSmiOrObjectElementsAccessor,
FastDoubleElementsAccessor, TypedElementsAccessor, and
SloppyArgumentsElementsAccessor.
BUG=
Review-Url: https://codereview.chromium.org/2232063002
Cr-Commit-Position: refs/heads/master@{#38800}
When doing a component build, some test binaries link against the object
files directly, bypassing the components. This results, however, and
rightly so, in linker warnings. In gyp, we just suppressed them. During
the transition to gn, this was dropped for two binaries.
Here I add the suppressions back in.
Long term, we should either change the tests to go through the public
API, or export the required symbols.
BUG=chromium:633688
R=jkummerow@chromium.org
Review-Url: https://codereview.chromium.org/2261123003
Cr-Commit-Position: refs/heads/master@{#38793}
Adds InterpreterCompilationJob as a sub-class of
CompilationJob, to enable off-thread bytecode
generation. Currently only used in
Interpreter::MakeBytecode.
As part of this change, CompilationJob is modified
to make it less specific to optimized compilation,
renaming the phases as follows:
- CreateGraph -> PrepareJob
- OptimizeGraph -> ExecuteJob
- GenerateCode -> FinalizeJob
RegisterWeakObjectsInOptimizedCode is also moved out
of CompilationJob and instead becomes a static function
on Compiler.
BUG=v8:5203
Committed: https://crrev.com/1fb6a7e697e8bc5b4af51647553741f966e00cdc
Committed: https://crrev.com/785990e9fc0dd9a9d963d25d0bed2909165e4ca9
Committed: https://crrev.com/d7c6195c4c5cdc080caa74dfe2ae9ecab69bea73
Review-Url: https://codereview.chromium.org/2240463002
Cr-Original-Original-Original-Commit-Position: refs/heads/master@{#38662}
Cr-Original-Original-Commit-Position: refs/heads/master@{#38668}
Cr-Original-Commit-Position: refs/heads/master@{#38725}
Cr-Commit-Position: refs/heads/master@{#38778}
