Reason for revert:
Needed to revert https://codereview.chromium.org/1838283003/
Original issue's description:
> [builtins] Migrate String.prototype.charCodeAt and String.prototype.charAt to TurboFan.
>
> Make these builtins fast by default w/o relying on the
> %_StringCharCodeAt and %_StringCharAt intrinsics, which we cannot deal
> with well in TurboFan (and ignition).
>
> R=epertoso@chromium.org
>
> Committed: https://crrev.com/43d3331d87f68ea7efa1b58f559f33f60e5dacfb
> Cr-Commit-Position: refs/heads/master@{#35350}
TBR=epertoso@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/1870993002
Cr-Commit-Position: refs/heads/master@{#35351}
Make these builtins fast by default w/o relying on the
%_StringCharCodeAt and %_StringCharAt intrinsics, which we cannot deal
with well in TurboFan (and ignition).
R=epertoso@chromium.org
Review URL: https://codereview.chromium.org/1868963002
Cr-Commit-Position: refs/heads/master@{#35350}
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}
Currently, snapshot_toolchain is hardcoded to use a clang host
toolchain. Use a GCC toolchain if is_clang is false.
Revert this when this is root-caused (see crbug.com/601486)
LOG=Y
BUG=601486
Review URL: https://codereview.chromium.org/1809643003
Cr-Commit-Position: refs/heads/master@{#35341}
This fixes corner cases where the layout of feedback vectors baked into
the snapshot is different from the expected layout, depending on some
runtime flags. We make sure the feedback vector is regenereated for
functions that are not compiled. Flag changes of this kind are only
allowed when code is not serialized.
An alternative solution would be to not serialize the feedback vector
for such cases in the first place. That solution however would have a
higher overhead, as it would required the serializer to be able to
recognize feedback vectors while generating a snapshot.
R=mvstanton@chromium.org
TEST=mjsunit/regress/regress-crbug-600995
BUG=chromium:600995
LOG=n
Review URL: https://codereview.chromium.org/1869693003
Cr-Commit-Position: refs/heads/master@{#35339}
Make sure we check that packed elements do not containt TheHole.
%DebugPrint:
- Only print the transition arrays for maps
- Print more detailed instance types directly for objects
- directly print the array length for JS_ARRAY objects
BUG=
Review URL: https://codereview.chromium.org/1870433003
Cr-Commit-Position: refs/heads/master@{#35338}
As originally implemented, a SingleNameBinding within a BindingPattern
was incorrectly interpreted as an assignment if an initializer was
present and that initializer was itself an AssignmentExpresion.
For example:
let x;
{ let [x = y = 1] = []; }
print(x); // expected: undefined, actual: 1
Extend the heuristic that detects the "context" of a destructuring
pattern to account for AssignmentExpressions within SingleNameBindings.
BUG=v8:4891
LOG=N
R=adamk@chromium.org
Review URL: https://codereview.chromium.org/1859423002
Cr-Commit-Position: refs/heads/master@{#35334}
Pushing undefined onto a FAST_DOUBLE_ARRAY does not enforce the right representation checks.
BUG=chromuim:599089
LOG=n
Review URL: https://codereview.chromium.org/1868973002
Cr-Commit-Position: refs/heads/master@{#35332}
Now that we no longer compile stubs from JavaScript source, but have
other means of generating stubs using our optimizing compilers, we can
assume that scope analysis has happened whenever prologues are being
assembled.
R=bmeurer@chromium.org
Review URL: https://codereview.chromium.org/1863333004
Cr-Commit-Position: refs/heads/master@{#35329}
Now that the SharedFunctionInfo is available to compilers all of the
time, we no longer need to rely on the literal for source printing.
R=titzer@chromium.org
Review URL: https://codereview.chromium.org/1866613003
Cr-Commit-Position: refs/heads/master@{#35326}
Nothing too important, but it helps localizing the cause of an error
much faster.
By the way, I also changed the output for assertThrows and
assertDoesNotThrow a bit.
All new arguments are optional, so everything is backwards compatible.
R=jfb@chromium.org, titzer@chromium.org
BUG=
Review URL: https://codereview.chromium.org/1866693002
Cr-Commit-Position: refs/heads/master@{#35322}
We have to preserve control flow so that the liveness analysis is less
confused. This CL fixes loops to preserve teh original control flow.
BUG=chromium:599710
LOG=n
Review URL: https://codereview.chromium.org/1863123002
Cr-Commit-Position: refs/heads/master@{#35318}
Port 974721c661
Original commit message:
Introduce a ResumeGeneratorTrampoline, which does the actual stack state
reconstruction (currently always restores a fullcodegen frame), and
introduce appropriate TurboFan builtins for %GeneratorPrototype%.next,
%GeneratorPrototype%.return and %GeneratorPrototype%.throw based on
this native builtin.
Also unify the flooding in case of step-in to always work based on
JSFunction and remove the special casing for JSGeneratorObject.
R=bmeurer@chromium.org, joransiu@ca.ibm.com, mbrandy@us.ibm.com, michael_dawson@ca.ibm.com, bjaideep@ca.ibm.com
BUG=chromium:513471
LOG=n
Review URL: https://codereview.chromium.org/1870483002
Cr-Commit-Position: refs/heads/master@{#35316}
This reduced fragmentation in spaces where black pages are not a requirement. The only spaces where we need black pages is old space, because of allocation folding and fast inline allocation in generated code.
BUG=chromium:599174
LOG=n
Review URL: https://codereview.chromium.org/1862063002
Cr-Commit-Position: refs/heads/master@{#35315}
Port 974721c661
Original commit message:
Introduce a ResumeGeneratorTrampoline, which does the actual stack state
reconstruction (currently always restores a fullcodegen frame), and
introduce appropriate TurboFan builtins for %GeneratorPrototype%.next,
%GeneratorPrototype%.return and %GeneratorPrototype%.throw based on
this native builtin.
Also unify the flooding in case of step-in to always work based on
JSFunction and remove the special casing for JSGeneratorObject.
R=bmeurer@chromium.org, joransiu@ca.ibm.com, jyan@ca.ibm.com, michael_dawson@ca.ibm.com, bjaideep@ca.ibm.com
BUG=chromium:513471
LOG=n
Review URL: https://codereview.chromium.org/1868683002
Cr-Commit-Position: refs/heads/master@{#35314}
This field duplicates information from the SharedFunctionInfo. Now that
backends are guaranteed to have a SharedFunctionInfo around, we drop it.
R=verwaest@chromium.org
Review URL: https://codereview.chromium.org/1860123003
Cr-Commit-Position: refs/heads/master@{#35312}
Debug asserts in code-generator-s390.cc are in place to ensure that overflow is only set when dealing with a sub or add opcode. However, the check only looked for kS390_Add/SubWithOverflow32, not kS390_Add/Sub which also sets overflow. This CL adds the second case to this assert check.
R=michael_dawson@ca.ibm.com,jyan@ca.ibm.com,mtbrandyberry@ca.ibm.com,joransiu@ca.ibm.com
BUG=
Review URL: https://codereview.chromium.org/1863983003
Cr-Commit-Position: refs/heads/master@{#35310}
All the counters, trace events and runtime call stats roughly create a 30%
overhead when calling into the runtime. This CL factors out the counters into
separate non-inlined functions. This way we can reduce the overhead to a
minimum and still have some useful stats without a compile-time flag.
BUG=chromium:596055
LOG=n
Review URL: https://codereview.chromium.org/1868513002
Cr-Commit-Position: refs/heads/master@{#35308}
If no objects allocated at a location are live when a profile is
collected we report a zero count sample. This is confusing to those
looking at the profiles and will leak memory.
We now delete allocations once the number of sampled live objects for
that location reaches zero.
R=ofrobots@google.com
BUG=
Review URL: https://codereview.chromium.org/1828333002
Cr-Commit-Position: refs/heads/master@{#35305}
