Reason:
Regressions in various benchmarks.
Revert "Revert of Revert of [strong] Implement strong mode restrictions on property access (patchset #1 id:1 of https://codereview.chromium.org/1189153002/)"
This reverts commit 41405c0470.
Revert "X87: Revert of Revert of [strong] Implement strong mode restrictions on property access."
This reverts commit 48de5f4d6b.
Revert "Fix overlapping KeyedLoadIC bitfield."
This reverts commit 4e6c956abf.
Revert "MIPS64: Fix 'Revert of Revert of [strong] Implement strong mode restrictions on property access'."
This reverts commit 74f97b0d2a.
BUG=
Review URL: https://codereview.chromium.org/1199493002
Cr-Commit-Position: refs/heads/master@{#29166}
RegExpExecStub pushes callee-saved registers without setting up a frame. This confuses the stack iterator.
Other architectures do not save these registers.
BUG=chromium:487981
LOG=NO
TEST=mjsunit/regress/regress-487981
Review URL: https://codereview.chromium.org/1183593005
Cr-Commit-Position: refs/heads/master@{#29120}
Implements the strong mode proposal's restrictions on property access.
To be fully explored in a followup: proxies, interceptors, access checks, load from super
BUG=v8:3956
LOG=N
Review URL: https://codereview.chromium.org/1168093002
Cr-Commit-Position: refs/heads/master@{#29109}
Boolean "is_strong" parameters have begun to proliferate across areas where
strong mode semantics are different. This CL repurposes the existing
ObjectStrength enum as a replacement for them.
BUG=v8:3956
LOG=N
Review URL: https://codereview.chromium.org/1144183004
Cr-Commit-Position: refs/heads/master@{#28839}
When compiling on a laptop I like to concatenate the small test files.
This makes a big difference to compile times. These changes make that
easier.
R=ulan@chromium.org
BUG=
Review URL: https://codereview.chromium.org/1163803002
Cr-Commit-Position: refs/heads/master@{#28742}
Also introduce new interface descriptors for the trampoline and full
versions of those stubs.
Currently, the stubs aren't functional.
BUG=
Review URL: https://codereview.chromium.org/1149903005
Cr-Commit-Position: refs/heads/master@{#28597}
Enable clang's shorten-64-to-32 warning flag on ARM64, and fix the warnings
that arise.
BUG=
Review URL: https://codereview.chromium.org/1131573006
Cr-Commit-Position: refs/heads/master@{#28412}
Implements the strong mode proposal's restrictions on implicit conversions
for the binary >, >=, <, and <= operators.
BUG=v8:3956
LOG=N
Review URL: https://codereview.chromium.org/1130283002
Cr-Commit-Position: refs/heads/master@{#28370}
typeof was implemented as a runtime function. Calling it in
optimized code with a non-constant input becomes burdensome.
BUG=
Review URL: https://codereview.chromium.org/1114563003
Cr-Commit-Position: refs/heads/master@{#28260}
ArgumentsAdaptorStub for derived constructor (the one that needs
new.target) works in this way:
- If the constructor is invoked via the Construct stub, we know that
actual arguments always include new.target. ``arguments`` object
however should not include a new.target, therefore we remove it.
We achieve this by decrementing the argument count.
- If the constructor is invoked as a call, we do not care for a correct
``arguments`` array since the constructor will immediately throw on
entrance.
The bug is that the call could actually pass 0 actual arguments, but I
decrement unconditionally :(. The fix is to detect this case and avoid
decrementing. ``arguments`` is bogus, but it is ok as constructor
throws.
Long-term we should just remove mucking about with arguments for
new.target and just get it from the stack.
R=arv@chromium.org,rossberg@chromium.org
BUG=chromium:474783
LOG=Y
Review URL: https://codereview.chromium.org/1126783003
Cr-Commit-Position: refs/heads/master@{#28242}
Reason for revert:
All sorts of performance regressions
Original issue's description:
> Collect type feedback on result of Math.[round|ceil|floor]
>
> By recording invocations of these builtins that can return -0, we now learn to not emit Crankshaft code that only handles integer results, avoiding deopt loops.
>
> Committed: https://crrev.com/f36ecaf3a4d61568ca50a20718acce7dd5da9a5f
> Cr-Commit-Position: refs/heads/master@{#28215}
TBR=mvstanton@chromium.org,bmeurer@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
Review URL: https://codereview.chromium.org/1115973005
Cr-Commit-Position: refs/heads/master@{#28237}
When comparing a symbol to istself using <, <=, > or >= we need to
throw a TypeError. This is correctly handled in the runtime function
so if we are comparing a symbol fall back to use the runtime.
BUG=v8:4073
LOG=Y
R=rossberg@chromium.org
Review URL: https://codereview.chromium.org/1125783002
Cr-Commit-Position: refs/heads/master@{#28226}
By recording invocations of these builtins that can return -0, we now learn to not emit Crankshaft code that only handles integer results, avoiding deopt loops.
Review URL: https://codereview.chromium.org/1053143005
Cr-Commit-Position: refs/heads/master@{#28215}
Reason for revert:
Causes test failures on ARM bots related to cells and write barriers.
Original issue's description:
> Merge cellspace into old pointer space
>
> BUG=
>
> Committed: https://crrev.com/4e7163ce05f135918205c7855ae60a48e5d46cc5
> Cr-Commit-Position: refs/heads/master@{#27707}
TBR=hpayer@chromium.org,balazs.kilvady@imgtec.com,yangguo@chromium.org,verwaest@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=
Review URL: https://codereview.chromium.org/1053243003
Cr-Commit-Position: refs/heads/master@{#27711}
Thanks to some careful assumptions, we can examine the object found at
vector[slot] and trust it's a heap object where the second field is
either a map if it's a WeakCell, or definitely not a map if it's a
Symbol, String or FixedArray. Use this to save a memory read.
BUG=
Review URL: https://codereview.chromium.org/1032163002
Cr-Commit-Position: refs/heads/master@{#27631}
This switches full-codegen to no longer push and pop StackHandler
markers onto the operand stack, but relies on a range-based handler
table instead. We only use StackHandlers in JSEntryStubs to mark the
transition from C to JS code.
Note that this makes deoptimization and OSR from within any try-block
work out of the box, makes the non-exception paths faster and should
overall be neutral on the memory footprint (pros).
On the other hand it makes the exception paths slower and actually
throwing and exception more expensive (cons).
R=yangguo@chromium.org
TEST=cctest/test-run-jsexceptions/DeoptTry
Review URL: https://codereview.chromium.org/1010883002
Cr-Commit-Position: refs/heads/master@{#27440}
Handlers should be in charge of this work. The change uncovered a bug in
vector-ics related to keyed loads into strings. It's important for
StringCharCodeAtGenerator, a helper used in full code and in
LoadIndexedStringStub (a handler) to protect the vector and slot registers
when it makes a runtime call to convert a HeapNumber to a Smi.
It's still possible for the handler to MISS after this call, perhaps due
to out of bounds access. In that case, the vector and slot registers need
to be delivered safely to the MISS handler.
BUG=
Review URL: https://codereview.chromium.org/1028093002
Cr-Commit-Position: refs/heads/master@{#27377}
This ensures that there is only one stub that deals with unwinding the
stack. Having more than one place containing that logic is brittle and
error prone, especially when it is a corner case only for RangeErrors.
R=titzer@chromium.org
TEST=mjsunit/regress/regress-crbug-467047
BUG=chromium:467047
LOG=N
Review URL: https://codereview.chromium.org/1012103002
Cr-Commit-Position: refs/heads/master@{#27243}
A hydrogen code stub is not the best approach because it builds a frame
and doesn't have the technology to discard roots at tail call exits.
Platform-specific stubs provide much better performance at this point.
R=verwaest@chromium.org
BUG=
Review URL: https://codereview.chromium.org/988653003
Cr-Commit-Position: refs/heads/master@{#27235}
Fix the resulting warnings by renaming things apart.
BUG=v8:3947
LOG=n
Review URL: https://codereview.chromium.org/1009373002
Cr-Commit-Position: refs/heads/master@{#27219}
This involved renaming apart a few more intrinsics. In the long run,
we want to clean up redundant intrinsics which just delegate.
BUG=v8:3947
LOG=n
Review URL: https://codereview.chromium.org/984963002
Cr-Commit-Position: refs/heads/master@{#27043}
This extends the stack unwinding logic to respect optimized frames
and perform a lookup in the handler table to find handlers. It also
contains fixes to the API call stubs to allow a stack walk while
promoting scheduled exceptions.
R=jarin@chromium.org
TEST=cctest/test-run-jsexceptions
Review URL: https://codereview.chromium.org/969533004
Cr-Commit-Position: refs/heads/master@{#27016}
