Introducing the KeyAccumulator accidentally removed some crucial fast-paths.
This CL starts rewriting the KeyAccumulator, step-by-step introducing the
special cases again.
BUG=chromium:545503, v8:4758
LOG=y
Review URL: https://codereview.chromium.org/1707743002
Cr-Commit-Position: refs/heads/master@{#34532}
Frames entering of inside wasm don't have a function or context argument.
Adding distinct wasm frame and function types to express this.
Fixes a GC issue on several embenchen wasm tests, reenabling them.
BUG= https://code.google.com/p/v8/issues/detail?id=4203
TEST=mjsunit/wasm/embenchen
R=titzer@chromium.org,aseemgarg@chromium.org,jfb@chromium.org,yangguo@chromium.org
LOG=N
Review URL: https://codereview.chromium.org/1764603003
Cr-Commit-Position: refs/heads/master@{#34476}
ES2015 generally bans FunctionDeclarations in positions which expect a Statement,
as opposed to a StatementListItem, such as a FunctionDeclaration which constitutes
the body of a for loop. However, Annex B 3.2 and 3.4 make exceptions for labeled
function declarations and function declarations as the body of an if statement in
sloppy mode, in the latter case specifying that the semantics are as if the
function declaration occurred in a block. Chrome has historically permitted
further extensions, for the body of any flow control construct.
This patch addresses both the syntactic and semantic mismatches between V8 and
the spec. For the semantic mismatch, function declarations as the body of if
statements change from unconditionally hoisting in certain cases to acquiring
the sloppy mode function in block semantics (based on Annex B 3.3). For the
extra syntax permitted, this patch adds a flag,
--harmony-restrictive-declarations, which excludes disallowed function declaration
cases. A new UseCounter, LegacyFunctionDeclaration, is added to count how often
function declarations occur as the body of other constructs in sloppy mode. With
this patch, the code generally follows the form of the specification with respect
to parsing FunctionDeclarations, rather than allowing them in arbitrary Statement
positions, and makes it more clear where our extensions occur.
BUG=v8:4647
R=adamk
LOG=Y
Review URL: https://codereview.chromium.org/1757543003
Cr-Commit-Position: refs/heads/master@{#34470}
CallSite depends on using the function name to get ahold of the property
name from which an exception was thrown. This fix properly handles the
ES2015 names for getters and setters. The new tests pass both with
--harmony-function-name off and on.
BUG=v8:3699
LOG=n
Review URL: https://codereview.chromium.org/1751403004
Cr-Commit-Position: refs/heads/master@{#34469}
We cannot optimize away ToNumber conversions based on the Type that we
see in Crankshaft, as this might be the (unchecked or even pretruncated)
lower bound. We can only use the HType, which is based on the definition.
R=jkummerow@chromium.org
BUG=chromium:590989
LOG=n
Review URL: https://codereview.chromium.org/1757013002
Cr-Commit-Position: refs/heads/master@{#34445}
The function literal consists of a list of statements. Each statement
is associated with a statement position including break location. The
only exception to this rule is when the function immediately throws if
scope resolution found an illegal redeclaration. Make sure that we add a
break location for this case as well. The debugger relies on this.
R=bmeurer@chromium.org, vogelheim@chromium.org
BUG=v8:4690
LOG=N
Review URL: https://codereview.chromium.org/1759603002
Cr-Commit-Position: refs/heads/master@{#34422}
Adds the translation from optimized frame to bytecode offset
in FrameSummary. For interpreter, the bailout id represents the bytecode
array offset. So we can directly use the bailout id as the code offset
in the FrameSummary. Also updates mjsunit.status with more information
about failing tests.
BUG=v8:4280, v8:4689
LOG=N
Review URL: https://codereview.chromium.org/1740753002
Cr-Commit-Position: refs/heads/master@{#34393}
We used to emit debug break location on block entry. This cannot be
ported to the interpreted as we do not emit bytecode for block entry.
This made no sense to begin with though, but accidentally added
break locations for var declarations.
With this change, the debugger no longer breaks at var declarations
without initialization. This is in accordance with the fact that the
interpreter does not emit bytecode for uninitialized var declarations.
Also fix the bytecode to match full-codegen's behavior wrt return
positions:
- there is a break location before the return statement, with the source
position of the return statement.
- right before the actual return, there is another break location. The
source position points to the end of the function.
R=rmcilroy@chromium.org, vogelheim@chromium.orgTBR=rossberg@chromium.org
BUG=v8:4690
LOG=N
Review URL: https://codereview.chromium.org/1744123003
Cr-Commit-Position: refs/heads/master@{#34388}
ArrayIteratorPrototype must not provide Symbol.iterator.
R=rossberg
BUG=
Review URL: https://codereview.chromium.org/1749093002
Cr-Commit-Position: refs/heads/master@{#34386}
The for-of-finalization CL incorrectly removed the input argument from
BuildIteratorClose. I'm reverting this, adding a regression test, and fixing an
existing test that was wrong.
BUG=
R=rossberg
Review URL: https://codereview.chromium.org/1750543002
Cr-Commit-Position: refs/heads/master@{#34384}
The code used to [[Get]] the first element twice instead of once, which can be
observed (one of the kangax tests does so).
R=rossberg
BUG=
Review URL: https://codereview.chromium.org/1747933002
Cr-Commit-Position: refs/heads/master@{#34383}
The CompareICStub produces an untagged raw word value, which has to be
translated to true or false manually in the TurboFan code. But for lazy
bailout after the CompareIC, we immediately go back to fullcodegen or
Ignition with the raw value, to a location where both fullcodegen and
Ignition expect a boolean value, which might crash or in the worst case
(depending on the exact computation inside the CompareIC) could lead to
arbitrary memory access.
Short-term fix is to use the proper runtime functions (unified with the
interpreter now) for comparisons. Next task is to provide optimized
versions of these based on the CodeStubAssembler, which can then be used
via code stubs in TurboFan or directly in handlers in the interpreter.
R=mstarzinger@chromium.org
BUG=v8:4788
LOG=n
Review URL: https://codereview.chromium.org/1738153002
Cr-Commit-Position: refs/heads/master@{#34335}
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}
The %TailCall runtime entry and the %_TailCall intrinsic is not used,
and will never be used (because %TailCall doesn't actually do a tail
call). We will soon have proper ES6 tail calls, which are correct and
properly tested.
The %Apply runtime entry is basically a super-slow, less correct version
of Reflect.apply, so we can as well just use Reflect.apply, which is
exposed to builtins via %reflect_apply.
R=ishell@chromium.org
Review URL: https://codereview.chromium.org/1739233002
Cr-Commit-Position: refs/heads/master@{#34317}
The %_Call intrinsic (if supported by the compiler) is lowered directly
to the Call builtin and thus throws a TypeError if the target is not
callable. The %Call runtime function also eventually calls into the Call
builtin, but had an early abort if the target is not a JSReceiver, which
is unnecessary and leads to various test failures for Ignition.
R=mvstanton@chromium.org
Review URL: https://codereview.chromium.org/1727833006
Cr-Commit-Position: refs/heads/master@{#34316}
The treatment of different undetectable objects was inconsistent after
the latest changes to the undetectable bit in the maps. Given two
different undetectable JSObjects a and b, a monomorphic CompareIC would
say false for a == b, while the rest of the system (including the
generic case for the CompareIC) would say true.
The fix is rather straight-forward: We just go generic on a CompareIC
once we see an undetectable JSObject.
R=yangguo@chromium.org
Review URL: https://codereview.chromium.org/1735863004
Cr-Commit-Position: refs/heads/master@{#34315}
This patch moves iterator finalization (calling .return() when a
for-of loop exits early) to shipping. The only part of this feature
which is currently known to be missing is destructuring--.return()
should be also be called when destructuring with an array which
does not end in a rest pattern, but it currently does not. The rest
of this feature, including calling .return() from certain builtins,
is implemented.
R=adamk
BUG=v8:3566
LOG=Y
Review URL: https://codereview.chromium.org/1738463003
Cr-Commit-Position: refs/heads/master@{#34307}
By now the deprecation of strong mode is far enough along that the
support present in the interpreter matches the support in the other
compilers. Special expectations aren't needed anymore.
R=rmcilroy@chromium.org
Review URL: https://codereview.chromium.org/1738653003
Cr-Commit-Position: refs/heads/master@{#34293}
Handles stack overflow in interpreter.
1. When visiting function literal, if the shared function
info cannot be found we should return a stack overflow.
2. When visiting the ast graph, if stack overflow happens
then all the ast nodes are not visited, so we need to have
appropriate handling in the AccumulatorResultScope and
RegisterResultScope.
3. MakeBytecode should not return a suceess unconditionally.
If there is a stack overflow, it should return false, so
RangeError can be thrown.
BUG=v8:4280,v8:4680
LOG=N
Review URL: https://codereview.chromium.org/1721983005
Cr-Commit-Position: refs/heads/master@{#34282}
When there is no receiver object, plain function calls are a few
percent faster than %_Call().
This patch also fixes the HAS_INDEX macro used in a bunch of
Array.prototype functions to properly check for elements inherited
from prototypes.
Review URL: https://codereview.chromium.org/1706213002
Cr-Commit-Position: refs/heads/master@{#34269}
There was a bug in for-of loops without newly declared variables: If,
in performing the assignment, an exception were thrown, then
IteratorClose would not be called. The problem was that the assignment
is done as part of assign_each, which happens before the loop is put
back in the state which is recognized to be breaking/throwing/returning
early.
This patch modifies the for-of desugaring by setting the loop state
before, rather than after, evaluating the assign_each portion, which is
responsible for evaluating the assignment in for-of loops which do not
have a declaration.
This patch, together with https://codereview.chromium.org/1728973002 ,
allow all test262 iterator return-related tests to pass.
R=rossberg
BUG=v8:4776
LOG=Y
Review URL: https://codereview.chromium.org/1731773003
Cr-Commit-Position: refs/heads/master@{#34262}
In the for-of desugaring, IteratorClose is a subtle thing to get right.
When return exists, the logic for which exception to throw is as follows:
1. Get the 'return' property and property any exception that might come from
the property read
2. Call return, not yet propagating an exception if it's thrown.
3. If we are closing the iterator due to an exception, propagate that error.
4. If return threw, propagate that error.
5. Check if return's return value was not an object, and throw if so
Previously, we were effectively doing step 5 even if an exception "had already
been thrown" by step 3. Because this took place in a finally block, the exception
"won the race" and was the one propagated to the user. The fix is a simple change
to the desugaring to do step 5 only if step 3 didn't happen.
R=rossberg
BUG=v8:4775
LOG=Y
Review URL: https://codereview.chromium.org/1728973002
Cr-Commit-Position: refs/heads/master@{#34261}
This fixes a corner case that triggered an assert in full-codegens
operand stack depth tracking. We stop pushing operands if we overflow
the C-stack while iterating the AST. This makes the tracking go out of
sync before we fully returned from the tree traversal, at which point
the thrown RangeError will abort compilation.
R=ishell@chromium.org
TEST=mjsunit/regress/regress-crbug-589472
BUG=chromium:589472
LOG=n
Review URL: https://codereview.chromium.org/1732903002
Cr-Commit-Position: refs/heads/master@{#34255}
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}
There was an eval inside the array_natives_test() which prevented
Crankshaft, even tho it's unrelated, and so we always went to TurboFan
now, which both decreased test coverage and increased time for stress
opt runs.
R=machenbach@chromium.org
Review URL: https://codereview.chromium.org/1725383002
Cr-Commit-Position: refs/heads/master@{#34248}
This implements proper handling of local control flow (i.e. break and
continue) that spans the boundary of a do-expression. We can no longer
determine the number of operands to be dropped from the nesting of
statements alone, instead we use the new precise operand stack depth
tracking.
R=jarin@chromium.org
TEST=mjsunit/harmony/do-expressions-control
BUG=v8:4488
LOG=n
Review URL: https://codereview.chromium.org/1724753002
Cr-Commit-Position: refs/heads/master@{#34246}
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 Crankshaft fast case for String.fromCharCode() unconditionally
deoptimizes on all non-int32 inputs, even tho it would be perfectly
valid to just truncate the index to an int32.
R=ishell@chromium.org
BUG=chromium:587068
LOG=n
Review URL: https://codereview.chromium.org/1727873003
Cr-Commit-Position: refs/heads/master@{#34243}
These macro operators represent a conditional eager deoptimization exit
without explicit branching, which greatly reduces overhead of both
scheduling and register allocation, and thereby greatly reduces overall
compilation time, esp. when there are a lot of eager deoptimization
exits.
R=jarin@chromium.org
Review URL: https://codereview.chromium.org/1721103003
Cr-Commit-Position: refs/heads/master@{#34239}
We previously supported use of bitwise operations to convert
from intish to int, but use of kAsmInt in some places and kAsmIntQ
in others prevents this from working with heap accesses.
Switch to use kAsmIntQ where appropriate (even though intish_ != 0
in principle captures the superset of these cases),
as it's more conservative (and uses types.h better).
BUG= https://code.google.com/p/v8/issues/detail?id=4203
TEST=mjsunit/asm-wasm
R=aseemgarg@chromium.org,titzer@chromium.org
LOG=N
Review URL: https://codereview.chromium.org/1731603002
Cr-Commit-Position: refs/heads/master@{#34233}
This patch moves the ES2015 Symbol.species feature from staging to
shipping. @@species should be good to ship now that the regression
from fast-path cases in concat, slice and splice have been addressed.
R=adamk
BUG=v8:4093
LOG=Y
CQ_INCLUDE_TRYBOTS=tryserver.chromium.linux:linux_chromium_rel_ng;tryserver.blink:linux_blink_rel
Review URL: https://codereview.chromium.org/1721993002
Cr-Commit-Position: refs/heads/master@{#34226}
For now WasmFrame doesn't summarize the wasm frames. That'll require adding the
metadata in wasm-compiler similar to DeoptimizationInputData.
Teach the basic backtrace to iterate over stack frames instead of JS frames.
Update the wasm stack test.
`git cl format` touches random lines in files I touch.
R=titzer@chromium.org
TEST=d8 --test --expose-wasm test/mjsunit/mjsunit.js test/mjsunit/wasm/stack.js
Originally landed in: https://codereview.chromium.org/1712003003/
Reverted in: https://codereview.chromium.org/1730673002/
This patch puts the JSFunction on the C++ stack.
Review URL: https://codereview.chromium.org/1724063002
Cr-Commit-Position: refs/heads/master@{#34225}
Reason for revert:
[Sheriff] Seems to break gcmole:
https://build.chromium.org/p/client.v8/builders/V8%20Linux/builds/8295
Original issue's description:
> Add WasmFrame, backtraces reflect wasm's presence
>
> For now WasmFrame doesn't summarize the wasm frames. That'll require adding the
> metadata in wasm-compiler similar to DeoptimizationInputData.
>
> Teach the basic backtrace to iterate over stack frames instead of JS frames.
>
> Update the wasm stack test.
>
> `git cl format` touches random lines in files I touch.
>
> R=titzer@chromium.org
> TEST=d8 --test --expose-wasm test/mjsunit/mjsunit.js test/mjsunit/wasm/stack.js
>
> Committed: https://crrev.com/aeca945786dcccad3efecfddbf2c07aefa524a56
> Cr-Commit-Position: refs/heads/master@{#34220}
TBR=titzer@chromium.org,mvstanton@chromium.org,mstarzinger@chromium.org,jfb@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/1730673002
Cr-Commit-Position: refs/heads/master@{#34221}
For now WasmFrame doesn't summarize the wasm frames. That'll require adding the
metadata in wasm-compiler similar to DeoptimizationInputData.
Teach the basic backtrace to iterate over stack frames instead of JS frames.
Update the wasm stack test.
`git cl format` touches random lines in files I touch.
R=titzer@chromium.org
TEST=d8 --test --expose-wasm test/mjsunit/mjsunit.js test/mjsunit/wasm/stack.js
Review URL: https://codereview.chromium.org/1712003003
Cr-Commit-Position: refs/heads/master@{#34220}
This implements a mechanism to track the exact depth of the operand
stack in full-codegen for every sub-expression visitation. So far we
only tracked the depth at statement level, but not at expression level.
With the introduction of do-expressions it will be possible to construct
local control flow (i.e. break, continue and friends) that target labels
at an arbitrary operand stack depth, making this tracking a prerequisite
for full do-expression support.
R=rossberg@chromium.org,jarin@chromium.org
BUG=v8:4755,v8:4488
LOG=n
Review URL: https://codereview.chromium.org/1706283002
Cr-Commit-Position: refs/heads/master@{#34211}
When assigning to an integer view of the heap an intish
value does not need to be collapsed with |0.
Similarly a floatish value does not need to be collapsed with
fround when assigned to a float view of the heap.
i32[0] = i32_1 + i32_2; // ok
f32[0] = f32_1 + f32_2; // ok
However, floatish values cannot be safely assigned to double
arrays.
f64[0] = f32_1 + f32_2; // not ok
BUG= https://code.google.com/p/v8/issues/detail?id=4203
TEST=mjsunit/asm-wasm,test-asm-validator
R=aseemgarg@chromium.org,titzer@chromium.org
LOG=N
Review URL: https://codereview.chromium.org/1722473002
Cr-Commit-Position: refs/heads/master@{#34206}
It turns out that some old polyfill library uses
RegExp.prototype.flags as a way of feature testing. It's not clear
how widespread this is. For now, as a minimal workaround, we can
return undefined from getters like RegExp.prototype.global when
the receiver is RegExp.prototype. This patch implements that strategy
but omits a UseCounter to make backports easier.
R=adamk
CC=yangguo@chromium.org
BUG=chromium:581577
LOG=Y
CQ_INCLUDE_TRYBOTS=tryserver.chromium.linux:linux_chromium_rel_ng;tryserver.blink:linux_blink_rel
Review URL: https://codereview.chromium.org/1640803003
Cr-Commit-Position: refs/heads/master@{#34201}
In ES2016, the Proxy enumerate trap is removed. This patch changes
for-in iteration on Proxies to use the ownKeys trap. Due to the clean
organization of that code, the patch basically consists of deletions.
R=adamk
LOG=Y
BUG=v8:4768
Review URL: https://codereview.chromium.org/1717893002
Cr-Commit-Position: refs/heads/master@{#34200}
This patch makes ArraySpeciesCreate fast in V8 by avoiding two property reads
when the following conditions are met:
- No Array instance has had its __proto__ reset
- No Array instance has had a constructor property defined
- Array.prototype has not had its constructor changed
- Array[Symbol.species] has not been reset
For subclasses of Array, or for conditions where one of these assumptions is
violated, the full lookup of species is done according to the ArraySpeciesCreate
algorithm. Although this is a "performance cliff", it does not come up in the
expected typical use case of @@species (Array subclassing), so it is hoped that
this can form a good start. Array subclasses will incur the slowness of looking
up @@species, but their use won't slow down invocations of, for example,
Array.prototype.slice on Array base class instances.
Possible future optimizations:
- For the fallback case where the assumptions don't hold, optimize the two
property lookups.
- For Array.prototype.slice and Array.prototype.splice, even if the full lookup
of @@species needs to take place, we still could take the rest of the C++
fastpath. However, to do this correctly requires changing the calling convention
from C++ to JS to pass the @@species out, so it is not attempted in this patch.
With this patch, microbenchmarks of Array.prototype.slice do not suffer a
noticeable performance regression, unlike their previous 2.5x penalty.
TBR=hpayer@chromium.org
Review URL: https://codereview.chromium.org/1689733002
Cr-Commit-Position: refs/heads/master@{#34199}
The Proxy enumerate trap and Reflect.enumerate are removed from the
ES2016 draft specification. This patch removes the Reflect.enumerate
function, and a follow-on patch will be responsible for the Proxy
trap changes.
R=adamk
LOG=Y
BUG=v8:4768
Review URL: https://codereview.chromium.org/1721453002
Cr-Commit-Position: refs/heads/master@{#34196}
This was changed to match Annex B.2.5.1 of ES2015 and Firefox in
https://chromium.googlesource.com/v8/v8/+/469d9bfa, but website
breakage was seen in M49 Beta. JSC still returns undefined here.
BUG=chromium:585775
LOG=y
CQ_INCLUDE_TRYBOTS=tryserver.chromium.linux:linux_chromium_rel_ng;tryserver.blink:linux_blink_rel
Review URL: https://codereview.chromium.org/1714903004
Cr-Commit-Position: refs/heads/master@{#34172}
Adds a profiling counter to each BytecodeArray object, and adds
code to Jump and Return bytecode handlers to update this
counter by the size of the jump or the distance from the return
to the start of the function. This is more accurate than fullcodegen's
approach since it takes forward jumps into account as well as back-edges.
Modifies RuntimeProfiler to track ticks for interpreted frames.
Currently we use the SharedFunctionInfo::profiler_ticks() instead
of adding another to tick field to avoid adding another field to
BytecodeArray since SharedFunctionInfo::profiler_ticks() is only
used by Crankshaft otherwise so we shouldn't need both for
BUG=v8:4689
LOG=N
Review URL: https://codereview.chromium.org/1707693003
Cr-Commit-Position: refs/heads/master@{#34166}
We cannot omit flag check with kPointersToHereAreInterestingMask for maps because incremental marker dynamically sets and clears the flag.
BUG=chromium:587004
LOG=NO
Review URL: https://codereview.chromium.org/1714513003
Cr-Commit-Position: refs/heads/master@{#34165}
This CL introduces an import section that names functions to be imported
as well as a CallImport bytecode to call imports from this table.
R=binji@chromium.org,bradnelson@chromium.org
LOG=Y
BUG=chromium:575167
Review URL: https://codereview.chromium.org/1709653002
Cr-Commit-Position: refs/heads/master@{#34157}
The DataView constructor calls into C++ anyway, and is easier to deal
with this way, especially since we don't have the half initialized
object floating through JavaScript.
R=yangguo@chromium.org
Review URL: https://codereview.chromium.org/1712163002
Cr-Commit-Position: refs/heads/master@{#34145}
This CL also enhances a "tail-call-megatest" which now tests product of the following cases:
1) tail caller is inlined/not-inlined
2) tail callee is inlined/not-inlined
3) tail caller has an arguments adaptor frame above or not
4) tail callee has an arguments adaptor frame above or not
5) tail callee is a sloppy/strict/possibly eval/bound/proxy function
6) tail calling via normal call/function.apply/function.call
BUG=v8:4698
LOG=N
Review URL: https://codereview.chromium.org/1711863002
Cr-Commit-Position: refs/heads/master@{#34143}
Various syntactic forms now cause functions to have names where they
didn't before. Per the upcoming changes to the toString spec, only
a name that was literally part of a function's expression or declaration
is meant to be reflected in toString. This also happens to be the same
set of names that V8 currently outputs (without the --harmony-function-name
flag).
This required distinguishing anonymous FunctionExpressions from other sorts
of function definitions (like methods and getters/setters) in the AST, parser,
and at runtime.
The patch also takes the opportunity to remove one more argument (and enum)
from FunctionLiteral, as well as adding a special factory method for the
case of a FunctionLiteral representing toplevel or eval'd code.
BUG=v8:4760
LOG=n
Review URL: https://codereview.chromium.org/1712833002
Cr-Commit-Position: refs/heads/master@{#34132}
In ES2015, Date.prototype.toGMTString is simply an alias of
Date.prototype.toUTCString, so it has the same identity as a function and
doesn't have its own name. Firefox has already shipped this behavior.
Previously, we copied JSC behavior by making it a separate function.
This change makes an addition test262 test pass.
BUG=v8:4708
LOG=Y
R=adamk
Review URL: https://codereview.chromium.org/1709373002
Cr-Commit-Position: refs/heads/master@{#34131}
Reason for revert:
See Domenic's comment on the V8 bug.
Original issue's description:
> Use displayName in Error.stack rendering if present.
>
> BUG=v8:4761
> LOG=y
>
> Committed: https://crrev.com/953874e974037e7e96ef282a7078760ccc905878
> Cr-Commit-Position: refs/heads/master@{#34105}
TBR=jochen@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=v8:4761
Review URL: https://codereview.chromium.org/1713663002
Cr-Commit-Position: refs/heads/master@{#34129}
This frees up one bit in FunctionKind, which I plan to make slightly
more syntactic info about functions available in SharedFunctionInfo
(needed for ES2015 Function.name support).
BUG=v8:3956, v8:4760
LOG=n
Review URL: https://codereview.chromium.org/1704223002
Cr-Commit-Position: refs/heads/master@{#34125}
Moves the accumulator value on-heap to be restored in the
InterpreterNotifyDeopt handler rather than explicitly
setting the accumulator register. This allows it to be
materialized correctly if required.
BUG=v8:4678
LOG=N
Review URL: https://codereview.chromium.org/1707133003
Cr-Commit-Position: refs/heads/master@{#34113}
Implements iterator finalisation by desugaring for-of loops with an additional try-finally wrapper. See comment in parser.cc for details.
Also improved some AST printing facilities while there.
@Ross, I had to disable the bytecode generation test for for-of, because it got completely out of hand after this change (the new bytecode has 150+ lines). See the TODO that I assigned to you.
Patch set 1 is WIP patch by Georg (http://crrev.com/1695583003), patch set 2 relative changes.
@Georg, FYI, I changed the following:
- Moved try-finally out of the loop body, for performance, and in order to be able to handle `continue` correctly.
- Fixed scope management in ParseForStatement, which was the cause for the variable allocation failure.
- Fixed pre-existing zone initialisation bug in rewriter, which caused the crashes.
- Enabled all tests, adjusted a few others, added a couple more.
BUG=v8:2214
LOG=Y
Review URL: https://codereview.chromium.org/1695393003
Cr-Commit-Position: refs/heads/master@{#34111}
In case when F inlined normal call to G which tail calls H we should not write translation for G for the tail call site.
Otherwise we will see G in a stack trace inside H.
This CL also adds a "megatest" which tests product of the following cases:
1) tail caller is inlined/not-inlined
2) tail callee is inlined/not-inlined
3) tail caller has an arguments adaptor frame above or not
4) tail callee has an arguments adaptor frame above or not
5) tail callee is a normal/bound/proxy function
Note that tests for not yet supported cases are not run for now.
BUG=v8:4698
LOG=N
Review URL: https://codereview.chromium.org/1709583002
Cr-Commit-Position: refs/heads/master@{#34108}
The reason:
Similar to the CL 31552 (https://codereview.chromium.org/1419573007).
The CL 33972 (https://codereview.chromium.org/1698783002) optimized some JS function in regress-crbug-242924 test case by TurboFan compiler.
But it will hit the known issue that X87 will change a sNaN to qNaN by default. And then it will fail when comparing the source (sNaN) Hole NaN and
the result (qNaN) which was expected to be a (sNaN) Hole NaN too.
BUG=
Review URL: https://codereview.chromium.org/1704313003
Cr-Commit-Position: refs/heads/master@{#34104}
This CL introduces two new bytecodes TailCall and TailCallWide.
BUG=v8:4698,v8:4687
LOG=N
Review URL: https://codereview.chromium.org/1698273003
Cr-Commit-Position: refs/heads/master@{#34083}
Removes some cctest and mjsunit test skips on Ignition for tests that now pass.
BUG=v8:4680
LOG=N
Review URL: https://codereview.chromium.org/1703563002
Cr-Commit-Position: refs/heads/master@{#34045}
Various places assume that GetExpression returns the locals for a frame.
Modify InterpretedFrames such that GetExpression(0) returns the first
local, not the fixed parts of the interpreter frame.
BUG=v8:4690,v8:4680
LOG=N
Review URL: https://codereview.chromium.org/1697223003
Cr-Commit-Position: refs/heads/master@{#34040}
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}
Replaces the push of the dispatch table on the interpreted stack frame with a
push of the bytecode array. This enables the debugger to replace the bytecode
array with a patched version containing breakpoints.
BUG=v8:4690
LOG=N
Review URL: https://codereview.chromium.org/1699013002
Cr-Commit-Position: refs/heads/master@{#34032}
Fixes a bug in Ignition on Arm64 where lr gets trashed in StaContextSlot
which causes the stack walker to get confused and crash.
BUG=v8:4680
LOG=N
Review URL: https://codereview.chromium.org/1694263002
Cr-Commit-Position: refs/heads/master@{#34016}
for the special case where the same register is used as both left and
right input.
Review URL: https://codereview.chromium.org/1695283002
Cr-Commit-Position: refs/heads/master@{#33996}
Add a section identifier for declaring a start function as an index into
the function table. (This could also be done as a decl flag on the
function, but don't feel strongly here, since we probably want to redo
this when adding an import/export section.)
The start function must accept no parameters. Its return value is
currently ignored.
R=binji@chromium.org,bradnelson@chromium.org
BUG=chromium:575167
LOG=Y
Review URL: https://codereview.chromium.org/1692173002
Cr-Commit-Position: refs/heads/master@{#33978}
Adds support for ES6 super keyword and performing loads, stores, and
calls to super class members.
Implements SetHomeObject and enables ThisFunctionVariable.
BUG=v8:4280,v8:4682
LOG=N
Review URL: https://codereview.chromium.org/1689573004
Cr-Commit-Position: refs/heads/master@{#33977}
This is mostly preparation for allowing the function closure to be materialized.
As a drive-by fix, I have added ignition source position support to the frame inspector (this fixed some ignition test failures).
Review URL: https://codereview.chromium.org/1698743002
Cr-Commit-Position: refs/heads/master@{#33975}
Older versions of Emscripten appear to emit Asm.js containing:
HEAP8[x] with x in int
As opposed to the spec legal construct:
HEAP8[x>>0] with x in int
As older programs and even benchmarks such as Embenchen
include these constructs, support them for compatibility.
BUG= https://code.google.com/p/v8/issues/detail?id=4203
TEST=test-asm-validator,mjsunit/asm-wasm
R=aseemgarg@chromium.org,titzer@chromium.org
LOG=N
Review URL: https://codereview.chromium.org/1692713006
Cr-Commit-Position: refs/heads/master@{#33964}
Adds JumpIfNotHoleConstant and JumpIfNotHoleConstantWide bytecodes
and removes JumpIfHole bytecode.
In situations with large numbers of constants, the generator would
fail because an 8-bit constant could not be reserved for
JumpIfHole/JumpIfNotHole and so a 16-bit constant would be reserved.
Then when patching the bytecode the patcher would discover there was
no wide constant variant of the emitted jump.
BUG=v8:4280,v8:4680
LOG=N
Review URL: https://codereview.chromium.org/1697473002
Cr-Commit-Position: refs/heads/master@{#33952}
This removes support for the %Arguments and %ArgumentsLength runtime
entries and their intrinsic counterparts. If you need variable arguments
in any builtin, either use (strict) arguments object or rest parameters,
which are both compositional across inlining (in TurboFan), and not that
much slower compared to the %_Arguments hackery.
R=jarin@chromium.org
Review URL: https://codereview.chromium.org/1688163004
Cr-Commit-Position: refs/heads/master@{#33943}
The idea here is to perform the handler lookup in the deoptimizer, and then take the information from the handler table to build the catch handler frame in the deoptimizer. Specifically, we use the pc offset, context location and stack height (in full-code) to tweak the output frame.
Sadly, this still requires nasty voodoo for the liveness analyzer so that it keeps variables alive if they are used in the catch handler.
Review URL: https://codereview.chromium.org/1416543006
Cr-Commit-Position: refs/heads/master@{#33936}
Reason for revert:
No fix needed, original CL was perfectly fine!
Original issue's description:
> Revert of [interpreter] Correctly thread through catch prediction. (patchset #1 id:1 of https://codereview.chromium.org/1690973002/ )
>
> Reason for revert:
> Depends on the reverted https://codereview.chromium.org/1691723002
>
> Original issue's description:
> > [interpreter] Correctly thread through catch prediction.
> >
> > This change correctly sets the {CatchPrediction} field in exception
> > handler tables for bytecode and optimized code. It also adds tests
> > independent of promise handling for this prediction, to ensure all our
> > backends are in sync on their prediction.
> >
> > R=rmcilroy@chromium.org,yangguo@chromium.org
> > TEST=mjsunit/compiler/debug-catch-prediction
> > BUG=v8:4674
> > LOG=n
> >
> > Committed: https://crrev.com/ba55f5594cb0b4a1a1e9b35d87fe54afe2d93f3b
> > Cr-Commit-Position: refs/heads/master@{#33906}
>
> TBR=rmcilroy@chromium.org,yangguo@chromium.org,mstarzinger@chromium.org
> # Skipping CQ checks because original CL landed less than 1 days ago.
> NOPRESUBMIT=true
> NOTREECHECKS=true
> NOTRY=true
> BUG=v8:4674
>
> Committed: https://crrev.com/c5229b311968fd638a6cd537c341b1055eb7be97
> Cr-Commit-Position: refs/heads/master@{#33922}
TBR=rmcilroy@chromium.org,yangguo@chromium.org,adamk@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=v8:4674
Review URL: https://codereview.chromium.org/1689113004
Cr-Commit-Position: refs/heads/master@{#33933}
Remove some Ignition skips in mjsunit and cctest, and replace a few
others with fails now that the there is more debugger support.
BUG=v8:4680
LOG=N
Review URL: https://codereview.chromium.org/1689993002
Cr-Commit-Position: refs/heads/master@{#33932}
Reason for revert:
Depends on the reverted https://codereview.chromium.org/1691723002
Original issue's description:
> [interpreter] Correctly thread through catch prediction.
>
> This change correctly sets the {CatchPrediction} field in exception
> handler tables for bytecode and optimized code. It also adds tests
> independent of promise handling for this prediction, to ensure all our
> backends are in sync on their prediction.
>
> R=rmcilroy@chromium.org,yangguo@chromium.org
> TEST=mjsunit/compiler/debug-catch-prediction
> BUG=v8:4674
> LOG=n
>
> Committed: https://crrev.com/ba55f5594cb0b4a1a1e9b35d87fe54afe2d93f3b
> Cr-Commit-Position: refs/heads/master@{#33906}
TBR=rmcilroy@chromium.org,yangguo@chromium.org,mstarzinger@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=v8:4674
Review URL: https://codereview.chromium.org/1695613002
Cr-Commit-Position: refs/heads/master@{#33922}
This fact is depended upon by, at least, Parser::ParseLazy, and quite
likely by other code. There was already code in %FunctionSetName
enforcing this invariant. This patch adds similar code to
Factory::NewSharedFunctionInfo().
BUG=v8:4659
LOG=n
Review URL: https://codereview.chromium.org/1686193003
Cr-Commit-Position: refs/heads/master@{#33914}
Instead of doing a full function body traversal we collect return expressions and mark them after function parsing.
And since we rewrite do-expressions so that the result is explicitly assigned to a result variable the statements marking will never hit so I removed it from the AST.
BUG=v8:4698
LOG=N
Review URL: https://codereview.chromium.org/1693523002
Cr-Commit-Position: refs/heads/master@{#33911}
This change correctly sets the {CatchPrediction} field in exception
handler tables for bytecode and optimized code. It also adds tests
independent of promise handling for this prediction, to ensure all our
backends are in sync on their prediction.
R=rmcilroy@chromium.org,yangguo@chromium.org
TEST=mjsunit/compiler/debug-catch-prediction
BUG=v8:4674
LOG=n
Review URL: https://codereview.chromium.org/1690973002
Cr-Commit-Position: refs/heads/master@{#33906}
In the case of a simple fast-mode receiver without fancy properties, we
can just walk over the descriptor array to find all its initial property
names. As long as the map stays the same, we can also use that
descriptor array to figure out how to handle the properties.
This speeds up
https://github.com/kpdecker/six-speed/tree/master/tests/object-assign by
~2x.
BUG=
Review URL: https://codereview.chromium.org/1688953004
Cr-Commit-Position: refs/heads/master@{#33895}
