Also changed the way that transitioning stores are represented in
a PropertyAccessInfo: There's no dedicated kind, but DataFields
have an optional transition map.
R=jarin@chromium.org
BUG=v8:4470
LOG=n
Review URL: https://codereview.chromium.org/1416973014
Cr-Commit-Position: refs/heads/master@{#31692}
Rename ZoneTypeCache to TypeCache and use a single shared (immutable)
instance consistently to cache the most commonly used types. Also serves
as a chokepoint for defining those types, so we don't repeat the
definition (and possible bugs) in various places.
R=jarin@chromium.org
Review URL: https://codereview.chromium.org/1409763004
Cr-Commit-Position: refs/heads/master@{#31631}
Both the JSTypeFeedbackSpecializer and the JSTypeFeedbackLowering is
dead code by now, since the more general JSNativeContextSpecialization
deals with the property/global load/store type feedback in a way that
also interacts properly with inlining.
BUG=v8:4470
LOG=n
R=jarin@chromium.org
Review URL: https://codereview.chromium.org/1407913003 .
Cr-Commit-Position: refs/heads/master@{#31462}
When eagerly parsing arrow functions, expressions in default
parameter initializers are parsed in the enclosing scope,
rather than in the function's scope (since that scope does not
yet exist). This leads to VariableProxies being added to the
wrong scope, and scope chains for FunctionLiterals being incorrect.
This patch addresses these problems by adding a subclass of
AstExpressionVisitor that moves VariableProxies to the proper
scope and fixes up scope chains of FunctionLiterals.
This is a revert of the revert https://crrev.com/e41614a058426fb6102e4ab2dd4f98997f00c0fc
with a much-improved (though not yet perfect) Scope::ResetOuterScope
method which properly fixes not only the outer_scope_ pointer but also
fixes the inner_scope_ list in the relevant outer_scopes.
More work likely still needs to be done to make this work completely,
but it's very close to correct.
BUG=v8:4395
LOG=y
Review URL: https://codereview.chromium.org/1414283002
Cr-Commit-Position: refs/heads/master@{#31435}
Reason for revert:
Breaks nosnap: http://build.chromium.org/p/client.v8/builders/V8%20Linux%20-%20nosnap%20-%20debug%20-%202/builds/2407/steps/Check/logs/regress-4395
Original issue's description:
> [es6] Fix scoping for default parameters in arrow functions
>
> When eagerly parsing arrow functions, expressions in default
> parameter initializers are parsed in the enclosing scope,
> rather than in the function's scope (since that scope does not
> yet exist). This leads to VariableProxies being added to the
> wrong scope, and scope chains for FunctionLiterals being incorrect.
>
> This patch addresses these problems by adding a subclass of
> AstExpressionVisitor that moves VariableProxies to the proper
> scope and fixes up scope chains of FunctionLiterals.
>
> More work likely still needs to be done to make this work completely,
> but it's very close to correct.
>
> BUG=v8:4395
> LOG=y
>
> Committed: https://crrev.com/cf72aad39e51de9b7074ea039377c1812f4a2c6b
> Cr-Commit-Position: refs/heads/master@{#31402}
TBR=rossberg@chromium.org,caitpotter88@gmail.com,adamk@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=v8:4395
Review URL: https://codereview.chromium.org/1417463004
Cr-Commit-Position: refs/heads/master@{#31404}
When eagerly parsing arrow functions, expressions in default
parameter initializers are parsed in the enclosing scope,
rather than in the function's scope (since that scope does not
yet exist). This leads to VariableProxies being added to the
wrong scope, and scope chains for FunctionLiterals being incorrect.
This patch addresses these problems by adding a subclass of
AstExpressionVisitor that moves VariableProxies to the proper
scope and fixes up scope chains of FunctionLiterals.
More work likely still needs to be done to make this work completely,
but it's very close to correct.
BUG=v8:4395
LOG=y
Review URL: https://codereview.chromium.org/1405313002
Cr-Commit-Position: refs/heads/master@{#31402}
Removes a branch that checks for a condition that has been checked on dominators of the branch.
This introduces a new reducer that propagates the list of checked conditions (and their boolean values) through the control flow graph. If it encounters a branch checking a condition with a known value, the branch is eliminated.
The analysis relies on loops being reducible: if a condition has been checked on all paths to loop entry, then it is checked in the loop (regardless what of the conditions checked inside the loop).
The implementation is fairly naive and could be improved:
- all the operation on the condition lists could be made allocation-free when revisited.
- we could try to use a map structure rather than a linked list (to make
lookups faster).
- the merging of control flow could be changed to take into account
conditions from non-dominating paths (as long as all paths check
the condition).
Review URL: https://codereview.chromium.org/1376293005
Cr-Commit-Position: refs/heads/master@{#31347}
This moves JavaScript source files that are bundled with V8 into a
separate directory. The goal is to improve code readability and also
being able to formalize ideal reviewers by subsequently adding the
OWNERS file. These files almost exclusively contain implementations
of methods fully specified by ES6.
Note that files in the "debug" directory as well as the "d8.js" file
aren't affected by this change.
R=rossberg@chromium.org
Review URL: https://codereview.chromium.org/1398733002
Cr-Commit-Position: refs/heads/master@{#31230}
This separates the core machinery and the heuristics involved with
inlining functions calls. So far the heuristic only respects our
%SetForceInlineFlag hint, but it will the place where general inlining
heuristics can live without impeding clarity of the core machinery.
R=bmeurer@chromium.org
Review URL: https://codereview.chromium.org/1391903002
Cr-Commit-Position: refs/heads/master@{#31150}
Introduce a new JSGlobalSpecialization advanced reducer that runs
during the initial inlining and context specialization, and specializes
the graph to the globals of the native context. Currently we assume
that we do not inline cross native context, but long-term we will grab
the global object from the JSLoadGlobal/JSStoreGlobal feedback (with the
new global load/store ICs that are currently in the workings), and then
this whole specialization will be fully compositional even across
cross-context inlining.
Note that we cannot really handle most of the stores to global object
property cells because TurboFan doesn't have a mechanism to enforce
certain representations. Also note that we cannot yet fully benefit
from the type feedback collected on the global object property cells,
because the type system cannot deal with maps in a reasonable way.
CQ_INCLUDE_TRYBOTS=tryserver.v8:v8_linux_nosnap_rel
R=jarin@chromium.org
BUG=v8:4470
LOG=n
Committed: https://crrev.com/6fbf7903f94924ea066af481719898bd9667b6eb
Cr-Commit-Position: refs/heads/master@{#31139}
Review URL: https://codereview.chromium.org/1387393002
Cr-Commit-Position: refs/heads/master@{#31148}
Reason for revert:
Breaks GC stress: http://build.chromium.org/p/client.v8/builders/V8%20Linux64%20GC%20Stress%20-%20custom%20snapshot/builds/1984/steps/Bisect%20c5528ac1.Retry/logs/regress-crbug-450960
Original issue's description:
> [turbofan] Add initial support for global specialization.
>
> Introduce a new JSGlobalSpecialization advanced reducer that runs
> during the initial inlining and context specialization, and specializes
> the graph to the globals of the native context. Currently we assume
> that we do not inline cross native context, but long-term we will grab
> the global object from the JSLoadGlobal/JSStoreGlobal feedback (with the
> new global load/store ICs that are currently in the workings), and then
> this whole specialization will be fully compositional even across
> cross-context inlining.
>
> Note that we cannot really handle most of the stores to global object
> property cells because TurboFan doesn't have a mechanism to enforce
> certain representations. Also note that we cannot yet fully benefit
> from the type feedback collected on the global object property cells,
> because the type system cannot deal with maps in a reasonable way.
>
> CQ_INCLUDE_TRYBOTS=tryserver.v8:v8_linux_nosnap_rel
> R=jarin@chromium.org
> BUG=v8:4470
> LOG=n
>
> Committed: https://crrev.com/6fbf7903f94924ea066af481719898bd9667b6eb
> Cr-Commit-Position: refs/heads/master@{#31139}
TBR=jarin@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=v8:4470
Review URL: https://codereview.chromium.org/1390073004
Cr-Commit-Position: refs/heads/master@{#31144}
Introduce a new JSGlobalSpecialization advanced reducer that runs
during the initial inlining and context specialization, and specializes
the graph to the globals of the native context. Currently we assume
that we do not inline cross native context, but long-term we will grab
the global object from the JSLoadGlobal/JSStoreGlobal feedback (with the
new global load/store ICs that are currently in the workings), and then
this whole specialization will be fully compositional even across
cross-context inlining.
Note that we cannot really handle most of the stores to global object
property cells because TurboFan doesn't have a mechanism to enforce
certain representations. Also note that we cannot yet fully benefit
from the type feedback collected on the global object property cells,
because the type system cannot deal with maps in a reasonable way.
CQ_INCLUDE_TRYBOTS=tryserver.v8:v8_linux_nosnap_rel
R=jarin@chromium.org
BUG=v8:4470
LOG=n
Review URL: https://codereview.chromium.org/1387393002
Cr-Commit-Position: refs/heads/master@{#31139}
This removes the lookup-inl.h header file, which actually would break
compilation if included more than once in the codebase. It only holds
methods used solely in the lookup.cc compilation unit.
R=verwaest@chromium.org
Review URL: https://codereview.chromium.org/1375843004
Cr-Commit-Position: refs/heads/master@{#31104}
Previous to this patch, both the lithium and TurboFan register
allocators tracked allocated registers by "indices", rather than
the register codes used elsewhere in the runtime. This patch
ensures that codes are used everywhere, and in the process cleans
up a bunch of redundant code and adds more structure to how the
set of allocatable registers is defined.
Some highlights of changes:
* TurboFan's RegisterConfiguration class moved to V8's top level
so that it can be shared with Crankshaft.
* Various "ToAllocationIndex" and related methods removed.
* Code that can be easily shared between Register classes on
different platforms is now shared.
* The list of allocatable registers on each platform is declared
as a list rather than implicitly via the register index <->
code mapping.
Committed: https://crrev.com/80bc6f6e11f79524e3f1ad05579583adfd5f18b2
Cr-Commit-Position: refs/heads/master@{#30913}
Committed: https://crrev.com/7b7a8205d9a00c678fb7a6e032a55fecbc1509cf
Cr-Commit-Position: refs/heads/master@{#31075}
Review URL: https://codereview.chromium.org/1287383003
Cr-Commit-Position: refs/heads/master@{#31087}
Reason for revert:
Failures on MIPS
Original issue's description:
> Remove register index/code indirection
>
> Previous to this patch, both the lithium and TurboFan register
> allocators tracked allocated registers by "indices", rather than
> the register codes used elsewhere in the runtime. This patch
> ensures that codes are used everywhere, and in the process cleans
> up a bunch of redundant code and adds more structure to how the
> set of allocatable registers is defined.
>
> Some highlights of changes:
>
> * TurboFan's RegisterConfiguration class moved to V8's top level
> so that it can be shared with Crankshaft.
> * Various "ToAllocationIndex" and related methods removed.
> * Code that can be easily shared between Register classes on
> different platforms is now shared.
> * The list of allocatable registers on each platform is declared
> as a list rather than implicitly via the register index <->
> code mapping.
>
> Committed: https://crrev.com/80bc6f6e11f79524e3f1ad05579583adfd5f18b2
> Cr-Commit-Position: refs/heads/master@{#30913}
>
> Committed: https://crrev.com/7b7a8205d9a00c678fb7a6e032a55fecbc1509cf
> Cr-Commit-Position: refs/heads/master@{#31075}
TBR=akos.palfi@imgtec.com,bmeurer@chromium.org,jarin@chromium.org,paul.lind@imgtec.com,titzer@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
Review URL: https://codereview.chromium.org/1380863004
Cr-Commit-Position: refs/heads/master@{#31083}
Previous to this patch, both the lithium and TurboFan register
allocators tracked allocated registers by "indices", rather than
the register codes used elsewhere in the runtime. This patch
ensures that codes are used everywhere, and in the process cleans
up a bunch of redundant code and adds more structure to how the
set of allocatable registers is defined.
Some highlights of changes:
* TurboFan's RegisterConfiguration class moved to V8's top level
so that it can be shared with Crankshaft.
* Various "ToAllocationIndex" and related methods removed.
* Code that can be easily shared between Register classes on
different platforms is now shared.
* The list of allocatable registers on each platform is declared
as a list rather than implicitly via the register index <->
code mapping.
Committed: https://crrev.com/80bc6f6e11f79524e3f1ad05579583adfd5f18b2
Cr-Commit-Position: refs/heads/master@{#30913}
Review URL: https://codereview.chromium.org/1287383003
Cr-Commit-Position: refs/heads/master@{#31075}
Adds support for short operands, starting with kIdx16. Introduces
BytecodeTraits to enable compile time determination of various traits for a
bytecode, such as size, operands, etc. Reworks BytecodeIterator,
BytecodeArrayBuilder and Bytecodes::Decode to support 16 bit operands. Adds
support to Interpreter to load 16 bit operands.
Also fixes a bug with ToBoolean where it wouldn't get emitted at the start
of a block, and added a test.
BytecodeTraits template magic inspired by oth@chromium.org.
BUG=v8:4280
LOG=N
Review URL: https://codereview.chromium.org/1370893002
Cr-Commit-Position: refs/heads/master@{#31058}
Improve bytecode generation for if when there's no else clause.
Display target addresses for jump instructions in
Bytecode::Disassemble().
BUG=v8:4280
LOG=N
Review URL: https://codereview.chromium.org/1373903005
Cr-Commit-Position: refs/heads/master@{#31052}
The comparison operators and ToBoolean are implemented by calling into
the runtime. There are new runtime methods are prefixed with Interpreter
to make use case clear.
BUG=v8:4280
LOG=N
Review URL: https://codereview.chromium.org/1369123002
Cr-Commit-Position: refs/heads/master@{#30983}
Reason for revert:
Failures on greedy RegAlloc, Fuzzer
Original issue's description:
> Remove register index/code indirection
>
> Previous to this patch, both the lithium and TurboFan register
> allocators tracked allocated registers by "indices", rather than
> the register codes used elsewhere in the runtime. This patch
> ensures that codes are used everywhere, and in the process cleans
> up a bunch of redundant code and adds more structure to how the
> set of allocatable registers is defined.
>
> Some highlights of changes:
>
> * TurboFan's RegisterConfiguration class moved to V8's top level
> so that it can be shared with Crankshaft.
> * Various "ToAllocationIndex" and related methods removed.
> * Code that can be easily shared between Register classes on
> different platforms is now shared.
> * The list of allocatable registers on each platform is declared
> as a list rather than implicitly via the register index <->
> code mapping.
>
> Committed: https://crrev.com/80bc6f6e11f79524e3f1ad05579583adfd5f18b2
> Cr-Commit-Position: refs/heads/master@{#30913}
TBR=akos.palfi@imgtec.com,bmeurer@chromium.org,jarin@chromium.org,paul.lind@imgtec.com,titzer@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
Review URL: https://codereview.chromium.org/1365073002
Cr-Commit-Position: refs/heads/master@{#30914}
Previous to this patch, both the lithium and TurboFan register
allocators tracked allocated registers by "indices", rather than
the register codes used elsewhere in the runtime. This patch
ensures that codes are used everywhere, and in the process cleans
up a bunch of redundant code and adds more structure to how the
set of allocatable registers is defined.
Some highlights of changes:
* TurboFan's RegisterConfiguration class moved to V8's top level
so that it can be shared with Crankshaft.
* Various "ToAllocationIndex" and related methods removed.
* Code that can be easily shared between Register classes on
different platforms is now shared.
* The list of allocatable registers on each platform is declared
as a list rather than implicitly via the register index <->
code mapping.
Review URL: https://codereview.chromium.org/1287383003
Cr-Commit-Position: refs/heads/master@{#30913}
It's been enabled since M45, which is now well into its stable period,
with no problems reported.
Review URL: https://codereview.chromium.org/1356793002
Cr-Commit-Position: refs/heads/master@{#30835}
This moves scavenging functionality into a separate component so that
neither the scavenger nor objects-visiting need to be exposed outside
the heap.
R=hpayer@chromium.org,mlippautz@chromium.org
Review URL: https://codereview.chromium.org/1323993004
Cr-Commit-Position: refs/heads/master@{#30712}
Replace the ADD, SUB, etc. builtins with proper runtime implementations,
and expose them as runtime calls that can be used by the code stubs and
the interpreter (for now).
Also remove all the support runtime functions for ADD, SUB and friends,
namely %NumberAdd, %NumberSub, and so on.
R=mstarzinger@chromium.org
CQ_INCLUDE_TRYBOTS=tryserver.v8:v8_linux_layout_dbg,v8_linux_nosnap_dbg
Review URL: https://codereview.chromium.org/1333843002
Cr-Commit-Position: refs/heads/master@{#30680}
This moves incremental marking steps from gc-idle-time-handler and heap to the new incremental marking task.
BUG=chromium:490559
LOG=NO
Review URL: https://codereview.chromium.org/1265423002
Cr-Commit-Position: refs/heads/master@{#30641}
- Modify js2c to accept --js and --nojs,
- modify mksnapshot to accept --startup_src
(instead of a positional parameter, so that it can be omitted),
- modify v8.gyp to use the above so that no target has multiple
output dependencies, and
- update GN to use the switches above.
(I have not succeeded in fixing the GYP->make translator to properly map
multi-output rules, so that they work as expected in all edge cases.
This CL signals defeat on that front, and instead I rewrite the GYP
file to avoid that situation in the first place.)
R=jochen@chromium.org
BUG=v8:4382
LOG=N
Review URL: https://codereview.chromium.org/1310273009
Cr-Commit-Position: refs/heads/master@{#30640}
{AtomicValue}: A simple integer value that can be atomically
read/set/incremented.
{AtomicEnumSet}: Similar to EnumSet this set basically represents an atomic
bitfield based on enums. Atomic operations guarantee that setting one bit does
not race with setting other bits.
{AtomicEnumFlag}: A flag that is based on an enum that can be read and
(attempted to be) changed atomically.
BUG=chromium:524425
LOG=N
Review URL: https://codereview.chromium.org/1310993004
Cr-Commit-Position: refs/heads/master@{#30560}
Note that this is only pulling out the bookkeeping side of things, the
marking visitor that actually records the statistics should also move
into the ObjectStats class. That will be done as a follow-up.
R=mlippautz@chromium.org
Review URL: https://codereview.chromium.org/1326793002
Cr-Commit-Position: refs/heads/master@{#30547}
Walk asm.js module ASTs, attach concrete type information
in preparation for generating a WASM module.
cctest test coverage (mjsunit coming in later CL).
Expressions, function tables, and foreign functions have coverage.
Statement coverage to be expanded in a later CL.
BUG= https://code.google.com/p/v8/issues/detail?id=4203
TEST=test-asm-validator
R=rossberg@chromium.org,titzer@chromium.org
LOG=N
Review URL: https://codereview.chromium.org/1322773002
Cr-Commit-Position: refs/heads/master@{#30520}
This CL us a pure refactoring that makes an empty compilation unit
including just "isolate.h" or "contexts.h" but not "objects-inl.h"
compile without warnings or errors. This is needed to further reduce
the header dependency tangle.
R=bmeurer@chromium.org
Review URL: https://codereview.chromium.org/1322883002
Cr-Commit-Position: refs/heads/master@{#30500}
This data structure uses the public heap API only and is not specific
to any heap internals. It should be usable throughout V8 and inclusion
of the header file should not be restricted.
R=titzer@chromium.org
Review URL: https://codereview.chromium.org/1320503004
Cr-Commit-Position: refs/heads/master@{#30443}
This change encompasses what is necessary to enable stack checks in loops without suffering large regressions.
Primarily, it consists of a new mechanism for dealing with deferred blocks by "splintering", rather than splitting, inside deferred blocks.
My initial change was splitting along deferred block boundaries, but the regression introduced by stackchecks wasn't resolved conclusively. After investigation, it appears that just splitting ranges along cold block boundaries leads to a greater opportunity for moves on the hot path, hence the suboptimal outcome.
The alternative "splinters" ranges rather than splitting them. While splitting creates 2 ranges and links them (parent-child), in contrast, splintering creates a new independent range with no parent-child relation to the original. The original range appears as if it has a liveness hole in the place of the splintered one. All thus obtained ranges are then register allocated with no change to the register allocator.
The splinters (cold blocks) do not conflict with the hot path ranges, by construction. The hot path ones have less pressure to split, because we remove a source of conflicts. After allocation, we merge the splinters back to their original ranges and continue the pipeline. We leverage the previous changes made for deferred blocks (determining where to spill, for example).
Review URL: https://codereview.chromium.org/1305393003
Cr-Commit-Position: refs/heads/master@{#30357}
Adding an AstExpressionVisitor to touch each expression node in
an AST.
Adding TypingReseter to clear the slate after a failed asm.js
validation that has set partial typing information.
Adding a ExpressionTypeCollector to walk the expressions
in an AST and emit them as a string for testing.
Adding tests of the above.
LOG=N
BUG= https://code.google.com/p/v8/issues/detail?id=4203
TEST=test-typing-reset,test-ast-expression-visitor
R=rossberg@chromium.org,titzer@chromium.org
Review URL: https://codereview.chromium.org/1288773007
Cr-Commit-Position: refs/heads/master@{#30336}
This make inclusion of unicode-inl.h in object.h absolete. Now most
compilation units don't require that header. It also breaks a cycle
within declarations of the scanner.h header.
This tries to remove includes of "-inl.h" headers from normal ".h"
headers, thereby reducing the chance of any cyclic dependencies and
decreasing the average size of our compilation units.
Note that this change still leaves 3 violations of that rule in the
code, checked with the "tools/check-inline-includes.sh" tool.
R=yangguo@chromium.org
Review URL: https://codereview.chromium.org/1287893006
Cr-Commit-Position: refs/heads/master@{#30268}
