Change the interpreter to always store the current context in the frame's
context slot instead of the function context. This makes it possible to
restore the correct context during deopt.
BUG=v8:4678,v8:4280
LOG=N
Review URL: https://codereview.chromium.org/1604923002
Cr-Commit-Position: refs/heads/master@{#33477}
This adds an explicit ReThrow bytecode to be used in the modelling of
try-finally statements. An exception that is being re-thrown should not
trigger message object creation or location computation and hence cannot
use the existing Throw bytecode.
R=rmcilroy@chromium.org
TEST=cctest/test-interpreter/InterpreterTryFinally
BUG=v8:4674
LOG=n
Review URL: https://codereview.chromium.org/1621673002
Cr-Commit-Position: refs/heads/master@{#33472}
This models function local control flow through try-finally constructs
using a token dispatch mechanism. All paths through the finally block
are assigned a token, at the end of the finally block a switch construct
dispatches according to this token.
R=oth@chromium.org,rmcilroy@chromium.org
BUG=v8:4674
LOG=n
Review URL: https://codereview.chromium.org/1613443002
Cr-Commit-Position: refs/heads/master@{#33465}
Break and continue operations need to pop the context chain to the
correct context before jumping to the target.
BUG=v8:4280,v8:4678
LOG=N
Review URL: https://codereview.chromium.org/1618693002
Cr-Commit-Position: refs/heads/master@{#33464}
This fixes the broken return address when the exception handler within
interpreted bytecode is being entered via stack unwinding. The address
in question will never actually be taken, but our stack walker uses this
address to determine whether a frame is interpreted.
R=rmcilroy@chromium.org
TEST=cctest/test-interpreter/InterpreterTryCatch
BUG=v8:4674
LOG=n
Review URL: https://codereview.chromium.org/1615063002
Cr-Commit-Position: refs/heads/master@{#33463}
This implements a first prototype of stack unwinding for interpreted
frames. The unwinding machinery performs a range-based lookup in the
given handler table and potentially continues dispatching at the handler
offset. Note that this does not yet correctly restore the context to the
correct value when the handler is being entered.
R=rmcilroy@chromium.org,oth@chromium.org
BUG=v8:4674
LOG=n
Review URL: https://codereview.chromium.org/1605633003
Cr-Commit-Position: refs/heads/master@{#33414}
This removes the above flag definition. The flag is no longer needed as
the default implementation is more than capable of faking presence of
handling of try-catch and try-finally constructs by now.
R=rmcilroy@chromium.org
BUG=v8:4674
LOG=n
Review URL: https://codereview.chromium.org/1603063003
Cr-Commit-Position: refs/heads/master@{#33402}
This implements a first version of exception handler table construction
within the interpreter. Note that the local control flow for try-catch
and try-finally statements is still off, and also stack unwinding does
not yet respect interpreter frames. But generated handler tables should
be populated correctly already.
R=oth@chromium.org
BUG=v8:4674
LOG=n
Review URL: https://codereview.chromium.org/1607433005
Cr-Commit-Position: refs/heads/master@{#33400}
o Adds wide variants of bytecodes that have operands describing ranges
of registers. The upcoming wide register support does not suppport
re-mapping ranges.
o Adds kRegPair16 and kRegTriple16 operands required for new wide
bytecodes and renames Count8/Count16 operands to RegCount8/RegCount16.
o Removes Exchange bytecodes
BUG=v8:4675
LOG=NO
Review URL: https://codereview.chromium.org/1595103006
Cr-Commit-Position: refs/heads/master@{#33389}
Fixes a bug where the context would be popped before labeled block break target
location.
BUG=v8:4280
LOG=N
Review URL: https://codereview.chromium.org/1601153002
Cr-Commit-Position: refs/heads/master@{#33388}
Now that we support eval in Ignition, remove the fallback for eval checks
and make the flag only fallback on catch blocks.
BUG=v8:4280,v8:4676
LOG=N
Review URL: https://codereview.chromium.org/1595223004
Cr-Commit-Position: refs/heads/master@{#33384}
VisitObjectLiteral has two parts. First it creates a literal and then
sets properties or accessor properties. Setting properties requires a
runtime call and it expects the literal object which was created in the
first part is contiguous with other registers it allocates. Since these
are allocated in a different scope they are not always contiguous.
This causes problems with mjsunit/setter-on-constructor-prototype.js.
This cl fixes by allocating contiguous registers in the inner scope.
Literal value is copied into the newly allocated register so that all
the required registers are always contiguous.
BUG=v8:4280
LOG=N
Review URL: https://codereview.chromium.org/1588903002
Cr-Commit-Position: refs/heads/master@{#33371}
Make ForInPrepare take a kRegTriple8 operand and ForInNext take kRegPair8
operand for cache state. This is to ensure that the cache state output of
ForInPrepare is in consecutive registers to allow us to deopt the
ForInPrepare node from TF->Ignition (to be done in a followup CL).
BUG=v8:4280
LOG=N
Review URL: https://codereview.chromium.org/1584813002
Cr-Commit-Position: refs/heads/master@{#33357}
Adds support for variable and function declarations in lookup slots to the
interpreter.
BUG=v8:4280
LOG=N
Review URL: https://codereview.chromium.org/1583783003
Cr-Commit-Position: refs/heads/master@{#33355}
Split RegisterAllocationScope out of ExpressionResult and allocate one
for each statement. This ensures that we always have an outer register
allocation scope for statement code (used in CountOperation and
RegisterExecutionResult). Also refactored the register allocator code to
move it to it's own file and rename from TemporaryRegisterScope to
BytecodeRegisterAllocator.
BUG=v8:4280
LOG=N
Review URL: https://codereview.chromium.org/1587033002
Cr-Commit-Position: refs/heads/master@{#33296}
Removes assignment hazard scope. Reverts back to the naive scheme of
allocating a temporary for every variable load. It was decided to revert it
because the current implementation does not handle logical expressions,
ternary operators, visiting objects in named/keyed loads. Also, we wanted
to evaluate alternate approaches and choose one when we have a mechanism
to measure performance.
BUG=v8:4280
LOG=N
Review URL: https://codereview.chromium.org/1576403004
Cr-Commit-Position: refs/heads/master@{#33269}
Adds support for LOOKUP_SLOT_CALL calls to the interpreter. Also changes
VisitCall to keep callee and reciever consecutive to avoid register
shuffles when performing LOOKUP_SLOT_CALL calls. Adds tests for the
interpreter and bytecode graph generator.
BUG=v8:4280
LOG=N
Review URL: https://codereview.chromium.org/1568323002
Cr-Commit-Position: refs/heads/master@{#33237}
This patch moves the semantics of 'const' in sloppy mode to match those
in strict mode, that is, const makes lexical (let-like) bindings, must
have an initializer, and does not create properties of the global object.
R=adamk
LOG=Y
BUG=v8:3305
CQ_INCLUDE_TRYBOTS=tryserver.chromium.linux:linux_chromium_rel_ng;tryserver.blink:linux_blink_rel
Review URL: https://codereview.chromium.org/1571873004
Cr-Commit-Position: refs/heads/master@{#33218}
Fixed a bug in VisitForInAssignment. After visiting the object the value
to be stored was not loaded back to the accumulator. Also added two tests
to check this case.
BUG=v8:4280
LOG=N
Review URL: https://codereview.chromium.org/1571753002
Cr-Commit-Position: refs/heads/master@{#33188}
Adds support for calling eval to the interpreter.
BUG=v8:4280
LOG=N
Review URL: https://codereview.chromium.org/1508293003
Cr-Commit-Position: refs/heads/master@{#33184}
This increases the size of addressable constant pool entries for jumps
to match other bytecodes using operands indexing the constant pool.
This change also introduces reservations for constant pool entries.
Reservations are used for forward jumps to ensure a constant pool entry
will be available when the jump target (label) is bound and the jump is
patched up in the bytecode array.
BUG=v8:4280
LOG=N
Review URL: https://codereview.chromium.org/1546683002
Cr-Commit-Position: refs/heads/master@{#33125}
New bytecodes for making registers with indicies wider than 1-byte
accessible.
BUG=v8:4280
LOG=N
Review URL: https://codereview.chromium.org/1555713002
Cr-Commit-Position: refs/heads/master@{#33091}
After this change (https://codereview.chromium.org/1507903004) to type feedback
vector, wide bytecodes for global/keyed/named load-stores were not generated due
to a change in the number of type feedback vector slots. This cl fixes tests to
generate wide bytecodes.
BUG=v8:4280
LOG=N
Review URL: https://codereview.chromium.org/1546923002
Cr-Commit-Position: refs/heads/master@{#33076}
Changes LoadGlobal, StoreGlobal, LoadNamedProperty, and StoreNamedProperty to accept
the name of variable instead of index into the constant pool entry. Also made
GetConstantPoolEntry as a private function since it is no longer used outside of
BytecodeArrayBuilder.
BUG=v8:4280
LOG=N
Review URL: https://codereview.chromium.org/1546643002
Cr-Commit-Position: refs/heads/master@{#33020}
Adds support for deleting a variable in a lookup slot. Adds a new bytecode,
its implementation and tests. Also adds support for this bytecode to the
bytecode graph builder.
BUG=v8:4280
LOG=N
Review URL: https://codereview.chromium.org/1542083002
Cr-Commit-Position: refs/heads/master@{#33019}
Consecutive registers are allocated in two passes. First we "reserve"
a set of registers and these get allocated when we actually use them.
If we request for a temporary register before we use all the consecutive
registers, the earlier implementation does not gaurantee that it allocates
outside the reservation for consecutive registers. This could cause problems
for example, in call_func(a, b++, c). This cl fixes
TemporaryRegisterScope::NewRegister, to return a new temporary register
outside the reservation for consecutive registers.
BUG=v8:4280
LOG=N
Review URL: https://codereview.chromium.org/1531273002
Cr-Commit-Position: refs/heads/master@{#33005}
A pre-requisite for this change was changing the interpreter to use
Runtime::ForInStep to bring the interpreter implementation closer
to the turbofan implementation. Also required to flatten out the
cache parameters into the interpreter frame for de-opt.
BUG=v8:4280
LOG=N
Review URL: https://codereview.chromium.org/1531693002
Cr-Commit-Position: refs/heads/master@{#32986}
Adds support for loading and storing lookup variables.
BUG=v8:4280
LOG=N
Review URL: https://codereview.chromium.org/1524803003
Cr-Commit-Position: refs/heads/master@{#32913}
This change adds support for local control flow when building graphs
from bytecode. The change ensures loop emitted from the bytecode
generator are in natural order so the only back branches are for loops.
BUG=v8:4280
LOG=N
Review URL: https://codereview.chromium.org/1502243002
Cr-Commit-Position: refs/heads/master@{#32911}
Adds implementation and tests for CreateObjectLiteral, CreateArrayLiteral and CreateRegExpLiteral
to bytecode graph builder. Also changes these bytecodes to expect three operands instead of using
accumulator to pass one of the operands. This is done to avoid looking into the earlier nodes to
fetch operands in the bytecode graph builder. Also adds support for wide variant of these
bytecodes to bytecode generator and bytecode graph builder.
BUG=v8:4280
LOG=N
Review URL: https://codereview.chromium.org/1503963002
Cr-Commit-Position: refs/heads/master@{#32710}
It's cumbersome to maintain IC profiler statistics all the time.
Let's just do it as needed.
BUG=
Review URL: https://codereview.chromium.org/1507903004
Cr-Commit-Position: refs/heads/master@{#32693}
Reason for revert:
Seems to be (mostly) responsible for the most recent Speedometer regression, not 100% sure. Let's see what the bots have to say.
Original issue's description:
> Provide call counts for constructor calls, surface them as a vector IC.
>
> CallIC and CallConstructStub look so alike, at least in the feedback they gather even if the implementation differs...and CallIC has such a nice way of surfacing the feedback (CallICNexus), that there is a request to make CallConstructStub look analogous. Enter ConstructICStub.
>
> BUG=
>
> Committed: https://crrev.com/66d5a9df62da458a51e8c7ed1811dc9660f4f418
> Cr-Commit-Position: refs/heads/master@{#32452}
TBR=mvstanton@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=
Review URL: https://codereview.chromium.org/1489413006
Cr-Commit-Position: refs/heads/master@{#32599}
CallIC and CallConstructStub look so alike, at least in the feedback they gather even if the implementation differs...and CallIC has such a nice way of surfacing the feedback (CallICNexus), that there is a request to make CallConstructStub look analogous. Enter ConstructICStub.
BUG=
Review URL: https://codereview.chromium.org/1476413003
Cr-Commit-Position: refs/heads/master@{#32452}
an optomization to remove redundant cast operations.
1. Adds an optimization to remove redundant ToBoolean and ToName operations.
2. Adds implementation and tests for cast operatorts to bytecode graph builder.
BUG=v8:4280
LOG=N
Review URL: https://codereview.chromium.org/1468003002
Cr-Commit-Position: refs/heads/master@{#32408}
Previously all contexts had a link to the global object, but what is
required in most cases (except for the global load, store and delete
case) is the native context.
This also removes the second dummy global object that was still linked
to every native context. We will add a different mechanism to ensure
that builtins do not pollute the actual global object during
bootstrapping.
Drive-by-fix: Unify some MacroAssembler magic and drop obsolete stuff.
CQ_INCLUDE_TRYBOTS=tryserver.v8:v8_linux_nosnap_rel
R=yangguo@chromium.org,mstarzinger@chromium.org
Committed: https://crrev.com/d290f204938295bfecc5c8e645ccfcff6e80ddb8
Cr-Commit-Position: refs/heads/master@{#32375}
Review URL: https://codereview.chromium.org/1480003002
Cr-Commit-Position: refs/heads/master@{#32381}
Reason for revert:
[Sheriff] Breaks:
https://build.chromium.org/p/client.v8/builders/V8%20Linux%20-%20nosnap/builds/5472
Original issue's description:
> [runtime] Replace global object link with native context link in all contexts.
>
> Previously all contexts had a link to the global object, but what is
> required in most cases (except for the global load, store and delete
> case) is the native context.
>
> This also removes the second dummy global object that was still linked
> to every native context. We will add a different mechanism to ensure
> that builtins do not pollute the actual global object during
> bootstrapping.
>
> Drive-by-fix: Unify some MacroAssembler magic and drop obsolete stuff.
>
> R=yangguo@chromium.org
>
> Committed: https://crrev.com/d290f204938295bfecc5c8e645ccfcff6e80ddb8
> Cr-Commit-Position: refs/heads/master@{#32375}
TBR=yangguo@chromium.org,mstarzinger@chromium.org,bmeurer@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
Review URL: https://codereview.chromium.org/1478303002
Cr-Commit-Position: refs/heads/master@{#32377}
Previously all contexts had a link to the global object, but what is
required in most cases (except for the global load, store and delete
case) is the native context.
This also removes the second dummy global object that was still linked
to every native context. We will add a different mechanism to ensure
that builtins do not pollute the actual global object during
bootstrapping.
Drive-by-fix: Unify some MacroAssembler magic and drop obsolete stuff.
R=yangguo@chromium.org
Review URL: https://codereview.chromium.org/1480003002
Cr-Commit-Position: refs/heads/master@{#32375}
ES6 section 12.2.8.1 states that flags for regular expression literals
must be checked during parsing and invalid flags are early errors. This
change adapts the Scanner and (Pre)Parser to act according to the spec.
This is also a prerequisite to unify the handling of literal creation
(for Objects, Arrays, Regexps, and at some point Classes).
R=yangguo@chromium.org
Review URL: https://codereview.chromium.org/1472323002
Cr-Commit-Position: refs/heads/master@{#32273}
This passes the new.target value in a register instead of through a
side-channel via the construct stub. The interpreter entry trampoline
stores this value in a bytecode register so that it can be accessed
directly by the interpreter. The size of the interpreter stack frame
hence grows by one slot.
R=oth@chromium.org
BUG=v8:4544
LOG=n
Review URL: https://codereview.chromium.org/1469313002
Cr-Commit-Position: refs/heads/master@{#32264}