Move replacements out of virtual object. Replacements are
global to the graph and are not dependent on the virtual
state (after they are discovered).
R=mstarzinger@chromium.org
BUG=v8:4586
LOG=n
Review URL: https://codereview.chromium.org/1527533002
Cr-Commit-Position: refs/heads/master@{#32838}
As discussed in person, this adds the code from v8-native-prototype into
V8 proper, guarded by GYP flags that do not build the code by default.
Passing wasm=on to 'make' or setting v8_wasm as a GYP flag activates
building of this code.
An additional header file is added to and exported from the compiler
directory, src/compiler/wasm-compiler.h. This exposes a limited interface
with opaque Node and Graph types to the decoder to build TF graphs, as
well as functions to compile WASM graphs.
The mjsunit tests added are blacklisted because they fail without the
WASM object exposed to JS, which is also disabled by the build config
option.
This corresponds closely to 5981e06ebc, with some formatting fixes and moving some files into src/compiler.
R=mstarzinger@chromium.org, bradnelson@chromium.org
BUG=
Review URL: https://codereview.chromium.org/1504713014
Cr-Commit-Position: refs/heads/master@{#32794}
Removes the dummy control and effect edges from the RMA Call nodes. This
requires a change to the node matchers to allow them to cope with nodes
which don't have control or effect matchers.
Review URL: https://codereview.chromium.org/1518673002
Cr-Commit-Position: refs/heads/master@{#32752}
Nowadays, representation inference and simplified lowering can insert the
right truncations based on the use.
Review URL: https://codereview.chromium.org/1512243002
Cr-Commit-Position: refs/heads/master@{#32747}
MachineType is now a class with two enum fields:
- MachineRepresentation
- MachineSemantic
Both enums are usable on their own, and this change switches some places from using MachineType to use just MachineRepresentation. Most notably:
- register allocator now uses just the representation.
- Phi and Select nodes only refer to representations.
Review URL: https://codereview.chromium.org/1513543003
Cr-Commit-Position: refs/heads/master@{#32738}
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}
Extract ToBoolean hints from the fullcodegen code object and put them
into the ToBoolean nodes created by the AstGraphBuilder. We currently
do not yet consume this feedback, that will be done in a followup CL.
R=mstarzinger@chromium.org
BUG=v8:4583
LOG=n
Review URL: https://codereview.chromium.org/1494973002
Cr-Commit-Position: refs/heads/master@{#32576}
This moves the proper handling for the end node withing the constructed
graph into the RawMachineAssembler. This simplifies all assemblers and
makes the handling of {Start} and {End} symmetrical.
R=bmeurer@chromium.org
Review URL: https://codereview.chromium.org/1493963003
Cr-Commit-Position: refs/heads/master@{#32563}
Also remove the ResultMode from ToBooleanStub and always return true or
false and use the same mechanism in fullcodegen. This is in preparation
for adding ToBoolean hints to TurboFan.
Drive-by-fix: We can use the power of the ToBooleanIC in TurboFan now
that the ResultMode is gone (and the runtime always returns true or
false from the miss handler).
R=mstarzinger@chromium.org
BUG=v8:4583
LOG=n
Review URL: https://codereview.chromium.org/1491223002
Cr-Commit-Position: refs/heads/master@{#32524}
We can constant fold %_IsJSReceiver(x) based on whether x is always a
receiver or can never be a receiver. This is important as
%_IsJSReceiver is inserted by the JSInliner.
R=jarin@chromium.org
BUG=v8:4544
LOG=n
Review URL: https://codereview.chromium.org/1486383003
Cr-Commit-Position: refs/heads/master@{#32519}
This is the first part of escape analysis for turbofan.
At the moment, there is no deopt support, and support
for loops is partial (only binary Phis are handled).
The CL includes 4 unittests.
There are also 8 new mjsunit tests, some of which are
skiped as they require features not yet implemented.
BUG=v8:4586
LOG=n
Review URL: https://codereview.chromium.org/1457683003
Cr-Commit-Position: refs/heads/master@{#32498}
Xori instruction can only have unisgned 16-bit immediates for right input,
as such it is not suitable for bit negation on mips.
TEST=unittests/InstructionSecetorTest.Word(32|64)XorMinusOneWithParameter
BUG=
Review URL: https://codereview.chromium.org/1485833003
Cr-Commit-Position: refs/heads/master@{#32478}
This is the initial support for binary operation hints on javascript
binary operators, i.e. JSAdd, JSSubtract and so on. The hints are
extracted from the fullcodegen code object before graph building and the
AstGraphBuilder puts those hints on the operators if available.
R=jarin@chromium.org
BUG=v8:4583
LOG=n
Review URL: https://codereview.chromium.org/1487973002
Cr-Commit-Position: refs/heads/master@{#32443}
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}
Add initial support to optimize certain "prototype" loads from known
JSFunctions which have a prototype. This includes an appropriate typing
rule plus a matching rule for typed lowering.
R=jarin@chromium.org
Review URL: https://codereview.chromium.org/1482213002
Cr-Commit-Position: refs/heads/master@{#32390}
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}
Decouple the implicit ToObject for with statements from the actual
creation of the with context. This way we can handle/optimize those
constructs separately.
R=mstarzinger@chromium.org
Review URL: https://codereview.chromium.org/1481753003
Cr-Commit-Position: refs/heads/master@{#32341}
Removing bytecode graph builder tests as they are high maintenance and
have limited use, ie they track changes in the implementation rather
than behaviour.
BUG=v8:4280
LOG=N
Review URL: https://codereview.chromium.org/1477783003
Cr-Commit-Position: refs/heads/master@{#32333}
Reason for revert:
This is also unsound for the reasons outlined in
https://codereview.chromium.org/1473073004/
Will reland the mjsunit test separately and help Fedor to implement a solution based on simplified operators.
Original issue's description:
> [machine-operator-reducer] fix float truncation
>
> Don't replace `TruncateFloat64ToInt32(RoundInt64ToFloat64(value))` with
> `value`. Generally, `value` may have a range bigger than the one that
> could fit into Int32. Replace it with `TruncateInt64ToInt32(value)`
> instead, and only if the `value` fits into Float64 without precision
> loss.
>
> Add missing mjsunit test for 52bit multiplication/division optimization
> that has landed in refs/heads/master@{#31899}.
>
> BUG=
> R=titzer@google.com
>
> Committed: https://crrev.com/64efa2a904773816968992628f0bf0f1b7ae82be
> Cr-Commit-Position: refs/heads/master@{#32227}
TBR=titzer@chromium.org,fedor@indutny.com
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=
Review URL: https://codereview.chromium.org/1468313009
Cr-Commit-Position: refs/heads/master@{#32312}
Reason for revert:
Unsound use of types in the MachineOperatorReducer. Will work on a sound solution with Fedor.
Original issue's description:
> [compiler] merge binary-operator-reducer
>
> Merge BinaryOperatorReducer into the MachineOperatorReducer class.
> It does not need `Revisit()` calls, because the newly inserted nodes are
> visited anyway, and there are no other methods that need AdvancedReducer
> there.
>
> BUG=
> R=titzer@chromium.org
>
> Committed: https://crrev.com/993ba9d2529a6401b3040b9263f8d06db7dbb4f1
> Cr-Commit-Position: refs/heads/master@{#32298}
TBR=titzer@chromium.org,fedor@indutny.com
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=
Review URL: https://codereview.chromium.org/1476763006
Cr-Commit-Position: refs/heads/master@{#32310}
Merge BinaryOperatorReducer into the MachineOperatorReducer class.
It does not need `Revisit()` calls, because the newly inserted nodes are
visited anyway, and there are no other methods that need AdvancedReducer
there.
BUG=
R=titzer@chromium.org
Review URL: https://codereview.chromium.org/1473073004
Cr-Commit-Position: refs/heads/master@{#32298}
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}
Don't replace `TruncateFloat64ToInt32(RoundInt64ToFloat64(value))` with
`value`. Generally, `value` may have a range bigger than the one that
could fit into Int32. Replace it with `TruncateInt64ToInt32(value)`
instead, and only if the `value` fits into Float64 without precision
loss.
Add missing mjsunit test for 52bit multiplication/division optimization
that has landed in refs/heads/master@{#31899}.
BUG=
R=titzer@google.com
Review URL: https://codereview.chromium.org/1433353006
Cr-Commit-Position: refs/heads/master@{#32227}
Adds code and tests to support CreateClosure bytecode when building
graphs.
BUG=v8:4280
LOG=N
Review URL: https://codereview.chromium.org/1458603012
Cr-Commit-Position: refs/heads/master@{#32224}
Change the runtime entries and their associated code stubs for object
and array literal creation to take the closure instead of the raw
literals pointer. This is way easier to deal with (and cleaner) in
TurboFan.
R=mstarzinger@chromium.org
Review URL: https://codereview.chromium.org/1469833005
Cr-Commit-Position: refs/heads/master@{#32220}
Put the constant parts of the CreateLiteralArray and CreateLiteralObject
operators into CreateLiteralParameters and properly use them everywhere.
R=mstarzinger@chromium.org
Review URL: https://codereview.chromium.org/1475613002
Cr-Commit-Position: refs/heads/master@{#32207}
* Adds a PrepareForTailCall instruction that bumps the stack in the case that
the number of parameters passed to the callee causes the stack to exceed the
calleer's frame size.
* Uses the gap resolver to move the saved caller return address and frame
pointer to the approprate location in the tail-called frame.
BUG=v8:4076
LOG=n
Review URL: https://codereview.chromium.org/1455833004
Cr-Commit-Position: refs/heads/master@{#32151}
This change introduces register re-mapping to avoid assignment hazards
in binary expressions. Expressions that cause problems typically have
the form y = x + (x = 4);. The problem occurs because the lhs value
evaluates to the register holding x. The rhs updates that register and
then applying the operation would use the new value as the lhs.
By tracking loads and stores in binary expressions the generator is now
able to detect when condition occurs and uses a temporary register for
the rhs value. When the binary expression evaluation is complete the
variable is updated with the latest temporary.
A new bytecode Mov performs this update without touching the
accumulator.
BUG=v8:4280
LOG=N
Review URL: https://codereview.chromium.org/1412683011
Cr-Commit-Position: refs/heads/master@{#32141}
Adds support for the New, CallRuntime and CallJSRuntime bytecodes in
BytecodeGraphBuilder. Also adds BuildLoadObjectField,
BuildLoadGlobalObject and BuildLoadNativeContextField helpers.
Landed on behalf of rmcilroy.
BUG=v8:4280
LOG=N
Review URL: https://codereview.chromium.org/1456483002
Cr-Commit-Position: refs/heads/master@{#32136}
This adds an explicit parameter to the call descriptor having kind
kJSCallFunction representing the new.target value. Note that for now
this parameter is not yet passed in and hence cannot be used yet. Also
contains some refactoring of how parameter index value are calculated,
establishing Linkage as the central point for such index computations.
This is a preparatory CL to allows us passing new.target in a register
instead of via a side-channel through the construct stub frame.
R=bmeurer@chromium.org
BUG=v8:4544
LOG=n
Review URL: https://codereview.chromium.org/1461973002
Cr-Commit-Position: refs/heads/master@{#32112}
This fixes undefined behavior with the OpParameter helper in some of our
node matchers. There was a constness mismatch of the template parameter.
R=oth@chromium.org,mythria@chromium.org
Review URL: https://codereview.chromium.org/1453973004
Cr-Commit-Position: refs/heads/master@{#32087}
...based on the 2-lock algorithm by M. Scott and M. Michael (1992).
BUG=chromium:524425
LOG=N
Review URL: https://codereview.chromium.org/1448283004
Cr-Commit-Position: refs/heads/master@{#32078}
Adds support for the LdaGlobal and StaGlobal bytecodes to the
BytecodeGraphBuilder. Also fixes a bug in the context node's parameter
index and start node inputs.
Landed on behalf of rmcilroy.
TBR=bmeuer@chromium.org,mythria@chromium.org
BUG=v8:4280
LOG=N
Review URL: https://codereview.chromium.org/1449373002
Cr-Commit-Position: refs/heads/master@{#32049}
Adds support for visiting the Call bytecode to the bytecode graph builder.
This change also adds the call type feedback slot to the Call bytecode.
This is not currently used by the interpreter, but is used by the
graph builder.
Also adds a CallWide varient of the Call bytecode, and adds the kCount16
operand type.
Landed on behalf of rmcilroy.
BUG=v8:4280
LOG=N
Review URL: https://codereview.chromium.org/1456453002
Cr-Commit-Position: refs/heads/master@{#32033}
Adds implementation and tests for following operators in bytecode graph builder:
-VisitLoadICSloppy
-VisitLoadICStrict
-VisitLoadICSloppyWide
-VisitLoadICStrictWide
The current implementation introduces empty frame states for frame state inputs expected by these operations.
BUG=v8:4280
LOG=N
Review URL: https://codereview.chromium.org/1419373007
Cr-Commit-Position: refs/heads/master@{#32026}
This change binds each {Cancelable} task to a so-called {CancelableTaskManager},
which is then used to handle concurrent cancelation as well as synchronizing
shutdown for already running tasks. Since ownership of tasks is transferred to
the platform executing a task (destructor), handling in the manager uses integer
ids. Note that this also mitigates (modulo integer size) the ABA problem.
All handling of {Cancelable} tasks is now encapsulated into the corresponding
manager, which is instantiated for each isolate.
R=hpayer@chromium.org
BUG=chromium:524425
LOG=N
CQ_EXTRA_TRYBOTS=tryserver.v8:v8_linux_arm64_gc_stress_dbg;tryserver.v8:v8_linux_gc_stress_dbg;tryserver.v8:v8_mac_gc_stress_dbg;tryserver.v8:v8_linux64_msan_rel;tryserver.v8:v8_linux64_tsan_rel;tryserver.v8:v8_mac64_asan_rel
Review URL: https://codereview.chromium.org/1409993012
Cr-Commit-Position: refs/heads/master@{#31997}
* Limit triggering of tail calls to explicit use of a new inline runtime
function %_TailCall. %_TailCall works just like %_Call except for using
tail-calling mechanics (currently only in TF).
* Remove hack that recognized some specific usages of %_Call and converted them
into tail calls.
* Support tail calls for all calls where the number of callee stack parameters
is less than or equal to the number of caller stack parameters.
* Use the gap resolver to swizzle parameters and registers to tail calls.
BUG=v8:4076
LOG=n
Review URL: https://codereview.chromium.org/1439613003
Cr-Commit-Position: refs/heads/master@{#31987}
Adds an optimization to omit generating Ldar/Star if the same register
is loaded or stored from the accumulator in the earlier instruction.
BUG=v8:4280
LOG=N
Review URL: https://codereview.chromium.org/1435283002
Cr-Commit-Position: refs/heads/master@{#31984}
This makes sure that inlining a constructor call to a function which
cannot be used as a constructor (e.g. strong mode function) still does
throw correctly when the implicit receiver is created.
R=bmeurer@chromium.org
TEST=mjsunit/regress/regress-inline-strong-as-construct
BUG=v8:4544
LOG=n
Review URL: https://codereview.chromium.org/1447443002
Cr-Commit-Position: refs/heads/master@{#31982}
This is necessary to allow more optimizations to take place between
the representation inference and change lowering. Perhaps we want
to rename SimplifiedLowering -> RepresentationInference and
ChangeLowering -> SimplifiedLowering.
Review URL: https://codereview.chromium.org/1439473003
Cr-Commit-Position: refs/heads/master@{#31976}
This adds initial support for fast inline allocations of JSObject
instances. It currently has exactly the same limitations as Crankshaft.
R=mstarzinger@chromium.org
BUG=v8:4544
LOG=n
Review URL: https://codereview.chromium.org/1441573004
Cr-Commit-Position: refs/heads/master@{#31957}
This passes both, the actual constructor and the original constructor,
to nodes having the {JSCreate} operator. This is required for allocating
properly subclassed implicit receiver objects.
R=verwaest@chromium.org
BUG=v8:4544
LOG=n
Review URL: https://codereview.chromium.org/1434873004
Cr-Commit-Position: refs/heads/master@{#31955}
This implements a first version of support for constructor call inlining
in the inlining machinery. For now we can only inline calls where the
actual constructor and the original constructor coincide (i.e. no super
constructor calls). Note that the target of a super constructor call is
loaded with a runtime call, so there is no way for it to be constant
promoted at the moment.
R=bmeurer@chromium.org
BUG=v8:4544
LOG=n
Review URL: https://codereview.chromium.org/1435873002
Cr-Commit-Position: refs/heads/master@{#31954}
This patch extends the typed lowering with a specialized version of 'instanceof' that is used if the "class", i.e. the constructor function, is a known constant.
Unittests check that replacement occurs as intended. Functional correctness is ensured by extensive unit tests covering instanceof already in the testsuite.
TESTS=unittests/JSTypedLoweringTest.{JSInstanceOfSpecializationWithSmiCheck,JSInstanceOfSpecializationWithoutSmiCheck,JSInstanceOfNoSpecialization}
Review URL: https://codereview.chromium.org/1407413014
Cr-Commit-Position: refs/heads/master@{#31916}
Use compare-negate instruction if the right-hand input to a compare is a
negate operation.
BUG=
Review URL: https://codereview.chromium.org/1410123009
Cr-Commit-Position: refs/heads/master@{#31866}
TurboFan didn't fully support the relevant ES6 type conversion
intrinsics like %_ToNumber, %_ToLength, %_ToName, %_ToString and
%_ToInteger until now, we always went to the runtime instead. These
intrinsics are now well supported in TurboFan, and we are even able to
generate quite decent code in some cases.
R=jarin@chromium.org
Review URL: https://codereview.chromium.org/1428243003
Cr-Commit-Position: refs/heads/master@{#31820}
This deprecates the ability of the raw machine assembler to utilize the
CallFunctionStub in preparation of the stub itself being deprecated. We
only used this to test instruction selection of calls to stubs that can
deoptimize, the test has been adapted.
R=verwaest@chromium.org
TEST=unittests/InstructionSelectorTest
Review URL: https://codereview.chromium.org/1408193006
Cr-Commit-Position: refs/heads/master@{#31799}
Use the Call builtin instead, which does the right thing(TM)
always, especially since the CallFunctionStub is going away.
R=jarin@chromium.org
BUG=v8:4413
LOG=n
Review URL: https://codereview.chromium.org/1410853007
Cr-Commit-Position: refs/heads/master@{#31794}
The callees are expected to properly set the number of actual
arguments passed to the callee, which is now represented correctly
in the TurboFan graphs by a new Parameter right before the context
Parameter. Currently this is only being used for outgoing calls.
Note that this requires disabling two of the TF code stub tests,
because of the JavaScript graphs are not automagically compatible
with abitrary (incoming) code stub interface descriptors. If we
want to support JS code stubs at all, then we need to find a sane
way to feed in this information.
Drive-by-fix: Don't insert a direct call to a classConstructor.
R=mstarzinger@chromium.org
BUG=v8:4413, v8:4428
LOG=n
Review URL: https://codereview.chromium.org/1410633006
Cr-Commit-Position: refs/heads/master@{#31789}
Adds support for calling JS runtime functions. Also changes the bytecode
array builder to allow calling functions with an invalid argument
register if the call takes no arguments.
Adds the bytecode CallJSRuntime.
BUG=v8:4280
LOG=N
Review URL: https://codereview.chromium.org/1410003003
Cr-Commit-Position: refs/heads/master@{#31774}
Corrects LdaGlobal to deal with TypeofMode::INSIDE_TYPEOF so that it
doesn't throw a reference error on undefined globals.
BUG=v8:4280
LOG=N
Review URL: https://codereview.chromium.org/1422443006
Cr-Commit-Position: refs/heads/master@{#31757}
Existing code was assuming that 'lexical' blocks were the same as basic
blocks, therefore code which emitted jumps within a lexical block (e.g.,
logical or) would in some occassions incorrectly omit a necessary
ToBoolean.
This change removes Enter/LeaveBlock from BytecodeArrayBuilder and
instead tracks basic blocks via label bindings and jump operations. The
change also ensures we don't emit dead code at the end of a basic block,
and adds tests of the edge cases.
BUG=v8:4280
LOG=N
Review URL: https://codereview.chromium.org/1406983010
Cr-Commit-Position: refs/heads/master@{#31741}
This moves the optimization for variables loads targeting lookup slots
in DYNAMIC_GLOBAL and DYNAMIC_LOCAL mode into the AstGraphBuilder. This
way we implicitly get all optimizations that target global loads and
context loads for free.
R=bmeurer@chromium.org
BUG=v8:4513
LOG=n
Review URL: https://codereview.chromium.org/1424943008
Cr-Commit-Position: refs/heads/master@{#31713}
Adds an optimization to emit JumpIfToBooleanTrue/False instead
of ToBoolean followed by JumpIfTrue/False if the value in the
accumulator is not boolean.
BUG=v8:4280
LOG=N
Review URL: https://codereview.chromium.org/1426913002
Cr-Commit-Position: refs/heads/master@{#31697}
This adds optimized lowering for JSConvertReceiver (in the general case)
and JSToObject in typed lowering. It also uses JSConvertReceiver for
direct calls in typed lowering.
R=mstarzinger@chromium.org
BUG=v8:4493
LOG=n
Review URL: https://codereview.chromium.org/1431543002
Cr-Commit-Position: refs/heads/master@{#31676}
In order to properly (lazy) bailout when converting the receiver for
sloppy mode functions (using the newly added JSConvertReceiver
operator), we need to have a bailout location right before every call
(also right before every %_Call and %_CallFunction), otherwise if the
JSConvertReceiver just reuses the lazy bailout frame state from the
JSCallFunction node, it will skip the whole function in case of lazy
bailout.
Note it should be impossible to trigger this currently because we do not
yet support AllocationSite code dependencies in TurboFan, which can
trigger this kind of lazy bailout; therefore it's not possible to write
a regression test (yet).
R=yangguo@chromium.org
BUG=v8:4493
LOG=n
Review URL: https://codereview.chromium.org/1425883004
Cr-Commit-Position: refs/heads/master@{#31668}
we may introduce moves that are redundant in the context of
moves on subsequent instructions. Currently, we only detect such
redundancies by allowing moves to skip over Nop instructions (true
nops, with no input/output). We can also skip over other cases, for
example over constant definitions (nop with an output), since whatever
moves happen above it do not influence the instruction's outcome.
We may be able to handle other cases, too - in subsequent CLs.
BUG=
Review URL: https://codereview.chromium.org/1422333003
Cr-Commit-Position: refs/heads/master@{#31662}
For..in introduces 3 new bytecodes ForInPrepare, ForInNext, and
ForInDone to start a for..in loop, get the next element, and check if
the loop is done.
For..in builds upon new LoopBuilder constructs for conditionally
breaking and continuing during iteration: BreakIf{Null|Undefined}
and ContinueIf{Null|Undefined}. New conditional jump bytecodes
support this succinctly: JumpIfNull and JumpIfUndefined.
Add missing check to BytecodeLabel that could allow multiple
forward referencess to the same label which is not supported.
BUG=v8:4280
LOG=N
Review URL: https://codereview.chromium.org/1422033002
Cr-Commit-Position: refs/heads/master@{#31651}
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}
Float(32|64)Min:
// (a < b) ? a : b
fcmp da, db
fcsel dd, da, db, lo
Float(32|64)Max:
// (b < a) ? a : b
fcmp db, da
fcsel dd, da, db, lo
BUG=
Review URL: https://codereview.chromium.org/1360603003
Cr-Commit-Position: refs/heads/master@{#31621}
