The Advance() function of the class responsible for iterating
environment uses didn't always advance as far as it could (relying on
the HasNext predicate to finish advancing). This is brittle.
The HasNext predicate also didn't advance as far as it could when it
was at the end of an environment level. This is a bug.
R=jkummerow@chromium.org
BUG=
TEST=
Review URL: http://codereview.chromium.org/6993023
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@8181 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
If type-feedback indicates that an expression was never executed in
the non-optimized code, we insert a forced deoptimization right away
to enable re-optimization if we ever hit this path.
With this change we still continue to build the graph. As a next step, we
should remove the dead code after the deoptimize.
I had to remove one assert about the optimization status in a test since
we now immediately deoptimize after exiting the loop that triggers OSR.
Also remove a restriction that control-flow from an inlined function in a
test context always reaches both true- and false-target.
Review URL: http://codereview.chromium.org/7105015
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@8140 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
- Introduce a class JSReceiver, that is a common superclass of JSObject and
JSProxy. Use JSReceiver where appropriate (probably lots of places that we
still have to migrate, but we will find those later with proxy test suite).
- Move appropriate methods to JSReceiver class (SetProperty,
GetPropertyAttribute, Get/SetPrototype, Lookup, and so on).
- Introduce new JSFunctionProxy subclass of JSProxy. Currently only a stub.
- Overhaul enum InstanceType:
* Introduce FIRST/LAST_SPEC_OBJECT_TYPE that ranges over all types that
represent JS objects, and use that consistently to check language types.
* Rename FIRST/LAST_JS_OBJECT_TYPE and FIRST/LAST_FUNCTION_CLASS_TYPE
to FIRST/LAST_[NON]CALLABLE_SPEC_OBJECT_TYPE for clarity.
* Eliminate the overlap over JS_REGEXP_TYPE.
* Also replace FIRST_JS_OBJECT with FIRST_JS_RECEIVER, but only use it where
we exclusively talk about the internal representation type.
* Insert JS_PROXY and JS_FUNCTION_PROXY in the appropriate places.
- Fix all checks concerning classification, especially for functions, to
use the CALLABLE_SPEC_OBJECT range (that includes funciton proxies).
- Handle proxies in SetProperty (that was the easiest part :) ).
- A few simple test cases.
R=kmillikin@chromium.org
Review URL: http://codereview.chromium.org/6992072
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@8126 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Our testing infrastructure uses exceptions to indicate
errors. assertUnreachable therefore throws an exception to indicate
that it was reached. Therefore, it cannot be used to check that an
exception was thrown using the pattern:
try {
shouldThrow();
assertUnreachable();
} catch(e) {
}
Such a test will always pass because assertUnreachable will throw an
exception if shouldThrow does not.
R=ricow@chromium.org
Review URL: http://codereview.chromium.org/7053035
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@8117 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
The approach is to handle the common case in the optimizing
compiler and to bailout for the rare corner cases.
This is done by initializing all local const-variables with
the hole value and disallowing any use of the hole value statically.
Review URL: http://codereview.chromium.org/6026006
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@8104 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Only IA32 version for now. I'll start porting.
Strict mode functions are to get 'undefined' as the receiver when
called with an implicit receiver. Modes are bad! It forces us to have
checks on all function calls.
This change attempts to limit the cost by passing information about
whether or not a call is with an implicit or explicit receiver in ecx
as part of the calling convention. The cost is setting ecx on all
calls and checking ecx on entry to strict mode functions.
Implicit/explicit receiver state has to be maintained by ICs. Various
stubs have to not clobber ecx or save and restore it.
CallFunction stub needs to check if the receiver is implicit when it
doesn't know from the context.
Review URL: http://codereview.chromium.org/7039036
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@8040 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
The only difference to revision 7763 is the implementation in the
builtins file for arm and x64, plus a move of Array.prototype.toString
and Array.prototype.toLocaleString from should throw on null or
undefined to the non generic test cases in the function-call test (due
to us not currently supporting generic cases with these to functions)
Review URL: http://codereview.chromium.org/6928007
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@7786 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
The corner case is calling a function named 'eval' that is looked up at
runtime and found in a non-global context (but not an extension object).
The bug is that we used the function itself as the receiver rather than
using the global object.
R=ager@chromium.org
TEST=has been added to the eval mjsunit test
Review URL: http://codereview.chromium.org/6893057
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@7696 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Encapsulate the helper functions in mjsunit.js.
Now only exposes the exception class and the assertXXX functions.
Make assertEquals use === instead of ==.
This prevents a lot of possiblefalse positives in tests, and avoids
having to do assertTrue(expected === actual) when you need it.
Fixed some tests that were either buggy or assuming == test.
Review URL: http://codereview.chromium.org/6869007
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@7628 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
- mutual inlining strict and non-strict functions in crankshaft.
- assignment to undefined variable with eval in scope.
- propagation of strict mode through lazy compilation.
BUG=
TEST=test/mjsunit/strict-mode.js test/mjsunit/strict-mode-opt.js
Review URL: http://codereview.chromium.org/6814012
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@7561 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
In the cases where a global property cell cannot be used in the optimized code
use standard load ic to get the property instead of bailing out.
This is re-committing r7212 and r7215 which where reverted in r7239 with the addition of recoring the source position in the hydrogen code for the LoadGlobalCell instruction. To record that position an optional position field has been added to the variable proxy AST node.
Review URL: http://codereview.chromium.org/6758007
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@7474 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Fix %NewObjectFromBound to correctly handle optimized frames (including those with inlined functions).
Fix %_IsConstructCall handling in hydrogen: when called from inlined function return false constant directly instead of emiting HIsConstructCall.
Fix success case in TraceInline.
BUG=v8:1229
TEST=test/mjsunit/regress/regress-1229.js
Review URL: http://codereview.chromium.org/6740023
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@7472 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Because we run all tests three times with different variant flags (to
test crankshaft) we might end up in a situation where we try to write
to the same serilization file from two different threads
simultaneously. The patch concats the variant flags at the end of the
serialization file name.
Review URL: http://codereview.chromium.org/6688068
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@7285 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
This makes us compatible with firefox. Earlier on we were somehow
compatible with safari - which will allow defining a getter even when
an existing getter is present and non-configurable. We would, however,
in addition to overwriting the getter also change configurable to
true. The approach used by firefox seems much more sound, i.e., why
should it be possible to use __defineGetter__ or __defineSetter__ to
overwrite a non-configurable getter or setter respectively.
I will file a bug on the webkit bugtracker.
Review URL: http://codereview.chromium.org/6658037
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@7143 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Used incorrect register for referencing RegExp data, so it always failed
to match the fast case.
When modifiying the object layout, it was possible to make it crash instead.
BUG=v8:1236
TEST=test/mjsunit/regress/regress-1236.js
Review URL: http://codereview.chromium.org/6635041
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@7091 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Move strict mode flag from TemporaryScope to Scope so that it can be accessed from variable binding code.
Arguments do not alias in strict mode (ia32, x64 and arm, codegen and full codegen).
Hydrogen tolerates null arguments_shadow().
In codegen-<arch> arguments object is allocated eagerly to capture values before they get modified.
Review URL: http://codereview.chromium.org/6625048/
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@7083 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
When deoptimizing from the key subexpression of a keyed arguments access,
the unoptimized code expects to find the value of the receiver on the
expression stack. The environment of the optimizing compiler did not
contain this value during evaluation of the key subexpression.
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@6981 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Resubmit of patch for issue 1145 with a few additions:
- Now also clears exceptions when calling Runtime_LazyRecompile.
- Sets function where parsing fails to not be optimizable.
BUG=v8:1145
TEST=test/mjsunit/regress/regress-1145.js
Review URL: http://codereview.chromium.org/6469050
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@6945 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
We can wrongly assume that exception which is not intended to be caught
by external try/catch should be caught if this exception inherits
external catcher from some previous exception. To prevent that,
clear external catcher when processing exceptions which cannot be
externally caught.
BUG=v8:1184
TEST=test/mjsunit/regress/regress-1184.js
Review URL: http://codereview.chromium.org/6538081
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@6905 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
The main issue was due to multiple recompilations of functions. Now
code objects are grouped by function using SFI object address.
JSFunction objects are no longer tracked, instead we track SFI object
moves. To pick a correct code version, we now sample return addresses
instead of JSFunction addresses.
tools/{linux|mac|windows}-tickprocessor scripts differentiate
between code optimization states for the same function
(using * and ~ prefixes introduced earlier).
DevTools CPU profiler treats all variants of function code as
a single function.
ll_prof treats each optimized variant as a separate entry, because
it can disassemble each one of them.
tickprocessor.py not updated -- it is deprecated and will be removed.
BUG=v8/1087,b/3178160
TEST=all existing tests pass, including Chromium layout tests
Review URL: http://codereview.chromium.org/6551011
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@6902 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
The old version only added extra space when we did indirect calls, but
the problem remains the same with normal calls that can be represented
as a single byte. When doing patching each call will always be at
least 2 bytes long because we use RUNTIME_ENTY as the reloc mode.
Review URL: http://codereview.chromium.org/6541053
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@6894 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
The class did not correctly implement the RequiredInputRepresentation.
I changed this functions to be abstract so that all hydrogen classes
must implement it.
As a convention instructions with zero input operands return None as input
representation.
Instructions that can handle all input representations without converting before
also have None as required input representation (e.g. HTest)
All other instructions need a proper required input representation.
Review URL: http://codereview.chromium.org/6538088
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@6891 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Call accessors in the global object prototype when initializing global
variables. Function declarations are special cased for compatibility
with Safari and setters are not called for them. If this special
casing was not done webkit layout tests would fail.
Make the declaration of global const variables in the presence of
callbacks a redeclaration error.
Handle const context slot declarations conflicting with a CALLBACK as
a redeclaration error. That is, unless it is on a context extension
object which is not a real object and therefore conceptually have no
accessors in prototype chains. Accessors in prototype chains of
context extension objects are explicitly ignored in SetProperty.
Review URL: http://codereview.chromium.org/6534029
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@6846 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
variables.
Make the declaration of global const variables in the presence of
callbacks a redeclaration error.
Handle const context slot declarations conflicting with a CALLBACK as
a redeclaration error. That is, unless it is on a context extension
object which is not a real object and therefore conceptually have no
accessors in prototype chains. Accessors in prototype chains of
context extension objects are explicitly ignored in SetProperty.
Review URL: http://codereview.chromium.org/6519050
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@6841 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
The baseline compiler does not materialize a value for expressions of
the form !expr in an effect context so the graph translation should
not produce such an environment, otherwise we risk targeting it by
deoptimization.
BUG=v8:1167
Review URL: http://codereview.chromium.org/6537018
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@6833 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
We currently leave the exception as pending without returning a Failure::Exception() value. This is either caught immediately if running with --debug-code, or caught later by an assert in debug mode.
This change makes the pending exception be cleared before returning from the failed optimization attempt.
BUG=v8::1145
TEST=test/mjsunit/regress/regress-1145.js
Review URL: http://codereview.chromium.org/6524039
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@6832 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
When deoptimizing to after an expression of the form (expr0 || expr1)
or (expr0 && expr1) in an effect context, the unoptimized code could
incorrectly see the value of the expression.
Handle the short-circuit binary operators specially in effect contexts.
This fixes the issue and will generate better code when the left
subexpression is boolean-valued.
BUG=v8:1166
Review URL: http://codereview.chromium.org/6519046
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@6831 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Strict mode flag is passed to runtime DELETE function
and then to JSObject::Delete(Property/Element) as STRICT_DELETION enum.
When deleting non-configurable property/eleemnt, TypeError is thrown.
Adding mozilla test to .gitignore.
Incorporate CR feedback.
Review URL: http://codereview.chromium.org/6515005/
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@6782 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
The current version uses SetObjectProperty which will not set the
value in case this is a readonly property. The spec explictly says
that a configurable but non writable property can have its value
changed with Object.defineProperty (because the same thing can be
accomplished by doing 3 calls (set writable to true, update the value,
set writable to false).
Review URL: http://codereview.chromium.org/6518004
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@6766 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Strict mode assignment to undefined reference.
Simple assignments (x = <value>) use CODE_TARGET_CONTEXT.
StoreIC stores its own strictness in extra_ic_state.
The strcitness is propagated as further ic stubs are generated.
Details:
* ReferenceError on assignment to non-resolvable reference in strict mode.
* Fix es5conform test expectation file.
* Add es5conform test suite into .gitignore.
* Fix Xcode project.
* Change implemented in virtual frame code generator, as well as full-codegen
for all architectures.
* Fix debugger test.
* Fix comment for CODE_TARGET_CONTEXT
* Implement remaining StoreIC stubs to be strict mode aware.
* Trace extra_ic_state() for ic code stubs.
Code Review URL: http://codereview.chromium.org/6474026/
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@6760 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Strict mode assignment to undefined reference.
Simple assignments (x = <value>) use CODE_TARGET_CONTEXT.
StoreIC stores its own strictness in extra_ic_state.
The strcitness is propagated as further ic stubs are generated.
Details:
* ReferenceError on assignment to non-resolvable reference in strict mode.
* Fix es5conform test expectation file.
* Add es5conform test suite into .gitignore.
* Fix Xcode project.
* Change implemented in virtual frame code generator, as well as full-codegen
for all architectures.
* Fix debugger test.
* Fix comment for CODE_TARGET_CONTEXT
* Implement remaining StoreIC stubs to be strict mode aware.
* Trace extra_ic_state() for ic code stubs.
Code Review URL: http://codereview.chromium.org/6474026/
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@6756 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
In the presence of JS accessors for elements on Object.prototype JSArray::SetFastElement
may throw or its behaviour can be altered. Instead operate on plain FixedArrays and
turn them into JSArry later.
BUG=v8:1130
TEST=test/mjsunit/regress/regress-1130.js
Review URL: http://codereview.chromium.org/6481001
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@6730 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
If we have a property access of the form this.x, where the access site sees
the global object, we can specialize the IC stub so that it performs a map
check without first performing a heap object check.
Ensure that we do not get in JS code with a non-JSObject this value by
deoptimizing at Function.prototype.apply if the first argument is not a
JSObject.
BUG=v8:1128
Review URL: http://codereview.chromium.org/6463025
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@6707 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
When constructing stack traces we interpret the deoptimization data for
optimized frames to find the receiver value. This value could sometimes be
eliminated from the deoptimization data if we though it was unused.
BUG=v8:1118
Review URL: http://codereview.chromium.org/6465023
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@6694 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
My previous patch added an assert which uncovered 1092 in the sputnik tests.
This patch adds the fix for 1092, which is to ensure that NormalizeProperties
does not get called for a JSGlobalProxy along all code paths.
Add sputnik tests to .gitignore.
BUG=
TEST=
Review URL: http://codereview.chromium.org/6286060
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@6627 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Record a safepoint with a deoptimization id for throw in optimized code. We
don't seem to much care what the AST ID is because we will not be using it
for lazy deoptimization (throw doesn't return to the point of throw). For
hygiene we use the actual ID of the throw expression. Throw is no longer a
control-flow instruction, but it's followed by an unconditional abnormal
exit. This is required to insert a simulate between the throw and the exit.
Make our optimized treatment of Function.prototype.apply act like a call and
have side effects. This ensures that it will get a lazy deoptimization
environment. Use that deoptimization ID in the safepoint for the call.
Deleting a property was also missing a deoptimization ID, though there was a
deoptimization environment assigned to the instruction. Record the
environment and use the deoptimization ID at the safepoint.
Review URL: http://codereview.chromium.org/6250105
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@6576 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Fixes JS portion of DefineOwnProperty when there is
an existing property and the new descriptor is generic.
Makes code follow spec steps more closely.
Fixes typo for check for unchanged enumerable in step 6.
Adds regression tests.
Fixes errors in object-define-property test
Don't normalize the JSGlobalProxy. Gets webkit http/tests/security/xss-DENIED-defineProperty.html working.
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@6561 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
other situations.
Do not use overwritten Object.prototype.hasOwnProperty and
Array.prototype.pop. Do not use split and join in the error formatting
implementation. They are too big to control and their generality is
not needed.
Review URL: http://codereview.chromium.org/6287041
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@6552 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
1. The placement of checks for negative zero has to be computed after
all conversion instructions have been inserted. I separated the code
into its own phase.
2. GVN need to take instruction flags into account when comparing
instructions for redundancy.
Review URL: http://codereview.chromium.org/6260035
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@6534 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Deletion of global properties puts 'the hole' in the global property
cell and updates the property details in the property dictionary with
the information that the property has been deleted. When setting
global properties that have been deleted in generated code we just
store the new value in the global property cell. This does not update
the property details in the property dictionary. Therefore, it looks
like the property is not there eventhough it was just reintroduced.
Perform 'the hole' checks in generated code for global property stores
and bail out of ICs and optimized code if storing to a property cell
that contains 'the hole'.
Review URL: http://codereview.chromium.org/6306014
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@6508 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
With SVN r6465 (reverting changes to scopes), a regression test for
deleting parameter variables has to change to reflect a semantic
change. It is now again possible to delete parameters from a function
that uses 'with' or 'try...catch'.
Review URL: http://codereview.chromium.org/6307014
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@6466 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Code generated for checks starting with primitive receivers skips one step
in the usual prototype checking algorithm, so the holder must always be set.
Not setting the holder did not cause an immediate failure because our
primitives have additional hidden prototypes before the real prototypes.
These extra objects in the chain usually contain no properties and so
allowed the right holders to be selected.
Review URL: http://codereview.chromium.org/6353014
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@6459 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
The function Runtime_LookupContext searches the context chain for a
LOOKUP slot and returns the object holding the slot. It returned the
global context if the slot was not found or if it was found in a
function's context or arguments object. This is not the correct
object to use for 'delete'.
Since this lookup function is only ever used when deleting LOOKUP
slots (those that have to go through a with or a scope with eval), it
is simply replaced with a Runtime_DeleteContextSlot function that does
the appropriate thing for all kinds of context lookups.
This fixes Chromium bug 70066.
http://code.google.com/p/chromium/issues/detail?id=70066
Review URL: http://codereview.chromium.org/6280013
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@6442 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
This is svn r6415 with a bugfix.
The bug was that we can have scopes with 0 heap slots (functions with
such scopes do not need a local context) and scopes with at least
Context::MIN_CONTEXT_SLOTS. The code generator only allocated a local
context if there were strictly more than Context::MIN_CONTEXT_SLOTS.
Before the change to with/arguments, it was impossible to actually get
a function scope with exactly Context::MIN_CONTEXT_SLOTS because every
such scope included a heap-allocated arguments (and arguments shadow)
slot.
Review URL: http://codereview.chromium.org/6248014
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@6426 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
- var eval | arguments
- catch (eval | arguments)
- 'with' is disabled
- function can't be named eval or arguments
Add FLAG_strict_mode
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@6422 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Before, we conservatively marked every variable in a scope as used if the
scope contained 'with'. Instead, just mark the variables occurring in the
body of the with. This avoids marking 'arguments' as used whenever 'with'
occurs, which incurs an extra performance penalty (a use of arguments is
seen as an instruction to redirect all parameter accesses to the arguments
object).
Review URL: http://codereview.chromium.org/6357007
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@6415 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
