Vars without initialisers don't need to allocate a VariableProxy, as the
proxy expression is not really needed for anything. So, we can special
case declaration parsing to look ahead for a '=' (plus a few other
cases), and skip the variable proxy allocation if it isn't there.

As a side-effect, variables that are only declared but never used are
no longer marked is_used, and thus not allocated. This saves on
generating dead code.

Change-Id: Ie4f04c6b5c1138df4c2e17acf1f0150459b3b571
Reviewed-on: https://chromium-review.googlesource.com/c/1434376
Commit-Queue: Leszek Swirski <leszeks@chromium.org>
Reviewed-by: Toon Verwaest <verwaest@chromium.org>
Reviewed-by: Ross McIlroy <rmcilroy@chromium.org>
Cr-Commit-Position: refs/heads/master@{#59129}

Some debugging tests relied on the following anti-pattern:

 let exception = false;

 try {
   /* ... some code that may throw on test failure ... */
 } catch (e) {
   exception = e;
 }

 assertFalse(exception);

This may be problematic if a falseish value is thrown.

Change-Id: I02eace4cc656fc9581928a90ac53cda4dc72b30c
Reviewed-on: https://chromium-review.googlesource.com/972822Reviewed-by: Georg Neis <neis@chromium.org>
Commit-Queue: Jakob Gruber <jgruber@chromium.org>
Cr-Commit-Position: refs/heads/master@{#52105}

This CL adds support for:
* conditional breaks in setBreakpoint,
* locals in frame.local{Count,Name,Value},
* evaluation on a frame in frame.evaluate,
* and more detailed scope information in scopeObject.

Uses of several functions that are not covered by the
inspector protocol and are only used in tests have been removed.

Local handling has been modified to also include arguments as locals.
Inspector differs in this regard from our FrameDetails in that
arguments are always shown as locals. Argument-related functions
were removed.

BUG=v8:5530

Review-Url: https://codereview.chromium.org/2491543002
Cr-Commit-Position: refs/heads/master@{#40917}

R=svenpanne@chromium.org

Review URL: https://codereview.chromium.org/1183123002

Cr-Commit-Position: refs/heads/master@{#29018}

This adds context deoptimization to Turbofan and Crankshaft (also submitted separately as https://codereview.chromium.org/515723004/).

The second patchset removes the deoptimization/continuation block from calls.

BUG=
R=bmeurer@chromium.org

Review URL: https://codereview.chromium.org/522873002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@23547 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

Changed the debugger API to allow only one debug event listener to be registered. The public API now only has SetDebugEventListener instead of AddDebugEventListener and RemoveDebugEventListener.

Moved the registrered debug event listener from the context to a global handle in the Debugger class. Storing it in the context did not make much sense.

Changed a lot of tests to handle the API change.

BUG=1242707
Review URL: http://codereview.chromium.org/19753

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@1212 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

are always odd if the bit-field bits are included.

Modified a couple of debugger tests that relied on the ordering of
elements in descriptor arrays.  Descriptor arrays are sorted by
hash-code values, so the order changes if we change the hash code.
Review URL: http://codereview.chromium.org/6489

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@440 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

Added presubmit step to check copyright.



git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@242 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

In the shell sample don't print the result of executing a script, only
evaluating expressions.

Fixed issue when building samples on Windows using a shared V8
library.  Added visibility option on Linux build which makes the
generated library 18% smaller.

Changed build system to accept multiple build modes in one build and
generate seperate objects, libraries and executables for each mode.

Removed deferred negation optimization (a * -b => -(a * b)) since this
visibly changes operand conversion order.

Improved parsing performance by introducing stack guard in preparsing.
Without a stack guard preparsing always bails out with stack overflow.


git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@16 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

git-svn-id: http://v8.googlecode.com/svn/trunk@2 ce2b1a6d-e550-0410-aec6-3dcde31c8c00