jochen@chromium.org [Wed, 26 Feb 2014 11:54:55 +0000 (11:54 +0000)]
A64: Decoder should not inherit from DecoderVisitor
BUG=none
R=ulan@chromium.org, rodolph.perfetta@arm.com
LOG=n
Review URL: https://codereview.chromium.org/
177073013
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@19560
ce2b1a6d-e550-0410-aec6-
3dcde31c8c00
jochen@chromium.org [Wed, 26 Feb 2014 11:53:19 +0000 (11:53 +0000)]
Add vi swap files to .gitignore
BUG=none
R=dcarney@chromium.org
LOG=n
Review URL: https://codereview.chromium.org/
181263002
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@19559
ce2b1a6d-e550-0410-aec6-
3dcde31c8c00
ishell@chromium.org [Tue, 25 Feb 2014 16:33:54 +0000 (16:33 +0000)]
Fix for failing asserts in HBoundsCheck code generation on x64: index register should be zero extended.
BUG=345820
LOG=N
R=verwaest@chromium.org
Review URL: https://codereview.chromium.org/
180013002
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@19549
ce2b1a6d-e550-0410-aec6-
3dcde31c8c00
verwaest@chromium.org [Tue, 25 Feb 2014 16:11:58 +0000 (16:11 +0000)]
Revert "Use stability to only conditionally flush information from the CheckMaps table."
R=ishell@chromium.org
Review URL: https://codereview.chromium.org/
180023002
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@19548
ce2b1a6d-e550-0410-aec6-
3dcde31c8c00
marja@chromium.org [Tue, 25 Feb 2014 15:55:14 +0000 (15:55 +0000)]
Follow up to r19538: Bump preparse data version number.
r19538 changes the preparse data format, so this is probably a good idea.
R=ulan@chromium.org
BUG=
Review URL: https://codereview.chromium.org/
179903002
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@19547
ce2b1a6d-e550-0410-aec6-
3dcde31c8c00
hpayer@chromium.org [Tue, 25 Feb 2014 15:47:33 +0000 (15:47 +0000)]
Re-evaluate marking bits of a descriptor array when it gets replaced.
BUG=340254
R=verwaest@chromium.org
Review URL: https://codereview.chromium.org/
179733004
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@19546
ce2b1a6d-e550-0410-aec6-
3dcde31c8c00
jkummerow@chromium.org [Tue, 25 Feb 2014 15:09:47 +0000 (15:09 +0000)]
Mark HCompareMap as having Tagged representation
BUG=chromium:346636
LOG=y
R=svenpanne@chromium.org
Review URL: https://codereview.chromium.org/
176923013
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@19545
ce2b1a6d-e550-0410-aec6-
3dcde31c8c00
dcarney@chromium.org [Tue, 25 Feb 2014 13:53:06 +0000 (13:53 +0000)]
Crash like chrome. Currently, most chrome crashes do not yield useful stack traces as v8 does a silent abort and chrome's crash symbolization does not kick in.
R=svenpanne@chromium.org
BUG=
Review URL: https://codereview.chromium.org/
179793004
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@19544
ce2b1a6d-e550-0410-aec6-
3dcde31c8c00
hpayer@chromium.org [Tue, 25 Feb 2014 12:33:55 +0000 (12:33 +0000)]
Prepare push to trunk. Now working on version 3.25.3.
R=danno@chromium.org
BUG=
Review URL: https://codereview.chromium.org/
179733002
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@19541
ce2b1a6d-e550-0410-aec6-
3dcde31c8c00
mvstanton@chromium.org [Tue, 25 Feb 2014 12:18:30 +0000 (12:18 +0000)]
Revert r19430, r19459:
"Reland "Allow ICs to be generated for own global proxy.""
Causing ClusterFuzz crash (issue 343928)
TBR=verwaest@chromium.org
Review URL: https://codereview.chromium.org/
179643003
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@19540
ce2b1a6d-e550-0410-aec6-
3dcde31c8c00
rossberg@chromium.org [Tue, 25 Feb 2014 12:01:34 +0000 (12:01 +0000)]
Fix crasher in Object.getOwnPropertySymbols
R=arv@chromium.org, mstarzinger@chromium.org
BUG=346141
LOG=Y
Review URL: https://codereview.chromium.org/
177883002
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@19539
ce2b1a6d-e550-0410-aec6-
3dcde31c8c00
marja@chromium.org [Tue, 25 Feb 2014 11:51:02 +0000 (11:51 +0000)]
Fix the bit massaging code in CompleteParserRecorder::WriteNumber.
The original code, added by
https://codereview.chromium.org/3384003/diff/7001/src/parser.cc 3.5 years ago,
failed to write numbers which contain a chunk of 7 zeroes in the middle. The
smallest such number is 2^14, so this is a problem if the source file to
preparse contains 16384 or more symbols (which happens in the wild).
This bug went unnoticed because the symbol data was not used by Parser (see
https://codereview.chromium.org/
172753002/ for starting to use it again) and
there were no tests.
R=ulan@chromium.org
BUG=346221
LOG=y
Review URL: https://codereview.chromium.org/
179433004
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@19538
ce2b1a6d-e550-0410-aec6-
3dcde31c8c00
ulan@chromium.org [Tue, 25 Feb 2014 10:52:15 +0000 (10:52 +0000)]
Revert r19455 "Load target types and handlers before IC computation."
It caused performance regression in dromaeo/jslib.
BUG=346149
LOG=Y
R=verwaest@chromium.org
Review URL: https://codereview.chromium.org/
179613002
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@19537
ce2b1a6d-e550-0410-aec6-
3dcde31c8c00
bmeurer@chromium.org [Tue, 25 Feb 2014 09:55:50 +0000 (09:55 +0000)]
Don't eliminate loads with incompatible types or representations.
BUG=346343
LOG=y
R=verwaest@chromium.org
Review URL: https://codereview.chromium.org/
179553002
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@19536
ce2b1a6d-e550-0410-aec6-
3dcde31c8c00
ishell@chromium.org [Tue, 25 Feb 2014 09:55:02 +0000 (09:55 +0000)]
Fix for a smi stores optimization on x64 with a regression test.
BUG=345715
LOG=N
R=verwaest@chromium.org
Review URL: https://codereview.chromium.org/
178833002
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@19535
ce2b1a6d-e550-0410-aec6-
3dcde31c8c00
jochen@chromium.org [Tue, 25 Feb 2014 09:27:05 +0000 (09:27 +0000)]
Check that after a weak callback, the handle is either dead or strong
BUG=346061
R=dcarney@chromium.org
LOG=y
Review URL: https://codereview.chromium.org/
177943002
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@19534
ce2b1a6d-e550-0410-aec6-
3dcde31c8c00
dcarney@chromium.org [Tue, 25 Feb 2014 09:15:05 +0000 (09:15 +0000)]
negative bounds checking on realm calls
R=rossberg@chromium.org
LOG=N
BUG=344285
Review URL: https://codereview.chromium.org/
169393002
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@19533
ce2b1a6d-e550-0410-aec6-
3dcde31c8c00
marja@chromium.org [Mon, 24 Feb 2014 17:48:09 +0000 (17:48 +0000)]
Lazy preparsing vs. lazy parsing fix.
Preparsing is always maximally lazy (every function that can be lazy is preparsed
lazily), but Parser has more complicated laziness logic.
If we're going to parse eagerly, and we have preparse data from lazy preparsing,
we're gonna have a bad time. The symbol stream won't contain symbols inside lazy
functions, and when the Parser parses them eagerly, it will consume symbols from
the symbol stream, and everything will go wrong.
This bug was hidden because the symbol cache was not used for real (see
https://codereview.chromium.org/
172753002/ ).
R=ulan@chromium.org
BUG=346207
LOG=Y
Review URL: https://codereview.chromium.org/
177973002
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@19532
ce2b1a6d-e550-0410-aec6-
3dcde31c8c00
jkummerow@chromium.org [Mon, 24 Feb 2014 13:15:31 +0000 (13:15 +0000)]
Fix optimistic BCE to back off after deopt
BUG=v8:3176
LOG=n
R=danno@chromium.org
Review URL: https://codereview.chromium.org/
177523002
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@19530
ce2b1a6d-e550-0410-aec6-
3dcde31c8c00
baptiste.afsa@arm.com [Fri, 21 Feb 2014 15:36:16 +0000 (15:36 +0000)]
A64: Replace a Subs by a Sub where flags don't need to be updated.
R=jochen@chromium.org
Review URL: https://codereview.chromium.org/
170553002
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@19529
ce2b1a6d-e550-0410-aec6-
3dcde31c8c00
baptiste.afsa@arm.com [Fri, 21 Feb 2014 15:34:39 +0000 (15:34 +0000)]
A64: Remove a couple of already addressed TODOs.
R=jochen@chromium.org
Review URL: https://codereview.chromium.org/
173773002
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@19528
ce2b1a6d-e550-0410-aec6-
3dcde31c8c00
m.m.capewell@googlemail.com [Fri, 21 Feb 2014 11:36:04 +0000 (11:36 +0000)]
A64: Tidy up register use in TaggedToI
Fix bug where input register was potentially corrupted, tidy up register use in
TruncateDoubleToI and rename TryInlineTruncateDoubleToI.
BUG=
R=ulan@chromium.org
Review URL: https://codereview.chromium.org/
173663002
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@19527
ce2b1a6d-e550-0410-aec6-
3dcde31c8c00
mstarzinger@chromium.org [Fri, 21 Feb 2014 11:19:32 +0000 (11:19 +0000)]
Initialize interface descriptor for ToNumberStub.
R=svenpanne@chromium.org
BUG=
Review URL: https://codereview.chromium.org/
170303003
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@19526
ce2b1a6d-e550-0410-aec6-
3dcde31c8c00
alexandre.rames@arm.com [Fri, 21 Feb 2014 09:32:57 +0000 (09:32 +0000)]
A64: Increase the margin for veneer checks.
BUG=v8:3168
LOG=N
R=ulan@chromium.org
Review URL: https://codereview.chromium.org/
171603008
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@19525
ce2b1a6d-e550-0410-aec6-
3dcde31c8c00
machenbach@chromium.org [Fri, 21 Feb 2014 08:10:06 +0000 (08:10 +0000)]
Prepare push to trunk. Now working on version 3.25.2.
R=yangguo@chromium.org
TBR=yangguo@chromium.org
Review URL: https://codereview.chromium.org/
174873002
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@19522
ce2b1a6d-e550-0410-aec6-
3dcde31c8c00
danno@chromium.org [Thu, 20 Feb 2014 21:55:45 +0000 (21:55 +0000)]
Remove bogus ASSERTs
R=verwaest@chromium.org
Review URL: https://codereview.chromium.org/
171533017
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@19521
ce2b1a6d-e550-0410-aec6-
3dcde31c8c00
plind44@gmail.com [Thu, 20 Feb 2014 21:03:26 +0000 (21:03 +0000)]
MIPS: Add flag for testing long branch mode.
TEST=
BUG=
R=jkummerow@chromium.org, plind44@gmail.com
Review URL: https://codereview.chromium.org/
173773003
Patch from Dusan Milosavljevic <Dusan.Milosavljevic@rt-rk.com>.
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@19520
ce2b1a6d-e550-0410-aec6-
3dcde31c8c00
jochen@chromium.org [Thu, 20 Feb 2014 19:32:27 +0000 (19:32 +0000)]
Ensure that the worker pool is running if we intend to use it
BUG=none
R=hpayer@chromium.org
LOG=n
Review URL: https://codereview.chromium.org/
170483002
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@19519
ce2b1a6d-e550-0410-aec6-
3dcde31c8c00
verwaest@chromium.org [Thu, 20 Feb 2014 17:57:22 +0000 (17:57 +0000)]
Use holder dictionary-mode to detect FAST or NORMAL
BUG=
R=ishell@chromium.org
Review URL: https://codereview.chromium.org/
165993004
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@19518
ce2b1a6d-e550-0410-aec6-
3dcde31c8c00
plind44@gmail.com [Thu, 20 Feb 2014 17:18:57 +0000 (17:18 +0000)]
MIPS: Fix clz implementation of the simulator.
BUG=
R=plind44@gmail.com
Review URL: https://codereview.chromium.org/
166273020
Patch from Balazs Kilvady <kilvadyb@homejinni.com>.
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@19517
ce2b1a6d-e550-0410-aec6-
3dcde31c8c00
alexandre.rames@arm.com [Thu, 20 Feb 2014 16:40:53 +0000 (16:40 +0000)]
A64: Improve the deoptimization helpers to generate fewer instructions.
R=jochen@chromium.org
Review URL: https://codereview.chromium.org/
166343004
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@19516
ce2b1a6d-e550-0410-aec6-
3dcde31c8c00
machenbach@chromium.org [Thu, 20 Feb 2014 16:39:41 +0000 (16:39 +0000)]
Refactoring: Extract low-level git from push and merge scripts.
- This adds a python layer on top of the low-level git calls to control parameter passing and return values.
- This also fixes a bug in FindLastTrunkPush that only shows up in manual mode when the last push versions are iterated.
- The order of some parameters changed in some git calls in the tests to be uniform.
BUG=
R=ulan@chromium.org
Review URL: https://codereview.chromium.org/
171423013
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@19515
ce2b1a6d-e550-0410-aec6-
3dcde31c8c00
jacob.bramley@arm.com [Thu, 20 Feb 2014 16:37:40 +0000 (16:37 +0000)]
Fix tools/cross_build_gcc.sh.
The cross_build_gcc.sh script didn't set LINK, so cross builds would
fail at the last step.
BUG=
R=ulan@chromium.org
Review URL: https://codereview.chromium.org/
170843011
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@19514
ce2b1a6d-e550-0410-aec6-
3dcde31c8c00
jacob.bramley@arm.com [Thu, 20 Feb 2014 16:36:53 +0000 (16:36 +0000)]
Remove the unused LoadInitialArrayMap.
BUG=
R=ulan@chromium.org
Review URL: https://codereview.chromium.org/
173883003
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@19513
ce2b1a6d-e550-0410-aec6-
3dcde31c8c00
verwaest@chromium.org [Thu, 20 Feb 2014 16:35:25 +0000 (16:35 +0000)]
Remove ASSERT related to major-key, it's not given that they match.
BUG=
R=ishell@chromium.org
Review URL: https://codereview.chromium.org/
166323015
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@19512
ce2b1a6d-e550-0410-aec6-
3dcde31c8c00
verwaest@chromium.org [Thu, 20 Feb 2014 16:11:48 +0000 (16:11 +0000)]
Don't turn objects with empty-string properties into fast-mode.
R=ishell@chromium.org
Review URL: https://codereview.chromium.org/
165743003
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@19511
ce2b1a6d-e550-0410-aec6-
3dcde31c8c00
verwaest@chromium.org [Thu, 20 Feb 2014 12:40:34 +0000 (12:40 +0000)]
Use ComputeHandlerFlags to find handlers, rather than manually encoding.
BUG=
R=ishell@chromium.org
Review URL: https://codereview.chromium.org/
170203003
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@19510
ce2b1a6d-e550-0410-aec6-
3dcde31c8c00
marja@chromium.org [Thu, 20 Feb 2014 11:35:37 +0000 (11:35 +0000)]
Re-enable Parser::symbol_cache_ (after a long time!)
The Parser never used the symbol stream produced by the PreParser for anything
useful, due to a bug introduced 3.5 years ago by
https://codereview.chromium.org/3356010/diff/7001/src/parser.cc.
The bug is that calling Initialize on symbol_cache_ doesn't change its
length. So the length remains 0, and the "if" in Parser::LookupSymbol is always
true, and Parser::LookupCachedSymbol is never called and symbol_cache_ never
filled.
This bug also masked a bug that the symbol stream produced by PreParser doesn't
match what Parser wants to consume. The repro case is the following:
var myo = {if: 4}; print(myo.if);
PreParser doesn't log a symbol for the first "if", but in the corresponding
place, Parser consumes one symbol from the symbol stream. Since the consumed
symbols were never really used, this mismatch went unnoticed.
This CL also fixes that bug.
BUG=
R=ulan@chromium.org
Review URL: https://codereview.chromium.org/
172753002
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@19505
ce2b1a6d-e550-0410-aec6-
3dcde31c8c00
baptiste.afsa@arm.com [Thu, 20 Feb 2014 11:22:33 +0000 (11:22 +0000)]
A64: Port recent ARM optimizations in LCodeGen::DoAccessArgumentsAt.
R=jochen@chromium.org
Review URL: https://codereview.chromium.org/
172333004
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@19504
ce2b1a6d-e550-0410-aec6-
3dcde31c8c00
m.m.capewell@googlemail.com [Thu, 20 Feb 2014 10:08:04 +0000 (10:08 +0000)]
A64: Fix int32 use in Lithium string functions
Assert register sizes in StringCharLoadGenerator, and fix char_code comparison
in DoStringCharFromCode.
BUG=
R=jochen@chromium.org
Review URL: https://codereview.chromium.org/
172483002
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@19503
ce2b1a6d-e550-0410-aec6-
3dcde31c8c00
machenbach@chromium.org [Thu, 20 Feb 2014 08:06:11 +0000 (08:06 +0000)]
Fix options in push-to-trunk script.
BUG=
TBR=ulan@chromium.org
Review URL: https://codereview.chromium.org/
173533002
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@19501
ce2b1a6d-e550-0410-aec6-
3dcde31c8c00
plind44@gmail.com [Wed, 19 Feb 2014 18:30:22 +0000 (18:30 +0000)]
MIPS: Fix performance regression on sunspider string-unpack-code.
Regression surfaced with r19009, but latent error was present since
r17767.
BUG=
R=dusan.milosavljevic@rt-rk.com
Review URL: https://codereview.chromium.org/
171793005
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@19500
ce2b1a6d-e550-0410-aec6-
3dcde31c8c00
plind44@gmail.com [Wed, 19 Feb 2014 18:16:06 +0000 (18:16 +0000)]
MIPS: Harmony: optimize Math.clz32.
Port r19487 (bd8c70f)
BUG=v8:2938
LOG=N
R=plind44@gmail.com
Review URL: https://codereview.chromium.org/
172533002
Patch from Balazs Kilvady <kilvadyb@homejinni.com>.
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@19499
ce2b1a6d-e550-0410-aec6-
3dcde31c8c00
danno@chromium.org [Wed, 19 Feb 2014 16:35:19 +0000 (16:35 +0000)]
Fix template copy constructor in zone_allocator
R=rossberg@chromium.org
Review URL: https://codereview.chromium.org/
165943005
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@19498
ce2b1a6d-e550-0410-aec6-
3dcde31c8c00
alexandre.rames@arm.com [Wed, 19 Feb 2014 16:13:09 +0000 (16:13 +0000)]
A64: Introduce 'branch types' that extend the architectural conditions.
The branch types include 'always' and 'never', and types like reg_zero (CBZ) and
reg_bit_clear (TBZ).
This will be used by incoming improvements to the code generated for
deoptimization exit points.
R=ulan@chromium.org
Review URL: https://codereview.chromium.org/
170783002
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@19497
ce2b1a6d-e550-0410-aec6-
3dcde31c8c00
jochen@chromium.org [Wed, 19 Feb 2014 15:20:15 +0000 (15:20 +0000)]
A64: Fix compilation with clang
The size_ member is only used in debug mode, so we should only define
it in debug mode.
BUG=none
R=rodolph.perfetta@arm.com, ulan@chromium.org
LOG=n
Review URL: https://codereview.chromium.org/
171583004
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@19495
ce2b1a6d-e550-0410-aec6-
3dcde31c8c00
machenbach@chromium.org [Wed, 19 Feb 2014 14:56:19 +0000 (14:56 +0000)]
Refactoring: Extract git checks in push and merge scripts.
This extracts the pattern "if call git fails: raise exception", which is spread all over the place. Now all calls to git are required to return gracefully and give a uniform exception message if they don't.
BUG=
R=ulan@chromium.org
Review URL: https://codereview.chromium.org/
166903012
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@19494
ce2b1a6d-e550-0410-aec6-
3dcde31c8c00
marja@chromium.org [Wed, 19 Feb 2014 14:53:14 +0000 (14:53 +0000)]
Re-enable fast/js/reserved-words-as-property.html.
Error message migration is done and Blink has updated the expected result.
R=yangguo@chromium.org, ulan@chromium.org
BUG=v8:3126
LOG=N
Review URL: https://codereview.chromium.org/
169353004
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@19493
ce2b1a6d-e550-0410-aec6-
3dcde31c8c00
marja@chromium.org [Wed, 19 Feb 2014 14:50:33 +0000 (14:50 +0000)]
Add comments about lazy parsing and lazy compilation.
Also rename is_lazily_compiled in (Pre)Parser; it really means "is lazily
parsed" and doesn't correspond to the lazy compilation decision.
R=svenpanne@chromium.org
BUG=
Review URL: https://codereview.chromium.org/
169223009
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@19492
ce2b1a6d-e550-0410-aec6-
3dcde31c8c00
jacob.bramley@arm.com [Wed, 19 Feb 2014 14:37:18 +0000 (14:37 +0000)]
A64: Fix r19474: Tidy up Push and Pop TODOs.
This fixes some snapshot=off, debug-mode regressions.
- Call CheckConstPool when entering InsturctionAccurateScopes. This
fixes a problem in PushMultipleTimes where 'count' is very high.
Each call to PushHelper starts an InstructionAccurateScope
immediately after the last one finishes, with no opportunity for the
constant pool to be generated.
- Temporarily disable AssertStackConsistency in PrepareForPush. This
assertion seems to push the code size too far, and several cctests
(intermittently) fail due to buffer size limitations. I would like
to renable this assertion later.
BUG=
R=ulan@chromium.org
Review URL: https://codereview.chromium.org/
172453002
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@19491
ce2b1a6d-e550-0410-aec6-
3dcde31c8c00
rossberg@chromium.org [Wed, 19 Feb 2014 14:19:42 +0000 (14:19 +0000)]
Upgrade Symbol implementation to match current ES6 behavior.
Refresh the implementation of Symbols to catch up with what the
specification now mandates:
* The global Symbol() function manufactures new Symbol values,
optionally with a string description attached.
* Invoking Symbol() as a constructor will now throw.
* ToString() over Symbol values still throws, and
Object.prototype.toString() stringifies like before.
* A Symbol value is wrapped in a Symbol object either implicitly if
it is the receiver, or explicitly done via Object(symbolValue) or
(new Object(symbolValue).)
* The Symbol.prototype.toString() method no longer throws on Symbol
wrapper objects (nor Symbol values.) Ditto for Symbol.prototype.valueOf().
* Symbol.prototype.toString() stringifies as "Symbol("<description>"),
valueOf() returns the wrapper's Symbol value.
* ToPrimitive() over Symbol wrapper objects now throws.
Overall, this provides a stricter separation between Symbol values and
wrapper objects than before, and the explicit fetching out of the
description (nee name) via the "name" property is no longer supported
(by the spec nor the implementation.)
Adjusted existing Symbol test files to fit current, adding some extra
tests for new/changed behavior.
LOG=N
R=arv@chromium.org, rossberg@chromium.org, arv, rossberg
BUG=v8:3053
Review URL: https://codereview.chromium.org/
118553003
Patch from Sigbjorn Finne <sigbjornf@opera.com>.
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@19490
ce2b1a6d-e550-0410-aec6-
3dcde31c8c00
ulan@chromium.org [Wed, 19 Feb 2014 14:03:48 +0000 (14:03 +0000)]
Clean up weak objects in optimized code.
This prepares for weak objects in IC stubs.
R=svenpanne@chromium.org
Review URL: https://codereview.chromium.org/
172233003
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@19489
ce2b1a6d-e550-0410-aec6-
3dcde31c8c00
mvstanton@chromium.org [Wed, 19 Feb 2014 13:55:25 +0000 (13:55 +0000)]
Revert "Second attempt at introducing a premonomorphic state in the call"
This reverts commits r19463 and r19457 (includes MIPS port), there was a
Sunspider perf issue and on reflection we can achieve the necessary
result in a new way.
TBR=verwaest@chromium.org
Review URL: https://codereview.chromium.org/
172383003
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@19488
ce2b1a6d-e550-0410-aec6-
3dcde31c8c00
yangguo@chromium.org [Wed, 19 Feb 2014 13:51:49 +0000 (13:51 +0000)]
Harmony: optimize Math.clz32.
R=svenpanne@chromium.org
BUG=v8:2938
LOG=N
Review URL: https://codereview.chromium.org/
172133003
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@19487
ce2b1a6d-e550-0410-aec6-
3dcde31c8c00
yangguo@chromium.org [Wed, 19 Feb 2014 13:49:59 +0000 (13:49 +0000)]
Harmony: implement Math.cbrt, Math.expm1 and Math.log1p.
BUG=v8:2938
LOG=N
R=jarin@chromium.org
Review URL: https://codereview.chromium.org/
163563003
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@19486
ce2b1a6d-e550-0410-aec6-
3dcde31c8c00
machenbach@chromium.org [Wed, 19 Feb 2014 13:44:17 +0000 (13:44 +0000)]
Prepare push to trunk. Now working on version 3.25.1.
R=danno@chromium.org
TBR=danno@chromium.org
Review URL: https://codereview.chromium.org/
170283011
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@19483
ce2b1a6d-e550-0410-aec6-
3dcde31c8c00
machenbach@chromium.org [Wed, 19 Feb 2014 13:40:30 +0000 (13:40 +0000)]
Retrieve bleeding edge push revision from trunk commit message.
This is part of moving towards an lkgr-push script and prepares the deprecation of the prepare push commit.
BUG=
R=jkummerow@chromium.org
Review URL: https://codereview.chromium.org/
169843002
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@19482
ce2b1a6d-e550-0410-aec6-
3dcde31c8c00
ishell@chromium.org [Wed, 19 Feb 2014 12:34:50 +0000 (12:34 +0000)]
Bugfix in check elimination with a regression test.
R=verwaest@chromium.org
Review URL: https://codereview.chromium.org/
172173003
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@19481
ce2b1a6d-e550-0410-aec6-
3dcde31c8c00
jkummerow@chromium.org [Wed, 19 Feb 2014 12:30:10 +0000 (12:30 +0000)]
Fix cornercase in r19475
R=svenpanne@chromium.org
Review URL: https://codereview.chromium.org/
169353003
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@19480
ce2b1a6d-e550-0410-aec6-
3dcde31c8c00
rossberg@chromium.org [Wed, 19 Feb 2014 11:59:05 +0000 (11:59 +0000)]
ES6: Tighten up Object.prototype.__proto__
The spec requires that we throw under certain conditions.
BUG=v8:3064
LOG=y
R=rossberg@chromium.org
Review URL: https://codereview.chromium.org/
103853006
Patch from Erik Arvidsson <arv@chromium.org>.
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@19479
ce2b1a6d-e550-0410-aec6-
3dcde31c8c00
machenbach@chromium.org [Wed, 19 Feb 2014 11:56:48 +0000 (11:56 +0000)]
Refactor persisting state in push and merge scripts.
- The backed state dict is now persisted and restored in the step template as a json file
- All explicit persist/restore calls are removed
- Added testing an unexpected script failure + restart with state recovery to the merge-to-branch test
- This CL is not changing external behavior of the scripts
BUG=
R=ulan@chromium.org
Review URL: https://codereview.chromium.org/
170583002
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@19478
ce2b1a6d-e550-0410-aec6-
3dcde31c8c00
rossberg@chromium.org [Wed, 19 Feb 2014 10:52:06 +0000 (10:52 +0000)]
Narrows predicate for type bounds
R=danno@chromium.org
BUG=
Review URL: https://codereview.chromium.org/
170943005
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@19476
ce2b1a6d-e550-0410-aec6-
3dcde31c8c00
jkummerow@chromium.org [Wed, 19 Feb 2014 10:30:39 +0000 (10:30 +0000)]
Fix Hydrogen bounds check elimination
When combining bounds checks, they must all be moved before the first load/store
that they are guarding.
BUG=chromium:344186
LOG=y
R=svenpanne@chromium.org
Review URL: https://codereview.chromium.org/
172093002
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@19475
ce2b1a6d-e550-0410-aec6-
3dcde31c8c00
jacob.bramley@arm.com [Wed, 19 Feb 2014 09:43:45 +0000 (09:43 +0000)]
A64: Tidy up Push and Pop TODOs.
This addresses several TODOs:
- Push and Pop requests can be queued up so that arrays of Registers
can be pushed efficiently, with just one PrepareForPush/Pop.
- PushMultipleTimes now takes an Operand. This allows variable-length
arguments arrays to be initialized, for example.
- A NoUseRealAbortsScope has been added to Abort so that
AssertStackConsistency can be called from PrepareForPush without
introducing infinite recursion.
BUG=
R=rmcilroy@chromium.org, ulan@chromium.org
Review URL: https://codereview.chromium.org/
170623002
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@19474
ce2b1a6d-e550-0410-aec6-
3dcde31c8c00
baptiste.afsa@arm.com [Wed, 19 Feb 2014 09:38:45 +0000 (09:38 +0000)]
A64: Remove early_exit unused mechanism in CompareMap.
R=jochen@chromium.org, ulan@chromium.org
Review URL: https://codereview.chromium.org/
169733003
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@19473
ce2b1a6d-e550-0410-aec6-
3dcde31c8c00
baptiste.afsa@arm.com [Wed, 19 Feb 2014 09:37:07 +0000 (09:37 +0000)]
A64: Replace a Cmp/Branch sequence by a conditional compare.
R=jochen@chromium.org, ulan@chromium.org
Review URL: https://codereview.chromium.org/
169403003
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@19472
ce2b1a6d-e550-0410-aec6-
3dcde31c8c00
ulan@chromium.org [Wed, 19 Feb 2014 09:24:44 +0000 (09:24 +0000)]
Do not emit receiver map in CheckPrototypes.
BUG=
R=verwaest@chromium.org
Review URL: https://codereview.chromium.org/
170613002
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@19471
ce2b1a6d-e550-0410-aec6-
3dcde31c8c00
jkummerow@chromium.org [Wed, 19 Feb 2014 08:56:16 +0000 (08:56 +0000)]
Makefile: don't force -Dv8_optimized_debug=0 unnecessarily
R=machenbach@chromium.org
Review URL: https://codereview.chromium.org/
170243003
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@19470
ce2b1a6d-e550-0410-aec6-
3dcde31c8c00
marja@chromium.org [Wed, 19 Feb 2014 08:56:11 +0000 (08:56 +0000)]
(Pre)Parser: Move ParseExpression and ParseArrayLiteral to ParserBase.
Notes:
- The functions already did the same thing -> no changes in logic.
- One less glue function needed now.
R=ulan@chromium.org
BUG=v8:3126
LOG=N
Review URL: https://codereview.chromium.org/
169853002
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@19469
ce2b1a6d-e550-0410-aec6-
3dcde31c8c00
jkummerow@chromium.org [Wed, 19 Feb 2014 08:28:14 +0000 (08:28 +0000)]
Fix zone_allocator to support comparison
R=danno@chromium.org
Review URL: https://codereview.chromium.org/
171713004
Patch from Daniel Clifford <danno@chromium.org>.
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@19468
ce2b1a6d-e550-0410-aec6-
3dcde31c8c00
machenbach@chromium.org [Wed, 19 Feb 2014 08:25:30 +0000 (08:25 +0000)]
Fast-forward version number on bleeding_edge to 3.25.0
BUG=
R=danno@chromium.org
Review URL: https://codereview.chromium.org/
170843008
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@19467
ce2b1a6d-e550-0410-aec6-
3dcde31c8c00
machenbach@chromium.org [Wed, 19 Feb 2014 01:05:18 +0000 (01:05 +0000)]
Prepare push to trunk. Now working on version 3.24.41.
R=jkummerow@chromium.org
TBR=jkummerow@chromium.org
Review URL: https://codereview.chromium.org/
171783002
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@19464
ce2b1a6d-e550-0410-aec6-
3dcde31c8c00
plind44@gmail.com [Tue, 18 Feb 2014 19:29:56 +0000 (19:29 +0000)]
MIPS: Second attempt at introducing a premonomorphic state in the call target caches.
Port: r19457 (9d8d5f3)
Original commit message:
This time we don't go through the premonomorphic state for
the Array call target caches to avoid losing information from
allocation sites that aren't only used once, but where the
resulting array is used heavily.
Patch from Kasper Lund <kasperl@chromium.org>.
BUG=
R=plind44@gmail.com
Review URL: https://codereview.chromium.org/
170903002
Patch from Balazs Kilvady <kilvadyb@homejinni.com>.
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@19463
ce2b1a6d-e550-0410-aec6-
3dcde31c8c00
m.m.capewell@googlemail.com [Tue, 18 Feb 2014 17:42:49 +0000 (17:42 +0000)]
A64: Fix WrapReceiver corrupting receiver register
BUG=
R=ulan@chromium.org
Review URL: https://codereview.chromium.org/
170433006
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@19462
ce2b1a6d-e550-0410-aec6-
3dcde31c8c00
alexandre.rames@arm.com [Tue, 18 Feb 2014 17:10:04 +0000 (17:10 +0000)]
A64: Let the Simulator trap BLR XZR instructions.
This instruction is used as a guard for the constant pool.
R=ulan@chromium.org
Review URL: https://codereview.chromium.org/
170673003
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@19461
ce2b1a6d-e550-0410-aec6-
3dcde31c8c00
jarin@chromium.org [Tue, 18 Feb 2014 16:34:52 +0000 (16:34 +0000)]
Add filler at the new space top when forcing scavenge.
We only seem to force scavenge in our cctest test suite, so this is
expected to fix some flakiness in our tests, but it will not
improve stability of v8 itself.
R=hpayer@chromium.org
BUG=
Review URL: https://codereview.chromium.org/
167423004
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@19460
ce2b1a6d-e550-0410-aec6-
3dcde31c8c00
plind44@gmail.com [Tue, 18 Feb 2014 16:14:14 +0000 (16:14 +0000)]
MIPS: Reland "Allow ICs to be generated for own global proxy."
Port r19430 (70bb668)
BUG=
R=plind44@gmail.com
Review URL: https://codereview.chromium.org/
170343004
Patch from Balazs Kilvady <kilvadyb@homejinni.com>.
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@19459
ce2b1a6d-e550-0410-aec6-
3dcde31c8c00
alph@chromium.org [Tue, 18 Feb 2014 15:57:44 +0000 (15:57 +0000)]
DevTools: Drop kSinTable dependency off the heap profiler ArrayBuffer backing_store test
LOG=N
R=dslomov@chromium.org, yurys@chromium.org
Review URL: https://codereview.chromium.org/
170253008
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@19458
ce2b1a6d-e550-0410-aec6-
3dcde31c8c00
mvstanton@chromium.org [Tue, 18 Feb 2014 15:33:34 +0000 (15:33 +0000)]
Second attempt at introducing a premonomorphic state in the call
target caches.
This time we don't go through the premonomorphic state for
the Array call target caches to avoid losing information from
allocation sites that aren't only used once, but where the
resulting array is used heavily.
R=mvstanton@chromium.org
Review URL: https://codereview.chromium.org/
169683003
Patch from Kasper Lund <kasperl@chromium.org>.
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@19457
ce2b1a6d-e550-0410-aec6-
3dcde31c8c00
alexandre.rames@arm.com [Tue, 18 Feb 2014 15:14:23 +0000 (15:14 +0000)]
A64: Minor code generation improvement: only load the object map if needed.
R=ulan@chromium.org
Review URL: https://codereview.chromium.org/
170503004
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@19456
ce2b1a6d-e550-0410-aec6-
3dcde31c8c00
ulan@chromium.org [Tue, 18 Feb 2014 15:12:58 +0000 (15:12 +0000)]
Load target types and handlers before IC computation.
BUG=
R=verwaest@chromium.org
Review URL: https://codereview.chromium.org/
170563002
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@19455
ce2b1a6d-e550-0410-aec6-
3dcde31c8c00
alph@chromium.org [Tue, 18 Feb 2014 14:21:09 +0000 (14:21 +0000)]
Fix compile on Windows
TBR=yurys@chromium.org,dslomov@chromium.org
LOG=N
Review URL: https://codereview.chromium.org/
170543002
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@19454
ce2b1a6d-e550-0410-aec6-
3dcde31c8c00
machenbach@chromium.org [Tue, 18 Feb 2014 14:17:08 +0000 (14:17 +0000)]
Fix merge-to-branch options.
BUG=
TBR=ulan@chromium.org
Review URL: https://codereview.chromium.org/
170443003
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@19453
ce2b1a6d-e550-0410-aec6-
3dcde31c8c00
machenbach@chromium.org [Tue, 18 Feb 2014 14:05:59 +0000 (14:05 +0000)]
Fix merge-to-branch python port.
This fixes a forgotten parameter when calling the script's toplevel method and adds the same usage message as in the bash script.
BUG=
TBR=ulan@chromium.org
Review URL: https://codereview.chromium.org/
164373015
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@19450
ce2b1a6d-e550-0410-aec6-
3dcde31c8c00
alph@chromium.org [Tue, 18 Feb 2014 13:56:07 +0000 (13:56 +0000)]
Fix compile error.
LOG=N
TBR=yurys@chromium.org,dslomov@chromium.org
Review URL: https://codereview.chromium.org/
166193005
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@19449
ce2b1a6d-e550-0410-aec6-
3dcde31c8c00
machenbach@chromium.org [Tue, 18 Feb 2014 13:51:46 +0000 (13:51 +0000)]
Fix merge-to-branch imports.
BUG=
TBR=ulan@chromium.org
Review URL: https://codereview.chromium.org/
170513002
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@19448
ce2b1a6d-e550-0410-aec6-
3dcde31c8c00
jacob.bramley@arm.com [Tue, 18 Feb 2014 13:51:24 +0000 (13:51 +0000)]
A64: Fix compiler warning in r19444.
BUG=
R=jochen@chromium.org
Review URL: https://codereview.chromium.org/
167463004
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@19447
ce2b1a6d-e550-0410-aec6-
3dcde31c8c00
machenbach@chromium.org [Tue, 18 Feb 2014 13:47:56 +0000 (13:47 +0000)]
Make merge-to-branch python port executable
BUG=
TBR=ulan@chromium.org
Review URL: https://codereview.chromium.org/
170493002
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@19446
ce2b1a6d-e550-0410-aec6-
3dcde31c8c00
alph@chromium.org [Tue, 18 Feb 2014 13:22:07 +0000 (13:22 +0000)]
Allow self_size to be larger than 2GB in heap snapshots.
LOG=N
R=dslomov@chromium.org, yurys@chromium.org
Review URL: https://codereview.chromium.org/
166383002
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@19445
ce2b1a6d-e550-0410-aec6-
3dcde31c8c00
alexandre.rames@arm.com [Tue, 18 Feb 2014 13:15:32 +0000 (13:15 +0000)]
A64: Let the MacroAssembler resolve branches to distant targets.
Code generation would fail when assembling a branch to a label that is bound
outside the immediate range of the instruction. A64 is sensitive to this, as the
various branching instructions have different ranges, going down to +-32KB for
TBZ/TBNZ. The MacroAssembler is augmented to handle branches to targets that
may exceed the immediate range of instructions.
When branching backward to a label exceeding the instruction range, the
MacroAssembler can simply tweak the generated code to use an unconditional
branch with a longer range. For example instead of
B(cond, &label);
the MacroAssembler can generate:
b(InvertCondition(cond), &done);
b(&label);
bind(&done);
Since the target is not known when the branch is emitted, forward branches uses
a different mechanism. The MacroAssembler keeps track of forward branches to
unbound labels. When the code generation approaches the end of the range of a
branch, a veneer is generated for the branch.
BUG=v8:3148
LOG=Y
R=ulan@chromium.org
Review URL: https://codereview.chromium.org/
169893002
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@19444
ce2b1a6d-e550-0410-aec6-
3dcde31c8c00
machenbach@chromium.org [Tue, 18 Feb 2014 13:09:14 +0000 (13:09 +0000)]
Add merge-to-branch python port.
- To ease a line-by-line review, the script is intentionally close to the former bash version
- Disambiguate the existing "-r" option for reviewer in the other scripts
- The options design will be refactored in a follow up CL
TEST=python -m unittest test_scripts.ScriptTest.testMergeToBranch
R=ulan@chromium.org
Review URL: https://codereview.chromium.org/
163183004
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@19443
ce2b1a6d-e550-0410-aec6-
3dcde31c8c00
jacob.bramley@arm.com [Tue, 18 Feb 2014 13:03:24 +0000 (13:03 +0000)]
Pass a BailoutReason to Runtime::kAbort.
BUG=
R=rmcilroy@chromium.org, ulan@chromium.org
Review URL: https://codereview.chromium.org/
168903004
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@19442
ce2b1a6d-e550-0410-aec6-
3dcde31c8c00
dcarney@chromium.org [Tue, 18 Feb 2014 12:38:12 +0000 (12:38 +0000)]
templatize operand constructors
R=jochen@chromium.org
BUG=
Review URL: https://codereview.chromium.org/
170403003
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@19441
ce2b1a6d-e550-0410-aec6-
3dcde31c8c00
verwaest@chromium.org [Tue, 18 Feb 2014 12:19:32 +0000 (12:19 +0000)]
Directly store the transition target on LookupResult in TransitionResult.
BUG=chromium:343964
LOG=N
R=jkummerow@chromium.org
Review URL: https://codereview.chromium.org/
170343003
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@19440
ce2b1a6d-e550-0410-aec6-
3dcde31c8c00
jochen@chromium.org [Tue, 18 Feb 2014 11:56:55 +0000 (11:56 +0000)]
A64: Fix register usage in LCodeGen::ArgumentsLength
The result should be just stored in a W register
BUG=none
R=m.m.capewell@googlemail.com, ulan@chromium.org
LOG=n
Review URL: https://codereview.chromium.org/
170363002
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@19439
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bmeurer@chromium.org [Tue, 18 Feb 2014 11:30:51 +0000 (11:30 +0000)]
Consistent use of const for LookupResult.
R=svenpanne@chromium.org
Review URL: https://codereview.chromium.org/
170073003
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@19438
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yurys@chromium.org [Tue, 18 Feb 2014 11:30:38 +0000 (11:30 +0000)]
Create HandleScope before calling GetScriptLineNumber
Otherwise we may crash.
BUG=None
LOG=N
R=alph@chromium.org, hpayer@chromium.org
Review URL: https://codereview.chromium.org/
169773002
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@19437
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yangguo@chromium.org [Tue, 18 Feb 2014 10:50:22 +0000 (10:50 +0000)]
Update LICENSE date.
R=jkummerow@chromium.org, danno@chromium.org
Review URL: https://codereview.chromium.org/
144663005
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@19436
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yangguo@chromium.org [Tue, 18 Feb 2014 10:49:35 +0000 (10:49 +0000)]
Harmony: implement Math.clz32
R=dslomov@chromium.org, svenpanne@chromium.org
BUG=v8:2938
LOG=N
Review URL: https://codereview.chromium.org/
169783002
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@19435
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svenpanne@chromium.org [Tue, 18 Feb 2014 10:45:27 +0000 (10:45 +0000)]
Fixed and improved code for integral division. Fixed and extended tests.
Arithmetic right shifting is *not* division in two's complement
representation, only in one's complement. So we convert to one's
complement, shift, and go back to two's complement. By permutating the
last steps, one can get efficient branch-free code. This insight comes
from the paleozoic era of computer science, see the paper from 1976:
Guy Lewis Steele Jr.: "Arithmetic Shifting Considered Harmful"
ftp://publications.ai.mit.edu/ai-publications/pdf/AIM-378.pdf
This results in better and more correct code than our previous
"neg/shift/neg" dance.
LOG=y
BUG=v8:3151
R=bmeurer@chromium.org
Review URL: https://codereview.chromium.org/
166793002
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@19434
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