AuroraMiddleware/v8
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271 Commits

Author SHA1 Message Date
mstarzinger@chromium.org
9734f236a3 Revert "Remove workaround for successors on end block from scheduler." 
TBR=titzer@chromium.org

Review URL: https://codereview.chromium.org/705043002

Cr-Commit-Position: refs/heads/master@{#25194}
git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@25194 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2014-11-06 13:12:16 +00:00
titzer@chromium.org
b309f3d208 [turbofan] (reland) Compute tighter ranges for modulus in Typer. 
R=jarin@chromium.org
BUG=

Review URL: https://codereview.chromium.org/694703004

Cr-Commit-Position: refs/heads/master@{#25193}
git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@25193 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2014-11-06 13:10:49 +00:00
mstarzinger@chromium.org
f9575cef57 Remove workaround for successors on end block from scheduler. 
R=titzer@chromium.org
TEST=cctest/test-scheduler/RPOLoop

Review URL: https://codereview.chromium.org/708763002

Cr-Commit-Position: refs/heads/master@{#25188}
git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@25188 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2014-11-06 12:31:52 +00:00
mstarzinger@chromium.org
361d7b0f0e Avoid redundant work in scheduler loop header/depth calculation. 
R=jarin@chromium.org

TEST=cctest/test-scheduler/LoopedFloatingDiamond2

Review URL: https://codereview.chromium.org/702683002

Cr-Commit-Position: refs/heads/master@{#25181}
git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@25181 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2014-11-06 09:15:42 +00:00
bmeurer@chromium.org
8798c410e1 [turbofan] Turn various diamonds into selects. 
TEST=cctest/test-changes-lowering,mjsunit/asm,unittests
R=jarin@chromium.org

Review URL: https://codereview.chromium.org/704463004

Cr-Commit-Position: refs/heads/master@{#25180}
git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@25180 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2014-11-06 09:10:32 +00:00
dcarney@chromium.org
57b42dc51f [turbofan] extend register allocator testing with control flow 
R=bmeurer@chromium.org, jarin@chromium.org

BUG=

Review URL: https://codereview.chromium.org/699083003

Cr-Commit-Position: refs/heads/master@{#25178}
git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@25178 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2014-11-06 08:28:45 +00:00
titzer@chromium.org
0f46c9b46a Revert "[turbofan] Compute tighter ranges for modulus in Typer." 
This reverts commit 482586747ca6bc0c94cc23f916fd190931d3a836.

TBR=jarin@chromium.org
BUG=

Review URL: https://codereview.chromium.org/702893002

Cr-Commit-Position: refs/heads/master@{#25164}
git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@25164 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2014-11-05 15:19:45 +00:00
titzer@chromium.org
b2800d7d87 [turbofan] Compute tighter ranges for modulus in Typer. 
R=jarin@chromium.org
BUG=

Review URL: https://codereview.chromium.org/689133003

Cr-Commit-Position: refs/heads/master@{#25162}
git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@25162 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2014-11-05 14:57:15 +00:00
bmeurer@chromium.org
0c1a545a93 [turbofan] Propagate "deferredness" to dominated basic blocks. 
TEST=cctest/test-scheduler
R=mstarzinger@chromium.org

Review URL: https://codereview.chromium.org/686273005

Cr-Commit-Position: refs/heads/master@{#25141}
git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@25141 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2014-11-05 10:44:12 +00:00
mstarzinger@chromium.org
b0aa81f30d Make special RPO computation iterative during scheduling. 
This contains the following changes squashed together:
- Switch BasicBlock::loop_end to be a basic block instead of an RPO.
- Switch ScheduleLate to use dominator depth instead of RPO.
- Switch ScheduleEarly to use dominator depth instead of RPO.
- Push out absolute RPO ordering everywhere else in the scheduler.
- Keep linked list of blocks in RPO order while scheduling.
- Switch from RPO number to depth for dominator calculation.

R=jarin@chromium.org

Review URL: https://codereview.chromium.org/696363002

Cr-Commit-Position: refs/heads/master@{#25138}
git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@25138 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2014-11-05 10:10:54 +00:00
titzer@chromium.org
faa71f966a Introduce Diamond, a helper for building diamond-shaped control patterns. 
R=mstarzinger@chromium.org, bmeurer@chromium.org
BUG=

Review URL: https://codereview.chromium.org/694063005

Cr-Commit-Position: refs/heads/master@{#25110}
git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@25110 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2014-11-04 14:37:44 +00:00
dcarney@chromium.org
7cb25f5020 [turbofan] add RegisterConfiguration to decouple arch specific register layouts from compiler 
R=bmeurer@chromium.org

BUG=

Review URL: https://codereview.chromium.org/694313002

Cr-Commit-Position: refs/heads/master@{#25097}
git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@25097 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2014-11-04 09:22:32 +00:00
titzer@chromium.org
5bba6b20e6 Make visualizer robust to graphs with NULL inputs. 
R=mstarzinger@chromium.org, jarin@chromium.org
BUG=

Review URL: https://codereview.chromium.org/652263002

Cr-Commit-Position: refs/heads/master@{#25084}
git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@25084 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2014-11-03 17:42:17 +00:00
dcarney@chromium.org
273a9ad200 build fix after 25072 
TBR=bmeurer@chromium.org

BUG=

Review URL: https://codereview.chromium.org/688323005

Cr-Commit-Position: refs/heads/master@{#25073}
git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@25073 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2014-11-03 13:55:44 +00:00
dcarney@chromium.org
e17194ba52 build fix after r25071 
TBR=bmeurer@chromium.org

BUG=

Review URL: https://codereview.chromium.org/684523003

Cr-Commit-Position: refs/heads/master@{#25072}
git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@25072 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2014-11-03 13:42:13 +00:00
dcarney@chromium.org
0d1cdebad2 [turbofan] initial framework for unittesting of register allocator 
BUG=
R=bmeurer@chromium.org

Review URL: https://codereview.chromium.org/683133005

Cr-Commit-Position: refs/heads/master@{#25071}
git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@25071 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2014-11-03 13:27:23 +00:00
mstarzinger@chromium.org
c63deb9b56 Make generic algorithm less generic. 
R=jarin@chromium.org

Review URL: https://codereview.chromium.org/701473002

Cr-Commit-Position: refs/heads/master@{#25064}
git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@25064 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2014-11-03 10:31:11 +00:00
titzer@chromium.org
c62bb3e2eb Now with more checkings! Skip the CallFunctionStub when the callee function can be statically determined. 
R=mstarzinger@chromium.org
BUG=

Review URL: https://codereview.chromium.org/696223002

Cr-Commit-Position: refs/heads/master@{#25062}
git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@25062 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2014-11-03 10:22:44 +00:00
bmeurer@chromium.org
498920f91c [turbofan] Also optimize unsigned division by constant. 
TEST=cctest,mjsunit,unittests
R=jarin@chromium.org

Review URL: https://codereview.chromium.org/697663003

Cr-Commit-Position: refs/heads/master@{#25061}
git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@25061 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2014-11-03 10:05:46 +00:00
jarin@chromium.org
4a9579feeb [turbofan] Avoid unnecessary (u)int32<->float64 changes in simplified lowering. 
BUG=
R=bmeurer@chromium.org, titzer@chromium.org

Review URL: https://codereview.chromium.org/683873002

Cr-Commit-Position: refs/heads/master@{#25045}
git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@25045 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2014-10-31 19:53:48 +00:00
jarin@chromium.org
6935e0131c Revert "Skip the CallFunctionStub when the callee function can be statically determined." 
This reverts commit 9845dfadd2 (r25042) for failing tests.

TBR=titzer@chromium.org
BUG=

Review URL: https://codereview.chromium.org/693103004

Cr-Commit-Position: refs/heads/master@{#25044}
git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@25044 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2014-10-31 19:06:18 +00:00
titzer@chromium.org
9845dfadd2 Skip the CallFunctionStub when the callee function can be statically determined. 
R=mstarzinger@chromium.org
BUG=

Review URL: https://codereview.chromium.org/694773002

Cr-Commit-Position: refs/heads/master@{#25042}
git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@25042 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2014-10-31 16:36:13 +00:00
bmeurer@chromium.org
28b683630e [turbofan] Lower NumberModulus to Uint32Mod if both inputs are Unsigned32. 
TEST=cctest/test-simplified-lowering
R=dcarney@chromium.org

Review URL: https://codereview.chromium.org/685993003

Cr-Commit-Position: refs/heads/master@{#25025}
git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@25025 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2014-10-31 07:59:18 +00:00
bmeurer@chromium.org
948ce2141e [turbofan] First step towards correctified 64-bit addressing. 
Also remove the LEA matching from x64, since it was never really
effective. We'll optimize that once we're correct.

TEST=cctest,unittests
R=dcarney@chromium.org

Review URL: https://codereview.chromium.org/652363006

Cr-Commit-Position: refs/heads/master@{#25024}
git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@25024 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2014-10-31 06:41:41 +00:00
sigurds@chromium.org
75ac43928b Add floor, ceil, round (truncate) instructions for ia32, x64 (if SSE4.1) and 
add floor, ceil, round (truncate and away from zero) for arm64.

R=bmeurer@chromium.org, dcarney@chromium.org, mstarzinger@chromium.org, rodolph.perfetta@arm.com
TEST=test/mjsunit/asm/math-floor.js,test/mjsunit/asm/math-ceil.js,test/unittest/compiler/js-builtin-reducer-unittest.cc

Review URL: https://codereview.chromium.org/677433002

Cr-Commit-Position: refs/heads/master@{#25018}
git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@25018 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2014-10-30 14:16:15 +00:00
dcarney@chromium.org
ee9de33075 [turbofan] move Node to vreg mapping to InstructionSelector 
BUG=
R=bmeurer@chromium.org

Review URL: https://codereview.chromium.org/683933004

Cr-Commit-Position: refs/heads/master@{#25010}
git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@25010 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2014-10-30 09:50:41 +00:00
dcarney@chromium.org
7f94583f79 [turbofan] add configuration parameters for register allocator 
T=jarin@chromium.org

BUG=
R=jarin@chromium.org

Review URL: https://codereview.chromium.org/688633002

Cr-Commit-Position: refs/heads/master@{#25008}
git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@25008 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2014-10-30 09:01:47 +00:00
jarin@chromium.org
5d54e89ad6 [turbofan] Fix input count in Uint32Mod/Div reduction. 
BUG=
R=bmeurer@chromium.org

Review URL: https://codereview.chromium.org/684193002

Cr-Commit-Position: refs/heads/master@{#24997}
git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@24997 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2014-10-29 21:07:47 +00:00
titzer@chromium.org
5c25fdb65e Inline trivial OperatorProperties methods. 
R=mstarzinger@chromium.org
BUG=

Review URL: https://codereview.chromium.org/686213002

Cr-Commit-Position: refs/heads/master@{#24995}
git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@24995 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2014-10-29 18:47:14 +00:00
titzer@chromium.org
2a57f036b2 Run ControlReducer early after graph building, then again later. 
The justification for doing this is to reduce the size of the graph and
therefore speedup later phases of compilation. The control reducer also
obviates the need to run the PhiReducer, since it subsumes it.

R=mstarzinger@chromium.org
BUG=

Review URL: https://codereview.chromium.org/681263004

Cr-Commit-Position: refs/heads/master@{#24986}
git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@24986 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2014-10-29 15:27:58 +00:00
titzer@chromium.org
6c6a71b3f7 Move input/output counts directly into Operators, simplying OperatorProperties. 
This is a first step to refactoring OperatorProperties out of existence.
The next step is to inline OperatorProperties::GetXXXCount into the callers.

R=rossberg@chromium.org
BUG=

Review URL: https://codereview.chromium.org/680313003

Cr-Commit-Position: refs/heads/master@{#24983}
git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@24983 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2014-10-29 14:41:18 +00:00
dcarney@chromium.org
60909d1eaf [turbofan] cleanup register allocator interface a little 
BUG=
R=jarin@chromium.org

Review URL: https://codereview.chromium.org/671043004

Cr-Commit-Position: refs/heads/master@{#24978}
git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@24978 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2014-10-29 12:35:16 +00:00
titzer@chromium.org
1ddcb4b16d Fix windows build. 
TBR=ishell@chromium.org
BUG=

Review URL: https://codereview.chromium.org/669663003

Cr-Commit-Position: refs/heads/master@{#24958}
git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@24958 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2014-10-28 17:54:57 +00:00
titzer@chromium.org
90a7f07489 Implement loop variable assignment analysis. 
This analysis computes the set of variables that are assigned in each loop. This is useful to avoid creating redundant loop phis when building an SSA graph, which just waste memory and require analysis to get rid of.

This CL implements an AST walk for the analysis and plugs the result into the TurboFan graph builder. I left this analysis under a flag for A/B testing and until sufficient unit tests can be developed.

R=danno@chromium.org, mstarzinger@chromium.org
BUG=

Review URL: https://codereview.chromium.org/656123005

Cr-Commit-Position: refs/heads/master@{#24957}
git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@24957 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2014-10-28 17:30:14 +00:00
bmeurer@chromium.org
81aaeb476d [turbofan] Complete support for integer division/modulus in simplified lowering. 
Also add backend flags that tell whether integer division/modulus is
generally safe, i.e. does not trap on overflow or divide by zero.

TEST=unittests
R=dcarney@chromium.org

Review URL: https://codereview.chromium.org/681133004

Cr-Commit-Position: refs/heads/master@{#24942}
git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@24942 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2014-10-28 13:56:46 +00:00
wingo@igalia.com
d518d3bce7 Move AST node counting to post-pass 
R=mstarzinger@chromium.org, svenpanne@chromium.org
BUG=

Review URL: https://codereview.chromium.org/683023002

Cr-Commit-Position: refs/heads/master@{#24937}
git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@24937 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2014-10-28 13:24:18 +00:00
mstarzinger@chromium.org
d02f7210ef Make floating merges respected minimum RPO of coupled phis. 
R=bmeurer@chromium.org, jarin@chromium.org
TEST=cctest/test-scheduler/LoopedFloatingDiamond

Review URL: https://codereview.chromium.org/682983003

Cr-Commit-Position: refs/heads/master@{#24930}
git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@24930 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2014-10-28 11:38:48 +00:00
bmeurer@chromium.org
95095af57f [turbofan] Improve typed lowering for JSToBoolean. 
- JSToBoolean(x:string) => BooleanNot(NumberEqual(x.length, #0))
- JSToBoolean(phi(x1,...,xn):primitive) => phi(JSToBoolean(x1),...,JSToBoolean(xn))

TEST=cctest,mjsunit/asm/do-while,mjsunit/boolean,unittests
R=dcarney@chromium.org

Review URL: https://codereview.chromium.org/681223002

Cr-Commit-Position: refs/heads/master@{#24919}
git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@24919 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2014-10-28 08:34:15 +00:00
jarin@chromium.org
167fa99716 Revert "[turbofan] Merge GenericNode with Node." 
This reverts commit a238443c00 (r24915)
for tanking benchmarks.

TBR=mstarzinger@chromium.org
BUG=

Review URL: https://codereview.chromium.org/684693002

Cr-Commit-Position: refs/heads/master@{#24916}
git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@24916 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2014-10-27 22:34:44 +00:00
jarin@chromium.org
a238443c00 [turbofan] Merge GenericNode with Node. 
BUG=
R=mstarzinger@chromium.org

Review URL: https://codereview.chromium.org/676353002

Cr-Commit-Position: refs/heads/master@{#24915}
git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@24915 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2014-10-27 20:37:47 +00:00
wingo@igalia.com
0755160e28 Revert "Move AST node counting to post-pass" 
This reverts commit 698356720824559a6bd81c24be707b44ac277526 for
breaking regress-96526-002 among other things.

TBR=mstarzinger@chromium.org
BUG=

Review URL: https://codereview.chromium.org/678033002

Cr-Commit-Position: refs/heads/master@{#24910}
git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@24910 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2014-10-27 16:25:40 +00:00
wingo@igalia.com
88e0c38c9a Move AST node counting to post-pass 
R=mstarzinger@chromium.org, svenpanne@chromium.org
BUG=

Review URL: https://codereview.chromium.org/675493002

Cr-Commit-Position: refs/heads/master@{#24909}
git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@24909 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2014-10-27 15:00:43 +00:00
dcarney@chromium.org
91f4962343 [turbofan] reduce allocations outside of pipeline 
BUG=
R=bmeurer@chromium.org

Review URL: https://codereview.chromium.org/679793003

Cr-Commit-Position: refs/heads/master@{#24904}
git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@24904 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2014-10-27 12:40:13 +00:00
danno@chromium.org
16928e28d7 [turbofan] Reduce memory consumption of graph building 
Allow reservation of additional input capacity when creating nodes to prevent switching to deque representation when adding well-known additional inputs.

Also ensure that only a single temporary buffer is used to create temporary input arrays before allocating nodes.

R=mstarzinger@chromium.org

Review URL: https://codereview.chromium.org/644083003

Cr-Commit-Position: refs/heads/master@{#24896}
git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@24896 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2014-10-27 10:12:40 +00:00
titzer@chromium.org
82581534ae Implement control reducer, which reduces branches and phis together in a single fixpoint. 
R=bmeurer@chromium.org
BUG=

Review URL: https://codereview.chromium.org/665223006

Cr-Commit-Position: refs/heads/master@{#24891}
git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@24891 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2014-10-27 08:42:16 +00:00
titzer@chromium.org
21013d2641 Fix bugs in Scheduler hoisting and RPO loop bounds computations. 
R=mstarzinger@chromium.org
BUG=

Review URL: https://codereview.chromium.org/677683002

Cr-Commit-Position: refs/heads/master@{#24877}
git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@24877 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2014-10-24 13:57:39 +00:00
mstarzinger@chromium.org
a9a7979e9e Add Schedule::InsertBranch to fuse control flow graphs. 
R=jarin@chromium.org
TEST=cctest/test-schedule/TestScheduleInsertBranch

Review URL: https://codereview.chromium.org/675983002

Cr-Commit-Position: refs/heads/master@{#24876}
git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@24876 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2014-10-24 13:48:18 +00:00
jarin@chromium.org
c7685a59f0 [turbofan] Use range types to type and lower arithmetic ops. 
This is based on Georg's work on typing arithmetic operations (https://codereview.chromium.org/658743002/).

Instead of weakening to bitset types, we weaken to the closest 2^n
limit if we see that we are re-typing a node with a range type (which
means that the node can be part of a cycle, so we might need
to speed up the fixpoint there).

BUG=
R=rossberg@chromium.org

Review URL: https://codereview.chromium.org/636283009

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@24848 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2014-10-23 14:40:43 +00:00
bmeurer@chromium.org
80836787a3 [turbofan] Improve code generation for inline comparisons with zero. 
TEST=cctest,unittests
R=dcarney@chromium.org

Review URL: https://codereview.chromium.org/669133004

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@24832 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2014-10-23 10:22:06 +00:00
titzer@chromium.org
5a1774268a Add Terminate operator. 
Terminate is need for non-terminating loops (NTLs) that can appear after optimizing control flow. It gathers the control and effect(s) from a NTL and connects them to end so that they are not dead-code removed.

R=mstarzinger@chromium.org
BUG=

Review URL: https://codereview.chromium.org/651843004

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@24812 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
 2014-10-22 17:15:38 +00:00