Commit Graph

57 Commits

Author SHA1 Message Date
Jim Lin dec3154c16 [Docs] Fix incorrect return type for example code 2021-06-10 14:20:11 +08:00
Jim Lin 9751af22c4 [Docs] Fix incorrect return type for example code 2021-06-09 15:22:49 +08:00
xgupta 94fac81fcc [Branch-Rename] Fix some links
According to the [[ https://foundation.llvm.org/docs/branch-rename/ | status of branch rename ]], the master branch of the LLVM repository is removed on 28 Jan 2021.

Reviewed By: mehdi_amini

Differential Revision: https://reviews.llvm.org/D95766
2021-02-01 16:43:21 +05:30
Bardia Mahjour a7e2c26939 [LV] Epilogue Vectorization with Optimal Control Flow (Recommit)
This is yet another attempt at providing support for epilogue
vectorization following discussions raised in RFC http://llvm.1065342.n5.nabble.com/llvm-dev-Proposal-RFC-Epilog-loop-vectorization-tt106322.html#none
and reviews D30247 and D88819.

Similar to D88819, this patch achieve epilogue vectorization by
executing a single vplan twice: once on the main loop and a second
time on the epilogue loop (using a different VF). However it's able
to handle more loops, and generates more optimal control flow for
cases where the trip count is too small to execute any code in vector
form.

Reviewed By: SjoerdMeijer

Differential Revision: https://reviews.llvm.org/D89566
2020-12-02 10:09:56 -05:00
Bardia Mahjour c94af03f7f Revert "[LV] Epilogue Vectorization with Optimal Control Flow"
This reverts commit 9c5504adce.
Reverting to investigate build failure in http://lab.llvm.org:8011/#/builders/98/builds/1461/steps/9
2020-12-01 12:50:36 -05:00
Bardia Mahjour 9c5504adce [LV] Epilogue Vectorization with Optimal Control Flow
This is yet another attempt at providing support for epilogue
vectorization following discussions raised in RFC http://llvm.1065342.n5.nabble.com/llvm-dev-Proposal-RFC-Epilog-loop-vectorization-tt106322.html#none
and reviews D30247 and D88819.

Similar to D88819, this patch achieve epilogue vectorization by
executing a single vplan twice: once on the main loop and a second
time on the epilogue loop (using a different VF). However it's able
to handle more loops, and generates more optimal control flow for
cases where the trip count is too small to execute any code in vector
form.

Reviewed By: SjoerdMeijer

Differential Revision: https://reviews.llvm.org/D89566
2020-12-01 12:04:29 -05:00
Afanasyev Ivan 8b74596b7e [Docs] remove unused arguments in documentation examples on vectorization passes
Reviewers: nadav, tyler.nowicki

Reviewed By: nadav

Differential Revision: https://reviews.llvm.org/D83851
2020-07-27 10:20:26 +01:00
Sylvestre Ledru 72fd1033ea Doc: Links should use https 2020-03-22 22:49:33 +01:00
Sjoerd Meijer f70109f70c [doc] typo in optimisation remark example
Fix typo in the vectorisation optimisation remarks example:

  -Rpass-missed=loop-vectorized
=>
  -Rpass-missed=loop-vectorize
2020-02-06 14:55:18 +00:00
Sanjay Patel a0c558ee4c [Docs] Improve SLP code snippet
New C code snippet is more viable for SLP vectorization in most architectures.

Patch by: @lsandov1 (Leonardo Sandoval)

Differential Revision: https://reviews.llvm.org/D70866
2019-12-10 09:32:40 -05:00
James Y Knight 786558882c Update GettingStarted guide to recommend that people use the new
official Git repository.

Remove the directions for using git-svn, and demote the prominence of
the svn instructions.

Also, fix a few other issues while I'm in there:

* Mention LLVM_ENABLE_PROJECTS more.
* Getting started doesn't need to mention test-suite, but should
  mention clang and the other projects.
* Remove mentions of "configure", since that's long gone.

I've also adjusted a few other mentions of svn to point to github, but
have not done so comprehensively.

Differential Revision: https://reviews.llvm.org/D56654

llvm-svn: 351130
2019-01-14 22:27:32 +00:00
Sanjay Patel 9afb59b639 [Docs] fix typo, adjust text order
llvm-svn: 350846
2019-01-10 17:02:55 +00:00
Sanjay Patel 080502e923 [Docs] add note to avoid 'errno' for better vectorization (PR40265)
This is a partial fix for the documentation improvements requested in:
https://bugs.llvm.org/show_bug.cgi?id=40265

llvm-svn: 350845
2019-01-10 16:57:28 +00:00
Vedant Kumar a9ae2fe782 docs: Remove reference to a deprecated flag
llvm-svn: 323254
2018-01-23 20:22:37 +00:00
Eli Friedman 157dc73479 [docs] Update name of vectorization interleave flag.
llvm-svn: 304370
2017-05-31 23:02:55 +00:00
Ayal Zaks 4c4baf5093 [Docs] Add VectorizationPlan to docs/Proposals.
Following the request made in https://reviews.llvm.org/D32871, the
general documentation of the Vectorization Plan is hereby placed
under docs/Proposals.

llvm-svn: 304161
2017-05-29 15:36:23 +00:00
Ayal Zaks 589e1d9610 [LV] Report multiple reasons for not vectorizing under allowExtraAnalysis
The default behavior of -Rpass-analysis=loop-vectorizer is to report only the
first reason encountered for not vectorizing, if one is found, at which time the
vectorizer aborts its handling of the loop. This patch allows multiple reasons
for not vectorizing to be identified and reported, at the potential expense of
additional compile-time, under allowExtraAnalysis which can currently be turned
on by Clang's -fsave-optimization-record and opt's -pass-remarks-missed.

Removed from LoopVectorizationLegality::canVectorize() the redundant checking
and reporting if we CantComputeNumberOfIterations, as LAI::canAnalyzeLoop() also
does that. This redundancy is caught by a lit test once multiple reasons are
reported.

Patch initially developed by Dror Barak.

Differential Revision: https://reviews.llvm.org/D33396

llvm-svn: 303613
2017-05-23 07:08:02 +00:00
Ed Maste 8ed40ce56d Correct 'teh' and other typos / repeated words.
Patch by Eitan Adler.

Differential Revision:	http://reviews.llvm.org/D8514

llvm-svn: 234939
2015-04-14 20:52:58 +00:00
Tyler Nowicki dcb863263b Vectorization documentation for loop hint pragmas and Rpass diagnostics.
llvm-svn: 211924
2014-06-27 18:30:08 +00:00
Arnold Schwaighofer 9ab93ac6d4 Fix whitespace in vectorizer example
llvm-svn: 203738
2014-03-12 23:58:07 +00:00
Arnold Schwaighofer 34ac9be1d7 Fix vectorizer docs.
This example is not vectorized because LLVM does not prove no-wrapping of
"a[i*7] += ...".

llvm-svn: 203734
2014-03-12 23:23:44 +00:00
Nadav Rotem 2da8b3e99e Update the docs.
llvm-svn: 187713
2013-08-05 04:27:34 +00:00
Nadav Rotem 87856b50cf The SLP Vectorizer works across basic blocks. Update the docs.
llvm-svn: 184973
2013-06-26 17:59:35 +00:00
Nadav Rotem 136d50adb2 Fix a grammar mistake, and add a line about the two phases that the BB/SLP vectorizers have (top-down and bottom-up).
llvm-svn: 179566
2013-04-15 22:21:25 +00:00
Nadav Rotem c875cc1273 Fix the internal link.
llvm-svn: 179565
2013-04-15 22:11:07 +00:00
Nadav Rotem a440a356e0 Document our desire to enable the loop vectorizer on -Os in future releases.
llvm-svn: 179511
2013-04-15 05:56:55 +00:00
Nadav Rotem 57da1fdd55 Docs: merge the description of the BB and SLP vectorizers and document the -fslp-vectorize-aggressive flag.
llvm-svn: 179510
2013-04-15 05:53:23 +00:00
Nadav Rotem efa56e18be Document the SLP infrastructure.
llvm-svn: 179480
2013-04-14 07:42:25 +00:00
Nadav Rotem 757aec9507 Remove the confusing sentence.
llvm-svn: 179085
2013-04-09 04:48:40 +00:00
Nadav Rotem fe47d58cf0 Update the docs about the fact that the loop vectorizer is enabled by default for -O3.
llvm-svn: 179060
2013-04-08 21:34:49 +00:00
Benjamin Kramer a87d5128dd Brag about function call vectorization in the docs.
llvm-svn: 176292
2013-02-28 19:33:46 +00:00
Renato Golin f2ea19ea2e Add global structure vectorization to docs
llvm-svn: 175965
2013-02-23 13:25:41 +00:00
Nadav Rotem 9f20781bad Docs: mention that we support float reductions when -ffast-math is used.
llvm-svn: 171873
2013-01-08 17:46:30 +00:00
Nadav Rotem 014e19c2ca Add linpack-pc bench
llvm-svn: 171499
2013-01-04 19:00:42 +00:00
Nadav Rotem 7daadf21fe Update the docs about the new unroll features.
llvm-svn: 171470
2013-01-04 17:49:45 +00:00
Nadav Rotem 7ea18a763b Reformat the rst text.
llvm-svn: 171449
2013-01-03 01:56:33 +00:00
Nadav Rotem a616d68f2c LoopVectorizer: Document the unrolling feature.
llvm-svn: 171445
2013-01-03 01:47:02 +00:00
Nadav Rotem a1d2436b5f revert an accidental commit.
llvm-svn: 171098
2012-12-26 06:16:03 +00:00
Nadav Rotem 7375d35711 Doc: add fmuladd to the list of vectorizeable functions. Thanks hfinkel.
llvm-svn: 171094
2012-12-26 06:03:35 +00:00
Sean Silva 850861df62 docs: More robust image scaling fix.
Hopefully these benchmarks will be updated in the future, so avoid
hardcoding image dimensions.

llvm-svn: 170819
2012-12-21 00:28:42 +00:00
Sean Silva 35915c6459 docs: Prevent image scaling.
Tell the image to be its natural size.

llvm-svn: 170816
2012-12-21 00:20:25 +00:00
Sean Silva 287e7d275c docs: Cleanup trailing whitespace.
llvm-svn: 170799
2012-12-20 22:59:36 +00:00
Sean Silva e140b2ee67 docs: actually indent these consistently
llvm-svn: 170792
2012-12-20 22:49:13 +00:00
Sean Silva 8c44a4733c docs: Indent consistently in code examples.
llvm-svn: 170791
2012-12-20 22:47:41 +00:00
Sean Silva 99e12f91a6 docs: Improve navigation for Vectorizers.rst
Add links in the intro paragraph.
Add table of contents.

llvm-svn: 170790
2012-12-20 22:42:20 +00:00
Sean Silva fd706f7da9 docs: bring back link for reddit.
llvm-svn: 170776
2012-12-20 22:24:37 +00:00
Sean Silva eae2d90508 docs: Make document name congruent with title.
Hopefully nobody has linked to it yet...

OK'd by Nadav.

llvm-svn: 170768
2012-12-20 21:50:41 +00:00
Sean Silva 08fd0888cb docs: Clean up adornments.
For whatever reason the usage of '^^^' and '---' adornments were
reversed compared to the "canonical" style of the LLVM docs (which is
currently "the style used in SphinxQuickstartTemplate.rst"). This change
doesn't affect the document structure at all, I'm just doing it for
trivial stylistic consistency (the document content is *much* more
important---thanks Nadav for writing this up!).

Also, trim the adornments to be the same length as the section names.

llvm-svn: 170638
2012-12-20 02:40:45 +00:00
Sean Silva 13ed79c66b docs: ASCII-fy
llvm-svn: 170637
2012-12-20 02:23:25 +00:00
Nadav Rotem 12da396abc Doc: update the chart.
llvm-svn: 170618
2012-12-20 00:03:36 +00:00