Commit Graph

9 Commits

Author SHA1 Message Date
Philip Reames aa297eac95 [docs] Further organization of the Performance Tips document
Arranging the language specific property section into readable groupings and adding a couple of notes about pass order, extensions, and the like.

For the record, suggestion for word smithing are welcomed.  I'm happy to revise; I'm just trying to get *something* in place.

llvm-svn: 245855
2015-08-24 17:38:58 +00:00
Philip Reames a3bf52caaa [docs] Organize the 'Performance Tips' page
This change just groups the suggestions by broad topic.  I'm planning a couple of follow on changes to improve the readability of this document.

llvm-svn: 245854
2015-08-24 17:19:18 +00:00
Tanya Lattner 0d28f80bd1 Rename all references to old mailing lists to new lists.llvm.org address.
llvm-svn: 243999
2015-08-05 03:51:17 +00:00
Philip Reames 5b07572df2 [PerformanceTips] Italics are *word*, not _word_
llvm-svn: 235827
2015-04-26 22:25:29 +00:00
Philip Reames e0e9083068 [PerformanceTips] Provide context on the impact of assume(x)
Sean Silva suggested I add something here a while back.  Sorry it's taken so long to get back to this.

llvm-svn: 235826
2015-04-26 22:23:12 +00:00
Philip Reames 65f335980d Add two new items to PerformanceTips
1) Turns out we're not great at recognizing redundant checks when one is a != and the other is an ==.  This is a bug, but it's one that matters to frontend authors.

2) Frontends shouldn't use intrinsics unless strictly neccessary.  This has been pretty widely proven by this point and is good to document.

llvm-svn: 235825
2015-04-26 22:15:18 +00:00
Philip Reames 34843ae51e Add a few more performance tips
These came from my own experience and may not apply equally to all use cases.  Any alternate perspective anyone has should be used to refine these.  

As always, grammar and spelling adjustments are more than welcome.  Please just directly commit a fix if you see something problematic.

llvm-svn: 231352
2015-03-05 05:55:55 +00:00
Philip Reames dd323acef5 [PerformanceTips] Document various items folks have suggested
This could stand to be expanded - patches welcome! - but let's at least write them down so they don't get forgotten.

llvm-svn: 230995
2015-03-02 19:19:04 +00:00
Philip Reames f8bf9ddde4 [new docs] Performance Tips for Frontend Authors
As mentioned on llvm-dev, this is a new documentation page intended to collect tips for frontend authors on how to generate IR that LLVM is able to optimize well. These types of things come up repeated in review threads and it would be good to have a place to save them.

I added a small handful to start us off, but I mostly want to get the framework in place. Once the docs are here, we can add to them incrementally.  If you know of something appropriate for this page, please add it!

Differential Revision: http://reviews.llvm.org/D7890

llvm-svn: 230807
2015-02-27 23:14:50 +00:00