Chandler Carruth a360b737fa [PM/Unswitch] Teach the new simple loop unswitch to handle loop ... invariant PHI inputs and to rewrite PHI nodes during the actual unswitching. The checking is quite easy, but rewriting the PHI nodes is somewhat surprisingly challenging. This should handle both branches and switches. I think this is now a full featured trivial unswitcher, and more full featured than the trivial cases in the old pass while still being (IMO) somewhat simpler in how it works. Next up is to verify its correctness in more widespread testing, and then to add non-trivial unswitching. Thanks to Davide and Sanjoy for the excellent review. There is one remaining question that I may address in a follow-up patch (see the review thread for details) but it isn't related to the functionality specifically. Differential Revision: https://reviews.llvm.org/D32699 llvm-svn: 302867		2017-05-12 02:19:59 +00:00
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Coroutines	[IR] Abstract away ArgNo+1 attribute indexing as much as possible	2017-05-03 18:17:31 +00:00
Hello	Add auto-exporting of symbols from tools so that plugins work on Windows	2016-05-26 11:16:43 +00:00
InstCombine	[InstCombine] remove fold that swaps xor/or with constants; NFCI	2017-05-10 21:33:55 +00:00
Instrumentation	[msan] Fix PR32842	2017-05-11 11:07:48 +00:00
IPO	Remove spurious cast of nullptr. NFC.	2017-05-11 08:53:00 +00:00
ObjCARC	[IR] Abstract away ArgNo+1 attribute indexing as much as possible	2017-05-03 18:17:31 +00:00
Scalar	[PM/Unswitch] Teach the new simple loop unswitch to handle loop	2017-05-12 02:19:59 +00:00
Utils	Remove spurious cast of nullptr. NFC.	2017-05-11 08:53:00 +00:00
Vectorize	[SLP] Emit optimization remarks	2017-05-11 17:06:17 +00:00
CMakeLists.txt	[coroutines] Part 3 of N: Adding Boilerplate for Coroutine Passes	2016-07-28 21:04:31 +00:00
LLVMBuild.txt	[coroutines] Part 3 of N: Adding Boilerplate for Coroutine Passes	2016-07-28 21:04:31 +00:00