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Author SHA1 Message Date
Eric Christopher cee313d288 Revert "Temporarily Revert "Add basic loop fusion pass."" 
The reversion apparently deleted the test/Transforms directory.

Will be re-reverting again.

llvm-svn: 358552
 2019-04-17 04:52:47 +00:00
Eric Christopher a863435128 Temporarily Revert "Add basic loop fusion pass." 
As it's causing some bot failures (and per request from kbarton).

This reverts commit r358543/ab70da07286e618016e78247e4a24fcb84077fda.

llvm-svn: 358546
 2019-04-17 02:12:23 +00:00
Alina Sbirlea d2d3244363 [LoopSimplifyCFG] Update MemorySSA after r353911. 
Summary:
MemorySSA is not properly updated in LoopSimplifyCFG after recent changes. Use SplitBlock utility to resolve that and clear all updates once handleDeadExits is finished.
All updates that follow are removal of edges which are safe to handle via the removeEdge() API.
Also, deleting dead blocks is done correctly as is, i.e. delete from MemorySSA before updating the CFG and DT.

Reviewers: mkazantsev, rtereshin

Subscribers: sanjoy, jlebar, Prazek, george.burgess.iv, llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D58524

llvm-svn: 354613
 2019-02-21 19:54:05 +00:00
Max Kazantsev 8ff2e86994 [NFC] Replace EOL in test file 
llvm-svn: 354562
 2019-02-21 09:56:23 +00:00
Max Kazantsev b672602f9e [TEST] Add failing test that shows problems with MSSA update in LoopSimplifyCFG 
llvm-svn: 354559
 2019-02-21 09:40:24 +00:00