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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 a782a70ad9 [EarlyCSEwMemorySSA] Add MSSA verification and tests to make EarlyCSE failures easier to track. 
Summary:
EarlyCSE can make IR changes that will leave MemorySSA with accesses claiming to be optimized, but for which a subsequent MemorySSA run will yield a different optimized result.
Due to relying on AA queries, we can't fix this in general, unless we recompute MemorySSA.
Adding some tests to track this and a basic verify for future potential failures.

Reviewers: george.burgess.iv, gberry

Subscribers: sanjoy, jlebar, Prazek, llvm-commits

Differential Revision: https://reviews.llvm.org/D51960

llvm-svn: 342422
 2018-09-17 22:35:21 +00:00