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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
Florian Hahn 45682fd633 [LSR] Fix signed overflow in GenerateCrossUseConstantOffsets. 
For the attached test case, unchecked addition of immediate starts and
ends overflows, as they can be arbitrary i64 constants.

Proof: https://rise4fun.com/Alive/Plqc

Reviewers: qcolombet, gilr, efriedma

Reviewed By: efriedma

Differential Revision: https://reviews.llvm.org/D59218

llvm-svn: 357217
 2019-03-28 22:17:29 +00:00