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Author SHA1 Message Date
Sam Parker 65f78e73ad [SimplifyCFG] Consider cost of combining predicates. 
Modify FoldBranchToCommonDest to consider the cost of inserting
instructions when attempting to combine predicates to fold blocks.
The threshold can be controlled via a new option:
-simplifycfg-branch-fold-threshold which defaults to '2' to allow
the insertion of a not and another logical operator.

Differential Revision: https://reviews.llvm.org/D86526
 2020-09-07 10:04:50 +01:00
Sam Parker ee2fdedd84 [NFC][SimplifyCFG] More tests for Arm 2020-08-25 12:13:48 +01:00
Sam Parker d4225b8f17 [NFC][SimplifyCFG] Add some more tests for Arm. 2020-08-25 11:44:17 +01:00
Sam Parker ac50efd67c [NFC][ARM][SimplifyCFG] Add some tests. 
Add some tests around thresholds and minsize.
 2020-08-11 15:13:58 +01:00