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Author SHA1 Message Date
Roman Lebedev 5cce4aff18
[SimplifyCFG] TryToSimplifyUncondBranchFromEmptyBlock() already knows how to preserve DomTree 
... so just ensure that we pass DomTreeUpdater it into it.

Fixes DomTree preservation for a large number of tests,
all of which are marked as such so that they do not regress.
 2020-12-17 01:03:49 +03:00
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
Craig Topper 81d6d6b643 [SimplifyCFG] Regenerate some test cases using update_test_checks.py to prepare for an upcoming commit. NFC 
A future commit will change how some of the value names in the IR are generated which causes these tests to break in their current form. The script generates checks with regular expressions so it should be immune.

llvm-svn: 317023
 2017-10-31 19:03:49 +00:00
Sanjoy Das 54a3a006ca [SimplifyCFG] Fold `llvm.guard(false)` to unreachable 
Summary:
`llvm.guard(false)` always bails out of the current compilation unit, so
we can prune any control flow following it.

Reviewers: hfinkel, pcc, reames

Subscribers: majnemer, reames, mcrosier, llvm-commits

Differential Revision: http://reviews.llvm.org/D19245

llvm-svn: 266955
 2016-04-21 05:09:12 +00:00