[PATCH] D124549: [SimpleLoopUnswitch] Freeze trivial conditions if needed.

Nikita Popov via Phabricator via llvm-commits llvm-commits at lists.llvm.org
Wed Apr 27 12:30:50 PDT 2022


nikic added a reviewer: nikic.
nikic added inline comments.


================
Comment at: llvm/test/Transforms/SimpleLoopUnswitch/LIV-loop-condtion.ll:11
 ; CHECK-NEXT:  entry:
-; CHECK-NEXT:    br i1 %cond1, label %entry.split, label %loop_exit.split
+; CHECK-NEXT:    [[FROZEN:%.+]] = freeze i1 %cond1
+; CHECK-NEXT:    br i1 [[FROZEN]], label %entry.split, label %loop_exit.split
----------------
This freeze doesn't look necessary -- shouldn't there be a "not guaranteed to execute" check involved?


Repository:
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  https://reviews.llvm.org/D124549/new/

https://reviews.llvm.org/D124549



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