OSchip
/
llvm-project
mirror of https://github.com/THU-DSP-LAB/llvm-project.git
13
0
Fork 6
Code Issues Packages Projects Releases Wiki Activity
417,948 Commits 31 Branches 0 Tags 2.2 GiB
Commit Graph

3 Commits

Author SHA1 Message Date
Max Kazantsev 073b254cff [SimplifyCFG] Redirect switch cases that lead to UB into an unreachable block 
When following a case of a switch instruction is guaranteed to lead to
UB, we can safely break these edges and redirect those cases into a newly
created unreachable block. As result, CFG will become simpler and we can
remove some of Phi inputs to make further analyzes easier.

Patch by Dmitry Bakunevich!

Differential Revision: https://reviews.llvm.org/D109428
Reviewed By: lebedev.ri
 2021-09-21 10:45:19 +07:00
Max Kazantsev 7e337d8ba2 [Test] Add more sophisticated tests for switch UB opt 
Optimizer is being too smart with existing tests, and the transform
gets concealed by following transforms.
 2021-09-13 15:28:23 +07:00
Max Kazantsev 09d0fa3bbe [Test] Add tests showing missed opportunity for SimplifyCFG for switches 
Patch by Dmitry Bakunevich!
 2021-09-10 11:16:13 +07:00