mirror of
https://github.com/RPCS3/llvm.git
synced 2026-01-31 01:25:19 +01:00
addf0bb7c5
This is a subset of the original commit from rL359879 which was reverted because it could crash when using the 'RemovedInstructions' structure that enables delayed deletion of dead instructions. The motivating compile-time win does not require that change though. We should get most of that win from this change alone. Using/updating a dominator tree to match math overflow patterns may be very expensive in compile-time (because of the way CGP uses a DT), so just handle the single-block case. See post-commit thread for rL354298 for more details: http://lists.llvm.org/pipermail/llvm-commits/Week-of-Mon-20190422/646276.html Differential Revision: https://reviews.llvm.org/D61075 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@359969 91177308-0d34-0410-b5e6-96231b3b80d8