tree 7b1bae936b3edd65a76493ab00cdeba1841d328f
parent 7c29aa76245c7e42d15f8eb826056eec996e226a
author Hans Wennborg <hans@hanshq.net> 1555416805 +0000
committer Hans Wennborg <hans@hanshq.net> 1555416805 +0000

Re-commit r357452: SimplifyCFG SinkCommonCodeFromPredecessors: Also sink function calls without used results (PR41259)

The original commit caused false positives from AddressSanitizer's
use-after-scope checks, which have now been fixed in r358478.

> The code was previously checking that candidates for sinking had exactly
> one use or were a store instruction (which can't have uses). This meant
> we could sink call instructions only if they had a use.
>
> That limitation seemed a bit arbitrary, so this patch changes it to
> "instruction has zero or one use" which seems more natural and removes
> the need to special-case stores.
>
> Differential revision: https://reviews.llvm.org/D59936

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@358483 91177308-0d34-0410-b5e6-96231b3b80d8