cmd/compile: incorrect arm/arm64 simplification rules [1.16 backport] #48474

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1. gopherbot

   added

   CherryPickCandidateUsed during the release process for point releasesUsed during the release process for point releases

   on Sep 19, 2021
2. gopherbot

   added this to the Go1.16.9 milestone on Sep 19, 2021
3. gopherbot commented on Sep 20, 2021

   

   gopherbot

   on Sep 20, 2021

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   Change https://golang.org/cl/351072 mentions this issue: [release-branch.go1.16] cmd/compile: fix simplification rules on arm/arm64
4. randall77 commented on Sep 20, 2021

   

   randall77

   on Sep 20, 2021

   Contributor

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   This issue causes miscompilation. It's hard to trigger, but causes the compiler to generate wrong code if it does.
5. heschi

   added

   CherryPickApprovedUsed during the release process for point releasesUsed during the release process for point releases

   and removed

   CherryPickCandidateUsed during the release process for point releasesUsed during the release process for point releases

   on Oct 6, 2021
6. mknyszek

   modified the milestones: Go1.16.9, Go1.16.10 on Oct 7, 2021
7. gopherbot

   added a commit that references this issue on Oct 27, 2021

   [release-branch.go1.16] cmd/compile: fix simplification rules on arm/…

   ...

   This issue will close once commit cfe182c is merged into the 'master' branch.

   cfe182c
8. dmitshur commented on Oct 27, 2021

   

   dmitshur

   on Oct 27, 2021

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   Closed by merging cfe182c to release-branch.go1.16.
9. dmitshur

   closed this as completedon Oct 27, 2021
10. golang

    locked and limited conversation to collaborators on Oct 27, 2022
11. gopherbot

    added

    FrozenDueToAge

    on Oct 27, 2022