| commit | 6211a024b491f3df6bf3eab11dd50259525b8713 | [log] [tgz] |
|---|---|---|
| author | Paul E. Murphy <murp@ibm.com> | Tue Jul 11 09:07:43 2023 -0500 |
| committer | Gopher Robot <gobot@golang.org> | Wed Jul 19 19:10:08 2023 +0000 |
| tree | a563f2be5e7b77dcd72e5f75781f800ee5519802 | |
| parent | 2c358ffe9762ba08c8db0196942395f97775e31b [diff] |
[release-branch.go1.20] cmd/compile: on PPC64, fix sign/zero extension when masking (ANDCCconst [y] (MOV.*reg x)) should only be merged when zero extending. Otherwise, sign bits are lost on negative values. (ANDCCconst [0xFF] (MOVBreg x)) should be simplified to a zero extension of x. Likewise for the MOVHreg variant. Fixes #61320 Change-Id: I04e4fd7dc6a826e870681f37506620d48393698b Reviewed-on: https://go-review.googlesource.com/c/go/+/508775 TryBot-Result: Gopher Robot <gobot@golang.org> Run-TryBot: Paul Murphy <murp@ibm.com> Reviewed-by: Bryan Mills <bcmills@google.com> Reviewed-by: Cherry Mui <cherryyz@google.com> Reviewed-on: https://go-review.googlesource.com/c/go/+/509195 Auto-Submit: Heschi Kreinick <heschi@google.com>
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