7f90b960a9
v = ... compute some value, which zeros top 32 bits ... w = zero-extend v We want to remove the zero-extension operation, as it doesn't do anything. But if v is typed as a signed value, and it gets spilled/restored, it might be re-sign-extended upon restore. So the zero-extend isn't actually a NOP when there might be calls or other reasons to spill in between v and w. Fixes #68227 Change-Id: I3b30b8e56c7d70deac1fb09d2becc7395acbadf8 Reviewed-on: https://go-review.googlesource.com/c/go/+/595675 LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com> Reviewed-by: Joedian Reid <joedian@google.com> Reviewed-by: Cuong Manh Le <cuong.manhle.vn@gmail.com> Reviewed-by: Cherry Mui <cherryyz@google.com> |
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The Go Programming Language
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