[release-branch.go1.25] cmd/compile: do not misscompile x+x << 63 to x << 0 on amd64 For #79182 Fixes #79190 Change-Id: I63ca6cb1bd3f6752a7e9b809cfffc8d45b7adc51 Reviewed-on: https://go-review.googlesource.com/c/go/+/774040 Auto-Submit: Jorropo <jorropo.pgm@gmail.com> Reviewed-by: Cherry Mui <cherryyz@google.com> Reviewed-by: Keith Randall <khr@google.com> Reviewed-by: Keith Randall <khr@golang.org> LUCI-TryBot-Result: golang-scoped@luci-project-accounts.iam.gserviceaccount.com <golang-scoped@luci-project-accounts.iam.gserviceaccount.com> (cherry picked from commit c3bfc824a58d8cd6871af6825a08a49e9ed16a26) Reviewed-on: https://go-review.googlesource.com/c/go/+/783601 Reviewed-by: Junyang Shao <shaojunyang@google.com> Reviewed-by: Jorropo <jorropo.pgm@gmail.com>
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