Commit 7863f742 authored by Keith Randall's avatar Keith Randall Committed by Alexander Rakoczy
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[release-branch.go1.15] cmd/compile: fix left shift constant folding rule 

The 32-bit left shift constant folding rule should keep its result
properly sign extended.

Fixes #41720
Fixes #41711

Change-Id: I0fc74444d444274e911952e1725dab0b7737a846
Reviewed-on: https://go-review.googlesource.com/c/go/+/258817


Trust: Keith Randall <khr@golang.org>
Run-TryBot: Keith Randall <khr@golang.org>
Reviewed-by: default avatarDavid Chase <drchase@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
parent 8b224e99
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