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[dev.regabi] cmd/compile: separate dowidth better

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Having a global MaxWidth lets us avoid needing to
refer to thearch from split-out packages when all
they need is thearch.MAXWIDTH.

And make a couple interface changes to let dowidth
avoid importing package ir directly.
Then it can move into package types.

Change-Id: I2c12e8e22252597530e648848320e19bdd490a01
Reviewed-on: https://go-review.googlesource.com/c/go/+/279302
Trust: Russ Cox <rsc@golang.org>
Reviewed-by: Matthew Dempsky <mdempsky@google.com>
This commit is contained in:
Russ Cox 2020-12-21 01:55:44 -05:00
parent cb28c96be8
commit 7c8f5356ab
8 changed files with 51 additions and 17 deletions
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1
src/cmd/compile/internal/gc/main.go
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@ -208,6 +208,7 @@ func Main(archInit func(*Arch)) {
Widthptr = thearch.LinkArch.PtrSize
Widthreg = thearch.LinkArch.RegSize
MaxWidth = thearch.MAXWIDTH
Target = new(ir.Package)