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[dev.regabi] cmd/compile: make ir.Name the ONAME Node implementation

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Before this CL, an ONAME Node was represented by three structs
linked together: a node, a Name, and a Param. Previous CLs removed
OLABEL and OPACK from the set of nodes that knew about Name.
Now Name can be repurposed to *be* the ONAME Node implementation,
replacing three linked structs totaling 152+64+88 = 304 bytes (64-bit)
with a single 232-byte struct.

Many expressions in the code become simpler as well, without having
to use .Param. and sometimes even .Name().
(For a node n where n.Name() != nil, n.Name() == n.(*Name) now.)

Passes buildall w/ toolstash -cmp.

Change-Id: Ie719f1285c05623b9fd2faaa059e5b360a64b3be
Reviewed-on: https://go-review.googlesource.com/c/go/+/274094
Trust: Russ Cox <rsc@golang.org>
Run-TryBot: Russ Cox <rsc@golang.org>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Matthew Dempsky <mdempsky@google.com>
This commit is contained in:
Russ Cox 2020-11-28 01:41:13 -05:00
parent f6106d195d
commit 862f638a89
24 changed files with 256 additions and 265 deletions
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2
src/cmd/compile/internal/gc/subr.go
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@ -136,7 +136,7 @@ func importdot(opkg *types.Pkg, pack *ir.PkgName) {
}
// newname returns a new ONAME Node associated with symbol s.
func NewName(s *types.Sym) ir.Node {
func NewName(s *types.Sym) *ir.Name {
n := ir.NewNameAt(base.Pos, s)
n.Name().Curfn = Curfn
return n