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[dev.regabi] cmd/compile: replace CTNIL with ONIL

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Properly speaking, "nil" is a zero value, not a constant. So
go/constant does not have a representation for it. To allow replacing
Val with constant.Value, we split out ONIL separately from OLITERAL so
we can get rid of CTNIL.

Passes toolstash-check.

Change-Id: I4c8e60cae3b3c91bbac43b3b0cf2a4ade028d6cb
Reviewed-on: https://go-review.googlesource.com/c/go/+/272650
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Robert Griesemer <gri@golang.org>
Trust: Matthew Dempsky <mdempsky@google.com>
This commit is contained in:
Matthew Dempsky 2020-11-13 20:38:21 -08:00
parent 4af2decf30
commit 88a9e2f9ad
18 changed files with 100 additions and 87 deletions
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2
src/cmd/compile/internal/gc/syntax.go
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@ -294,7 +294,7 @@ func (n *Node) SetIota(x int64) {
// Extra care must be taken when mutating such a node.
func (n *Node) mayBeShared() bool {
switch n.Op {
case ONAME, OLITERAL, OTYPE:
case ONAME, OLITERAL, ONIL, OTYPE:
return true
}
return false