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[dev.regabi] cmd/compile: cleanup for concrete types - mop-up

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An automated rewrite will add concrete type assertions after
a test of n.Op(), when n can be safely type-asserted
(meaning, n is not reassigned a different type, n is not reassigned
and then used outside the scope of the type assertion,
and so on).

This sequence of CLs handles the code that the automated
rewrite does not: adding specific types to function arguments,
adjusting code not to call n.Left() etc when n may have multiple
representations, and so on.

This CL handles all the little files that are left.

Passes buildall w/ toolstash -cmp.

Change-Id: I6588c92dbbdd37342a77b365d70e02134a033d2a
Reviewed-on: https://go-review.googlesource.com/c/go/+/277932
Trust: Russ Cox <rsc@golang.org>
Reviewed-by: Matthew Dempsky <mdempsky@google.com>
This commit is contained in:
Russ Cox 2020-12-10 18:48:33 -05:00
parent be64c8bece
commit 9c384e881e
15 changed files with 77 additions and 53 deletions
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4
src/cmd/compile/internal/gc/main.go
View file

@ -244,7 +244,7 @@ func Main(archInit func(*Arch)) {
timings.Start("fe", "typecheck", "top1")
for i := 0; i < len(xtop); i++ {
n := xtop[i]
if op := n.Op(); op != ir.ODCL && op != ir.OAS && op != ir.OAS2 && (op != ir.ODCLTYPE || !n.Left().Name().Alias()) {
if op := n.Op(); op != ir.ODCL && op != ir.OAS && op != ir.OAS2 && (op != ir.ODCLTYPE || !n.(*ir.Decl).Left().Name().Alias()) {
xtop[i] = typecheck(n, ctxStmt)
}
}
@ -256,7 +256,7 @@ func Main(archInit func(*Arch)) {
timings.Start("fe", "typecheck", "top2")
for i := 0; i < len(xtop); i++ {
n := xtop[i]
if op := n.Op(); op == ir.ODCL || op == ir.OAS || op == ir.OAS2 || op == ir.ODCLTYPE && n.Left().Name().Alias() {
if op := n.Op(); op == ir.ODCL || op == ir.OAS || op == ir.OAS2 || op == ir.ODCLTYPE && n.(*ir.Decl).Left().Name().Alias() {
xtop[i] = typecheck(n, ctxStmt)
}
}