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[dev.typeparams] cmd/compile: fix windows longtest builder

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CL 332469 broke the Windows longtest builders, because it changed the
names assigned to autotmp variables that end up in export data.

The naming of autotmps doesn't actually matter, so instead we can just
hack iexport to write out "$autotmp" as a magic marker, and let the
reader replace it with an appropriate unique name. This is a little
hacky, but so is iexport's handling of autotmps already, and this
should also go away eventually with unified IR.

Change-Id: Ic17395337c745b66b9d63ee566299290214e6273
Reviewed-on: https://go-review.googlesource.com/c/go/+/333089
Trust: Matthew Dempsky <mdempsky@google.com>
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
Reviewed-by: Cuong Manh Le <cuong.manhle.vn@gmail.com>
TryBot-Result: Go Bot <gobot@golang.org>
This commit is contained in:
Matthew Dempsky 2021-07-07 04:03:24 -07:00
parent 501725032c
commit c65ca97a45
2 changed files with 19 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

11
src/cmd/compile/internal/typecheck/iexport.go
View File

@ -2116,8 +2116,15 @@ func (w *exportWriter) localIdent(s *types.Sym) {
return
}
// TODO(mdempsky): Fix autotmp hack.
if i := strings.LastIndex(name, "."); i >= 0 && !strings.HasPrefix(name, ".autotmp_") && !strings.HasPrefix(name, ".dict") { // TODO: just use autotmp names for dictionaries?
// The name of autotmp variables isn't important; they just need to
// be unique. To stabilize the export data, simply write out "$" as
// a marker and let the importer generate its own unique name.
if strings.HasPrefix(name, ".autotmp_") {
w.string("$autotmp")
return
}
if i := strings.LastIndex(name, "."); i >= 0 && !strings.HasPrefix(name, ".dict") { // TODO: just use autotmp names for dictionaries?
base.Fatalf("unexpected dot in identifier: %v", name)
}

12
src/cmd/compile/internal/typecheck/iimport.go
View File

@ -265,6 +265,7 @@ type importReader struct {
// Slice of all dcls for function, including any interior closures
allDcls []*ir.Name
allClosureVars []*ir.Name
autotmpgen int
}
func (p *iimporter) newReader(off uint64, pkg *types.Pkg) *importReader {
@ -516,8 +517,15 @@ func (r *importReader) ident(selector bool) *types.Sym {
return nil
}
pkg := r.currPkg
if selector && types.IsExported(name) {
pkg = types.LocalPkg
if selector {
if types.IsExported(name) {
pkg = types.LocalPkg
}
} else {
if name == "$autotmp" {
name = autotmpname(r.autotmpgen)
r.autotmpgen++
}
}
return pkg.Lookup(name)
}