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[dev.typeparams] cmd/compile: introduce named gcshape types

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Still 1-1 with real types, but now with their own names!

Shape types are implicitly convertible to (and convertible from)
the types they represent.

Change-Id: I0133a8d8fbeb369380574b075a32b3c987e314d5
Reviewed-on: https://go-review.googlesource.com/c/go/+/335170
Run-TryBot: Keith Randall <khr@golang.org>
Trust: Keith Randall <khr@golang.org>
Trust: Dan Scales <danscales@google.com>
Reviewed-by: Dan Scales <danscales@google.com>
This commit is contained in:
Keith Randall 2021-06-09 19:30:16 -07:00
parent 897970688b
commit a7a17f0ca8
7 changed files with 317 additions and 32 deletions
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5
src/cmd/internal/obj/objfile.go
View file

@ -452,6 +452,11 @@ func (w *writer) contentHash(s *LSym) goobj.HashType {
binary.LittleEndian.PutUint64(tmp[6:14], uint64(r.Add))
h.Write(tmp[:])
rs := r.Sym
if rs == nil {
fmt.Printf("symbol: %s\n", s)
fmt.Printf("relocation: %#v\n", r)
panic("nil symbol target in relocation")
}
switch rs.PkgIdx {
case goobj.PkgIdxHashed64:
h.Write([]byte{0})