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cmd/internal/obj: replace Addr.U struct {...} with Val interface{}

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An interface{} is more in the spirit of the original union.
By my calculations, on 64-bit systems this reduces
Addr from 120 to 80 bytes, and Prog from 592 to 424 bytes.

Change-Id: I0d7b0981513c2a3c94c9ac76bb4f8816485b5a3c
Reviewed-on: https://go-review.googlesource.com/7744
Reviewed-by: Rob Pike <r@golang.org>
This commit is contained in:
Russ Cox 2015-03-16 15:54:44 -04:00
parent 631d6a33bf
commit 532ccae154
33 changed files with 164 additions and 164 deletions
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6
src/cmd/internal/obj/data.go
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@ -75,16 +75,16 @@ func savedata(ctxt *Link, s *LSym, p *Prog, pn string) {
ctxt.Diag("unexpected %d-byte floating point constant", siz)
case 4:
flt := math.Float32bits(float32(p.To.U.Dval))
flt := math.Float32bits(float32(p.To.Val.(float64)))
ctxt.Arch.ByteOrder.PutUint32(s.P[off:], flt)
case 8:
flt := math.Float64bits(p.To.U.Dval)
flt := math.Float64bits(p.To.Val.(float64))
ctxt.Arch.ByteOrder.PutUint64(s.P[off:], flt)
}
case TYPE_SCONST:
copy(s.P[off:off+siz], p.To.U.Sval)
copy(s.P[off:off+siz], p.To.Val.(string))
case TYPE_CONST, TYPE_ADDR:
if p.To.Sym != nil || int(p.To.Type) == TYPE_ADDR {