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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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10
src/cmd/internal/obj/arm/obj5.go
View file

@ -107,8 +107,8 @@ func progedit(ctxt *obj.Link, p *obj.Prog) {
// Rewrite float constants to values stored in memory.
switch p.As {
case AMOVF:
if p.From.Type == obj.TYPE_FCONST && chipfloat5(ctxt, p.From.U.Dval) < 0 && (chipzero5(ctxt, p.From.U.Dval) < 0 || p.Scond&C_SCOND != C_SCOND_NONE) {
f32 := float32(p.From.U.Dval)
if p.From.Type == obj.TYPE_FCONST && chipfloat5(ctxt, p.From.Val.(float64)) < 0 && (chipzero5(ctxt, p.From.Val.(float64)) < 0 || p.Scond&C_SCOND != C_SCOND_NONE) {
f32 := float32(p.From.Val.(float64))
i32 := math.Float32bits(f32)
literal := fmt.Sprintf("$f32.%08x", i32)
s := obj.Linklookup(ctxt, literal, 0)
@ -125,8 +125,8 @@ func progedit(ctxt *obj.Link, p *obj.Prog) {
}
case AMOVD:
if p.From.Type == obj.TYPE_FCONST && chipfloat5(ctxt, p.From.U.Dval) < 0 && (chipzero5(ctxt, p.From.U.Dval) < 0 || p.Scond&C_SCOND != C_SCOND_NONE) {
i64 := math.Float64bits(p.From.U.Dval)
if p.From.Type == obj.TYPE_FCONST && chipfloat5(ctxt, p.From.Val.(float64)) < 0 && (chipzero5(ctxt, p.From.Val.(float64)) < 0 || p.Scond&C_SCOND != C_SCOND_NONE) {
i64 := math.Float64bits(p.From.Val.(float64))
literal := fmt.Sprintf("$f64.%016x", i64)
s := obj.Linklookup(ctxt, literal, 0)
if s.Type == 0 {
@ -201,7 +201,7 @@ func preprocess(ctxt *obj.Link, cursym *obj.LSym) {
autoffset = 0
}
cursym.Locals = autoffset
cursym.Args = p.To.U.Argsize
cursym.Args = p.To.Val.(int32)
if ctxt.Debugzerostack != 0 {
if autoffset != 0 && p.From3.Offset&obj.NOSPLIT == 0 {