cmd/internal/obj: replace Addr.U struct {...} with Val interface{}
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>
diff --git a/src/cmd/8g/peep.go b/src/cmd/8g/peep.go
index 1967d5f..2c9da45 100644
--- a/src/cmd/8g/peep.go
+++ b/src/cmd/8g/peep.go
@@ -797,7 +797,7 @@
if p.From.Node == p0.From.Node {
if p.From.Offset == p0.From.Offset {
if p.From.Scale == p0.From.Scale {
- if p.From.Type == obj.TYPE_FCONST && p.From.U.Dval == p0.From.U.Dval {
+ if p.From.Type == obj.TYPE_FCONST && p.From.Val.(float64) == p0.From.Val.(float64) {
if p.From.Index == p0.From.Index {
excise(r)
goto loop
