cmd/compile, cmd/link, reflect, runtime: remove type.zero field
No longer used after previous hashmap change.
Change-Id: I558470f872281e84a78406132df4e391d077b833
Reviewed-on: https://go-review.googlesource.com/13785
Run-TryBot: Michael Hudson-Doyle <michael.hudson@canonical.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
diff --git a/src/cmd/compile/internal/gc/reflect.go b/src/cmd/compile/internal/gc/reflect.go
index 16f0c5b..9463379 100644
--- a/src/cmd/compile/internal/gc/reflect.go
+++ b/src/cmd/compile/internal/gc/reflect.go
@@ -796,11 +796,6 @@
gcsym, useGCProg, ptrdata := dgcsym(t)
- // We use size 0 here so we get the pointer to the zero value,
- // but don't allocate space for the zero value unless we need it.
- // TODO: how do we get this symbol into bss? We really want
- // a read-only bss, but I don't think such a thing exists.
-
// ../../pkg/reflect/type.go:/^type.commonType
// actual type structure
// type commonType struct {
@@ -816,7 +811,6 @@
// string *string
// *extraType
// ptrToThis *Type
- // zero unsafe.Pointer
// }
ot = duintptr(s, ot, uint64(t.Width))
ot = duintptr(s, ot, uint64(ptrdata))
@@ -869,7 +863,6 @@
ot += Widthptr
ot = dsymptr(s, ot, sptr, 0) // ptrto type
- ot = duintptr(s, ot, 0) // ptr to zero value (unused)
return ot
}
@@ -1052,7 +1045,7 @@
switch t.Etype {
default:
ot = dcommontype(s, ot, t)
- xt = ot - 3*Widthptr
+ xt = ot - 2*Widthptr
case TARRAY:
if t.Bound >= 0 {
@@ -1064,7 +1057,7 @@
t2.Bound = -1 // slice
s2 := dtypesym(t2)
ot = dcommontype(s, ot, t)
- xt = ot - 3*Widthptr
+ xt = ot - 2*Widthptr
ot = dsymptr(s, ot, s1, 0)
ot = dsymptr(s, ot, s2, 0)
ot = duintptr(s, ot, uint64(t.Bound))
@@ -1073,7 +1066,7 @@
s1 := dtypesym(t.Type)
ot = dcommontype(s, ot, t)
- xt = ot - 3*Widthptr
+ xt = ot - 2*Widthptr
ot = dsymptr(s, ot, s1, 0)
}
@@ -1082,7 +1075,7 @@
s1 := dtypesym(t.Type)
ot = dcommontype(s, ot, t)
- xt = ot - 3*Widthptr
+ xt = ot - 2*Widthptr
ot = dsymptr(s, ot, s1, 0)
ot = duintptr(s, ot, uint64(t.Chan))
@@ -1101,7 +1094,7 @@
}
ot = dcommontype(s, ot, t)
- xt = ot - 3*Widthptr
+ xt = ot - 2*Widthptr
ot = duint8(s, ot, uint8(obj.Bool2int(isddd)))
// two slice headers: in and out.
@@ -1140,7 +1133,7 @@
// ../../runtime/type.go:/InterfaceType
ot = dcommontype(s, ot, t)
- xt = ot - 3*Widthptr
+ xt = ot - 2*Widthptr
ot = dsymptr(s, ot, s, ot+Widthptr+2*Widthint)
ot = duintxx(s, ot, uint64(n), Widthint)
ot = duintxx(s, ot, uint64(n), Widthint)
@@ -1160,7 +1153,7 @@
s3 := dtypesym(mapbucket(t))
s4 := dtypesym(hmap(t))
ot = dcommontype(s, ot, t)
- xt = ot - 3*Widthptr
+ xt = ot - 2*Widthptr
ot = dsymptr(s, ot, s1, 0)
ot = dsymptr(s, ot, s2, 0)
ot = dsymptr(s, ot, s3, 0)
@@ -1196,7 +1189,7 @@
s1 := dtypesym(t.Type)
ot = dcommontype(s, ot, t)
- xt = ot - 3*Widthptr
+ xt = ot - 2*Widthptr
ot = dsymptr(s, ot, s1, 0)
// ../../runtime/type.go:/StructType
@@ -1210,7 +1203,7 @@
}
ot = dcommontype(s, ot, t)
- xt = ot - 3*Widthptr
+ xt = ot - 2*Widthptr
ot = dsymptr(s, ot, s, ot+Widthptr+2*Widthint)
ot = duintxx(s, ot, uint64(n), Widthint)
ot = duintxx(s, ot, uint64(n), Widthint)
