runtime: inline and remove eqtype

    
    Now that type equality is just a pointer equality, write it
    inlined and remove the eqtype function.
    
    Reviewed-on: https://go-review.googlesource.com/c/gofrontend/+/182978

From-SVN: r272578

gcc/go/gofrontend/MERGE

-5bca69ab3b41df535193474baecc3a8a4c0b3dbe
+fdf0af774aabb31ba8a62f358b7b40dfe8b35da9
 
 The first line of this file holds the git revision number of the last
 merge done from the gofrontend repository.

libgo/go/runtime/alg.go

@@ -205,7 +205,7 @@ func nilinterequal(p, q unsafe.Pointer) bool {
 }
 func efaceeq(x, y eface) bool {
 	t := x._type
-	if !eqtype(t, y._type) {
+	if t != y._type {
 		return false
 	}
 	if t == nil {
@@ -229,7 +229,7 @@ func ifaceeq(x, y iface) bool {
 		return false
 	}
 	t := *(**_type)(xtab)
-	if !eqtype(t, *(**_type)(y.tab)) {
+	if t != *(**_type)(y.tab) {
 		return false
 	}
 	eq := t.equalfn
@@ -247,7 +247,7 @@ func ifacevaleq(x iface, t *_type, p unsafe.Pointer) bool {
 		return false
 	}
 	xt := *(**_type)(x.tab)
-	if !eqtype(xt, t) {
+	if xt != t {
 		return false
 	}
 	eq := t.equalfn
@@ -268,7 +268,7 @@ func ifaceefaceeq(x iface, y eface) bool {
 		return false
 	}
 	xt := *(**_type)(x.tab)
-	if !eqtype(xt, y._type) {
+	if xt != y._type {
 		return false
 	}
 	eq := xt.equalfn
@@ -285,7 +285,7 @@ func efacevaleq(x eface, t *_type, p unsafe.Pointer) bool {
 	if x._type == nil {
 		return false
 	}
-	if !eqtype(x._type, t) {
+	if x._type != t {
 		return false
 	}
 	eq := t.equalfn

libgo/go/runtime/iface.go

@@ -233,7 +233,7 @@ func (m *itab) init() string {
 			ri++
 		}
 
-		if !eqtype(lhsMethod.typ, rhsMethod.mtyp) {
+		if lhsMethod.typ != rhsMethod.mtyp {
 			m.methods[1] = nil
 			return *lhsMethod.name
 		}
@@ -406,7 +406,7 @@ func ifaceI2I2(inter *_type, i iface) (iface, bool) {
 
 // Convert an empty interface to a pointer non-interface type.
 func ifaceE2T2P(t *_type, e eface) (unsafe.Pointer, bool) {
-	if !eqtype(t, e._type) {
+	if t != e._type {
 		return nil, false
 	} else {
 		return e.data, true
@@ -415,7 +415,7 @@ func ifaceE2T2P(t *_type, e eface) (unsafe.Pointer, bool) {
 
 // Convert a non-empty interface to a pointer non-interface type.
 func ifaceI2T2P(t *_type, i iface) (unsafe.Pointer, bool) {
-	if i.tab == nil || !eqtype(t, *(**_type)(i.tab)) {
+	if i.tab == nil || t != *(**_type)(i.tab) {
 		return nil, false
 	} else {
 		return i.data, true
@@ -424,7 +424,7 @@ func ifaceI2T2P(t *_type, i iface) (unsafe.Pointer, bool) {
 
 // Convert an empty interface to a non-pointer non-interface type.
 func ifaceE2T2(t *_type, e eface, ret unsafe.Pointer) bool {
-	if !eqtype(t, e._type) {
+	if t != e._type {
 		typedmemclr(t, ret)
 		return false
 	} else {
@@ -439,7 +439,7 @@ func ifaceE2T2(t *_type, e eface, ret unsafe.Pointer) bool {
 
 // Convert a non-empty interface to a non-pointer non-interface type.
 func ifaceI2T2(t *_type, i iface, ret unsafe.Pointer) bool {
-	if i.tab == nil || !eqtype(t, *(**_type)(i.tab)) {
+	if i.tab == nil || t != *(**_type)(i.tab) {
 		typedmemclr(t, ret)
 		return false
 	} else {
@@ -485,7 +485,7 @@ func ifaceT2Ip(to, from *_type) bool {
 			ri++
 		}
 
-		if !eqtype(fromMethod.mtyp, toMethod.typ) {
+		if fromMethod.mtyp != toMethod.typ {
 			return false
 		}
 

libgo/go/runtime/type.go

@@ -48,11 +48,6 @@ func (t *_type) pkgpath() string {
 	return ""
 }
 
-// Return whether two type descriptors are equal.
-func eqtype(t1, t2 *_type) bool {
-	return t1 == t2
-}
-
 type method struct {
 	name    *string
 	pkgPath *string