runtime: rename map implementation and test files to use a common prefix

Rename all map implementation and test files to use "map"
as a file name prefix instead of "hashmap" for the implementation
and "map" for the test file names.

Change-Id: I7b317c1f7a660b95c6d1f1a185866f2839e69446
Reviewed-on: https://go-review.googlesource.com/90336
Run-TryBot: Martin Möhrmann <moehrmann@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Keith Randall <khr@golang.org>

src/cmd/compile/internal/gc/reflect.go

@@ -72,7 +72,7 @@ func siglt(a, b *Sig) bool {
 // the given map type. This type is not visible to users -
 // we include only enough information to generate a correct GC
 // program for it.
-// Make sure this stays in sync with ../../../../runtime/hashmap.go!
+// Make sure this stays in sync with ../../../../runtime/map.go!
 const (
 	BUCKETSIZE = 8
 	MAXKEYSIZE = 128
@@ -156,7 +156,7 @@ func bmap(t *types.Type) *types.Type {
 	// buckets can be marked as having no pointers.
 	// Arrange for the bucket to have no pointers by changing
 	// the type of the overflow field to uintptr in this case.
-	// See comment on hmap.overflow in ../../../../runtime/hashmap.go.
+	// See comment on hmap.overflow in ../../../../runtime/map.go.
 	otyp := types.NewPtr(bucket)
 	if !types.Haspointers(valtype) && !types.Haspointers(keytype) {
 		otyp = types.Types[TUINTPTR]
@@ -226,7 +226,7 @@ func bmap(t *types.Type) *types.Type {
 }
 
 // hmap builds a type representing a Hmap structure for the given map type.
-// Make sure this stays in sync with ../../../../runtime/hashmap.go.
+// Make sure this stays in sync with ../../../../runtime/map.go.
 func hmap(t *types.Type) *types.Type {
 	if t.MapType().Hmap != nil {
 		return t.MapType().Hmap
@@ -246,7 +246,7 @@ func hmap(t *types.Type) *types.Type {
 	//    nevacuate  uintptr
 	//    extra      unsafe.Pointer // *mapextra
 	// }
-	// must match ../../../../runtime/hashmap.go:hmap.
+	// must match ../../../../runtime/map.go:hmap.
 	fields := []*types.Field{
 		makefield("count", types.Types[TINT]),
 		makefield("flags", types.Types[TUINT8]),
@@ -276,7 +276,7 @@ func hmap(t *types.Type) *types.Type {
 }
 
 // hiter builds a type representing an Hiter structure for the given map type.
-// Make sure this stays in sync with ../../../../runtime/hashmap.go.
+// Make sure this stays in sync with ../../../../runtime/map.go.
 func hiter(t *types.Type) *types.Type {
 	if t.MapType().Hiter != nil {
 		return t.MapType().Hiter
@@ -303,7 +303,7 @@ func hiter(t *types.Type) *types.Type {
 	//    bucket      uintptr
 	//    checkBucket uintptr
 	// }
-	// must match ../../../../runtime/hashmap.go:hiter.
+	// must match ../../../../runtime/map.go:hiter.
 	fields := []*types.Field{
 		makefield("key", types.NewPtr(t.Key())), // Used in range.go for TMAP.
 		makefield("val", types.NewPtr(t.Val())), // Used in range.go for TMAP.

src/cmd/compile/internal/gc/walk.go

@@ -804,7 +804,7 @@ opswitch:
 		//   a = *var
 		a := n.List.First()
 
-		if w := t.Val().Width; w <= 1024 { // 1024 must match ../../../../runtime/hashmap.go:maxZero
+		if w := t.Val().Width; w <= 1024 { // 1024 must match ../../../../runtime/map.go:maxZero
 			fn := mapfn(mapaccess2[fast], t)
 			r = mkcall1(fn, fn.Type.Results(), init, typename(t), r.Left, key)
 		} else {
@@ -1178,7 +1178,7 @@ opswitch:
 				key = nod(OADDR, key, nil)
 			}
 
-			if w := t.Val().Width; w <= 1024 { // 1024 must match ../../../../runtime/hashmap.go:maxZero
+			if w := t.Val().Width; w <= 1024 { // 1024 must match ../../../../runtime/map.go:maxZero
 				n = mkcall1(mapfn(mapaccess1[fast], t), types.NewPtr(t.Val()), init, typename(t), map_, key)
 			} else {
 				z := zeroaddr(w)
@@ -2824,7 +2824,7 @@ var mapassign = mkmapnames("mapassign", "ptr")
 var mapdelete = mkmapnames("mapdelete", "")
 
 func mapfast(t *types.Type) int {
-	// Check ../../runtime/hashmap.go:maxValueSize before changing.
+	// Check ../../runtime/map.go:maxValueSize before changing.
 	if t.Val().Width > 128 {
 		return mapslow
 	}

src/reflect/type.go

@@ -2154,7 +2154,7 @@ func needKeyUpdate(t *rtype) bool {
 	}
 }
 
-// Make sure these routines stay in sync with ../../runtime/hashmap.go!
+// Make sure these routines stay in sync with ../../runtime/map.go!
 // These types exist only for GC, so we only fill out GC relevant info.
 // Currently, that's just size and the GC program. We also fill in string
 // for possible debugging use.
@@ -2165,7 +2165,7 @@ const (
 )
 
 func bucketOf(ktyp, etyp *rtype) *rtype {
-	// See comment on hmap.overflow in ../runtime/hashmap.go.
+	// See comment on hmap.overflow in ../runtime/map.go.
 	var kind uint8
 	if ktyp.kind&kindNoPointers != 0 && etyp.kind&kindNoPointers != 0 &&
 		ktyp.size <= maxKeySize && etyp.size <= maxValSize {

src/runtime/map_test.go

@@ -620,7 +620,7 @@ func TestMapBuckets(t *testing.T) {
 	// have a nil bucket pointer due to starting with preallocated buckets
 	// on the stack. Escaping maps start with a non-nil bucket pointer if
 	// hint size is above bucketCnt and thereby have more than one bucket.
-	// These tests depend on bucketCnt and loadFactor* in hashmap.go.
+	// These tests depend on bucketCnt and loadFactor* in map.go.
 	t.Run("mapliteral", func(t *testing.T) {
 		for _, tt := range mapBucketTests {
 			localMap := map[int]int{}