Update to current Go library.

From-SVN: r171732

3 files changed, 18 insertions, 17 deletions

diff --git a/libgo/go/bytes/buffer_test.go b/libgo/go/bytes/buffer_test.go
index 56a2d92..14f9501 100644
--- a/libgo/go/bytes/buffer_test.go
+++ b/libgo/go/bytes/buffer_test.go
@@ -178,7 +178,11 @@ func TestBasicOperations(t *testing.T) {
 
 func TestLargeStringWrites(t *testing.T) {
 	var buf Buffer
-	for i := 3; i < 30; i += 3 {
+	limit := 30
+	if testing.Short() {
+		limit = 9
+	}
+	for i := 3; i < limit; i += 3 {
 		s := fillString(t, "TestLargeWrites (1)", &buf, "", 5, data)
 		empty(t, "TestLargeStringWrites (2)", &buf, s, make([]byte, len(data)/i))
 	}
@@ -188,7 +192,11 @@ func TestLargeStringWrites(t *testing.T) {
 
 func TestLargeByteWrites(t *testing.T) {
 	var buf Buffer
-	for i := 3; i < 30; i += 3 {
+	limit := 30
+	if testing.Short() {
+		limit = 9
+	}
+	for i := 3; i < limit; i += 3 {
 		s := fillBytes(t, "TestLargeWrites (1)", &buf, "", 5, bytes)
 		empty(t, "TestLargeByteWrites (2)", &buf, s, make([]byte, len(data)/i))
 	}
diff --git a/libgo/go/bytes/bytes.go b/libgo/go/bytes/bytes.go
index bfe2ef3..c12a135 100644
--- a/libgo/go/bytes/bytes.go
+++ b/libgo/go/bytes/bytes.go
@@ -293,20 +293,10 @@ func Join(a [][]byte, sep []byte) []byte {
 	}
 
 	b := make([]byte, n)
-	bp := 0
-	for i := 0; i < len(a); i++ {
-		s := a[i]
-		for j := 0; j < len(s); j++ {
-			b[bp] = s[j]
-			bp++
-		}
-		if i+1 < len(a) {
-			s = sep
-			for j := 0; j < len(s); j++ {
-				b[bp] = s[j]
-				bp++
-			}
-		}
+	bp := copy(b, a[0])
+	for _, s := range a[1:] {
+		bp += copy(b[bp:], sep)
+		bp += copy(b[bp:], s)
 	}
 	return b
 }
diff --git a/libgo/go/bytes/bytes_test.go b/libgo/go/bytes/bytes_test.go
index 063686e..4ce291a 100644
--- a/libgo/go/bytes/bytes_test.go
+++ b/libgo/go/bytes/bytes_test.go
@@ -201,7 +201,10 @@ func TestIndexByte(t *testing.T) {
 
 // test a larger buffer with different sizes and alignments
 func TestIndexByteBig(t *testing.T) {
-	const n = 1024
+	var n = 1024
+	if testing.Short() {
+		n = 128
+	}
 	b := make([]byte, n)
 	for i := 0; i < n; i++ {
 		// different start alignments