Index: gcc/go/gofrontend/MERGE
===================================================================
--- gcc/go/gofrontend/MERGE	(revision 249556)
+++ gcc/go/gofrontend/MERGE	(working copy)
@@ -1,4 +1,4 @@
-e017833e4ce4a3bc3ba02eac4351b15c86157ec0
+a81079a81b63714221674f07d13bedc768092f27
 
 The first line of this file holds the git revision number of the last
 merge done from the gofrontend repository.
Index: libgo/go/runtime/crash_cgo_test.go
===================================================================
--- libgo/go/runtime/crash_cgo_test.go	(revision 249205)
+++ libgo/go/runtime/crash_cgo_test.go	(working copy)
@@ -251,6 +251,9 @@ func TestCgoCrashTraceback(t *testing.T)
 	if runtime.GOOS != "linux" || runtime.GOARCH != "amd64" {
 		t.Skipf("not yet supported on %s/%s", runtime.GOOS, runtime.GOARCH)
 	}
+	if runtime.Compiler == "gccgo" {
+		t.Skip("gccgo does not have SetCgoTraceback")
+	}
 	got := runTestProg(t, "testprogcgo", "CrashTraceback")
 	for i := 1; i <= 3; i++ {
 		if !strings.Contains(got, fmt.Sprintf("cgo symbolizer:%d", i)) {
@@ -261,6 +264,9 @@ func TestCgoCrashTraceback(t *testing.T)
 
 func TestCgoTracebackContext(t *testing.T) {
 	t.Parallel()
+	if runtime.Compiler == "gccgo" {
+		t.Skip("gccgo does not have SetCgoTraceback")
+	}
 	got := runTestProg(t, "testprogcgo", "TracebackContext")
 	want := "OK\n"
 	if got != want {
@@ -273,6 +279,9 @@ func testCgoPprof(t *testing.T, buildArg
 	if runtime.GOOS != "linux" || runtime.GOARCH != "amd64" {
 		t.Skipf("not yet supported on %s/%s", runtime.GOOS, runtime.GOARCH)
 	}
+	if runtime.Compiler == "gccgo" {
+		t.Skip("gccgo does not have SetCgoTraceback")
+	}
 	testenv.MustHaveGoRun(t)
 
 	exe, err := buildTestProg(t, "testprogcgo", buildArg)
@@ -332,6 +341,9 @@ func TestRaceProf(t *testing.T) {
 	if runtime.GOOS != "linux" || runtime.GOARCH != "amd64" {
 		t.Skipf("not yet supported on %s/%s", runtime.GOOS, runtime.GOARCH)
 	}
+	if runtime.Compiler == "gccgo" {
+		t.Skip("gccgo does not have SetCgoTraceback")
+	}
 
 	testenv.MustHaveGoRun(t)
 
Index: libgo/go/runtime/crash_test.go
===================================================================
--- libgo/go/runtime/crash_test.go	(revision 249205)
+++ libgo/go/runtime/crash_test.go	(working copy)
@@ -225,6 +225,9 @@ func TestGoexitDeadlock(t *testing.T) {
 }
 
 func TestStackOverflow(t *testing.T) {
+	if runtime.Compiler == "gccgo" {
+		t.Skip("gccgo does not do stack overflow checking")
+	}
 	output := runTestProg(t, "testprog", "StackOverflow")
 	want := "runtime: goroutine stack exceeds 1474560-byte limit\nfatal error: stack overflow"
 	if !strings.HasPrefix(output, want) {
@@ -302,7 +305,7 @@ func TestNoHelperGoroutines(t *testing.T
 
 func TestBreakpoint(t *testing.T) {
 	output := runTestProg(t, "testprog", "Breakpoint")
-	want := "runtime.Breakpoint()"
+	want := "runtime.Breakpoint"
 	if !strings.Contains(output, want) {
 		t.Fatalf("output:\n%s\n\nwant output containing: %s", output, want)
 	}
@@ -419,8 +422,16 @@ func TestPanicTraceback(t *testing.T) {
 
 	// Check functions in the traceback.
 	fns := []string{"main.pt1.func1", "panic", "main.pt2.func1", "panic", "main.pt2", "main.pt1"}
+	if runtime.Compiler == "gccgo" {
+		fns = []string{"main.$nested", "panic", "main.$nested", "panic", "main.pt2", "main.pt1"}
+	}
 	for _, fn := range fns {
-		re := regexp.MustCompile(`(?m)^` + regexp.QuoteMeta(fn) + `\(.*\n`)
+		var re *regexp.Regexp
+		if runtime.Compiler != "gccgo" {
+			re = regexp.MustCompile(`(?m)^` + regexp.QuoteMeta(fn) + `\(.*\n`)
+		} else {
+			re = regexp.MustCompile(`(?m)^` + regexp.QuoteMeta(fn) + `.*\n`)
+		}
 		idx := re.FindStringIndex(output)
 		if idx == nil {
 			t.Fatalf("expected %q function in traceback:\n%s", fn, output)
@@ -454,6 +465,9 @@ func TestPanicLoop(t *testing.T) {
 
 func TestMemPprof(t *testing.T) {
 	testenv.MustHaveGoRun(t)
+	if runtime.Compiler == "gccgo" {
+		t.Skip("gccgo may not have the pprof tool")
+	}
 
 	exe, err := buildTestProg(t, "testprog")
 	if err != nil {
Index: libgo/go/runtime/crash_unix_test.go
===================================================================
--- libgo/go/runtime/crash_unix_test.go	(revision 249205)
+++ libgo/go/runtime/crash_unix_test.go	(working copy)
@@ -105,7 +105,7 @@ func TestCrashDumpsAllThreads(t *testing
 	// Before https://golang.org/cl/2811 running threads would say
 	// "goroutine running on other thread; stack unavailable".
 	out = outbuf.Bytes()
-	n := bytes.Count(out, []byte("main.loop("))
+	n := bytes.Count(out, []byte("main.loop"))
 	if n != 4 {
 		t.Errorf("found %d instances of main.loop; expected 4", n)
 		t.Logf("%s", out)
