This libgo patch by Eric Fang fixes TestCallersNilPointerPanic when
using GoLLVM.  The expected result of TestCallersNilPointerPanic has
changed in GoLLVM.  This change makes some elements of the expected
result optional so that this test passes in both gccgo and GoLLVM.
Bootstrapped and ran Go testsuite on x86_64-pc-linux-gnu.  Committed
to master.

Ian
diff --git a/gcc/go/gofrontend/MERGE b/gcc/go/gofrontend/MERGE
index 939ba7c8929..02f6746cf6b 100644
--- a/gcc/go/gofrontend/MERGE
+++ b/gcc/go/gofrontend/MERGE
@@ -1,4 +1,4 @@
-8645632618262d1661ece0c9e6fe9e04c6e3a878
+876bdf3df3bb33dbf1414237d84be5da32a48082
 
 The first line of this file holds the git revision number of the last
 merge done from the gofrontend repository.
diff --git a/libgo/go/runtime/callers_test.go b/libgo/go/runtime/callers_test.go
index 26a6f3a73fc..1fc7f861894 100644
--- a/libgo/go/runtime/callers_test.go
+++ b/libgo/go/runtime/callers_test.go
@@ -67,7 +67,7 @@ func testCallers(t *testing.T, pcs []uintptr, pan bool) {
        }
 }
 
-func testCallersEqual(t *testing.T, pcs []uintptr, want []string) {
+func testCallersEqual(t *testing.T, pcs []uintptr, want []string, ignore 
map[string]struct{}) {
        got := make([]string, 0, len(want))
 
        frames := runtime.CallersFrames(pcs)
@@ -76,7 +76,9 @@ func testCallersEqual(t *testing.T, pcs []uintptr, want 
[]string) {
                if !more || len(got) >= len(want) {
                        break
                }
-               got = append(got, frame.Function)
+               if _, ok := ignore[frame.Function]; !ok {
+                       got = append(got, frame.Function)
+               }
        }
        if !reflect.DeepEqual(want, got) {
                t.Fatalf("wanted %v, got %v", want, got)
@@ -106,7 +108,7 @@ func TestCallersPanic(t *testing.T) {
                pcs := make([]uintptr, 20)
                pcs = pcs[:runtime.Callers(0, pcs)]
                testCallers(t, pcs, true)
-               testCallersEqual(t, pcs, want)
+               testCallersEqual(t, pcs, want, nil)
        }()
        f1(true)
 }
@@ -128,7 +130,7 @@ func TestCallersDoublePanic(t *testing.T) {
                        if recover() == nil {
                                t.Fatal("did not panic")
                        }
-                       testCallersEqual(t, pcs, want)
+                       testCallersEqual(t, pcs, want, nil)
                }()
                if recover() == nil {
                        t.Fatal("did not panic")
@@ -149,7 +151,7 @@ func TestCallersAfterRecovery(t *testing.T) {
        defer func() {
                pcs := make([]uintptr, 20)
                pcs = pcs[:runtime.Callers(0, pcs)]
-               testCallersEqual(t, pcs, want)
+               testCallersEqual(t, pcs, want, nil)
        }()
        defer func() {
                if recover() == nil {
@@ -177,7 +179,7 @@ func TestCallersAbortedPanic(t *testing.T) {
                // recovered, there is no remaining panic on the stack.
                pcs := make([]uintptr, 20)
                pcs = pcs[:runtime.Callers(0, pcs)]
-               testCallersEqual(t, pcs, want)
+               testCallersEqual(t, pcs, want, nil)
        }()
        defer func() {
                r := recover()
@@ -208,7 +210,7 @@ func TestCallersAbortedPanic2(t *testing.T) {
        defer func() {
                pcs := make([]uintptr, 20)
                pcs = pcs[:runtime.Callers(0, pcs)]
-               testCallersEqual(t, pcs, want)
+               testCallersEqual(t, pcs, want, nil)
        }()
        func() {
                defer func() {
@@ -233,10 +235,16 @@ func TestCallersNilPointerPanic(t *testing.T) {
        want := []string{"runtime.Callers", 
"runtime_test.TestCallersNilPointerPanic.func1",
                "runtime.gopanic", "runtime.panicmem", "runtime.sigpanic",
                "runtime_test.TestCallersNilPointerPanic"}
+       ign := make(map[string]struct{})
        if runtime.Compiler == "gccgo" {
+               // The expected results of gollvm and gccgo are slightly 
different, the result
+               // of gccgo does not contain tRunner, and the result of gollvm 
does not contain
+               // sigpanic. Make these two elementes optional to pass both of 
gollvm and gccgo.
                want = []string{"runtime.Callers", 
"runtime_test.TestCallersNilPointerPanic..func1",
-                       "runtime.gopanic", "runtime.panicmem", 
"runtime.sigpanic",
+                       "runtime.gopanic", "runtime.panicmem",
                        "runtime_test.TestCallersNilPointerPanic"}
+               ign["runtime.sigpanic"] = struct{}{}
+               ign["testing.tRunner"] = struct{}{}
        }
 
        defer func() {
@@ -245,7 +253,7 @@ func TestCallersNilPointerPanic(t *testing.T) {
                }
                pcs := make([]uintptr, 20)
                pcs = pcs[:runtime.Callers(0, pcs)]
-               testCallersEqual(t, pcs, want)
+               testCallersEqual(t, pcs, want, ign)
        }()
        var p *int
        if *p == 3 {
@@ -271,7 +279,7 @@ func TestCallersDivZeroPanic(t *testing.T) {
                }
                pcs := make([]uintptr, 20)
                pcs = pcs[:runtime.Callers(0, pcs)]
-               testCallersEqual(t, pcs, want)
+               testCallersEqual(t, pcs, want, nil)
        }()
        var n int
        if 5/n == 1 {
@@ -298,7 +306,7 @@ func TestCallersDeferNilFuncPanic(t *testing.T) {
                }
                pcs := make([]uintptr, 20)
                pcs = pcs[:runtime.Callers(0, pcs)]
-               testCallersEqual(t, pcs, want)
+               testCallersEqual(t, pcs, want, nil)
                if state == 1 {
                        t.Fatal("nil defer func panicked at defer time rather 
than function exit time")
                }
@@ -328,7 +336,7 @@ func TestCallersDeferNilFuncPanicWithLoop(t *testing.T) {
                }
                pcs := make([]uintptr, 20)
                pcs = pcs[:runtime.Callers(0, pcs)]
-               testCallersEqual(t, pcs, want)
+               testCallersEqual(t, pcs, want, nil)
                if state == 1 {
                        t.Fatal("nil defer func panicked at defer time rather 
than function exit time")
                }

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