[llgo] Roll gofrontend forward

Switch gofrontend to using go.googlesource.com, and
update to 81eb6a3f425b2158c67ee32c0cc973a72ce9d6be.

There are various changes required to update to the
go 1.5 runtime:

typemap.go is changed to accommodate the change in representation for equal/hash algorithms, and the removal of the zero value/type.
CMakeLists.txt is updated to add the build tree to the package search path, so internal packages, which are not installed, are found.
various files changes due to removal of __go_new_nopointers; the same change as in D11863, but with NoUnwindAttribute added to the added runtime functions which are called with "callOnly".
minor cleanups in ssa.go while investigating issues with unwinding/panic handling.

Differential Revisision: http://reviews.llvm.org/D15188

llvm-svn: 263536

1 files changed, 12 insertions, 4 deletions

diff --git a/llgo/third_party/gofrontend/libgo/go/os/path_test.go b/llgo/third_party/gofrontend/libgo/go/os/path_test.go
index 6f24a43132a..f9853810c6f 100644
--- a/llgo/third_party/gofrontend/libgo/go/os/path_test.go
+++ b/llgo/third_party/gofrontend/libgo/go/os/path_test.go
@@ -13,6 +13,8 @@ import (
 	"testing"
 )
 
+var isReadonlyError = func(error) bool { return false }
+
 func TestMkdirAll(t *testing.T) {
 	tmpDir := TempDir()
 	path := tmpDir + "/_TestMkdirAll_/dir/./dir2"
@@ -205,16 +207,22 @@ func TestMkdirAllAtSlash(t *testing.T) {
 	switch runtime.GOOS {
 	case "android", "plan9", "windows":
 		t.Skipf("skipping on %s", runtime.GOOS)
+	case "darwin":
+		switch runtime.GOARCH {
+		case "arm", "arm64":
+			t.Skipf("skipping on darwin/%s, mkdir returns EPERM", runtime.GOARCH)
+		}
 	}
 	RemoveAll("/_go_os_test")
-	err := MkdirAll("/_go_os_test/dir", 0777)
+	const dir = "/_go_os_test/dir"
+	err := MkdirAll(dir, 0777)
 	if err != nil {
 		pathErr, ok := err.(*PathError)
 		// common for users not to be able to write to /
-		if ok && pathErr.Err == syscall.EACCES {
-			return
+		if ok && (pathErr.Err == syscall.EACCES || isReadonlyError(pathErr.Err)) {
+			t.Skipf("could not create %v: %v", dir, err)
 		}
-		t.Fatalf(`MkdirAll "/_go_os_test/dir": %v`, err)
+		t.Fatalf(`MkdirAll "/_go_os_test/dir": %v, %s`, err, pathErr.Err)
 	}
 	RemoveAll("/_go_os_test")
 }