[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, 1 insertions, 9 deletions

diff --git a/llgo/third_party/gofrontend/libgo/go/os/file_posix.go b/llgo/third_party/gofrontend/libgo/go/os/file_posix.go
index fbb3b5e4d81..6d8076fdf5c 100644
--- a/llgo/third_party/gofrontend/libgo/go/os/file_posix.go
+++ b/llgo/third_party/gofrontend/libgo/go/os/file_posix.go
@@ -28,14 +28,6 @@ func Readlink(name string) (string, error) {
 	}
 }
 
-func rename(oldname, newname string) error {
-	e := syscall.Rename(oldname, newname)
-	if e != nil {
-		return &LinkError{"rename", oldname, newname, e}
-	}
-	return nil
-}
-
 // syscallMode returns the syscall-specific mode bits from Go's portable mode bits.
 func syscallMode(i FileMode) (o uint32) {
 	o |= uint32(i.Perm())
@@ -122,7 +114,7 @@ func (f *File) Truncate(size int64) error {
 // Sync commits the current contents of the file to stable storage.
 // Typically, this means flushing the file system's in-memory copy
 // of recently written data to disk.
-func (f *File) Sync() (err error) {
+func (f *File) Sync() error {
 	if f == nil {
 		return ErrInvalid
 	}