[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, 7 insertions, 1 deletions

diff --git a/llgo/third_party/gofrontend/libgo/go/time/zoneinfo_unix.go b/llgo/third_party/gofrontend/libgo/go/time/zoneinfo_unix.go
index 3fe8e55795c..5fc669e478d 100644
--- a/llgo/third_party/gofrontend/libgo/go/time/zoneinfo_unix.go
+++ b/llgo/third_party/gofrontend/libgo/go/time/zoneinfo_unix.go
@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-// +build darwin dragonfly freebsd linux nacl netbsd openbsd solaris
+// +build darwin,386 darwin,amd64 dragonfly freebsd linux nacl netbsd openbsd solaris
 
 // Parse "zoneinfo" time zone file.
 // This is a fairly standard file format used on OS X, Linux, BSD, Sun, and others.
@@ -70,11 +70,17 @@ func initLocal() {
 }
 
 func loadLocation(name string) (*Location, error) {
+	var firstErr error
 	for _, zoneDir := range zoneDirs {
 		if z, err := loadZoneFile(zoneDir, name); err == nil {
 			z.name = name
 			return z, nil
+		} else if firstErr == nil && !isNotExist(err) {
+			firstErr = err
 		}
 	}
+	if firstErr != nil {
+		return nil, firstErr
+	}
 	return nil, errors.New("unknown time zone " + name)
 }