[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, 0 insertions, 3 deletions

diff --git a/llgo/third_party/gofrontend/libgo/go/runtime/mfinal_test.go b/llgo/third_party/gofrontend/libgo/go/runtime/mfinal_test.go
index 512a14e21aa..e534496cf6a 100644
--- a/llgo/third_party/gofrontend/libgo/go/runtime/mfinal_test.go
+++ b/llgo/third_party/gofrontend/libgo/go/runtime/mfinal_test.go
@@ -178,9 +178,6 @@ func adjChunks() (*objtype, *objtype) {
 
 // Make sure an empty slice on the stack doesn't pin the next object in memory.
 func TestEmptySlice(t *testing.T) {
-	if true { // disable until bug 7564 is fixed.
-		return
-	}
 	if runtime.Compiler == "gccgo" {
 		t.Skip("skipping for gccgo")
 	}