[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, 2 insertions, 9 deletions

diff --git a/llgo/third_party/gofrontend/libgo/runtime/go-new.c b/llgo/third_party/gofrontend/libgo/runtime/go-new.c
index dad6efb30c0..01bc2af3121 100644
--- a/llgo/third_party/gofrontend/libgo/runtime/go-new.c
+++ b/llgo/third_party/gofrontend/libgo/runtime/go-new.c
@@ -8,19 +8,12 @@
 #include "runtime.h"
 #include "arch.h"
 #include "malloc.h"
+#include "go-type.h"
 
 void *
 __go_new (const struct __go_type_descriptor *td, uintptr_t size)
 {
   return runtime_mallocgc (size,
 			   (uintptr) td | TypeInfo_SingleObject,
-			   0);
-}
-
-void *
-__go_new_nopointers (const struct __go_type_descriptor *td,  uintptr_t size)
-{
-  return runtime_mallocgc (size,
-			   (uintptr) td | TypeInfo_SingleObject,
-			   FlagNoScan);
+			   td->__code & GO_NO_POINTERS ? FlagNoScan : 0);
 }