[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, 3 insertions, 5 deletions

diff --git a/llgo/third_party/gofrontend/libgo/go/net/cgo_bsd.go b/llgo/third_party/gofrontend/libgo/go/net/cgo_bsd.go
index ce46f2e8c3a..ae1054b39ad 100644
--- a/llgo/third_party/gofrontend/libgo/go/net/cgo_bsd.go
+++ b/llgo/third_party/gofrontend/libgo/go/net/cgo_bsd.go
@@ -2,8 +2,8 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-// +build !netgo
-// +build darwin dragonfly freebsd solaris
+// +build cgo,!netgo
+// +build darwin dragonfly freebsd
 
 package net
 
@@ -13,6 +13,4 @@ package net
 
 import "syscall"
 
-func cgoAddrInfoFlags() int {
-	return (syscall.AI_CANONNAME | syscall.AI_V4MAPPED | syscall.AI_ALL) & syscall.AI_MASK
-}
+const cgoAddrInfoFlags = (syscall.AI_CANONNAME | syscall.AI_V4MAPPED | syscall.AI_ALL) & syscall.AI_MASK