[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, 21 insertions, 0 deletions

diff --git a/llgo/third_party/gofrontend/libgo/go/net/hook_unix.go b/llgo/third_party/gofrontend/libgo/go/net/hook_unix.go
new file mode 100644
index 00000000000..361ca5980c3
--- /dev/null
+++ b/llgo/third_party/gofrontend/libgo/go/net/hook_unix.go
@@ -0,0 +1,21 @@
+// Copyright 2015 The Go Authors. All rights reserved.
+// 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
+
+package net
+
+import "syscall"
+
+var (
+	testHookDialChannel = func() {} // see golang.org/issue/5349
+
+	// Placeholders for socket system calls.
+	socketFunc        func(int, int, int) (int, error)         = syscall.Socket
+	closeFunc         func(int) error                          = syscall.Close
+	connectFunc       func(int, syscall.Sockaddr) error        = syscall.Connect
+	listenFunc        func(int, int) error                     = syscall.Listen
+	acceptFunc        func(int) (int, syscall.Sockaddr, error) = syscall.Accept
+	getsockoptIntFunc func(int, int, int) (int, error)         = syscall.GetsockoptInt
+)