[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, 40 deletions

diff --git a/llgo/third_party/gofrontend/libgo/go/runtime/sigpanic_unix.go b/llgo/third_party/gofrontend/libgo/go/runtime/sigpanic_unix.go
deleted file mode 100644
index 68079859b06..00000000000
--- a/llgo/third_party/gofrontend/libgo/go/runtime/sigpanic_unix.go
+++ /dev/null
@@ -1,40 +0,0 @@
-// Copyright 2014 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 netbsd openbsd solaris
-
-package runtime
-
-func signame(int32) *byte
-
-func sigpanic() {
-	g := getg()
-	if !canpanic(g) {
-		gothrow("unexpected signal during runtime execution")
-	}
-
-	switch g.sig {
-	case _SIGBUS:
-		if g.sigcode0 == _BUS_ADRERR && g.sigcode1 < 0x1000 || g.paniconfault {
-			panicmem()
-		}
-		print("unexpected fault address ", hex(g.sigcode1), "\n")
-		gothrow("fault")
-	case _SIGSEGV:
-		if (g.sigcode0 == 0 || g.sigcode0 == _SEGV_MAPERR || g.sigcode0 == _SEGV_ACCERR) && g.sigcode1 < 0x1000 || g.paniconfault {
-			panicmem()
-		}
-		print("unexpected fault address ", hex(g.sigcode1), "\n")
-		gothrow("fault")
-	case _SIGFPE:
-		switch g.sigcode0 {
-		case _FPE_INTDIV:
-			panicdivide()
-		case _FPE_INTOVF:
-			panicoverflow()
-		}
-		panicfloat()
-	}
-	panic(errorString(gostringnocopy(signame(g.sig))))
-}