[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, 101 deletions

diff --git a/llgo/third_party/gofrontend/libgo/go/runtime/netpoll_kqueue.go b/llgo/third_party/gofrontend/libgo/go/runtime/netpoll_kqueue.go
deleted file mode 100644
index d6d55b97b8d..00000000000
--- a/llgo/third_party/gofrontend/libgo/go/runtime/netpoll_kqueue.go
+++ /dev/null
@@ -1,101 +0,0 @@
-// Copyright 2013 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 netbsd openbsd
-
-package runtime
-
-// Integrated network poller (kqueue-based implementation).
-
-import "unsafe"
-
-func kqueue() int32
-
-//go:noescape
-func kevent(kq int32, ch *keventt, nch int32, ev *keventt, nev int32, ts *timespec) int32
-func closeonexec(fd int32)
-
-var (
-	kq             int32 = -1
-	netpolllasterr int32
-)
-
-func netpollinit() {
-	kq = kqueue()
-	if kq < 0 {
-		println("netpollinit: kqueue failed with", -kq)
-		gothrow("netpollinit: kqueue failed")
-	}
-	closeonexec(kq)
-}
-
-func netpollopen(fd uintptr, pd *pollDesc) int32 {
-	// Arm both EVFILT_READ and EVFILT_WRITE in edge-triggered mode (EV_CLEAR)
-	// for the whole fd lifetime.  The notifications are automatically unregistered
-	// when fd is closed.
-	var ev [2]keventt
-	*(*uintptr)(unsafe.Pointer(&ev[0].ident)) = fd
-	ev[0].filter = _EVFILT_READ
-	ev[0].flags = _EV_ADD | _EV_CLEAR
-	ev[0].fflags = 0
-	ev[0].data = 0
-	ev[0].udata = (*byte)(unsafe.Pointer(pd))
-	ev[1] = ev[0]
-	ev[1].filter = _EVFILT_WRITE
-	n := kevent(kq, &ev[0], 2, nil, 0, nil)
-	if n < 0 {
-		return -n
-	}
-	return 0
-}
-
-func netpollclose(fd uintptr) int32 {
-	// Don't need to unregister because calling close()
-	// on fd will remove any kevents that reference the descriptor.
-	return 0
-}
-
-func netpollarm(pd *pollDesc, mode int) {
-	gothrow("unused")
-}
-
-// Polls for ready network connections.
-// Returns list of goroutines that become runnable.
-func netpoll(block bool) (gp *g) {
-	if kq == -1 {
-		return
-	}
-	var tp *timespec
-	var ts timespec
-	if !block {
-		tp = &ts
-	}
-	var events [64]keventt
-retry:
-	n := kevent(kq, nil, 0, &events[0], int32(len(events)), tp)
-	if n < 0 {
-		if n != -_EINTR && n != netpolllasterr {
-			netpolllasterr = n
-			println("runtime: kevent on fd", kq, "failed with", -n)
-		}
-		goto retry
-	}
-	for i := 0; i < int(n); i++ {
-		ev := &events[i]
-		var mode int32
-		if ev.filter == _EVFILT_READ {
-			mode += 'r'
-		}
-		if ev.filter == _EVFILT_WRITE {
-			mode += 'w'
-		}
-		if mode != 0 {
-			netpollready((**g)(noescape(unsafe.Pointer(&gp))), (*pollDesc)(unsafe.Pointer(ev.udata)), mode)
-		}
-	}
-	if block && gp == nil {
-		goto retry
-	}
-	return gp
-}