[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, 29 deletions

diff --git a/llgo/third_party/gofrontend/libgo/go/os/exec_posix.go b/llgo/third_party/gofrontend/libgo/go/os/exec_posix.go
index fb9d291e664..94dd04beb23 100644
--- a/llgo/third_party/gofrontend/libgo/go/os/exec_posix.go
+++ b/llgo/third_party/gofrontend/libgo/go/os/exec_posix.go
@@ -81,33 +81,6 @@ func (p *ProcessState) sysUsage() interface{} {
 	return p.rusage
 }
 
-// Convert i to decimal string.
-func itod(i int) string {
-	if i == 0 {
-		return "0"
-	}
-
-	u := uint64(i)
-	if i < 0 {
-		u = -u
-	}
-
-	// Assemble decimal in reverse order.
-	var b [32]byte
-	bp := len(b)
-	for ; u > 0; u /= 10 {
-		bp--
-		b[bp] = byte(u%10) + '0'
-	}
-
-	if i < 0 {
-		bp--
-		b[bp] = '-'
-	}
-
-	return string(b[bp:])
-}
-
 func (p *ProcessState) String() string {
 	if p == nil {
 		return "<nil>"
@@ -116,13 +89,13 @@ func (p *ProcessState) String() string {
 	res := ""
 	switch {
 	case status.Exited():
-		res = "exit status " + itod(status.ExitStatus())
+		res = "exit status " + itoa(status.ExitStatus())
 	case status.Signaled():
 		res = "signal: " + status.Signal().String()
 	case status.Stopped():
 		res = "stop signal: " + status.StopSignal().String()
 		if status.StopSignal() == syscall.SIGTRAP && status.TrapCause() != 0 {
-			res += " (trap " + itod(status.TrapCause()) + ")"
+			res += " (trap " + itoa(status.TrapCause()) + ")"
 		}
 	case status.Continued():
 		res = "continued"