[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, 19 insertions, 7 deletions

diff --git a/llgo/third_party/gofrontend/libgo/go/testing/quick/quick.go b/llgo/third_party/gofrontend/libgo/go/testing/quick/quick.go
index 909c65f788b..13c56cdf488 100644
--- a/llgo/third_party/gofrontend/libgo/go/testing/quick/quick.go
+++ b/llgo/third_party/gofrontend/libgo/go/testing/quick/quick.go
@@ -102,12 +102,16 @@ func Value(t reflect.Type, rand *rand.Rand) (value reflect.Value, ok bool) {
 			v.SetMapIndex(key, value)
 		}
 	case reflect.Ptr:
-		elem, ok := Value(concrete.Elem(), rand)
-		if !ok {
-			return reflect.Value{}, false
+		if rand.Intn(complexSize) == 0 {
+			v.Set(reflect.Zero(concrete)) // Generate nil pointer.
+		} else {
+			elem, ok := Value(concrete.Elem(), rand)
+			if !ok {
+				return reflect.Value{}, false
+			}
+			v.Set(reflect.New(concrete.Elem()))
+			v.Elem().Set(elem)
 		}
-		v.Set(reflect.New(concrete.Elem()))
-		v.Elem().Set(elem)
 	case reflect.Slice:
 		numElems := rand.Intn(complexSize)
 		v.Set(reflect.MakeSlice(concrete, numElems, numElems))
@@ -118,6 +122,14 @@ func Value(t reflect.Type, rand *rand.Rand) (value reflect.Value, ok bool) {
 			}
 			v.Index(i).Set(elem)
 		}
+	case reflect.Array:
+		for i := 0; i < v.Len(); i++ {
+			elem, ok := Value(concrete.Elem(), rand)
+			if !ok {
+				return reflect.Value{}, false
+			}
+			v.Index(i).Set(elem)
+		}
 	case reflect.String:
 		numChars := rand.Intn(complexSize)
 		codePoints := make([]rune, numChars)
@@ -153,7 +165,7 @@ type Config struct {
 	Rand *rand.Rand
 	// If non-nil, the Values function generates a slice of arbitrary
 	// reflect.Values that are congruent with the arguments to the function
-	// being tested. Otherwise, the top-level Values function is used
+	// being tested. Otherwise, the top-level Value function is used
 	// to generate them.
 	Values func([]reflect.Value, *rand.Rand)
 }
@@ -237,7 +249,7 @@ func Check(f interface{}, config *Config) (err error) {
 	}
 
 	if fType.NumOut() != 1 {
-		err = SetupError("function returns more than one value.")
+		err = SetupError("function does not return one value")
 		return
 	}
 	if fType.Out(0).Kind() != reflect.Bool {