libgo: update to Go 1.8 release candidate 1

    
    Compiler changes:
      * Change map assignment to use mapassign and assign value directly.
      * Change string iteration to use decoderune, faster for ASCII strings.
      * Change makeslice to take int, and use makeslice64 for larger values.
      * Add new noverflow field to hmap struct used for maps.
    
    Unresolved problems, to be fixed later:
      * Commented out test in go/types/sizes_test.go that doesn't compile.
      * Commented out reflect.TestStructOf test for padding after zero-sized field.
    
    Reviewed-on: https://go-review.googlesource.com/35231

gotools/:
	Updates for Go 1.8rc1.
	* Makefile.am (go_cmd_go_files): Add bug.go.
	(s-zdefaultcc): Write defaultPkgConfig.
	* Makefile.in: Rebuild.

From-SVN: r244456

1 files changed, 9 insertions, 0 deletions

diff --git a/libgo/go/crypto/rand/util_test.go b/libgo/go/crypto/rand/util_test.go
index 7b07689..48a2c3f 100644
--- a/libgo/go/crypto/rand/util_test.go
+++ b/libgo/go/crypto/rand/util_test.go
@@ -7,7 +7,9 @@ package rand_test
 import (
 	"crypto/rand"
 	"math/big"
+	mathrand "math/rand"
 	"testing"
+	"time"
 )
 
 // https://golang.org/issue/6849.
@@ -63,3 +65,10 @@ func TestIntNegativeMaxPanics(t *testing.T) {
 	b := new(big.Int).SetInt64(int64(-1))
 	testIntPanics(t, b)
 }
+
+func BenchmarkPrime(b *testing.B) {
+	r := mathrand.New(mathrand.NewSource(time.Now().UnixNano()))
+	for i := 0; i < b.N; i++ {
+		rand.Prime(r, 1024)
+	}
+}