[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, 23 insertions, 2 deletions

diff --git a/llgo/third_party/gofrontend/libgo/go/time/time_test.go b/llgo/third_party/gofrontend/libgo/go/time/time_test.go
index 7e31dd78a92..2d16ea59ae3 100644
--- a/llgo/third_party/gofrontend/libgo/go/time/time_test.go
+++ b/llgo/third_party/gofrontend/libgo/go/time/time_test.go
@@ -830,8 +830,16 @@ var parseDurationTests = []struct {
 	{"39h9m14.425s", true, 39*Hour + 9*Minute + 14*Second + 425*Millisecond},
 	// large value
 	{"52763797000ns", true, 52763797000 * Nanosecond},
-	// more than 9 digits after decimal point, see http://golang.org/issue/6617
+	// more than 9 digits after decimal point, see https://golang.org/issue/6617
 	{"0.3333333333333333333h", true, 20 * Minute},
+	// 9007199254740993 = 1<<53+1 cannot be stored precisely in a float64
+	{"9007199254740993ns", true, (1<<53 + 1) * Nanosecond},
+	// largest duration that can be represented by int64 in nanoseconds
+	{"9223372036854775807ns", true, (1<<63 - 1) * Nanosecond},
+	{"9223372036854775.807us", true, (1<<63 - 1) * Nanosecond},
+	{"9223372036s854ms775us807ns", true, (1<<63 - 1) * Nanosecond},
+	// large negative value
+	{"-9223372036854775807ns", true, -1<<63 + 1*Nanosecond},
 
 	// errors
 	{"", false, 0},
@@ -842,7 +850,13 @@ var parseDurationTests = []struct {
 	{"-.", false, 0},
 	{".s", false, 0},
 	{"+.s", false, 0},
-	{"3000000h", false, 0}, // overflow
+	{"3000000h", false, 0},                  // overflow
+	{"9223372036854775808ns", false, 0},     // overflow
+	{"9223372036854775.808us", false, 0},    // overflow
+	{"9223372036854ms775us808ns", false, 0}, // overflow
+	// largest negative value of type int64 in nanoseconds should fail
+	// see https://go-review.googlesource.com/#/c/2461/
+	{"-9223372036854775808ns", false, 0},
 }
 
 func TestParseDuration(t *testing.T) {
@@ -1052,6 +1066,13 @@ func BenchmarkParse(b *testing.B) {
 	}
 }
 
+func BenchmarkParseDuration(b *testing.B) {
+	for i := 0; i < b.N; i++ {
+		ParseDuration("9007199254.740993ms")
+		ParseDuration("9007199254740993ns")
+	}
+}
+
 func BenchmarkHour(b *testing.B) {
 	t := Now()
 	for i := 0; i < b.N; i++ {