cmd/compile/internal: loop opt

Change-Id: I19faa360d72d19943c66c50167e2b8a17f046b59
2021-02-19 01:24:13 +08:00 · 2021-02-19 01:24:13 +08:00 · 94fea3d572
parent 609d82b289
commit 94fea3d572
1 changed files with 5 additions and 3 deletions
--- a/src/cmd/compile/internal/types/size.go
+++ b/src/cmd/compile/internal/types/size.go
@ -619,9 +619,11 @@ func PtrDataSize(t *Type) int64 {
 	case TSTRUCT:
 		// Find the last field that has pointers.
 		var lastPtrField *Field
-		for _, t1 := range t.Fields().Slice() {
-			if t1.Type.HasPointers() {
-				lastPtrField = t1
+		fs := t.Fields().Slice()
+		for i := len(fs) - 1; i >= 0; i-- {
+			if fs[i].Type.HasPointers() {
+				lastPtrField = fs[i]
+				break
 			}
 		}
 		return lastPtrField.Offset + PtrDataSize(lastPtrField.Type)