llgo/ssa: phi refactor

cl/_testgo/abiname/in.go

@@ -0,0 +1,16 @@
+package main
+
+import "github.com/goplus/llgo/internal/abi"
+
+// NewPkgName creates a package name.
+func NewPkgName(pkgPath string) (ret abi.Name) {
+	if len(pkgPath) > 0 {
+		ret = abi.NewName(pkgPath, "", false, false)
+	}
+	return
+}
+
+func main() {
+	n := NewPkgName("pkgPath")
+	println(n.Name(), n.Tag(), n.IsExported(), n.IsEmbedded(), n.IsBlank())
+}