use constant for import all in AbstractImportNode.importModule()

Author: tomasstupka

graalpython/com.oracle.graal.python/src/com/oracle/graal/python/builtins/modules/cext/PythonCextImportBuiltins.java

@@ -40,6 +40,8 @@
  */
 package com.oracle.graal.python.builtins.modules.cext;
 
+import static com.oracle.graal.python.nodes.statement.AbstractImportNode.IMPORT_ALL;
+
 import com.oracle.graal.python.builtins.Builtin;
 import java.util.List;
 import com.oracle.graal.python.builtins.CoreFunctions;
@@ -80,7 +82,7 @@ public Object imp(String name,
                         @Cached TransformExceptionToNativeNode transformExceptionToNativeNode,
                         @Cached GetNativeNullNode getNativeNull) {
             try {
-                return AbstractImportNode.importModule(name, new String[]{"*"});
+                return AbstractImportNode.importModule(name, IMPORT_ALL);
             } catch (PException e) {
                 transformExceptionToNativeNode.execute(e);
                 return getNativeNull.execute();

graalpython/com.oracle.graal.python/src/com/oracle/graal/python/nodes/statement/AbstractImportNode.java

@@ -87,6 +87,8 @@
 
 public abstract class AbstractImportNode extends StatementNode {
 
+    @CompilationFinal(dimensions = 1) public static final String[] IMPORT_ALL = new String[]{"*"};
+    
     @Child ImportName importNameNode;
 
     public AbstractImportNode() {

graalpython/com.oracle.graal.python/src/com/oracle/graal/python/nodes/statement/ImportStarNode.java

@@ -116,7 +116,7 @@ public ImportStarNode(String moduleName, int level) {
 
     @Override
     public void executeVoid(VirtualFrame frame) {
-        Object importedModule = importModule(frame, moduleName, PArguments.getGlobals(frame), new String[]{"*"}, level);
+        Object importedModule = importModule(frame, moduleName, PArguments.getGlobals(frame), IMPORT_ALL, level);
         PythonObject locals = fastGetCustomLocalsOrGlobals(frame, havePyFrame, haveCustomLocals);
 
         if (javaImport.profile(emulateJython() && getContext().getEnv().isHostObject(importedModule))) {