src/jdk.internal.vm.compiler/share/classes/org.graalvm.compiler.hotspot/src/org/graalvm/compiler/hotspot/stubs/Stub.java

rev 56282 : [mq]: graal

@@ -1,7 +1,7 @@
 /*
- * Copyright (c) 2012, 2018, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2012, 2019, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
  * under the terms of the GNU General Public License version 2 only, as
  * published by the Free Software Foundation.

@@ -119,16 +119,12 @@
     public EconomicSet<Register> getDestroyedCallerRegisters() {
         assert destroyedCallerRegisters != null : "not yet initialized";
         return destroyedCallerRegisters;
     }
 
-    /**
-     * Determines if this stub preserves all registers apart from those it
-     * {@linkplain #getDestroyedCallerRegisters() destroys}.
-     */
-    public boolean preservesRegisters() {
-        return true;
+    public boolean shouldSaveRegistersAroundCalls() {
+        return linkage.getEffect() == HotSpotForeignCallLinkage.RegisterEffect.COMPUTES_REGISTERS_KILLED;
     }
 
     protected final OptionValues options;
     protected final HotSpotProviders providers;