--- old/src/jdk.internal.vm.compiler/share/classes/org.graalvm.compiler.lir/src/org/graalvm/compiler/lir/gen/LIRGenerationResult.java	2017-11-03 23:56:59.008009222 -0700
+++ new/src/jdk.internal.vm.compiler/share/classes/org.graalvm.compiler.lir/src/org/graalvm/compiler/lir/gen/LIRGenerationResult.java	2017-11-03 23:56:58.675994364 -0700
@@ -22,6 +22,7 @@
  */
 package org.graalvm.compiler.lir.gen;
 
+import jdk.vm.ci.code.RegisterConfig;
 import org.graalvm.compiler.core.common.CompilationIdentifier;
 import org.graalvm.compiler.core.common.CompilationIdentifier.Verbosity;
 import org.graalvm.compiler.debug.DebugContext;
@@ -123,6 +124,10 @@
         return frameMap;
     }
 
+    public final RegisterConfig getRegisterConfig() {
+        return frameMapBuilder.getRegisterConfig();
+    }
+
     public LIR getLIR() {
         return lir;
     }