*** old/src/jdk.internal.vm.compiler/share/classes/org.graalvm.compiler.core/src/org/graalvm/compiler/core/target/Backend.java	Mon Mar 20 17:37:49 2017
--- new/src/jdk.internal.vm.compiler/share/classes/org.graalvm.compiler.core/src/org/graalvm/compiler/core/target/Backend.java	Mon Mar 20 17:37:49 2017

*** 20,31 ****
--- 20,29 ----
   * or visit www.oracle.com if you need additional information or have any
   * questions.
   */
  package org.graalvm.compiler.core.target;
  
  import java.util.Set;
  
  import org.graalvm.compiler.asm.Assembler;
  import org.graalvm.compiler.code.CompilationResult;
  import org.graalvm.compiler.core.common.CompilationIdentifier;
  import org.graalvm.compiler.core.common.LIRKind;
  import org.graalvm.compiler.core.common.alloc.RegisterAllocationConfig;

*** 43,52 ****
--- 41,51 ----
  import org.graalvm.compiler.nodes.StructuredGraph;
  import org.graalvm.compiler.nodes.spi.NodeLIRBuilderTool;
  import org.graalvm.compiler.phases.tiers.SuitesProvider;
  import org.graalvm.compiler.phases.tiers.TargetProvider;
  import org.graalvm.compiler.phases.util.Providers;
+ import org.graalvm.util.EconomicSet;
  
  import jdk.vm.ci.code.BailoutException;
  import jdk.vm.ci.code.CodeCacheProvider;
  import jdk.vm.ci.code.CompilationRequest;
  import jdk.vm.ci.code.CompiledCode;

*** 111,121 ****
--- 110,126 ----
       * The given registerConfig is optional, in case null is passed the default RegisterConfig from
       * the CodeCacheProvider will be used.
       */
      public abstract FrameMapBuilder newFrameMapBuilder(RegisterConfig registerConfig);
  
      public abstract RegisterAllocationConfig newRegisterAllocationConfig(RegisterConfig registerConfig);
+     /**
+      * Creates a new configuration for register allocation.
+      *
+      * @param allocationRestrictedTo if not {@code null}, register allocation will be restricted to
+      *            registers whose names appear in this array
+      */
+     public abstract RegisterAllocationConfig newRegisterAllocationConfig(RegisterConfig registerConfig, String[] allocationRestrictedTo);
  
      public abstract FrameMap newFrameMap(RegisterConfig registerConfig);
  
      public abstract LIRGeneratorTool newLIRGenerator(LIRGenerationResult lirGenRes);
  

*** 218,228 ****
--- 223,233 ----
      /**
       * Translates a set of registers from the callee's perspective to the caller's perspective. This
       * is needed for architectures where input/output registers are renamed during a call (e.g.
       * register windows on SPARC). Registers which are not visible by the caller are removed.
       */
!     public abstract EconomicSet<Register> translateToCallerRegisters(EconomicSet<Register> calleeRegisters);
  
      /**
       * Gets the compilation id for a given {@link ResolvedJavaMethod}. Returns
       * {@code CompilationIdentifier#INVALID_COMPILATION_ID} in case there is no such id.
       *