--- old/graal/com.oracle.graal.hotspot.hsail/src/com/oracle/graal/hotspot/hsail/HSAILHotSpotBackend.java	2013-12-12 12:32:45.993342610 -0600
+++ new/graal/com.oracle.graal.hotspot.hsail/src/com/oracle/graal/hotspot/hsail/HSAILHotSpotBackend.java	2013-12-12 12:32:45.909342610 -0600
@@ -41,6 +41,8 @@
 import com.oracle.graal.lir.asm.*;
 import com.oracle.graal.lir.hsail.*;
 import com.oracle.graal.nodes.*;
+import com.oracle.graal.nodes.spi.Replacements;
+import com.oracle.graal.replacements.hsail.*;
 
 /**
  * HSAIL specific backend.
@@ -63,12 +65,27 @@
         return true;
     }
 
+    /**
+     * Completes the initialization of the HSAIL backend. This includes initializing the providers
+     * and registering any method substitutions specified by the HSAIL backend.
+     */
     @Override
     public void completeInitialization() {
         final HotSpotProviders providers = getProviders();
         HotSpotVMConfig config = getRuntime().getConfig();
+        // Initialize the lowering provider.
         final HotSpotLoweringProvider lowerer = (HotSpotLoweringProvider) providers.getLowerer();
         lowerer.initialize(providers, config);
+        // Register the replacements used by the HSAIL backend.
+        Replacements replacements = providers.getReplacements();
+        try {
+            // Register the substitutions for java.lang.Math routines.
+            // replacements.registerSubstitutions(Class.forName("com.oracle.graal.replacements.hsail.HSAILMathSubstitutions"));
+            replacements.registerSubstitutions(HSAILMathSubstitutions.class);
+
+        } catch (Exception e) {
+            e.printStackTrace();
+        }
     }
 
     /**