--- a/graal/com.oracle.graal.api.code/src/com/oracle/graal/api/code/CodeUtil.java	Mon Oct 13 15:52:19 2014 -0700
+++ b/graal/com.oracle.graal.api.code/src/com/oracle/graal/api/code/CodeUtil.java	Tue Oct 14 11:38:10 2014 +0200
@@ -326,9 +326,44 @@
     }
 
     /**
+     * Formats a location in a register reference map.
+     */
+    public static class DefaultRegFormatter implements RefMapFormatter {
+
+        private final Register[] registers;
+
+        public DefaultRegFormatter(Architecture arch) {
+            registers = new Register[arch.getRegisterReferenceMapSize()];
+            for (Register r : arch.getRegisters()) {
+                if (r.getReferenceMapIndex() >= 0) {
+                    registers[r.getReferenceMapIndex()] = r;
+                }
+            }
+        }
+
+        public String formatStackSlot(int frameRefMapIndex) {
+            return null;
+        }
+
+        public String formatRegister(int regRefMapIndex) {
+            int i = regRefMapIndex;
+            int idx = 0;
+            while (registers[i] == null) {
+                i--;
+                idx++;
+            }
+            if (idx == 0) {
+                return registers[i].toString();
+            } else {
+                return String.format("%s+%d", registers[i].toString(), idx);
+            }
+        }
+    }
+
+    /**
      * Formats a location present in a register or frame reference map.
      */
-    public static class DefaultRefMapFormatter implements RefMapFormatter {
+    public static class DefaultRefMapFormatter extends DefaultRegFormatter {
 
         /**
          * The size of a stack slot.
@@ -340,10 +375,6 @@
          */
         public final Register fp;
 
-        public final Architecture arch;
-
-        private final Register[] registers;
-
         /**
          * The offset (in bytes) from the slot pointed to by {@link #fp} to the slot corresponding
          * to bit 0 in the frame reference map.
@@ -351,13 +382,13 @@
         public final int refMapToFPOffset;
 
         public DefaultRefMapFormatter(Architecture arch, int slotSize, Register fp, int refMapToFPOffset) {
-            this.arch = arch;
+            super(arch);
             this.slotSize = slotSize;
             this.fp = fp;
             this.refMapToFPOffset = refMapToFPOffset;
-            this.registers = arch.getRegisters();
         }
 
+        @Override
         public String formatStackSlot(int frameRefMapIndex) {
             int refMapOffset = frameRefMapIndex * slotSize;
             int fpOffset = refMapOffset + refMapToFPOffset;
@@ -366,10 +397,6 @@
             }
             return fp.name + fpOffset;
         }
-
-        public String formatRegister(int regRefMapIndex) {
-            return registers[regRefMapIndex].toString();
-        }
     }
 
     public static class NumberedRefMapFormatter implements RefMapFormatter {

--- a/graal/com.oracle.graal.printer/src/com/oracle/graal/printer/CompilationPrinter.java	Mon Oct 13 15:52:19 2014 -0700
+++ b/graal/com.oracle.graal.printer/src/com/oracle/graal/printer/CompilationPrinter.java	Tue Oct 14 11:38:10 2014 +0200
@@ -112,23 +112,6 @@
         end("compilation");
     }
 
-    private static class ArchitectureRegFormatter implements RefMapFormatter {
-
-        private final Register[] registers;
-
-        public ArchitectureRegFormatter(Architecture arch) {
-            registers = arch.getRegisters();
-        }
-
-        public String formatStackSlot(int frameRefMapIndex) {
-            return null;
-        }
-
-        public String formatRegister(int regRefMapIndex) {
-            return registers[regRefMapIndex].toString();
-        }
-    }
-
     /**
      * Formats given debug info as a multi line string.
      */
@@ -138,7 +121,7 @@
 
         if (refMap != null && refMap.hasRegisterRefMap()) {
             sb.append("reg-ref-map:");
-            refMap.appendRegisterMap(sb, arch != null ? new ArchitectureRegFormatter(arch) : formatter);
+            refMap.appendRegisterMap(sb, arch != null ? new CodeUtil.DefaultRegFormatter(arch) : formatter);
             sb.append("\n");
         }