diff --git a/include/llvm/Target/MRegisterInfo.h b/include/llvm/Target/MRegisterInfo.h
index a28f2c31890..8ec2dde297d 100644
--- a/include/llvm/Target/MRegisterInfo.h
+++ b/include/llvm/Target/MRegisterInfo.h
@@ -33,10 +33,10 @@ class MachineInstr;
 /// Registers that this does not apply to simply should set this to null.
 ///
 struct MRegisterDesc {
-  const char     *Name;       // Assembly language name for the register
-  const unsigned *AliasSet;   // Register Alias Set, described above
-  unsigned        Flags;      // Flags identifying register properties (below)
-  unsigned        TSFlags;    // Target Specific Flags
+  const char     *Name;         // Assembly language name for the register
+  const unsigned *AliasSet;     // Register Alias Set, described above
+  unsigned char SpillSize;      // Size of this register in bytes
+  unsigned char SpillAlignment; // Alignment of stack slot for this reg
 };
 
 class TargetRegisterClass {
@@ -194,6 +194,18 @@ public:
     return get(RegNo).Name;
   }
 
+  /// getSpillSize - Return the size required of a stack slot used to spill
+  /// register into.
+  unsigned getSpillSize(unsigned RegNo) const {
+    return get(RegNo).SpillSize;
+  }
+
+  /// getSpillAlignment - Return the alignment required by a stack slot used to
+  /// spill register into.
+  unsigned getSpillAlignment(unsigned RegNo) const {
+    return get(RegNo).SpillAlignment;
+  }
+
   /// getNumRegs - Return the number of registers this target has
   /// (useful for sizing arrays holding per register information)
   unsigned getNumRegs() const {