Index: lib/Target/Sparc/SparcISelLowering.cpp
===================================================================
--- lib/Target/Sparc/SparcISelLowering.cpp
+++ lib/Target/Sparc/SparcISelLowering.cpp
@@ -3383,7 +3383,9 @@
   if (Constraint.size() == 1) {
     switch (Constraint[0]) {
     default:  break;
-    case 'r': return C_RegisterClass;
+    case 'r':
+    case 'f':
+      return C_RegisterClass;
     case 'I': // SIMM13
       return C_Other;
     }
@@ -3457,6 +3459,18 @@
                                                   MVT VT) const {
   if (Constraint.size() == 1) {
     switch (Constraint[0]) {
+    case 'f':
+      if (VT == MVT::f32)
+        return std::make_pair(0U, &SP::FPRegsRegClass);
+      else if (VT == MVT::f64)
+        return std::make_pair(0U, &SP::DFPRegsRegClass);
+      else if (VT == MVT::f128)
+        return std::make_pair(0U, &SP::QFPRegsRegClass);
+
+      llvm_unreachable("Unknown ValueType for f-register-type!");
+
+      break;
+
     case 'r':
       if (VT == MVT::v2i32)
         return std::make_pair(0U, &SP::IntPairRegClass);