Add support for float-to-double & double-to-float in optimizing.

Change-Id: I41b0fee5a28c83757697c8d000b7e224cf5a4534
diff --git a/compiler/optimizing/builder.cc b/compiler/optimizing/builder.cc
index 0ac93a2..252e4fa 100644
--- a/compiler/optimizing/builder.cc
+++ b/compiler/optimizing/builder.cc
@@ -1119,6 +1119,16 @@
       break;
     }
 
+    case Instruction::FLOAT_TO_DOUBLE: {
+      Conversion_12x(instruction, Primitive::kPrimFloat, Primitive::kPrimDouble, dex_pc);
+      break;
+    }
+
+    case Instruction::DOUBLE_TO_FLOAT: {
+      Conversion_12x(instruction, Primitive::kPrimDouble, Primitive::kPrimFloat, dex_pc);
+      break;
+    }
+
     case Instruction::INT_TO_BYTE: {
       Conversion_12x(instruction, Primitive::kPrimInt, Primitive::kPrimByte, dex_pc);
       break;