diff --git a/src/IceTypes.def b/src/IceTypes.def
index 0d4ec86..a1a2552 100644
--- a/src/IceTypes.def
+++ b/src/IceTypes.def
@@ -26,7 +26,7 @@
 #define TARGETARCH_TABLE                                                       \
   /* enum value, printable string, is_elf64,   e_machine, e_flags */           \
   X(Target_X8632, "x86-32", false, EM_386,     0)                              \
-  X(Target_X8664, "x86-64", true,  EM_X86_64,  0)                               \
+  X(Target_X8664, "x86-64", true,  EM_X86_64,  0)                              \
   X(Target_ARM32, "arm32",  false, EM_ARM,     EF_ARM_EABI_VER5)               \
   X(Target_ARM64, "arm64",  true,  EM_AARCH64, 0)                              \
   X(Target_MIPS32,"mips32", false, EM_MIPS,    0)                              \
@@ -34,23 +34,24 @@
 
 #define ICETYPE_TABLE                                                          \
   /* enum value, log_2(size), align, # elts, element type, */                  \
-  /*     printable string (size and alignment in bytes) */                     \
-  X(void,  -1,  0,  1, void, "void")                                           \
-  X(i1,     0,  1,  1, i1,   "i1")                                             \
-  X(i8,     0,  1,  1, i8,   "i8")                                             \
-  X(i16,    1,  1,  1, i16,  "i16")                                            \
-  X(i32,    2,  1,  1, i32,  "i32")                                            \
-  X(i64,    3,  1,  1, i64,  "i64")                                            \
-  X(f32,    2,  4,  1, f32,  "float")                                          \
-  X(f64,    3,  8,  1, f64,  "double")                                         \
-  X(v4i1,   4,  1,  4, i1,   "<4 x i1>")                                       \
-  X(v8i1,   4,  1,  8, i1,   "<8 x i1>")                                       \
-  X(v16i1,  4,  1, 16, i1,   "<16 x i1>")                                      \
-  X(v16i8,  4,  1, 16, i8,   "<16 x i8>")                                      \
-  X(v8i16,  4,  2,  8, i16,  "<8 x i16>")                                      \
-  X(v4i32,  4,  4,  4, i32,  "<4 x i32>")                                      \
-  X(v4f32,  4,  4,  4, f32,  "<4 x float>")                                    \
-//#define X(tag, sizeLog2, align, elts, elty, str)
+  /*     printable string (size and alignment in bytes), */                    \
+  /*     register class string */                                              \
+  X(void,  -1,  0,  1, void, "void",        "void")                            \
+  X(i1,     0,  1,  1, i1,   "i1",          "i1")                              \
+  X(i8,     0,  1,  1, i8,   "i8",          "i8")                              \
+  X(i16,    1,  1,  1, i16,  "i16",         "i16")                             \
+  X(i32,    2,  1,  1, i32,  "i32",         "i32")                             \
+  X(i64,    3,  1,  1, i64,  "i64",         "i64")                             \
+  X(f32,    2,  4,  1, f32,  "float",       "f32")                             \
+  X(f64,    3,  8,  1, f64,  "double",      "f64")                             \
+  X(v4i1,   4,  1,  4, i1,   "<4 x i1>",    "v4i1")                            \
+  X(v8i1,   4,  1,  8, i1,   "<8 x i1>",    "v8ii")                            \
+  X(v16i1,  4,  1, 16, i1,   "<16 x i1>",   "v16i1")                           \
+  X(v16i8,  4,  1, 16, i8,   "<16 x i8>",   "v16i8")                           \
+  X(v8i16,  4,  2,  8, i16,  "<8 x i16>",   "v8i16")                           \
+  X(v4i32,  4,  4,  4, i32,  "<4 x i32>",   "v4i32")                           \
+  X(v4f32,  4,  4,  4, f32,  "<4 x float>", "v4f32")                           \
+//#define X(tag, sizeLog2, align, elts, elty, str, rcstr)
 
 // Dictionary:
 //   V - Is vector type.