Subzero: Make -reg-use and -reg-exclude specific to register class.

src/IceOperand.h

Index: src/IceOperand.h
diff --git a/src/IceOperand.h b/src/IceOperand.h
index 137d456cbc9da516b95ba957ac4e25f17e11ed60..a32ec2b7e2c5e9c99901c6d682fa7c834b5d11cb 100644
--- a/src/IceOperand.h
+++ b/src/IceOperand.h
@@ -424,23 +424,6 @@ private:
 
 Ostream &operator<<(Ostream &Str, const LiveRange &L);
 
-/// RegClass indicates the physical register class that a Variable may be
-/// register-allocated from.  By default, a variable's register class is
-/// directly associated with its type.  However, the target lowering may define
-/// additional target-specific register classes by extending the set of enum
-/// values.
-enum RegClass : uint8_t {
-// Define RC_void, RC_i1, RC_i8, etc.
-#define X(tag, sizeLog2, align, elts, elty, str) RC_##tag = IceType_##tag,
-  ICETYPE_TABLE
-#undef X
-      RC_Target,
-  // Leave plenty of space for target-specific values.
-  RC_Max = std::numeric_limits<uint8_t>::max()
-};
-static_assert(RC_Target == static_cast<RegClass>(IceType_NUM),
-              "Expected RC_Target and IceType_NUM to be the same");
-
 /// Variable represents an operand that is register-allocated or
 /// stack-allocated. If it is register-allocated, it will ultimately have a
 /// non-negative RegNum field.