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

src/IceTypes.h

 //===- subzero/src/IceTypes.h - Primitive ICE types -------------*- C++ -*-===//
 //
 //                        The Subzero Code Generator
 //
 // This file is distributed under the University of Illinois Open Source
 // License. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
 ///
 /// \file
 /// \brief Declares a few properties of the primitive types allowed in Subzero.
 /// Every Subzero source file is expected to include IceTypes.h.
 ///
 //===----------------------------------------------------------------------===//
 
 #ifndef SUBZERO_SRC_ICETYPES_H
 #define SUBZERO_SRC_ICETYPES_H
 
 #include "IceDefs.h"
 #include "IceTypes.def"
 
 namespace Ice {
 
 enum Type {
-#define X(tag, sizeLog2, align, elts, elty, str) IceType_##tag,
+#define X(tag, sizeLog2, align, elts, elty, str, rcstr) IceType_##tag,
   ICETYPE_TABLE
 #undef X
       IceType_NUM
 };
 
+/// 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, rcstr)                        \
+  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");
+
 enum TargetArch {
 #define X(tag, str, is_elf64, e_machine, e_flags) tag,
   TARGETARCH_TABLE
 #undef X
       TargetArch_NUM
 };
 
 const char *targetArchString(TargetArch Arch);
 
 inline Ostream &operator<<(Ostream &Stream, TargetArch Arch) {
@@ skipping 16 matching lines @@
 };
 
 enum OptLevel { Opt_m1, Opt_0, Opt_1, Opt_2 };
 
 size_t typeWidthInBytes(Type Ty);
 int8_t typeWidthInBytesLog2(Type Ty);
 size_t typeAlignInBytes(Type Ty);
 size_t typeNumElements(Type Ty);
 Type typeElementType(Type Ty);
 const char *typeString(Type Ty);
+const char *regClassString(RegClass C);
 
 inline Type getPointerType() { return IceType_i32; }
 
 bool isVectorType(Type Ty);
 
 bool isIntegerType(Type Ty); // scalar or vector
 bool isScalarIntegerType(Type Ty);
 bool isVectorIntegerType(Type Ty);
 bool isIntegerArithmeticType(Type Ty);
 
@@ skipping 86 matching lines @@
 };
 
 inline Ostream &operator<<(Ostream &Stream, const FuncSigType &Sig) {
   Sig.dump(Stream);
   return Stream;
 }
 
 } // end of namespace Ice
 
 #endif // SUBZERO_SRC_ICETYPES_H