Subzero: Make the register allocator more robust with -reg-use and -reg-exclude.

src/IceTargetLoweringX8664.cpp

 //===- subzero/src/IceTargetLoweringX8664.cpp - x86-64 lowering -----------===//
 //
 //                        The Subzero Code Generator
 //
 // This file is distributed under the University of Illinois Open Source
 // License. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
 ///
 /// \file
@@ skipping 89 matching lines @@
     llvm::array_lengthof(TableTypeX8664Attributes);
 
 const uint32_t TargetX8664Traits::X86_STACK_ALIGNMENT_BYTES = 16;
 const char *TargetX8664Traits::TargetName = "X8664";
 
 template <>
 std::array<llvm::SmallBitVector, RCX86_NUM>
     TargetX86Base<X8664::Traits>::TypeToRegisterSet = {{}};
 
 template <>
+std::array<llvm::SmallBitVector, RCX86_NUM>
+    TargetX86Base<X8664::Traits>::TypeToRegisterSetUnfiltered = {{}};
+
+template <>
 std::array<llvm::SmallBitVector,
            TargetX86Base<X8664::Traits>::Traits::RegisterSet::Reg_NUM>
     TargetX86Base<X8664::Traits>::RegisterAliases = {{}};
 
 template <>
 FixupKind TargetX86Base<X8664::Traits>::PcRelFixup =
     TargetX86Base<X8664::Traits>::Traits::FK_PcRel;
 
 template <>
 FixupKind TargetX86Base<X8664::Traits>::AbsFixup =
@@ skipping 654 matching lines @@
 #define X(tag, sizeLog2, align, elts, elty, str, rcstr)                        \
   static_assert(_table1_##tag == _table2_##tag,                                \
                 "Inconsistency between ICETYPEX8664_TABLE and ICETYPE_TABLE");
 ICETYPE_TABLE
 #undef X
 } // end of namespace dummy3
 } // end of anonymous namespace
 
 } // end of namespace X8664
 } // end of namespace Ice