Subzero. Buildable, non-functional TargetLoweringX8664.

src/IceTargetLoweringX86Base.h

 //===- subzero/src/IceTargetLoweringX86Base.h - x86 lowering ----*- C++ -*-===//
 //
 //                        The Subzero Code Generator
 //
 // This file is distributed under the University of Illinois Open Source
 // License. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
 ///
 /// \file
@@ skipping 321 matching lines @@
   }
   void _div(Variable *Dest, Operand *Src0, Operand *Src1) {
     Context.insert(Traits::Insts::Div::create(Func, Dest, Src0, Src1));
   }
   void _divps(Variable *Dest, Operand *Src0) {
     Context.insert(Traits::Insts::Divps::create(Func, Dest, Src0));
   }
   void _divss(Variable *Dest, Operand *Src0) {
     Context.insert(Traits::Insts::Divss::create(Func, Dest, Src0));
   }
-  void _fld(Operand *Src0) {
-    Context.insert(Traits::Insts::Fld::create(Func, Src0));
+  template <typename T = Traits>
+  typename std::enable_if<T::UsesX87, void>::type _fld(Operand *Src0) {
+    Context.insert(Traits::Insts::template Fld<>::create(Func, Src0));
   }
-  void _fstp(Variable *Dest) {
-    Context.insert(Traits::Insts::Fstp::create(Func, Dest));
+  // TODO(jpp): when implementing the X8664 calling convention, make sure x8664
+  // does not invoke this method, and remove it.
+  template <typename T = Traits>
+  typename std::enable_if<!T::UsesX87, void>::type _fld(Operand *) {
+    llvm::report_fatal_error("fld is not available in x86-64");
+  }
+  template <typename T = Traits>
+  typename std::enable_if<T::UsesX87, void>::type _fstp(Variable *Dest) {
+    Context.insert(Traits::Insts::template Fstp<>::create(Func, Dest));
+  }
+  // TODO(jpp): when implementing the X8664 calling convention, make sure x8664
+  // does not invoke this method, and remove it.
+  template <typename T = Traits>
+  typename std::enable_if<!T::UsesX87, void>::type _fstp(Variable *) {
+    llvm::report_fatal_error("fstp is not available in x86-64");
   }
   void _idiv(Variable *Dest, Operand *Src0, Operand *Src1) {
     Context.insert(Traits::Insts::Idiv::create(Func, Dest, Src0, Src1));
   }
   void _imul(Variable *Dest, Operand *Src0) {
     Context.insert(Traits::Insts::Imul::create(Func, Dest, Src0));
   }
   void _insertps(Variable *Dest, Operand *Src0, Operand *Src1) {
     Context.insert(Traits::Insts::Insertps::create(Func, Dest, Src0, Src1));
   }
@@ skipping 248 matching lines @@
   }
 
   BoolFolding FoldingInfo;
 };
 } // end of namespace X86Internal
 } // end of namespace Ice
 
 #include "IceTargetLoweringX86BaseImpl.h"
 
 #endif // SUBZERO_SRC_ICETARGETLOWERINGX86BASE_H