Turn off dump/emit routines when building minimal subzero.

src/IceGlobalContext.h

 //===- subzero/src/IceGlobalContext.h - Global context defs -----*- C++ -*-===//
 //
 //                        The Subzero Code Generator
 //
 // This file is distributed under the University of Illinois Open Source
 // License. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
 //
 // This file declares aspects of the compilation that persist across
@@ skipping 30 matching lines @@
   CodeStats()
       : InstructionsEmitted(0), RegistersSaved(0), FrameBytes(0), Spills(0),
         Fills(0) {}
   void reset() { *this = CodeStats(); }
   void updateEmitted(uint32_t InstCount) { InstructionsEmitted += InstCount; }
   void updateRegistersSaved(uint32_t Num) { RegistersSaved += Num; }
   void updateFrameBytes(uint32_t Bytes) { FrameBytes += Bytes; }
   void updateSpills() { ++Spills; }
   void updateFills() { ++Fills; }
   void dump(const IceString &Name, Ostream &Str) {
+    if (!ALLOW_DUMP)
+      return;
     Str << "|" << Name << "|Inst Count  |" << InstructionsEmitted << "\n";
     Str << "|" << Name << "|Regs Saved  |" << RegistersSaved << "\n";
     Str << "|" << Name << "|Frame Bytes |" << FrameBytes << "\n";
     Str << "|" << Name << "|Spills      |" << Spills << "\n";
     Str << "|" << Name << "|Fills       |" << Fills << "\n";
     Str << "|" << Name << "|Spills+Fills|" << Spills + Fills << "\n";
   }
 
 private:
   uint32_t InstructionsEmitted;
@@ skipping 178 matching lines @@
 
 private:
   TimerIdT ID;
   GlobalContext *const Ctx;
   const bool Active;
 };
 
 } // end of namespace Ice
 
 #endif // SUBZERO_SRC_ICEGLOBALCONTEXT_H