Subzero: Simplify the constant pools.

src/IceOperand.cpp

 //===- subzero/src/IceOperand.cpp - High-level operand implementation -----===//
 //
 //                        The Subzero Code Generator
 //
 // This file is distributed under the University of Illinois Open Source
 // License. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
 //
 // This file implements the Operand class and its target-independent
 // subclasses, primarily for the methods of the Variable class.
 //
 //===----------------------------------------------------------------------===//
 
 #include "IceCfg.h"
 #include "IceCfgNode.h"
 #include "IceInst.h"
 #include "IceOperand.h"
 #include "IceTargetLowering.h" // dumping stack/frame pointer register
 
 namespace Ice {
 
-bool operator<(const RelocatableTuple &A, const RelocatableTuple &B) {
-  if (A.Offset != B.Offset)
-    return A.Offset < B.Offset;
-  if (A.SuppressMangling != B.SuppressMangling)
-    return A.SuppressMangling < B.SuppressMangling;
-  return A.Name < B.Name;
+bool operator==(const RelocatableTuple &A, const RelocatableTuple &B) {
+  if (A.Offset != B.Offset || A.SuppressMangling != B.SuppressMangling)
+    return false;
+  return A.Name == B.Name;
 }
 
 bool operator<(const RegWeight &A, const RegWeight &B) {
   return A.getWeight() < B.getWeight();
 }
 bool operator<=(const RegWeight &A, const RegWeight &B) { return !(B < A); }
 bool operator==(const RegWeight &A, const RegWeight &B) {
   return !(B < A) && !(A < B);
 }
 
@@ skipping 481 matching lines @@
   if (!ALLOW_DUMP)
     return Str;
   if (W.getWeight() == RegWeight::Inf)
     Str << "Inf";
   else
     Str << W.getWeight();
   return Str;
 }
 
 } // end of namespace Ice