Subzero: Add -Wshadow to the build.

src/IceInstX86Base.h

 //===- subzero/src/IceInstX86Base.h - Generic x86 instructions -*- C++ -*--===//
 //
 //                        The Subzero Code Generator
 //
 // This file is distributed under the University of Illinois Open Source
 // License. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
 ///
 /// \file
@@ skipping 2035 matching lines @@
 class InstX86BaseLockable : public InstX86Base<Machine> {
   InstX86BaseLockable() = delete;
   InstX86BaseLockable(const InstX86BaseLockable &) = delete;
   InstX86BaseLockable &operator=(const InstX86BaseLockable &) = delete;
 
 protected:
   bool Locked;
 
   InstX86BaseLockable(Cfg *Func,
                       typename InstX86Base<Machine>::InstKindX86 Kind,
-                      SizeT Maxsrcs, Variable *Dest, bool Locked)
-      : InstX86Base<Machine>(Func, Kind, Maxsrcs, Dest), Locked(Locked) {
+                      SizeT Maxsrcs, Variable *Dest, bool MyLocked)
+      : InstX86Base<Machine>(Func, Kind, Maxsrcs, Dest), Locked(MyLocked) {
     // Assume that such instructions are used for Atomics and be careful
     // with optimizations.
     this->HasSideEffects = Locked;
   }
 };
 
 /// Mul instruction - unsigned multiply.
 template <class Machine> class InstX86Mul final : public InstX86Base<Machine> {
   InstX86Mul() = delete;
   InstX86Mul(const InstX86Mul &) = delete;
@@ skipping 1071 matching lines @@
           &InstX86Base<Machine>::Traits::Assembler::psrl};                     \
   }                                                                            \
   }
 
 } // end of namespace X86Internal
 } // end of namespace Ice
 
 #include "IceInstX86BaseImpl.h"
 
 #endif // SUBZERO_SRC_ICEINSTX86BASE_H