Subzero: Initial implementation of BB Local CSE

src/IceTargetLoweringX86BaseImpl.h

 //===- subzero/src/IceTargetLoweringX86BaseImpl.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 425 matching lines @@
   }
 
   genTargetHelperCalls();
   Func->dump("After target helper call insertion");
 
   // Merge Alloca instructions, and lay out the stack.
   static constexpr bool SortAndCombineAllocas = true;
   Func->processAllocas(SortAndCombineAllocas);
   Func->dump("After Alloca processing");
 
+  if (getFlags().getEnableExperimental()) {
+    Func->localCSE();
+    Func->dump("After Local CSE");
+  }
+
   if (!getFlags().getEnablePhiEdgeSplit()) {
     // Lower Phi instructions.
     Func->placePhiLoads();
     if (Func->hasError())
       return;
     Func->placePhiStores();
     if (Func->hasError())
       return;
     Func->deletePhis();
     if (Func->hasError())
@@ skipping 7486 matching lines @@
         emitGlobal(*Var, SectionSuffix);
       }
     }
   } break;
   }
 }
 } // end of namespace X86NAMESPACE
 } // end of namespace Ice
 
 #endif // SUBZERO_SRC_ICETARGETLOWERINGX86BASEIMPL_H