Subzero. Moar performance tweaks.

src/IceTargetLowering.cpp

 //===- subzero/src/IceTargetLowering.cpp - Basic lowering implementation --===//
 //
 //                        The Subzero Code Generator
 //
 // This file is distributed under the University of Illinois Open Source
 // License. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
 ///
 /// \file
 /// \brief Implements the skeleton of the TargetLowering class.
 ///
 /// Specifically this invokes the appropriate lowering method for a given
 /// instruction kind and driving global register allocation. It also implements
 /// the non-deleted instruction iteration in LoweringContext.
 ///
 //===----------------------------------------------------------------------===//
 
 #include "IceTargetLowering.h"
 
+#include "IceBitVector.h"
 #include "IceCfg.h" // setError()
 #include "IceCfgNode.h"
 #include "IceGlobalContext.h"
 #include "IceGlobalInits.h"
 #include "IceInstVarIter.h"
 #include "IceOperand.h"
 #include "IceRegAlloc.h"
 
 // We prevent target-specific implementation details from leaking outside their
 // implementations by forbidding #include of target-specific header files
@@ skipping 505 matching lines @@
                      typeWidthInBytesOnStack(V2->getType());
             });
 }
 
 void TargetLowering::getVarStackSlotParams(
     VarList &SortedSpilledVariables, SmallBitVector &RegsUsed,
     size_t *GlobalsSize, size_t *SpillAreaSizeBytes,
     uint32_t *SpillAreaAlignmentBytes, uint32_t *LocalsSlotsAlignmentBytes,
     std::function<bool(Variable *)> TargetVarHook) {
   const VariablesMetadata *VMetadata = Func->getVMetadata();
-  llvm::BitVector IsVarReferenced(Func->getNumVariables());
+  BitVector IsVarReferenced(Func->getNumVariables());
   for (CfgNode *Node : Func->getNodes()) {
     for (Inst &Instr : Node->getInsts()) {
       if (Instr.isDeleted())
         continue;
       if (const Variable *Var = Instr.getDest())
         IsVarReferenced[Var->getIndex()] = true;
       FOREACH_VAR_IN_INST(Var, Instr) {
         IsVarReferenced[Var->getIndex()] = true;
       }
     }
@@ skipping 326 matching lines @@
   case Target_##X:                                                             \
     return ::X::createTargetHeaderLowering(Ctx);
 #include "llvm/Config/SZTargets.def"
 #undef SUBZERO_TARGET
   }
 }
 
 TargetHeaderLowering::~TargetHeaderLowering() = default;
 
 } // end of namespace Ice