Subzero. Moar performance tweaks.

src/IceDefs.h

 //===- subzero/src/IceDefs.h - Common Subzero declarations ------*- C++ -*-===//
 //
 //                        The Subzero Code Generator
 //
 // This file is distributed under the University of Illinois Open Source
 // License. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
 ///
 /// \file
 /// \brief Declares various useful types and classes that have widespread use
 /// across Subzero.
 ///
 //===----------------------------------------------------------------------===//
 
 #ifndef SUBZERO_SRC_ICEDEFS_H
 #define SUBZERO_SRC_ICEDEFS_H
 
 #include "IceBuildDefs.h" // TODO(stichnot): move into individual files
 #include "IceMemory.h"
 #include "IceTLS.h"
 
 #include "llvm/ADT/ArrayRef.h"
-#include "llvm/ADT/BitVector.h"
 #include "llvm/ADT/ilist.h"
 #include "llvm/ADT/ilist_node.h"
 #include "llvm/ADT/iterator_range.h"
 #include "llvm/ADT/SmallVector.h"
 #include "llvm/ADT/STLExtras.h"
 #include "llvm/Support/Casting.h"
 #include "llvm/Support/ELF.h"
 #include "llvm/Support/raw_ostream.h"
 
 #include <cassert>
 #include <cstdint>
 #include <cstdio>     // snprintf
 #include <functional> // std::less
 #include <limits>
 #include <list>
 #include <map>
 #include <memory>
 #include <mutex>
 #include <string>
 #include <system_error>
 #include <unordered_map>
 #include <unordered_set>
 #include <utility>
 #include <vector>
 
 namespace Ice {
 
 class Assembler;
+class BitVector;
 class Cfg;
 class CfgNode;
 class Constant;
 class ELFObjectWriter;
 class ELFStreamer;
 class FunctionDeclaration;
 class GlobalContext;
 class GlobalDeclaration;
 class Inst;
 class InstAssign;
@@ skipping 85 matching lines @@
 
 /// InstNumberT is for holding an instruction number. Instruction numbers are
 /// used for representing Variable live ranges.
 using InstNumberT = int32_t;
 
 /// A LiveBeginEndMapEntry maps a Variable::Number value to an Inst::Number
 /// value, giving the instruction number that begins or ends a variable's live
 /// range.
 using LiveBeginEndMapEntry = std::pair<SizeT, InstNumberT>;
 using LiveBeginEndMap = CfgVector<LiveBeginEndMapEntry>;
-using LivenessBV = llvm::BitVector;
+using LivenessBV = BitVector;
 
 using TimerStackIdT = uint32_t;
 using TimerIdT = uint32_t;
 
 /// Use alignas(MaxCacheLineSize) to isolate variables/fields that might be
 /// contended while multithreading. Assumes the maximum cache line size is 64.
 enum { MaxCacheLineSize = 64 };
 // Use ICE_CACHELINE_BOUNDARY to force the next field in a declaration
 // list to be aligned to the next cache line.
 // Note: zero is added to work around the following GCC 4.8 bug (fixed in 4.9):
@@ skipping 108 matching lines @@
   RPE_PooledConstantReordering,
   RPE_RegAllocRandomization,
   RPE_num
 };
 
 using RelocOffsetArray = llvm::SmallVector<class RelocOffset *, 4>;
 
 } // end of namespace Ice
 
 #endif // SUBZERO_SRC_ICEDEFS_H