Add support for vector types and vector constants.

src/IceDefs.h

 //===- subzero/src/IceDefs.h - Common Subzero declaraions -------*- C++ -*-===//
 //
 //                        The Subzero Code Generator
 //
 // This file is distributed under the University of Illinois Open Source
 // License. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
 //
 // This file declares various useful types and classes that have
@@ skipping 11 matching lines @@
 #include <cstdio>     // snprintf
 #include <functional> // std::less
 #include <list>
 #include <map>
 #include <set>
 #include <string>
 #include <vector>
 
 #include "llvm/ADT/BitVector.h"
 #include "llvm/ADT/SmallBitVector.h"
+#include "llvm/ADT/SmallVector.h"
 #include "llvm/ADT/STLExtras.h"
 #include "llvm/Support/Casting.h"
 #include "llvm/Support/Compiler.h" // LLVM_STATIC_ASSERT
 #include "llvm/Support/raw_ostream.h"
 #include "llvm/Support/Timer.h"
 
 // Roll our own static_assert<> in the absence of C++11.  TODO: change
 // to static_assert<> with C++11.
 template <bool> struct staticAssert;
 template <> struct staticAssert<true> {}; // only true is defined
@@ skipping 15 matching lines @@
 class Variable;
 
 // TODO: Switch over to LLVM's ADT container classes.
 // http://llvm.org/docs/ProgrammersManual.html#picking-the-right-data-structure-for-a-task
 typedef std::string IceString;
 typedef std::list<Inst *> InstList;
 typedef std::list<InstPhi *> PhiList;
 typedef std::vector<Variable *> VarList;
 typedef std::vector<CfgNode *> NodeList;
 typedef std::vector<Constant *> ConstantList;
+typedef std::vector<IceString> StringList;
+// TODO(wala): Switch to std::array after C++11
+typedef llvm::SmallVector<char, 16> Vect128;
+typedef llvm::SmallVector<bool, 16> BitVect;

[jvoung (off chromium), 2014/06/26 00:45:40]

LLVM actually has a separate SmallBitVector<>:
http://llvm.org/docs/ProgrammersManual.html#smallbitvector
which is already being used in a few places in subzero.

Or was there a reason to stick with smallvector instead?

[wala, 2014/06/26 17:32:42]

SmallVector has operator<. SmallBitVector does not.

Constants are pooled using the TypePool<> class which stores the constant's
value as part of a key in an internal map. Map keys need to ordered.

 
 // SizeT is for holding small-ish limits like number of source
 // operands in an instruction.  It is used instead of size_t (which
 // may be 64-bits wide) when we want to save space.
 typedef uint32_t SizeT;
 
 // InstNumberT is for holding an instruction number.  Instruction
 // numbers are used for representing Variable live ranges.
 typedef int32_t InstNumberT;
 
@@ skipping 63 matching lines @@
 
 private:
   const llvm::TimeRecord Start;
   Timer(const Timer &) LLVM_DELETED_FUNCTION;
   Timer &operator=(const Timer &) LLVM_DELETED_FUNCTION;
 };
 
 } // end of namespace Ice
 
 #endif // SUBZERO_SRC_ICEDEFS_H