[PATCH] Address Space Casting

[Michele Scandale]

  New version of the patch:
  *  remove modification of C-bindings LLVMOpcode enumeration
  *  fixed constant folding failure: IntToPtr of PtrToInt is folded into a bitcast iff the int size is greater than the ptr size and the address spaces are the same. If there's an address space mismatch the sequence cannot be simplified because the semantic is totally target dependent.

  I'll wait for feedback.

  Thanks again.

  Regards,
  -Michele

Hi arsenm, villmow, theraven,

http://llvm-reviews.chandlerc.com/D1401

CHANGE SINCE LAST DIFF
  http://llvm-reviews.chandlerc.com/D1401?vs=3584&id=3972#toc

Files:
  include/llvm-c/Core.h
  include/llvm/AutoUpgrade.h
  include/llvm/Bitcode/LLVMBitCodes.h
  include/llvm/CodeGen/ISDOpcodes.h
  include/llvm/CodeGen/SelectionDAG.h
  include/llvm/CodeGen/SelectionDAGNodes.h
  include/llvm/IR/Constants.h
  include/llvm/IR/IRBuilder.h
  include/llvm/IR/Instruction.def
  include/llvm/IR/Instructions.h
  include/llvm/InstVisitor.h
  include/llvm/Target/TargetLowering.h
  lib/Analysis/ConstantFolding.cpp
  lib/AsmParser/LLLexer.cpp
  lib/AsmParser/LLParser.cpp
  lib/AsmParser/LLToken.h
  lib/Bitcode/Reader/BitcodeReader.cpp
  lib/Bitcode/Writer/BitcodeWriter.cpp
  lib/CodeGen/SelectionDAG/SelectionDAG.cpp
  lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
  lib/CodeGen/SelectionDAG/SelectionDAGBuilder.h
  lib/CodeGen/SelectionDAG/SelectionDAGDumper.cpp
  lib/CodeGen/TargetLoweringBase.cpp
  lib/IR/AutoUpgrade.cpp
  lib/IR/ConstantFold.cpp
  lib/IR/Constants.cpp
  lib/IR/Core.cpp
  lib/IR/Instruction.cpp
  lib/IR/Instructions.cpp
  lib/IR/Verifier.cpp
  lib/Target/NVPTX/NVPTXGenericToNVVM.cpp
  lib/Target/X86/X86CodeEmitter.cpp
  lib/Target/X86/X86ISelLowering.cpp
  lib/Target/X86/X86ISelLowering.h
  test/Other/constant-fold-gep.ll
  test/Transforms/InstCombine/2012-07-30-addrsp-bitcast.ll
  test/Transforms/InstCombine/constant-fold-address-space-pointer.ll
  unittests/IR/InstructionsTest.cpp
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