[PATCH] R600: Add intrinsics for math helper instructions

[Matt Arsenault]

These will be used in the implementations of custom lowering of and library implementations of various math functions, so it's useful to expose these as builtins.

http://reviews.llvm.org/D4168

Files:
  include/llvm/IR/IntrinsicsR600.td
  lib/Target/R600/AMDGPUISelLowering.cpp
  lib/Target/R600/AMDGPUISelLowering.h
  lib/Target/R600/AMDGPUInstrInfo.td
  lib/Target/R600/AMDGPUInstructions.td
  lib/Target/R600/AMDGPUIntrinsics.td
  lib/Target/R600/SIInsertWaits.cpp
  lib/Target/R600/SIInstructions.td
  lib/Transforms/InstCombine/InstCombineCalls.cpp
  test/CodeGen/R600/llvm.AMDGPU.div_fixup.ll
  test/CodeGen/R600/llvm.AMDGPU.div_fmas.ll
  test/CodeGen/R600/llvm.AMDGPU.div_scale.ll
  test/CodeGen/R600/llvm.AMDGPU.rcp.ll
  test/CodeGen/R600/llvm.AMDGPU.trig_preop.ll
  test/Transforms/InstCombine/r600-intrinsics.ll
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