[PATCH] D21374: [RFC] Generate long nop instructions depending on function-specific subtarget info

[Andrey Turetskiy via llvm-commits]

aturetsk created this revision.
aturetsk added reviewers: echristo, bruno, RKSimon.
aturetsk added a subscriber: llvm-commits.
Herald added a reviewer: tstellarAMD.
Herald added subscribers: mehdi_amini, dsanders, jyknight, dschuff, arsenm, jfb.

Store function-specific subtarget info in MCFragments during machine function pass AspPrinter and later write long nop instructions in MCAssembler depending on this info.

http://reviews.llvm.org/D21374

Files:
  include/llvm/CodeGen/AsmPrinter.h
  include/llvm/MC/MCAsmBackend.h
  include/llvm/MC/MCFragment.h
  lib/CodeGen/AsmPrinter/AsmPrinter.cpp
  lib/MC/MCAssembler.cpp
  lib/MC/MCFragment.cpp
  lib/Target/AArch64/MCTargetDesc/AArch64AsmBackend.cpp
  lib/Target/AMDGPU/AMDGPUAsmPrinter.cpp
  lib/Target/AMDGPU/MCTargetDesc/AMDGPUAsmBackend.cpp
  lib/Target/ARM/ARMAsmPrinter.cpp
  lib/Target/ARM/MCTargetDesc/ARMAsmBackend.cpp
  lib/Target/ARM/MCTargetDesc/ARMAsmBackend.h
  lib/Target/BPF/MCTargetDesc/BPFAsmBackend.cpp
  lib/Target/Hexagon/MCTargetDesc/HexagonAsmBackend.cpp
  lib/Target/Lanai/MCTargetDesc/LanaiAsmBackend.cpp
  lib/Target/Mips/MCTargetDesc/MipsAsmBackend.cpp
  lib/Target/Mips/MCTargetDesc/MipsAsmBackend.h
  lib/Target/PowerPC/MCTargetDesc/PPCAsmBackend.cpp
  lib/Target/Sparc/MCTargetDesc/SparcAsmBackend.cpp
  lib/Target/SystemZ/MCTargetDesc/SystemZMCAsmBackend.cpp
  lib/Target/WebAssembly/MCTargetDesc/WebAssemblyAsmBackend.cpp
  lib/Target/X86/MCTargetDesc/X86AsmBackend.cpp
  lib/Target/X86/X86AsmPrinter.cpp
  test/CodeGen/X86/func-specific-nops.ll

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