[PATCH] D20830: Fix branch relaxation in 16-bit mode.

[Nirav Dave via llvm-commits]

niravd created this revision.
niravd added reviewers: craig.topper, dwmw2.
niravd added a subscriber: llvm-commits.
Herald added a reviewer: tstellarAMD.
Herald added subscribers: dsanders, jyknight, arsenm, jfb.

Thread through MCSubtargetInfo to relaxInstruction function allowing relaxation
to generate jumps with 16-bit sized immediates in 16-bit mode.

http://reviews.llvm.org/D20830

Files:
  include/llvm/MC/MCAsmBackend.h
  lib/MC/MCAssembler.cpp
  lib/MC/MCObjectStreamer.cpp
  lib/Target/AArch64/MCTargetDesc/AArch64AsmBackend.cpp
  lib/Target/AMDGPU/MCTargetDesc/AMDGPUAsmBackend.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.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
  test/MC/X86/x86-branch-relaxation.s

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