[PATCH] D41693: [ARM][NFC] Avoid recreating MCSubtargetInfo in ARMAsmBackend

Wed Jan 3 02:20:16 PST 2018

asb created this revision.
asb added reviewers: fhahn, rengolin.
Herald added subscribers: kristof.beyls, javed.absar, aemerson.

After https://reviews.llvm.org/D41349, we can now directly access MCSubtargetInfo from createARM*AsmBackend. This patch makes use of this, avoiding the need to create a fresh MCSubtargetInfo (which was previously always done with a blank CPU and feature string). Given the total size of the change remains pretty tiny and we're removing the old explicit destructor, I changed the STI field to a reference rather than a pointer.

https://reviews.llvm.org/D41693

Files:
  lib/Target/ARM/MCTargetDesc/ARMAsmBackend.cpp
  lib/Target/ARM/MCTargetDesc/ARMAsmBackend.h
  lib/Target/ARM/MCTargetDesc/ARMAsmBackendDarwin.h
  lib/Target/ARM/MCTargetDesc/ARMAsmBackendELF.h
  lib/Target/ARM/MCTargetDesc/ARMAsmBackendWinCOFF.h
  lib/Target/ARM/MCTargetDesc/ARMMCTargetDesc.h

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