[PATCH] D92396: [ARM] Implement harden-sls-retbr for Thumb mode

[Kristof Beyls via Phabricator via llvm-commits]

kristof.beyls created this revision.
kristof.beyls added a reviewer: ostannard.
Herald added subscribers: llvm-commits, danielkiss, hiraditya.
Herald added a project: LLVM.
kristof.beyls requested review of this revision.

The only non-trivial consideration in this patch is that the formation
of TBB/TBH instructions, which is done in the constant island pass, does
not understand the speculation barriers inserted by the SLSHardening
pass. As such, when harden-sls-retbr is enabled for a function, the
formation of TBB/TBH instructions in the constant island pass is
disabled.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D92396

Files:
  llvm/lib/Target/ARM/ARMAsmPrinter.cpp
  llvm/lib/Target/ARM/ARMBaseInstrInfo.cpp
  llvm/lib/Target/ARM/ARMBaseInstrInfo.h
  llvm/lib/Target/ARM/ARMConstantIslandPass.cpp
  llvm/lib/Target/ARM/ARMInstrThumb2.td
  llvm/lib/Target/ARM/ARMSLSHardening.cpp
  llvm/test/CodeGen/ARM/speculation-hardening-sls.ll

-------------- next part --------------
A non-text attachment was scrubbed...
Name: D92396.308667.patch
Type: text/x-patch
Size: 8415 bytes
Desc: not available
URL: <http://lists.llvm.org/pipermail/llvm-commits/attachments/20201201/9c3a8df5/attachment.bin>