[PATCH] D125094: [ARM][Thumb] Command-line option to ensure AAPCS compliant Frame Records

[Lucas Prates via Phabricator via cfe-commits]

pratlucas updated this revision to Diff 439356.
pratlucas added a comment.

Fixing use-after-poison issue detected by ASAN buildbot.

When popping LR on thumb it's value is popped into PC and used as a return.
The original return instruction gets erased, invalidating the MachineInstr
iterator. This change makes sure we don't try to access the iterator in these
conditions.


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D125094/new/

https://reviews.llvm.org/D125094

Files:
  clang/include/clang/Driver/Options.td
  clang/lib/Driver/ToolChains/Arch/ARM.cpp
  llvm/lib/Target/ARM/ARM.td
  llvm/lib/Target/ARM/ARMBaseRegisterInfo.cpp
  llvm/lib/Target/ARM/ARMCallingConv.td
  llvm/lib/Target/ARM/ARMFrameLowering.cpp
  llvm/lib/Target/ARM/ARMFrameLowering.h
  llvm/lib/Target/ARM/ARMMachineFunctionInfo.h
  llvm/lib/Target/ARM/ARMSubtarget.h
  llvm/lib/Target/ARM/Thumb1FrameLowering.cpp
  llvm/lib/Target/ARM/ThumbRegisterInfo.cpp
  llvm/test/CodeGen/ARM/frame-chain-reserved-fp.ll
  llvm/test/CodeGen/ARM/frame-chain.ll
  llvm/test/CodeGen/Thumb/frame-access.ll
  llvm/test/CodeGen/Thumb/frame-chain-reserved-fp.ll
  llvm/test/CodeGen/Thumb/frame-chain.ll

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