[PATCH] D78717: [SystemZ] Implement -fstack-clash-protection

[Jonas Paulsson via Phabricator via llvm-commits]

jonpa updated this revision to Diff 268419.
jonpa added a comment.

- Patch rebased (using cfiDefCfaOffset() instead of createDefCfaOffset()).

- Check for a free probe (STMG) in prologue in which case probing is not done when the space between that STMG and the new stack pointer is less than the probe size. This saves the vast majority of the probing (removes 95% of the CG instructions and 90% of the number of files changed).


CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D78717/new/

https://reviews.llvm.org/D78717

Files:
  clang/docs/ReleaseNotes.rst
  clang/lib/Basic/Targets/SystemZ.h
  clang/lib/Driver/ToolChains/Clang.cpp
  clang/test/CodeGen/stack-clash-protection.c
  clang/test/Driver/stack-clash-protection-02.c
  llvm/include/llvm/ADT/Triple.h
  llvm/lib/Target/SystemZ/SystemZFrameLowering.cpp
  llvm/lib/Target/SystemZ/SystemZFrameLowering.h
  llvm/lib/Target/SystemZ/SystemZISelLowering.cpp
  llvm/lib/Target/SystemZ/SystemZISelLowering.h
  llvm/lib/Target/SystemZ/SystemZInstrInfo.cpp
  llvm/lib/Target/SystemZ/SystemZInstrInfo.h
  llvm/lib/Target/SystemZ/SystemZInstrInfo.td
  llvm/lib/Target/SystemZ/SystemZOperators.td
  llvm/test/CodeGen/SystemZ/stack-clash-dynamic-alloca.ll
  llvm/test/CodeGen/SystemZ/stack-clash-protection.ll

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