[PATCH] D91455: [XCOFF][AIX] Generate LSDA data and compact unwind section on AIX

[Jason Liu via Phabricator via llvm-commits]

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AIX uses the existing EH infrastructure in clang and llvm.
The major differences would be

1. AIX do not have CFI instructions.
2. AIX uses a new personality routine, named __xlcxx_personality_v1. It doesn't use the GCC personality rountine, because the intractability is not there yet on AIX.
3. AIX do not use eh_frame sections.  Instead, it would use a eh_info section (compat unwind section) to store the information about personality routine and LSDA data address.


https://reviews.llvm.org/D91455

Files:
  clang/lib/CodeGen/CGCleanup.h
  clang/lib/CodeGen/CGException.cpp
  clang/test/CodeGenCXX/personality.cpp
  llvm/include/llvm/Analysis/EHPersonalities.h
  llvm/include/llvm/CodeGen/AsmPrinter.h
  llvm/include/llvm/MC/MCTargetOptions.h
  llvm/lib/Analysis/EHPersonalities.cpp
  llvm/lib/CodeGen/AsmPrinter/AIXException.cpp
  llvm/lib/CodeGen/AsmPrinter/AsmPrinter.cpp
  llvm/lib/CodeGen/AsmPrinter/AsmPrinterDwarf.cpp
  llvm/lib/CodeGen/AsmPrinter/CMakeLists.txt
  llvm/lib/CodeGen/AsmPrinter/DwarfException.h
  llvm/lib/CodeGen/AsmPrinter/EHStreamer.cpp
  llvm/lib/CodeGen/TargetLoweringObjectFileImpl.cpp
  llvm/lib/CodeGen/TargetPassConfig.cpp
  llvm/lib/MC/MCAsmInfoXCOFF.cpp
  llvm/lib/MC/MCObjectFileInfo.cpp
  llvm/lib/Target/PowerPC/PPCAsmPrinter.cpp
  llvm/lib/Transforms/InstCombine/InstructionCombining.cpp
  llvm/test/CodeGen/PowerPC/aix-exception.ll

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