[PATCH] D67216: [cfi] Add flag to always generate call frame information

[David Candler via Phabricator via cfe-commits]

dcandler created this revision.
dcandler added reviewers: echristo, probinson, aprantl.
Herald added subscribers: llvm-commits, cfe-commits, hiraditya, kristof.beyls, javed.absar.
Herald added projects: clang, LLVM.

This adds a flag to LLVM and clang to always generate call frame information, even if other debug information is not being generated. This would be useful for the Arm toolchain where the .debug_frame section is always expected to be present (with or without other debug sections) and can be used to calculate stack usage, although the flag itself has been left generic to cover any other potential situations where cfi directives are desired, but other debug information is not.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D67216

Files:
  clang/include/clang/Basic/CodeGenOptions.def
  clang/include/clang/Driver/Options.td
  clang/lib/Driver/ToolChains/Clang.cpp
  clang/lib/Frontend/CompilerInvocation.cpp
  clang/test/Driver/always-need-cfi.c
  llvm/docs/CommandGuide/llc.rst
  llvm/lib/CodeGen/AsmPrinter/AsmPrinter.cpp
  llvm/test/CodeGen/ARM/always-need-cfi.ll

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