[PATCH] D38051: [CodeGen] Emit necessary .note sections for -fsplit-stack

[Cherry Zhang via Phabricator via llvm-commits]

cherry created this revision.

According to https://gcc.gnu.org/wiki/SplitStacks, the linker expects a zero-sized .note.GNU-split-stack section if split-stack is used (and also .note.GNU-no-split-stack section if it also contains non-split-stack functions), so it can handle the cases where a split-stack function calls non-split-stack function.

      

This change adds the sections if needed.

Fixes PR #34670.


https://reviews.llvm.org/D38051

Files:
  include/llvm/CodeGen/MachineModuleInfo.h
  lib/CodeGen/AsmPrinter/AsmPrinter.cpp
  lib/CodeGen/MachineModuleInfo.cpp
  lib/CodeGen/PrologEpilogInserter.cpp
  test/CodeGen/X86/segmented-stacks.ll

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