[PATCH] D52099: [PPC64] Add split-stack support.

[Sean Fertile via Phabricator via llvm-commits]

sfertile created this revision.
sfertile added reviewers: ruiu, syzaara, saugustine.
Herald added subscribers: llvm-commits, kbarton, arichardson, nemanjai, emaste.
Herald added a reviewer: espindola.

This support is slightly different then the X86_64 implementation in that calls to __morestack don't need to get rewritten to calls to __moresatck_non_split when a split-stack caller calls a non-split-stack callee. Instead the size of the stack frame requested by the caller is adjusted  prior to the call to __morestack. The size the stack-frame will be adjusted by is tune-able through a new `--split-stack-adjust-size` option.


Repository:
  rLLD LLVM Linker

https://reviews.llvm.org/D52099

Files:
  ELF/Arch/PPC64.cpp
  ELF/Arch/X86_64.cpp
  ELF/Config.h
  ELF/Driver.cpp
  ELF/InputSection.cpp
  ELF/Options.td
  ELF/Target.cpp
  ELF/Target.h
  test/ELF/Inputs/ppc64-no-split-stack.s
  test/ELF/ppc64-split-stack-adjust-size-success.s
  test/ELF/ppc64-split-stack-prologue-adjust-success.s

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