[PATCH] D62686: [RISCV] Add support for save/restore of callee-saved registers via libcalls

[Lewis Revill via Phabricator via cfe-commits]

lewis-revill updated this revision to Diff 225230.
lewis-revill added a comment.

Disable the save/restore optimization when a function contains tail calls. Address various miscellaneous concerns with the patch. Update tests to include less redundant code when checking cases where save/restore libcalls are not used.


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D62686/new/

https://reviews.llvm.org/D62686

Files:
  clang/lib/Driver/ToolChains/Arch/RISCV.cpp
  clang/test/Driver/riscv-features.c
  llvm/lib/Target/RISCV/RISCV.td
  llvm/lib/Target/RISCV/RISCVFrameLowering.cpp
  llvm/lib/Target/RISCV/RISCVFrameLowering.h
  llvm/lib/Target/RISCV/RISCVMachineFunctionInfo.h
  llvm/lib/Target/RISCV/RISCVRegisterInfo.cpp
  llvm/lib/Target/RISCV/RISCVRegisterInfo.h
  llvm/lib/Target/RISCV/RISCVSubtarget.h
  llvm/test/CodeGen/RISCV/saverestore.ll

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