[all-commits] [llvm/llvm-project] 653b97: [SystemZ] Improve handling of backchain offset.

[Jonas Paulsson via All-commits]

  Branch: refs/heads/master
  Home:   https://github.com/llvm/llvm-project
  Commit: 653b97690f0d5c26a93002fb94ddd86397ed6c1c
      https://github.com/llvm/llvm-project/commit/653b97690f0d5c26a93002fb94ddd86397ed6c1c
  Author: Jonas Paulsson <paulsson at linux.vnet.ibm.com>
  Date:   2020-12-14 (Mon, 14 Dec 2020)

  Changed paths:
    M llvm/lib/Target/SystemZ/SystemZFrameLowering.cpp
    M llvm/lib/Target/SystemZ/SystemZFrameLowering.h
    M llvm/lib/Target/SystemZ/SystemZISelLowering.cpp
    M llvm/lib/Target/SystemZ/SystemZISelLowering.h
    M llvm/test/CodeGen/SystemZ/backchain.ll

  Log Message:
  -----------
  [SystemZ] Improve handling of backchain offset.

- New function SDValue getBackchainAddress() used by
  lowerDYNAMIC_STACKALLOC() and lowerSTACKRESTORE() to properly handle the
  backchain offset also with packed-stack.

- Make a common function getBackchainOffset() for the computation of the
  backchain offset and use in some places (NFC).

Review: Ulrich Weigand

Differential Revision: https://reviews.llvm.org/D93171