[all-commits] [llvm/llvm-project] 237625: [SystemZ] Bugfix for backchain with packed-stack

[Jonas Paulsson via All-commits]

  Branch: refs/heads/master
  Home:   https://github.com/llvm/llvm-project
  Commit: 237625757a1f4a42c2efcf4bb16419a07f74e196
      https://github.com/llvm/llvm-project/commit/237625757a1f4a42c2efcf4bb16419a07f74e196
  Author: Jonas Paulsson <paulsson at linux.vnet.ibm.com>
  Date:   2020-03-03 (Tue, 03 Mar 2020)

  Changed paths:
    M llvm/lib/Target/SystemZ/SystemZFrameLowering.cpp
    A llvm/test/CodeGen/SystemZ/frame-25.ll

  Log Message:
  -----------
  [SystemZ]  Bugfix for backchain with packed-stack

The incoming back chain slot was implicitly allocated whenever a GPR was
saved in SystemZFrameLowering::getRegSpillOffset(), but in cases where no
GPRs were saved/restored this did not take effect.

Review: Ulrich Weigand

Differential Revision: https://reviews.llvm.org/D75367