[all-commits] [llvm/llvm-project] 61f5ba: [SystemZ] Implement the packed stack layout

[Jonas Paulsson via All-commits]

  Branch: refs/heads/master
  Home:   https://github.com/llvm/llvm-project
  Commit: 61f5ba5c32fae2726d3ead5e7360c084720f4692
      https://github.com/llvm/llvm-project/commit/61f5ba5c32fae2726d3ead5e7360c084720f4692
  Author: Jonas Paulsson <paulsson at linux.vnet.ibm.com>
  Date:   2019-12-12 (Thu, 12 Dec 2019)

  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/SystemZMachineFunctionInfo.h
    M llvm/test/CodeGen/SystemZ/anyregcc-novec.ll
    M llvm/test/CodeGen/SystemZ/frame-02.ll
    M llvm/test/CodeGen/SystemZ/frame-03.ll
    M llvm/test/CodeGen/SystemZ/frame-04.ll
    M llvm/test/CodeGen/SystemZ/frame-19.ll
    M llvm/test/CodeGen/SystemZ/frame-20.ll
    A llvm/test/CodeGen/SystemZ/frame-22.ll

  Log Message:
  -----------
  [SystemZ]  Implement the packed stack layout

Any llvm function with the "packed-stack" attribute will be compiled to use
the packed stack layout which reuses unused parts of the incoming register
save area. This is needed for building the Linux kernel.

Review: Ulrich Weigand
https://reviews.llvm.org/D70821