[all-commits] [llvm/llvm-project] e88f8a: [SystemZ] Emit optional argument area length field

[Kai Nacke via All-commits]

  Branch: refs/heads/users/redstar/argarea
  Home:   https://github.com/llvm/llvm-project
  Commit: e88f8ae98f7c7409be8f383d0968023ef6294a00
      https://github.com/llvm/llvm-project/commit/e88f8ae98f7c7409be8f383d0968023ef6294a00
  Author: Kai Nacke <kai.peter.nacke at ibm.com>
  Date:   2025-11-26 (Wed, 26 Nov 2025)

  Changed paths:
    M llvm/lib/Target/SystemZ/SystemZAsmPrinter.cpp
    A llvm/test/CodeGen/SystemZ/zos-ppa1-argarea.ll

  Log Message:
  -----------
  [SystemZ] Emit optional argument area length field

The Language Environment (LE) reserves 128 byte for the
argument area when the optional field is not present. If
the argument area is larger, then the field must be present
to guarantee that the space is reseverd on stack
extension. Creating this field when alloca() is used may
reduce the needed stack space in case alloca() causes a
stack extension.



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