[all-commits] [llvm/llvm-project] 47efff: [SystemZ] Emit optional argument area length field...

[Kai Nacke via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 47efff777d907fcabda59d925dfed3040c7308be
      https://github.com/llvm/llvm-project/commit/47efff777d907fcabda59d925dfed3040c7308be
  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 (#169679)

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 reserved
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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