[Bug 2025575] Re: [23.10 FEAT] [GNU2219] GCC Preserve register arguments support

[Matthias Klose]

reassigning to gcc-13, which will be the default GCC for 23.10.  We will
only pick up that one for gcc-12, if it is applied upstream in the
gcc-12 branch.

** Package changed: gcc-12 (Ubuntu) => gcc-13 (Ubuntu)

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Title:
  [23.10 FEAT] [GNU2219] GCC Preserve register arguments support

Status in Ubuntu on IBM z Systems:
  New
Status in gcc-13 package in Ubuntu:
  New

Bug description:
  Feature Description:

  Owing to performance concerns and in order to be able to access function arguments it is required:
    1. to store the argument register content to the stack
    2. generate proper CFI to allow the unwinder to locate it

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