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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug debug/108996] Proposal for adding DWARF call site information
 in GCC with -O0
Date: Fri, 03 Mar 2023 08:37:58 +0000
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X-Bugzilla-Version: 13.0
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D108996

Richard Biener <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Last reconfirmed|                            |2023-03-03
     Ever confirmed|0                           |1
             Status|UNCONFIRMED                 |NEW
                 CC|                            |aoliva at gcc dot gnu.org,
                   |                            |jakub at gcc dot gnu.org
           Severity|normal                      |enhancement
            Version|unknown                     |13.0

--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
It might be possible to run a reduced dataflow var-tracking at -O0 for this
kind of things (the target could provide a set of interesting entry/exit
parameters/registers to track).  For other targets the biggest issue is when
debugging the prologue code.

I'm not sure how easy it would be to run var-tracking for a subset of
insns/regs and how to then make use of such partial information when
outputting DWARF.

Alex/Jakub might have some ideas.=