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Subject: [Bug debug/110308] [14 Regression] ICE on audiofile-0.3.6: RTL:
 vartrack: Segmentation fault in mode_to_precision(machine_mode)
Date: Wed, 28 Jun 2023 14:06:41 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D110308

--- Comment #15 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Philipp Tomsich <ptomsich@gcc.gnu.org=
>:

https://gcc.gnu.org/g:893883f2f8f56984209c6ed210ee992ff71a14b0

commit r14-2165-g893883f2f8f56984209c6ed210ee992ff71a14b0
Author: Manolis Tsamis <manolis.tsamis@vrull.eu>
Date:   Tue Jun 20 16:23:52 2023 +0200

    cprop_hardreg: fix ORIGINAL_REGNO/REG_ATTRS/REG_POINTER handling

    Fixes: 6a2e8dcbbd4bab3

    Propagation for the stack pointer in regcprop was enabled in
    6a2e8dcbbd4bab3, but set ORIGINAL_REGNO/REG_ATTRS/REG_POINTER for
    stack_pointer_rtx which caused regression (e.g., PR 110313, PR 110308).

    This fix adds special handling for stack_pointer_rtx in the places
    where maybe_mode_change is called. This also adds an check in
    maybe_mode_change to return the stack pointer only when the requested
    mode matches the mode of stack_pointer_rtx.

            PR debug/110308

    gcc/ChangeLog:

            * regcprop.cc (maybe_mode_change): Check stack_pointer_rtx mode.
            (maybe_copy_reg_attrs): New function.
            (find_oldest_value_reg): Use maybe_copy_reg_attrs.
            (copyprop_hardreg_forward_1): Ditto.

    gcc/testsuite/ChangeLog:

            * g++.dg/torture/pr110308.C: New test.

    Signed-off-by: Manolis Tsamis <manolis.tsamis@vrull.eu>
    Signed-off-by: Philipp Tomsich <philipp.tomsich@vrull.eu>=