[Bug 1890435]

[Cvs-commit]

The master branch has been updated by Richard Biener
<rguenth at gcc.gnu.org>:

https://gcc.gnu.org/g:556e25f0e9abc720c940994bd9a1491062933d49

commit r15-7829-g556e25f0e9abc720c940994bd9a1491062933d49
Author: Richard Biener <rguenther at suse.de>
Date:   Tue Mar 4 16:13:09 2025 +0100

    middle-end/97323 - TYPE_CANONICAL vs. ARRAY_TYPE modes
    
    For strict-alignment targets we can end up with BLKmode single-element
    array types when the element type is unaligned.  This confuses
    type checking since the canonical type would have an aligned
    element type and a non-BLKmode mode.  The following simply ignores
    the mode we assign to array types for this purpose, like we already
    do for record and union types.
    
            PR middle-end/97323
            * tree.cc (gimple_canonical_types_compatible_p): Ignore
            TYPE_MODE also for ARRAY_TYPE.
            (verify_type): Likewise.
    
            * gcc.dg/pr97323.c: New testcase.

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https://bugs.launchpad.net/bugs/1890435

Title:
  gcc-10 breaks on armhf (flaky): internal compiler error: Segmentation
  fault

Status in gcc:
  Confirmed
Status in gcc-10 package in Ubuntu:
  Confirmed

Bug description:
  Hi,
  this could be the same as bug 1887557 but as I don't have enough data I'm filing it as individual issue for now.

  I have only seen this happening on armhf so far.
  In 2 of 5 groovy builds of qemu 5.0 this week I have hit the issue, but it is flaky.

  Flakyness:
  1. different file
  first occurrence
  /<<PKGBUILDDIR>>/target/s390x/excp_helper.c:544:1: internal compiler error: Segmentation fault
  second occurrence
  /<<PKGBUILDDIR>>/linux-user/syscall.c:12479:1: internal compiler error: Segmentation fault

  Being so unreliable I can't provide mcuh more yet.
  I filed it mostly for awareness and so that I can be dup'ed onto the right but if there is a better one.

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