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From: "jakub at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug middle-end/114552] [13/14 Regression] wrong code at -O1 and
 above on x86_64-linux-gnu since r13-990
Date: Tue, 02 Apr 2024 13:29:02 +0000
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X-Bugzilla-Keywords: wrong-code
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D114552

Jakub Jelinek <jakub at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
            Summary|[13/14 Regression] wrong    |[13/14 Regression] wrong
                   |code at -O1 and above on    |code at -O1 and above on
                   |x86_64-linux-gnu            |x86_64-linux-gnu since
                   |                            |r13-990
                 CC|                            |jakub at gcc dot gnu.org,
                   |                            |sayle at gcc dot gnu.org
           Keywords|needs-bisection             |

--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Further cleaned up testcase:

struct __attribute__((packed)) S { short b; int c; };
struct T { struct S b; int e; };
static const struct T k =3D { { 1, 0 }, 0 };

__attribute__((noinline)) void
foo (void)
{
  asm ("" : : : "memory");
}

__attribute__((noinline)) void
bar (struct S n)
{
  foo ();
}

int
main ()
{
  bar (k.b);
  return 0;
}

Started with r13-990-ged6fd2aed58f2cca99f15331bf68999c0e6df370=