[Bug middle-end/107498] Wrong optimization leads to unaligned access when compiling OpenLDAP

[glaubitz at physik dot fu-berlin.de]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=107498

--- Comment #8 from John Paul Adrian Glaubitz <glaubitz at physik dot fu-berlin.de> ---
(In reply to Eric Botcazou from comment #5)
> Can anyone print the value of mp in the debugger?

glaubitz@gcc202:~/openldap/tests$ gdb --args
/home/glaubitz/openldap/servers/slapd/slapd -Ta -d 0 -f
/home/glaubitz/openldap/tests/testrun/slapadd.conf -l
./testdata/test-ordered.ldif
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Reading symbols from /home/glaubitz/openldap/servers/slapd/slapd...
(gdb) r
Starting program: /home/glaubitz/openldap/servers/slapd/slapd -Ta -d 0 -f
/home/glaubitz/openldap/tests/testrun/slapadd.conf -l
./testdata/test-ordered.ldif

Program received signal SIGILL, Illegal instruction.
0xfff8000100e44320 in ?? ()
(gdb) c
Continuing.

Program received signal SIGBUS, Bus error.
0x00000100000ceda4 in mdb_node_add (mc=0x100004327b8, indx=<optimized out>,
key=0x7feffffe0a0, data=0x7feffffe090, pgno=0, flags=0) at
./../../../libraries/liblmdb/mdb.c:7366
7366            mp->mp_lower += sizeof(indx_t);
(gdb) p mp
$1 = (MDB_page *) 0x10000463caa
(gdb)