[Bug target/109109] [13 Regression] mariadb fails in tests on i586 (non-LTO mode) after r13-4435-g2c089640279614e3

["jakub at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109109

--- Comment #13 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
(In reply to Martin Liška from comment #12)
> So the problem happens here:
> 
> static
> uint32_t
> trx_undo_free_page(
> 
>  trx_rseg_t* rseg,
>  bool in_history,
> 
>  uint32_t hdr_page_no,
>  uint32_t page_no,
> 
>  mtr_t* mtr,
> 
> 
>  dberr_t* err)
> {
>  do { if (__builtin_expect(!(ulint) (hdr_page_no != page_no), (0))) {
> ut_dbg_assertion_failed("hdr_page_no != page_no",
> "/home/abuild/rpmbuild/BUILD/mariadb-10.11.2/storage/innobase/trx/trx0undo.
> cc", 744); } } while (0);
> 
>  buf_block_t* undo_block = buf_page_get_gen(page_id_t(rseg->space->id,
>             page_no),
>          0, RW_X_LATCH, nullptr,
>          10, mtr, err);
>  if (__builtin_expect(!undo_block, (0))) {
>   return 0xFFFFFFFFU;
>  }
>  buf_block_t* header_block = buf_page_get_gen(page_id_t(rseg->space->id,
>               hdr_page_no), <---- HERE
>            0, RW_X_LATCH, nullptr,
>            10, mtr, err);
>  if (__builtin_expect(!header_block, (0))) {
>   return 0xFFFFFFFFU;
>  }
> ...
> 
> the function arguments are:
> #1  0x570e8874 in trx_undo_free_page (rseg=0x57a56c40 <trx_sys+16768>,
> in_history=false, hdr_page_no=807, page_no=817, mtr=0xef4ac434,
> err=0xef4ac3dc) at /tmp/trxundo.ii:181925
> 
> and the construction of:
> page_id_t(rseg->space->id, hdr_page_no)
> ends in callee (buf_page_get_gen) with the argument:
> 
> (gdb) p page_id
> $5 = {m_id = 0}
> 
> while in good run it should be {m_id = 807} !

Ok, can you please print *rseg , rseg->space[0], *mtr and *err at the start of
the function, so that I can try to construct a self-contained testcase?
I assume both buf_page_get_gen return something non-NULL and it doesn't really
matter otherwise what for the reproducer, since e.g. all the further calls can
be noipa handled as completely dummy or even exit (0).