https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89711
Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |rguenth at gcc dot gnu.org
Assignee|marxin at gcc dot gnu.org |unassigned at gcc dot
gnu.org
--- Comment #2 from Martin Liška <marxin at gcc dot gnu.org> ---
The mentioned patch is responsible for preserving of ifunc resolver:
Bisecting latest revisions
0e35450b3c1d7164(30 Jun 2017 13:51): [took: 2.646s] result: OK
;; Function xd (xd.default.3, funcdef_no=0, decl_uid=1815, cgraph_uid=0,
symbol_order=0)
__attribute__((target ("default"), target_clones ("avx", "default")))
xd ()
{
<bb 2> [100.00%] [count: INV]:
return;
}
;; Function tx (tx.default.2, funcdef_no=1, decl_uid=1818, cgraph_uid=1,
symbol_order=1)
__attribute__((target ("default"), target_clones ("avx", "default")))
tx ()
{
<bb 2> [100.00%] [count: INV]:
return;
}
;; Function tx.avx.0 (tx.avx.0, funcdef_no=3, decl_uid=1832, cgraph_uid=3,
symbol_order=3)
__attribute__((target ("avx"), target_clones ("avx", "default")))
tx.avx.0 ()
{
<bb 2> [100.00%] [count: INV]:
return;
}
;; Function xd.avx.1 (xd.avx.1, funcdef_no=4, decl_uid=2147, cgraph_uid=4,
symbol_order=4)
__attribute__((target ("avx"), target_clones ("avx", "default")))
xd.avx.1 ()
{
<bb 2> [100.00%] [count: INV]:
return;
}
;; Function main (main, funcdef_no=2, decl_uid=1821, cgraph_uid=2,
symbol_order=2) (executed once)
main ()
{
<bb 2> [100.00%] [count: INV]:
return 0;
}
;; Function tx.resolver (tx.resolver, funcdef_no=6, decl_uid=2151,
cgraph_uid=6, symbol_order=6)
tx.resolver ()
{
int _3;
<bb 2> [100.00%] [count: INV]:
__builtin_cpu_init ();
_3 = __builtin_cpu_supports (&"avx"[0]);
if (_3 > 0)
goto <bb 3>; [64.00%] [count: INV]
else
goto <bb 4>; [36.00%] [count: INV]
<bb 3> [64.00%] [count: INV]:
return tx.avx.0;
<bb 4> [36.00%] [count: INV]:
return tx;
}
;; Function xd.resolver (xd.resolver, funcdef_no=8, decl_uid=2157,
cgraph_uid=10, symbol_order=10)
xd.resolver ()
{
int _3;
<bb 2> [100.00%] [count: INV]:
__builtin_cpu_init ();
_3 = __builtin_cpu_supports (&"avx"[0]);
if (_3 > 0)
goto <bb 3>; [64.00%] [count: INV]
else
goto <bb 4>; [36.00%] [count: INV]
<bb 3> [64.00%] [count: INV]:
return xd.avx.1;
<bb 4> [36.00%] [count: INV]:
return xd;
}
while before it was removed:
ac45aefc028a5546(30 Jun 2017 13:19): [took: 2.623s] result: OK
;; Function main (main, funcdef_no=2, decl_uid=1821, cgraph_uid=2,
symbol_order=2) (executed once)
main ()
{
<bb 2> [100.00%] [count: INV]:
return 0;
}
;; Function tx.avx.0 (tx.avx.0, funcdef_no=3, decl_uid=1832, cgraph_uid=3,
symbol_order=3)
__attribute__((target ("avx"), target_clones ("avx", "default")))
tx.avx.0 ()
{
<bb 2> [100.00%] [count: INV]:
return;
}
;; Function xd.avx.1 (xd.avx.1, funcdef_no=4, decl_uid=2147, cgraph_uid=4,
symbol_order=4)
__attribute__((target ("avx"), target_clones ("avx", "default")))
xd.avx.1 ()
{
<bb 2> [100.00%] [count: INV]:
return;
}
Thus I'm leaving that to Richi, it's probably IPA PTA issue.
