https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79958
Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Last reconfirmed|2017-03-10 00:00:00 |2021-8-14
Severity|normal |enhancement
--- Comment #4 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
With the reduced testcase in comment #2 and -O2 -fno-tree-dce we still get:
x.i = 1;
if (b_3(D) != 0)
goto <bb 3>; [0.04%]
else
goto <bb 4>; [99.96%]
<bb 3> [local count: 429496]:
bar ();
__builtin_abort ();
<bb 4> [local count: 1073312329]:
bar (); [tail call]
x ={v} {CLOBBER};
As Richi mentioned tree level DCE can figure it out for the reduced testcase
while DSE cannot.
