https://gcc.gnu.org/bugzilla/show_bug.cgi?id=62262
Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2014-08-26
Ever confirmed|0 |1
--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
(insn 27 26 40 5 (set (reg:SI 73 [ D.2590 ])
(and:SI (ashift:SI (reg/v:SI 74 [ value ])
(const_int 32 [0x20]))
(const_int 8388607 [0x7fffff]))) t7.c:13 611 {*andim_ashiftsi_bfiz}
(expr_list:REG_DEAD (reg/v:SI 74 [ value ])
(nil)))
Confirmed.
"exact_log2 ((INTVAL (operands[3]) >> INTVAL (operands[2])) + 1) >= 0
&& (INTVAL (operands[3]) & ((1 << INTVAL (operands[2])) - 1)) == 0"
In fact we invoke undefined behavior inside the compiler too due to the shift
there.
