https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78200
--- Comment #7 from Venkataramanan <venkataramanan.kumar at amd dot com> ---
Bisecting shows non canonical gimple generation at r238370.
--snip--
commit f3dce1cdd016e16cf9dc051d127bdf6eb58430fc
Author: rguenth <rguenth@138bc75d-0d04-0410-961f-82ee72b054a4>
Date: Fri Jul 15 10:53:29 2016 +0000
2016-07-15 Richard Biener <rguent...@suse.de>
* tree-ssa-pre.c (get_representative_for): Make sure to return
the value number of SSA names.
(phi_translate_1): get_representative_for cannot return NULL.
(do_pre_regular_insertion): Remove redundant call to
fully_constant_expression.
(do_pre_partial_partial_insertion): Likewise.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@238370
138bc75d-0d04-0410-961f-82ee72b054a4
--snip--
r238370 test.c.148t.ifcvt
;; basic block 30, loop depth 1, count 0, freq 407, maybe hot
;; prev block 29, next block 31, flags: (NEW, REACHABLE)
;; pred: 28 [64.0%] (FALSE_VALUE,EXECUTABLE)
_71 = _109 == 2;
_15 = if_conversion_var_108 > 0;
_70 = _71 & _15;
if (_70 != 0)
goto <bb 31>;
else
goto <bb 32>;
r238369 test.c.148t.ifcvt
;; basic block 30, loop depth 1, count 0, freq 407, maybe hot
;; prev block 29, next block 31, flags: (NEW, REACHABLE)
;; pred: 28 [64.0%] (FALSE_VALUE,EXECUTABLE)
_26 = _73 == 2;
_38 = if_conversion_var_72 > 0;
_86 = _26 & _38;
if (_86 != 0)
goto <bb 31>;
else
goto <bb 32>;
;; succ: 31 [34.0%] (TRUE_VALUE,EXECUTABLE)
;; 32 [66.0%] (FALSE_VALUE,EXECUTABLE)
