https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61033
Michael Collison <michael.collison at linaro dot org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Assignee|michael.collison at linaro dot org |mkuvyrkov at gcc dot
gnu.org
--- Comment #12 from Michael Collison <michael.collison at linaro dot org> ---
GCC is looping infinitely in attempting to solve a data flow problem in
vt_find_locations. My working theory is that compute_bb_dataflow is incorrectly
asserting some value has changed. I have reduced my case to a candidate set of
basic blocks and a (candiate) RTL location this is continually removed/added.
The rtl location is:
dataflow difference found: removal of:
name: D#255
offset 0
(mem/f/c:SI (value/u:SI 106:3955 @0x22cb2f8/0x23424a0) [3 result.d+0 S4
A32])
I understand that the argument to 'VALUE" is a cselib_val_struct but I don't
know how to map this back to a insn that is causing the problem. Any thoughts
on how I might debug thus further?
