https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85608
Bug ID: 85608
Summary: ubsan in cse.c:2194
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
Reporter: dcb314 at hotmail dot com
Target Milestone: ---
From the gcc testsuite, the file gcc.dg/pr82596.c, when compiled
by a recent ubsan version of trunk gcc, does this:
$ ~/gcc/results.259742.ubsan/bin/gcc -c -O2 -w ./gcc.dg/pr82596.c
../../trunk/gcc/cse.c:2194:34: runtime error: signed integer overflow: 1 -
-9223372036854775807 cannot be represented in type 'long int'
$
case.c:2194 is this line:
360 kenner offset = (get_integer_term (x) - get_integer_term
(p->exp));
I'll have my usual go at finding a range of revisions and a short test case.
