https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63443
Bug ID: 63443
Summary: copyrename2 introducing bogus profile counts
Product: gcc
Version: 5.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: middle-end
Assignee: unassigned at gcc dot gnu.org
Reporter: tejohnson at google dot com
This problem showed up in https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63422,
where a new assert introduced in jump threading triggered because of insane
profile counts coming in. The LTO test case attached to that bug has profile
data, but the affected routine did not have profile counts and only frequencies
(main() from mozilla-xremote-client.ii which does not have a gcda file).
However, copyrename2 introduced some non-zero profile counts, which should not
happen.
To duplicate:
% g++ -flto -fprofile-use -fno-exceptions -std=gnu++0x -O2
mozilla-xremote-client.ii XRemoteClient.ii
I've attached the input files to this bug report as well.
