http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46850
Summary: optimization of inline function leads to incorrect
integer comparison result
Product: gcc
Version: 4.4.5
Status: UNCONFIRMED
Severity: minor
Priority: P3
Component: c
AssignedTo: unassig...@gcc.gnu.org
ReportedBy: brad.k...@kitware.com
Created attachment 22686
--> http://gcc.gnu.org/bugzilla/attachment.cgi?id=22686
Bash script to reproduce bug
The output of the attached script is expected to be "0" but is "1".
Tested on GCC 4.4.5, Linux x86_64, but I believe it occurs elsewhere too and in
other versions.
At first I encountered the problem with -O2 but then narrowed it down to
-O -fstrict-overflow -foptimize-sibling-calls -ftree-vrp
as shown in the script. Adding
-fno-guess-branch-probability
fixes the problem. Removing "inline" from the function fixes the problem.
