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[Bug middle-end/39333] gcc 4.3.3 miscompiles when -finline-small-functions is used
- From: "galtgendo at o2 dot pl" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 22 Apr 2009 00:04:44 -0000
- Subject: [Bug middle-end/39333] gcc 4.3.3 miscompiles when -finline-small-functions is used
- References: <bug-39333-15488@http.gcc.gnu.org/bugzilla/>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Comment #20 from galtgendo at o2 dot pl 2009-04-22 00:04 -------
Created an attachment (id=17669)
--> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=17669&action=view)
prepocessed source of id.c
People, I've got a result, that's either very funny or very not funny.
With the same compiler, with the command "i686-pc-linux-gnu-gcc -std=gnu99 -O2
-march=athlon -mtune=athlon -pipe -fno-guess-branch-probability -I../lib -o id
id.c group-list.o libver.a ../lib/libcoreutils.a"
id.c from coreutils 7.2 gets miscompiled, resulting in "id -u" always printing
"id: cannot print "only" of more than one choice"
The "funny" part is that without "-fno-guess-branch-probability" it works
correctly, so it's the (sort of) opposite of above.
I will shortly test, if things change with gcc 4.4.0.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39333