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From: "matt at use dot net" <gcc-bugzilla@gcc.gnu.org> To: gcc-bugs@gcc.gnu.org Subject: [Bug middle-end/51544] New: uninitialized variable false positive prevents bootstrap at -O3 Date: Wed, 14 Dec 2011 00:58:00 -0000 [thread overview] Message-ID: <bug-51544-4@http.gcc.gnu.org/bugzilla/> (raw) http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51544 Bug #: 51544 Summary: uninitialized variable false positive prevents bootstrap at -O3 Classification: Unclassified Product: gcc Version: 4.7.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: middle-end AssignedTo: unassigned@gcc.gnu.org ReportedBy: matt@use.net I checked by hand, and this looks like a false positive to me. It doesn't come up without -O[3,fast]. NOTE: I have hand-modified my build/bootstrap-lto.mk to use -Ofast. It's possible that using the bootstrap-O3 build-config will reproduce it as well. $ ~/src/gcc-trunk/configure --enable-bootstrap --prefix=/home/matt --enable-clocale=gnu --with-system-zlib --with-demangler-in-ld --enable-lto --with-fpmath=sse --enable-languages=c,c++,lto --with-build-config=bootstrap-lto --enable-build-with-cxx --disable-libmudflap --with-cpu=core2 --with-tune=core2 --disable-libssp $ make -j7 profiledbootstrap /home/matt/src/gcc-trunk/gcc/cp/parser.c: In function ‘bool cp_parser_ctor_initializer_opt_and_function_body(cp_parser*)’: /home/matt/src/gcc-trunk/gcc/cp/parser.c:17533:43: error: ‘list’ may be used uninitialized in this function [-Werror=maybe-uninitialized]
next reply other threads:[~2011-12-14 0:57 UTC|newest] Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top 2011-12-14 0:58 matt at use dot net [this message] 2011-12-14 1:04 ` [Bug middle-end/51544] " pinskia at gcc dot gnu.org 2011-12-14 20:57 ` [Bug middle-end/51544] uninitialized variable false positive prevents bootstrap with -fipa-cp-clone matt at use dot net 2013-01-31 18:04 ` dcb314 at hotmail dot com 2013-02-12 19:22 ` mpolacek at gcc dot gnu.org 2013-03-09 20:08 ` dcb314 at hotmail dot com
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