http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51542
Bug #: 51542
Summary: bootstrap failure due to uninitialized variable use in
c-parser
Classification: Unclassified
Product: gcc
Version: 4.7.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
AssignedTo: [email protected]
ReportedBy: [email protected]
I checked by hand, and this looks real to me. It doesn't come up without
-O[3,fast] and LTO probably due to a lack of inlining that limits visibility of
the analysis.
NOTE: I have hand-modified my build/bootstrap-lto.mk to use -Ofast
$ ~/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/c-parser.c: In function ‘c_expr
c_parser_postfix_expression_after_primary(c_parser*, location_t, c_expr)’:
/home/matt/src/gcc-trunk/gcc/c-parser.c:6880:16: error: ‘origtypes’ may be used
uninitialized in this function [-Werror=maybe-uninitialized]
