https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79345
--- Comment #12 from Richard Biener <rguenth at gcc dot gnu.org> --- Created attachment 40858 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=40858&action=edit unreduced testcase for false positive Bootstrap issue #2 (posted questionable workaround, not analyzed properly): > ./cc1plus -quiet -O2 -Wuninitialized -o /dev/null ~/ipa-cp.ii In file included from /space/rguenther/src/svn/trunk/gcc/coretypes.h:365:0, from /space/rguenther/src/svn/trunk/gcc/ipa-cp.c:105: /space/rguenther/src/svn/trunk/gcc/wide-int.h: In function ‘unsigned int ipcp_driver()’: /space/rguenther/src/svn/trunk/gcc/wide-int.h:881:3: warning: ‘*((void*)&<anonymous> +8)’ may be used uninitialized in this function [-Wmaybe-uninitialized] storage::operator = (x); ^~~~~~~ /space/rguenther/src/svn/trunk/gcc/wide-int.h:881:3: warning: ‘*((void*)&<anonymous> +16)’ may be used uninitialized in this function [-Wmaybe-uninitialized]