https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92002
--- Comment #16 from CVS Commits <cvs-commit at gcc dot gnu.org> --- The master branch has been updated by Rainer Orth <r...@gcc.gnu.org>: https://gcc.gnu.org/g:fa6092d2cdc654d4b2e018929c0dbe13fbd4ea69 commit r11-7484-gfa6092d2cdc654d4b2e018929c0dbe13fbd4ea69 Author: Rainer Orth <r...@cebitec.uni-bielefeld.de> Date: Wed Mar 3 16:01:50 2021 +0100 sparcv9: Disable -Wuninitialized warnings breaking bootstrap [PR92002] sparcv9 bootstrap has been broken for 1 1/2 years now by spurious -Wuninitialized warnings: In function âwide_int wi::max_value(unsigned int, signop)â, inlined from âwide_int wi::max_value(unsigned int, signop)â at /vol/gcc/src/hg/master/local/gcc/wide-int.cc:330:1: /vol/gcc/src/hg/master/local/gcc/wide-int.cc:335:31: error: â<anonymous>.generic_wide_int<wide_int_storage>::<anonymous>.wide_int_storage::val[1]â may be used uninitialized [-Werror=maybe-uninitialized] 335 | return shwi (-1, precision); | ^ [...] In function âwide_int get_nonzero_bits(const_tree)â, inlined from âwide_int get_nonzero_bits(const_tree)â at /vol/gcc/src/hg/master/local/gcc/tree-ssanames.c:531:1: /vol/gcc/src/hg/master/local/gcc/tree-ssanames.c:544:67: error: â<anonymous>.generic_wide_int<wide_int_storage>::<anonymous>.wide_int_storage::val[1]â may be used uninitialized [-Werror=maybe-uninitialized] 544 | | (HOST_WIDE_INT) pi->misalign, precision); | ^ [...] Before we ship yet another release with this issue, I suggest to at least include a workaround of demoting them to warnings. Tested on sparcv9-sun-solaris2.11. 2021-03-03 Rainer Orth <r...@cebitec.uni-bielefeld.de> gcc: PR bootstrap/92002 * config/sparc/t-sparc (tree-ssanames.o-warn): Don't error for -Wuninitialized, -Wmaybe-uninitialized. (wide-int.o-warn): Likewise.
