Re: stage2 build failure

Ulrich Drepper via Gcc <[email protected]> writes:

> For two weeks bootstrapping gcc does not work anymore for me since -Werror
> is used.  The problem appears in stage 2, the previous stage works.  This
> is on Fedora 44 with gcc 16.1.1:
>
> /home/drepper/gnu/gcc/gcc/tree-vect-stmts.cc: In function ‘bool
> vectorizable_load(vec_info*, stmt_vec_info, gimple_stmt_iterator*,
> slp_tree, stmt_vector_for_cost*)’:
> /home/drepper/gnu/gcc/gcc/tree-vect-stmts.cc:10408:47: error: ‘stride_step’
> may be used uninitialized [-Werror=maybe-uninitialized]
> 10408 |                         = gimple_build_assign (newoff,
> POINTER_PLUS_EXPR,
>       |
> ~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~
> 10409 |                                                running_off,
> stride_step);
>       |
>  ~~~~~~~~~~~~~~~~~~~~~~~~~
> /home/drepper/gnu/gcc/gcc/tree-vect-stmts.cc:10156:25: note: ‘stride_step’
> was declared here
> 10156 |       tree stride_base, stride_step, alias_off;
>       |                         ^~~~~~~~~~~
>
>
> This seems legit.  Since this is the trunk version I have filed a bug.
> Should I?

It's https://gcc.gnu.org/PR125318. --disable-werror is a workaround or
using --enable-checking=yes (or not passing --enable-checking=release,
as the default on trunk is yes,extra).

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