https://gcc.gnu.org/bugzilla/show_bug.cgi?id=116214
Bug ID: 116214
Summary: -Wmaybe-uninitialized in tree-vect-stmts.cc
Product: gcc
Version: 15.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: sjames at gcc dot gnu.org
Target Milestone: ---
Created attachment 58812
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=58812&action=edit
tree-vect-stmts.ii.xz
```
$ gcc -c tree-vect-stmts.ii -O3 -fno-exceptions -Werror=maybe-uninitialized
/var/tmp/portage/sys-devel/gcc-15.0.9999/work/gcc-15.0.9999/gcc/tree-vect-stmts.cc:
In function ‘bool vect_truncate_gather_scatter_offset(stmt_vec_info,
loop_vec_info, bool, gather_scatter_info*)’:
/var/tmp/portage/sys-devel/gcc-15.0.9999/work/gcc-15.0.9999/gcc/tree-vect-stmts.cc:1712:47:
warning: narrowing conversion of ‘vect_get_scalar_dr_size(dr_info)’ from
‘unsigned int’ to ‘int’ [-Wnarrowing]
1712 | int scales[] = { 1, vect_get_scalar_dr_size (dr_info) };
| ~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~
/var/tmp/portage/sys-devel/gcc-15.0.9999/work/gcc-15.0.9999/gcc/tree-vect-stmts.cc:
In function ‘bool vectorizable_operation(vec_info*, stmt_vec_info,
gimple_stmt_iterator*, gimple**, slp_tree, stmt_vector_for_cost*)’:
/var/tmp/portage/sys-devel/gcc-15.0.9999/work/gcc-15.0.9999/gcc/tree-vect-stmts.cc:7095:66:
warning: narrowing conversion of ‘ncopies’ from ‘int’ to ‘unsigned int’
[-Wnarrowing]
7095 |
ncopies}))
|
^~~~~~~
/var/tmp/portage/sys-devel/gcc-15.0.9999/work/gcc-15.0.9999/gcc/tree-vect-stmts.cc:7105:66:
warning: narrowing conversion of ‘ncopies’ from ‘int’ to ‘unsigned int’
[-Wnarrowing]
7105 |
ncopies }))
|
^~~~~~~
/var/tmp/portage/sys-devel/gcc-15.0.9999/work/gcc-15.0.9999/gcc/tree-vect-stmts.cc:
In function ‘bool vectorizable_load(vec_info*, stmt_vec_info,
gimple_stmt_iterator*, gimple**, slp_tree, stmt_vector_for_cost*)’:
/var/tmp/portage/sys-devel/gcc-15.0.9999/work/gcc-15.0.9999/gcc/tree-vect-stmts.cc:10388:47:
error: ‘stride_step’ may be used uninitialized [-Werror=maybe-uninitialized]
10388 | = gimple_build_assign (newoff,
POINTER_PLUS_EXPR,
|
~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~
10389 | running_off,
stride_step);
|
~~~~~~~~~~~~~~~~~~~~~~~~~
/var/tmp/portage/sys-devel/gcc-15.0.9999/work/gcc-15.0.9999/gcc/tree-vect-stmts.cc:10207:25:
note: ‘stride_step’ was declared here
10207 | tree stride_base, stride_step, alias_off;
| ^~~~~~~~~~~
cc1plus: some warnings being treated as errors
```
