https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90974
Bug ID: 90974
Summary: A suspicious code in tree-vect-loop.c since r256576
Product: gcc
Version: 10.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: marxin at gcc dot gnu.org
Target Milestone: ---
The revision has the following hunk:
@@ -5118,15 +5208,15 @@ vect_create_epilog_for_reduction (vec<tree> vect_defs,
gimple *stmt,
dump_printf_loc (MSG_NOTE, vect_location,
"Reduce using vector shifts\n");
- vec_dest = vect_create_destination_var (scalar_dest, vectype);
- new_temp = new_phi_result;
+ mode1 = TYPE_MODE (vectype1);
+ vec_dest = vect_create_destination_var (scalar_dest, vectype1);
for (elt_offset = nelements / 2;
elt_offset >= 1;
elt_offset /= 2)
{
calc_vec_perm_mask_for_shift (elt_offset, nelements, &sel);
indices.new_vector (sel, 2, nelements);
Note that mode1 is a dead store. Are you Richi sure the removal of 'new_temp'
was intentional?
