https://gcc.gnu.org/bugzilla/show_bug.cgi?id=117263
Bug ID: 117263
Summary: genautomata.cc does not compile with -DNDEBUG due to
unused but set variable
Product: gcc
Version: 15.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: other
Assignee: unassigned at gcc dot gnu.org
Reporter: dario.gjorgjevski at gmail dot com
Target Milestone: ---
GCC commit c33d8c55a
When building with -DNDEBUG, genautomata.cc fails to compile due to unused but
set varaible ('states_num' on line 9090).
The following patch should fix the issue:
diff --git a/gcc/genautomata.cc b/gcc/genautomata.cc
index ec1e5331a..558f5ef27 100644
--- a/gcc/genautomata.cc
+++ b/gcc/genautomata.cc
@@ -9087,8 +9087,8 @@ static void
output_statistics (FILE *f)
{
automaton_t automaton;
- int states_num;
#ifndef NDEBUG
+ int states_num;
int transition_comb_vect_els = 0;
int transition_full_vect_els = 0;
int min_issue_delay_vect_els = 0;
@@ -9105,13 +9105,17 @@ output_statistics (FILE *f)
automaton->NDFA_states_num, automaton->NDFA_arcs_num);
fprintf (f, " %5d DFA states, %5d DFA arcs\n",
automaton->DFA_states_num, automaton->DFA_arcs_num);
+#ifndef NDEBUG
states_num = automaton->DFA_states_num;
+#endif
if (!no_minimization_flag)
{
fprintf (f, " %5d minimal DFA states, %5d minimal DFA arcs\n",
automaton->minimal_DFA_states_num,
automaton->minimal_DFA_arcs_num);
+#ifndef NDEBUG
states_num = automaton->minimal_DFA_states_num;
+#endif
}
fprintf (f, " %5d all insns %5d insn equivalence classes\n",
description->insns_num, automaton->insn_equiv_classes_num);
EOF
