[gcc r15-7450] [PR middle-end/117263] Avoid unused-but-set warning in genautomata

[Jeff Law via Gcc-cvs]

https://gcc.gnu.org/g:b81bb3ed216213fdaba82addae9fc34619ad6ec7

commit r15-7450-gb81bb3ed216213fdaba82addae9fc34619ad6ec7
Author: Dario Gjorgjevski <dario.gjorgjev...@gmail.com>
Date:   Sun Feb 9 09:16:31 2025 -0700

    [PR middle-end/117263] Avoid unused-but-set warning in genautomata
    
    This is a trivial bug where a user wanted to define NDEBUG when building
    genautomata, presumably trying to debug its behavior.  This resulted in a
    unused-but-set warning which caused the build to fail.
    
    Dario included the trivial fixes in the PR which I put through the usual
    bootstrap & regression test as well as compiling genautomata with NDEBUG.
    
    Pushing to the trunk.
    
            PR middle-end/117263
    gcc/
            * genautomata.cc (output_statistics): Avoid set but unnused warnings
            when compiling with NDEBUG.

Diff:
---
 gcc/genautomata.cc | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/gcc/genautomata.cc b/gcc/genautomata.cc
index 69f856d141cd..4059a229f961 100644
--- a/gcc/genautomata.cc
+++ b/gcc/genautomata.cc
@@ -9088,8 +9088,8 @@ 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;
@@ -9106,13 +9106,17 @@ 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);