perf bench: Avoid NDEBUG warning

With NDEBUG set the asserts are compiled out. This yields
"unused-but-set-variable" variables. Move these variables behind
NDEBUG to avoid the warning.

Signed-off-by: Ian Rogers <irogers@google.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Sean Christopherson <seanjc@google.com>
Link: https://lore.kernel.org/r/20230330183827.1412303-1-irogers@google.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

diff --git a/tools/perf/bench/find-bit-bench.c b/tools/perf/bench/find-bit-bench.c
index d103c3136983d55aad738fd8a078a76cd418cb60..7e25b0e413f6f599e6a7d6d30d64959c0dc17c93 100644 (file)
--- a/tools/perf/bench/find-bit-bench.c
+++ b/tools/perf/bench/find-bit-bench.c
@@ -61,7 +61,6 @@ static int do_for_each_set_bit(unsigned int num_bits)
        double time_average, time_stddev;
        unsigned int bit, i, j;
        unsigned int set_bits, skip;
-       unsigned int old;
 
        init_stats(&fb_time_stats);
        init_stats(&tb_time_stats);
@@ -73,7 +72,10 @@ static int do_for_each_set_bit(unsigned int num_bits)
                        __set_bit(i, to_test);
 
                for (i = 0; i < outer_iterations; i++) {
-                       old = accumulator;
+#ifndef NDEBUG
+                       unsigned int old = accumulator;
+#endif
+
                        gettimeofday(&start, NULL);
                        for (j = 0; j < inner_iterations; j++) {
                                for_each_set_bit(bit, to_test, num_bits)
@@ -85,7 +87,9 @@ static int do_for_each_set_bit(unsigned int num_bits)
                        runtime_us = diff.tv_sec * USEC_PER_SEC + diff.tv_usec;
                        update_stats(&fb_time_stats, runtime_us);
 
+#ifndef NDEBUG
                        old = accumulator;
+#endif
                        gettimeofday(&start, NULL);
                        for (j = 0; j < inner_iterations; j++) {
                                for (bit = 0; bit < num_bits; bit++) {