perf test: Replace arm callgraph fp test workload with leafloop

So that it can get rid of requirement of a compiler.
Reviewed-by: Leo Yan <leo.yan@linaro.org>
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Tested-by: James Clark <james.clark@arm.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Athira Jajeev <atrajeev@linux.vnet.ibm.com>
Cc: German Gomez <german.gomez@arm.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Zhengjun Xing <zhengjun.xing@linux.intel.com>
Link: https://lore.kernel.org/r/20221116233854.1596378-7-namhyung@kernel.orgSigned-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

tools/perf/tests/shell/test_arm_callgraph_fp.sh

@@ -4,44 +4,16 @@
 
 lscpu | grep -q "aarch64" || exit 2
 
-if ! [ -x "$(command -v cc)" ]; then
-	echo "failed: no compiler, install gcc"
-	exit 2
-fi
-
 PERF_DATA=$(mktemp /tmp/__perf_test.perf.data.XXXXX)
-TEST_PROGRAM_SOURCE=$(mktemp /tmp/test_program.XXXXX.c)
-TEST_PROGRAM=$(mktemp /tmp/test_program.XXXXX)
+TEST_PROGRAM="perf test -w leafloop"
 
 cleanup_files()
 {
 	rm -f $PERF_DATA
-	rm -f $TEST_PROGRAM_SOURCE
-	rm -f $TEST_PROGRAM
 }
 
 trap cleanup_files exit term int
 
-cat << EOF > $TEST_PROGRAM_SOURCE
-int a = 0;
-void leaf(void) {
-  for (;;)
-    a += a;
-}
-void parent(void) {
-  leaf();
-}
-int main(void) {
-  parent();
-  return 0;
-}
-EOF
-
-echo " + Compiling test program ($TEST_PROGRAM)..."
-
-CFLAGS="-g -O0 -fno-inline -fno-omit-frame-pointer"
-cc $CFLAGS $TEST_PROGRAM_SOURCE -o $TEST_PROGRAM || exit 1
-
 # Add a 1 second delay to skip samples that are not in the leaf() function
 perf record -o $PERF_DATA --call-graph fp -e cycles//u -D 1000 --user-callchains -- $TEST_PROGRAM 2> /dev/null &
 PID=$!
@@ -58,11 +30,11 @@ wait $PID
 # program
 # 	728 leaf
 # 	753 parent
-# 	76c main
+# 	76c leafloop
 # ...
 
 perf script -i $PERF_DATA -F comm,ip,sym | head -n4
 perf script -i $PERF_DATA -F comm,ip,sym | head -n4 | \
 	awk '{ if ($2 != "") sym[i++] = $2 } END { if (sym[0] != "leaf" ||
 						       sym[1] != "parent" ||
-						       sym[2] != "main") exit 1 }'
+						       sym[2] != "leafloop") exit 1 }'