perf annotate: Split branch stack cycles information out of 'struct annotation_line'

The cycles info is used only when branch stack is provided.  Separate
them from 'struct annotation_line' into a separate struct and lazy
allocate them to save some memory.

Committer notes:

Make annotation__compute_ipc() check if the lazy allocation works,
bailing out if so, its callers already do error checking and
propagation.

Signed-off-by: Namhyung Kim <[email protected]>
Cc: Adrian Hunter <[email protected]>
Cc: Christophe JAILLET <[email protected]>
Cc: Ian Rogers <[email protected]>
Cc: Ingo Molnar <[email protected]>
Cc: Jiri Olsa <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>

1 files changed, 1 insertions, 1 deletions

diff --git a/tools/perf/ui/browsers/annotate.c b/tools/perf/ui/browsers/annotate.c
index ccdb2cd11fbf..d2470f87344d 100644
--- a/tools/perf/ui/browsers/annotate.c
+++ b/tools/perf/ui/browsers/annotate.c
@@ -337,7 +337,7 @@ static void annotate_browser__calc_percent(struct annotate_browser *browser,
 				max_percent = percent;
 		}
 
-		if (max_percent < 0.01 && pos->al.ipc == 0) {
+		if (max_percent < 0.01 && (!pos->al.cycles || pos->al.cycles->ipc == 0)) {
 			RB_CLEAR_NODE(&pos->al.rb_node);
 			continue;
 		}