perf diff: Use internal rb tree for hists__precompute

There's missing change for hists__precompute to iterate either
entries_collapsed or entries_in tree. The change was initiated
for hists_compute_resort function in commit:

  66f97ed perf diff: Use internal rb tree for compute resort

but was missing for hists__precompute function changes.

Signed-off-by: Jiri Olsa <jolsa@redhat.com>
Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1355404152-16523-2-git-send-email-jolsa@redhat.com
[ committer note: Reduce patch size, no functional change ]
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

1 files changed, 10 insertions, 3 deletions

diff --git a/tools/perf/builtin-diff.c b/tools/perf/builtin-diff.c
index a9d63c1c64c5..da8f8eb383a0 100644
--- a/tools/perf/builtin-diff.c
+++ b/tools/perf/builtin-diff.c
@@ -323,13 +323,20 @@ static void hists__baseline_only(struct hists *hists)
 
 static void hists__precompute(struct hists *hists)
 {
-        struct rb_node *next = rb_first(&hists->entries);
+        struct rb_root *root;
+        struct rb_node *next;
+
+        if (sort__need_collapse)
+                root = &hists->entries_collapsed;
+        else
+                root = hists->entries_in;
 
+        next = rb_first(root);
         while (next != NULL) {
-                struct hist_entry *he = rb_entry(next, struct hist_entry, rb_node);
+                struct hist_entry *he = rb_entry(next, struct hist_entry, rb_node_in);
                 struct hist_entry *pair = hist_entry__next_pair(he);
 
-                next = rb_next(&he->rb_node);
+                next = rb_next(&he->rb_node_in);
                 if (!pair)
                         continue;