summaryrefslogtreecommitdiff
path: root/revision.c
diff options
context:
space:
mode:
Diffstat (limited to 'revision.c')
-rw-r--r--revision.c30
1 files changed, 27 insertions, 3 deletions
diff --git a/revision.c b/revision.c
index ef60205412..78397d6486 100644
--- a/revision.c
+++ b/revision.c
@@ -1970,6 +1970,22 @@ static struct merge_simplify_state *locate_simplify_state(struct rev_info *revs,
return st;
}
+static void remove_treesame_parents(struct commit *commit)
+{
+ struct commit_list **pp, *p;
+
+ pp = &commit->parents;
+ while ((p = *pp) != NULL) {
+ struct commit *parent = p->item;
+ if (parent->object.flags & TREESAME) {
+ *pp = p->next;
+ free(p);
+ continue;
+ }
+ pp = &p->next;
+ }
+}
+
static struct commit_list **simplify_one(struct rev_info *revs, struct commit *commit, struct commit_list **tail)
{
struct commit_list *p;
@@ -2022,10 +2038,18 @@ static struct commit_list **simplify_one(struct rev_info *revs, struct commit *c
if (revs->first_parent_only)
break;
}
- if (!revs->first_parent_only)
- cnt = remove_duplicate_parents(commit);
- else
+
+ if (revs->first_parent_only) {
cnt = 1;
+ } else {
+ /*
+ * A merge with a tree-same parent is useless
+ */
+ if (commit->parents && commit->parents->next)
+ remove_treesame_parents(commit);
+
+ cnt = remove_duplicate_parents(commit);
+ }
/*
* It is possible that we are a merge and one side branch