Merge branch 'ak/corrected-commit-date'

The commit-graph learned to use corrected commit dates instead of
the generation number to help topological revision traversal.

* ak/corrected-commit-date:
  doc: add corrected commit date info
  commit-reach: use corrected commit dates in paint_down_to_common()
  commit-graph: use generation v2 only if entire chain does
  commit-graph: implement generation data chunk
  commit-graph: implement corrected commit date
  commit-graph: return 64-bit generation number
  commit-graph: add a slab to store topological levels
  t6600-test-reach: generalize *_three_modes
  commit-graph: consolidate fill_commit_graph_info
  revision: parse parent in indegree_walk_step()
  commit-graph: fix regression when computing Bloom filters

1 files changed, 8 insertions, 5 deletions

diff --git a/revision.c b/revision.c
index 3efd994160..b78733f508 100644
--- a/revision.c
+++ b/revision.c
@@ -3270,7 +3270,7 @@ define_commit_slab(indegree_slab, int);
 define_commit_slab(author_date_slab, timestamp_t);
 
 struct topo_walk_info {
-	uint32_t min_generation;
+	timestamp_t min_generation;
 	struct prio_queue explore_queue;
 	struct prio_queue indegree_queue;
 	struct prio_queue topo_queue;
@@ -3338,7 +3338,7 @@ static void explore_walk_step(struct rev_info *revs)
 }
 
 static void explore_to_depth(struct rev_info *revs,
-			     uint32_t gen_cutoff)
+			     timestamp_t gen_cutoff)
 {
 	struct topo_walk_info *info = revs->topo_walk_info;
 	struct commit *c;
@@ -3367,6 +3367,9 @@ static void indegree_walk_step(struct rev_info *revs)
 		struct commit *parent = p->item;
 		int *pi = indegree_slab_at(&info->indegree, parent);
 
+		if (repo_parse_commit_gently(revs->repo, parent, 1) < 0)
+			return;
+
 		if (*pi)
 			(*pi)++;
 		else
@@ -3380,7 +3383,7 @@ static void indegree_walk_step(struct rev_info *revs)
 }
 
 static void compute_indegrees_to_depth(struct rev_info *revs,
-				       uint32_t gen_cutoff)
+				       timestamp_t gen_cutoff)
 {
 	struct topo_walk_info *info = revs->topo_walk_info;
 	struct commit *c;
@@ -3438,7 +3441,7 @@ static void init_topo_walk(struct rev_info *revs)
 	info->min_generation = GENERATION_NUMBER_INFINITY;
 	for (list = revs->commits; list; list = list->next) {
 		struct commit *c = list->item;
-		uint32_t generation;
+		timestamp_t generation;
 
 		if (repo_parse_commit_gently(revs->repo, c, 1))
 			continue;
@@ -3506,7 +3509,7 @@ static void expand_topo_walk(struct rev_info *revs, struct commit *commit)
 	for (p = commit->parents; p; p = p->next) {
 		struct commit *parent = p->item;
 		int *pi;
-		uint32_t generation;
+		timestamp_t generation;
 
 		if (parent->object.flags & UNINTERESTING)
 			continue;