diff --git a/mercurial/help/revsets.txt b/mercurial/help/revsets.txt
--- a/mercurial/help/revsets.txt
+++ b/mercurial/help/revsets.txt
@@ -122,6 +122,10 @@ The following predicates are supported:
 ``parents(set)``
   The set of all parents for all changesets in set.
 
+``present(set)``
+  An empty set, if any revision in set isn't found; otherwise,
+  all revisions in set.
+
 ``removes(pattern)``
   Changesets which remove files matching pattern.
 
diff --git a/mercurial/revset.py b/mercurial/revset.py
--- a/mercurial/revset.py
+++ b/mercurial/revset.py
@@ -378,6 +378,12 @@ def reverse(repo, subset, x):
     l.reverse()
     return l
 
+def present(repo, subset, x):
+    try:
+        return getset(repo, subset, x)
+    except error.RepoLookupError:
+        return []
+
 def sort(repo, subset, x):
     l = getargs(x, 1, 2, _("sort wants one or two arguments"))
     keys = "rev"
@@ -481,6 +487,7 @@ symbols = {
     "p1": p1,
     "p2": p2,
     "parents": parents,
+    "present": present,
     "removes": removes,
     "reverse": reverse,
     "roots": roots,