introduced lazy computation of size info in the guard condition

git-svn-id: svn+ssh://scm.gforge.inria.fr/svn/coq/trunk@12862 85f007b7-540e-0410-9357-904b9bb8a0f7

1 files changed, 17 insertions, 0 deletions

diff --git a/test-suite/complexity/guard.v b/test-suite/complexity/guard.v
new file mode 100644
index 000000000..f64ffc259
--- /dev/null
+++ b/test-suite/complexity/guard.v
@@ -0,0 +1,17 @@
+(* Examples to check that the guard condition does not unfold
+   irrelevant subterms *)
+(* Expected time < 1s *)
+Require Import Bool.
+
+Fixpoint slow n :=
+ match n with
+ | 0 => true
+ | S k => andb (slow k) (slow k)
+ end.
+
+Timeout 5 Time Fixpoint F n :=
+  match n with
+  | 0 => 0
+  | S k =>
+    if slow 100 then F k else 0
+  end.