Imported Upstream version 8.4~betaupstream/8.4_beta

1 files changed, 30 insertions, 0 deletions

diff --git a/test-suite/complexity/guard.v b/test-suite/complexity/guard.v
new file mode 100644
index 00000000..ceb7835a
--- /dev/null
+++ b/test-suite/complexity/guard.v
@@ -0,0 +1,30 @@
+(* Examples to check that the guard condition does not evaluate
+   irrelevant subterms *)
+(* Expected time < 1.00s *)
+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.
+
+Fixpoint slow2 n :=
+ match n with
+ | 0 => 0
+ | S k => slow2 k + slow2 k
+ end.
+
+Timeout 5 Time Fixpoint F' n :=
+  match n with
+  | 0 => 0
+  | S k =>
+    if slow2 100 then F' k else 0
+  end.