From df8f1c5c5a8dceb78a915069f4a0620a90f4e7e1 Mon Sep 17 00:00:00 2001
From: David Nadlinger <code@klickverbot.at>
Date: Mon, 3 Aug 2020 01:40:39 +0100
Subject: [PATCH] compiler: Annotate math functions nounwind/nowrite

---
 artiq/compiler/math_fns.py | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/artiq/compiler/math_fns.py b/artiq/compiler/math_fns.py
index 5ae80ea4d..3dfb0c580 100644
--- a/artiq/compiler/math_fns.py
+++ b/artiq/compiler/math_fns.py
@@ -34,6 +34,8 @@ def unary_fp_type(name):
     return types.TExternalFunction(OrderedDict([("arg", builtins.TFloat())]),
                                    builtins.TFloat(),
                                    name,
+                                   # errno isn't observable from ARTIQ Python.
+                                   flags={"nounwind", "nowrite"},
                                    broadcast_across_arrays=True)