From 5258e13d0b5ed1fb201579115d618728ab0b69c0 Mon Sep 17 00:00:00 2001
From: Corey Richardson <corey@octayn.net>
Date: Thu, 27 Mar 2014 07:54:41 -0400
Subject: [PATCH] test/run-pass/out-of-stack: prevent tco

We really do *not* want TCO to kick in. If it does, we'll never blow the
stack, and never trigger the condition the test is checking for. To that end,
do a meaningless alloc that serves only to get a destructor to run. The
addition of nocapture/noalias seems to have let LLVM do more TCO, which
hurt this testcase.
---
 src/test/run-pass/out-of-stack.rs | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/test/run-pass/out-of-stack.rs b/src/test/run-pass/out-of-stack.rs
index 9344c29d5ca..d1daa1e365e 100644
--- a/src/test/run-pass/out-of-stack.rs
+++ b/src/test/run-pass/out-of-stack.rs
@@ -28,6 +28,7 @@ fn silent_recurse() {
 fn loud_recurse() {
     println!("hello!");
     loud_recurse();
+    black_box(()); // don't optimize this into a tail call. please.
 }
 
 fn main() {