From b90f66ba9d0f2ae2ab7a2ac56e3113d6caa2faad Mon Sep 17 00:00:00 2001
From: Bob Wilson <bob.wilson@apple.com>
Date: Wed, 12 Nov 2014 23:01:24 +0000
Subject: PR21518: Use unsigned arithmetic for trapping add/sub functions.

The code in {add,sub}v.i3 routines does not trap when it should, because
it performs the actual add/subtract operation in signed arithmetic,
rather than unsigned.

Patch by Francois-Xavie Coudert!

git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@221826 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/builtins/addvti3.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'lib/builtins/addvti3.c')

diff --git a/lib/builtins/addvti3.c b/lib/builtins/addvti3.c
index 79b9611f9..c224de60a 100644
--- a/lib/builtins/addvti3.c
+++ b/lib/builtins/addvti3.c
@@ -23,7 +23,7 @@
 COMPILER_RT_ABI ti_int
 __addvti3(ti_int a, ti_int b)
 {
-    ti_int s = a + b;
+    ti_int s = (tu_int) a + (tu_int) b;
     if (b >= 0)
     {
         if (s < a)
-- 
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