From 461a67fa15370a9ec88f8f8a240bf7c123bb2029 Mon Sep 17 00:00:00 2001
From: Dimitry Andric <dim@FreeBSD.org>
Date: Mon, 18 Dec 2017 20:11:37 +0000
Subject: Vendor import of clang trunk r321017:
 https://llvm.org/svn/llvm-project/cfe/trunk@321017

---
 lib/StaticAnalyzer/Core/BasicValueFactory.cpp | 2 ++
 1 file changed, 2 insertions(+)

(limited to 'lib/StaticAnalyzer/Core/BasicValueFactory.cpp')

diff --git a/lib/StaticAnalyzer/Core/BasicValueFactory.cpp b/lib/StaticAnalyzer/Core/BasicValueFactory.cpp
index ebbace4e33b3..ec7a7e9e4b1c 100644
--- a/lib/StaticAnalyzer/Core/BasicValueFactory.cpp
+++ b/lib/StaticAnalyzer/Core/BasicValueFactory.cpp
@@ -225,6 +225,8 @@ BasicValueFactory::evalAPSInt(BinaryOperator::Opcode Op,
       // test these conditions symbolically.
 
       // FIXME: Expand these checks to include all undefined behavior.
+      if (V1.isSigned() && V1.isNegative())
+        return nullptr;
 
       if (V2.isSigned() && V2.isNegative())
         return nullptr;
-- 
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