From 67b6e4e9399c9aaceceda7b6f501d25706f4dbd7 Mon Sep 17 00:00:00 2001
From: Chris Lattner <sabre@nondot.org>
Date: Mon, 25 Oct 2004 18:46:05 +0000
Subject: [PATCH] Patch to support MSVC, contributed by  Morten Ofstad

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@17219 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/Support/IsNAN.cpp | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/lib/Support/IsNAN.cpp b/lib/Support/IsNAN.cpp
index 75c813f41aa..f7bb4e3d8e3 100644
--- a/lib/Support/IsNAN.cpp
+++ b/lib/Support/IsNAN.cpp
@@ -19,6 +19,9 @@
 #elif HAVE_STD_ISNAN_IN_CMATH
 # include <cmath>
 using std::isnan;
+#elif defined(_MSC_VER)
+#include <float.h>
+#define isnan _isnan
 #else
 # error "Don't know how to get isnan()"
 #endif