Index: lib/Support/IsNAN.cpp
===================================================================
RCS file: /var/cvs/llvm/llvm/lib/Support/IsNAN.cpp,v
retrieving revision 1.2
diff -u -r1.2 IsNAN.cpp
--- lib/Support/IsNAN.cpp	1 Sep 2004 22:55:35 -0000	1.2
+++ lib/Support/IsNAN.cpp	19 Oct 2004 10:11:39 -0000
@@ -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
Index: lib/Support/IsInf.cpp
===================================================================
RCS file: /var/cvs/llvm/llvm/lib/Support/IsInf.cpp,v
retrieving revision 1.3
diff -u -r1.3 IsInf.cpp
--- lib/Support/IsInf.cpp	1 Sep 2004 22:55:35 -0000	1.3
+++ lib/Support/IsInf.cpp	19 Oct 2004 10:11:39 -0000
@@ -24,6 +24,9 @@
 // apparently this has been a problem with Solaris for years.
 # include <ieeefp.h>
 static int isinf(double x) { return !finite(x) && x==x; }
+#elif defined(_MSC_VER)
+#include <float.h>
+#define isinf !_finite
 #else
 # error "Don't know how to get isinf()"
 #endif