Fixed printing of infinity in generated code

Author: stephenchouca

include/taco/util/strings.h

@@ -7,6 +7,7 @@
 #include <map>
 #include <iomanip>
 #include <limits>
+#include <cmath>
 
 // To get the value of a compiler macro variable
 #define STRINGIFY(x) #x
@@ -30,6 +31,9 @@ toString(const T &val) {
 template <class T>
 typename std::enable_if<std::is_floating_point<T>::value, std::string>::type
 toString(const T &val) {
+  if (isinf(val)) {
+    return (val < 0) ? "-INFINITY" : "INFINITY";
+  }
   std::stringstream sstream;
   sstream << std::setprecision(std::numeric_limits<T>::max_digits10) << std::showpoint << val;
   return sstream.str();