[llvm-commits] CVS: llvm/lib/VMCore/Constants.cpp

[Reid Spencer]

Changes in directory llvm/lib/VMCore:

Constants.cpp updated: 1.112 -> 1.113
---
Log message:

For PR409: http://llvm.cs.uiuc.edu/PR409 : \
Test the range of float constants to ensure we are not attempting to create a \
float constant using a double value that is out of range for a float

---
Diffs of the changes:  (+11 -0)

Index: llvm/lib/VMCore/Constants.cpp
diff -u llvm/lib/VMCore/Constants.cpp:1.112 llvm/lib/VMCore/Constants.cpp:1.113
--- llvm/lib/VMCore/Constants.cpp:1.112	Fri Nov 19 10:39:44 2004
+++ llvm/lib/VMCore/Constants.cpp	Mon Dec  6 16:18:37 2004
@@ -21,6 +21,7 @@
 #include "llvm/ADT/StringExtras.h"
 #include <algorithm>
 #include <iostream>
+#include <limits>
 using namespace llvm;
 
 ConstantBool *ConstantBool::True  = new ConstantBool(true);
@@ -442,6 +443,16 @@
 
     // TODO: Figure out how to test if a double can be cast to a float!
   case Type::FloatTyID:
+    return 
+      (std::numeric_limits<double>::has_infinity && 
+       std::numeric_limits<float>::has_infinity &&
+       Val == std::numeric_limits<double>::infinity()) ||
+      (std::numeric_limits<double>::has_quiet_NaN &&
+       std::numeric_limits<float>::has_quiet_NaN &&
+       Val == std::numeric_limits<double>::quiet_NaN()) ||
+      (Val >= -std::numeric_limits<float>::max() && 
+       Val <= std::numeric_limits<float>::max());
+    
   case Type::DoubleTyID:
     return true;          // This is the largest type...
   }