1 files changed, 13 insertions, 1 deletions
diff --git a/lib/Support/APInt.cpp b/lib/Support/APInt.cpp
index 671fc4e7c3..88f32810d6 100644
--- a/lib/Support/APInt.cpp
+++ b/lib/Support/APInt.cpp
@@ -14,6 +14,7 @@
 
 #define DEBUG_TYPE "apint"
 #include "llvm/ADT/APInt.h"
+#include "llvm/ADT/FoldingSet.h"
 #include "llvm/Support/Debug.h"
 #include "llvm/Support/MathExtras.h"
 #include <math.h>
@@ -24,7 +25,6 @@
 
 using namespace llvm;
 
-
 /// This enumeration just provides for internal constants used in this
 /// translation unit. 
 enum {
@@ -165,6 +165,18 @@ APInt& APInt::operator=(uint64_t RHS) {
   return clearUnusedBits();
 }
 
+/// Profile - This method 'profiles' an APInt for use with FoldingSet.
+void APInt::Profile(FoldingSetNodeID& ID) const {
+  if (isSingleWord()) {
+    ID.AddInteger(VAL);
+    return;
+  }
+
+  uint32_t NumWords = getNumWords();
+  for (unsigned i = 0; i < NumWords; ++i)
+    ID.AddInteger(pVal[i]);
+}
+
 /// add_1 - This function adds a single "digit" integer, y, to the multiple 
 /// "digit" integer array,  x[]. x[] is modified to reflect the addition and
 /// 1 is returned if there is a carry out, otherwise 0 is returned.