add option for literal formatting to APInt::toString()

toString() now takes an optional bool argument that,
depending on the radix, adds the appropriate prefix
to the integer's string representation that makes it into a
meaningful C literal, e.g.:

hexademical: '-f' becomes '-0xf'
octal: '77' becomes '077'
binary: '110' becomes '0b110'

Patch by nobled@dreamwidth.org!

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@133032 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 4 insertions, 3 deletions

diff --git a/include/llvm/ADT/APInt.h b/include/llvm/ADT/APInt.h
index 2feef076fa..e68e579cdf 100644
--- a/include/llvm/ADT/APInt.h
+++ b/include/llvm/ADT/APInt.h
@@ -1241,18 +1241,19 @@ public:
 
   /// toString - Converts an APInt to a string and append it to Str.  Str is
   /// commonly a SmallString.
-  void toString(SmallVectorImpl<char> &Str, unsigned Radix, bool Signed) const;
+  void toString(SmallVectorImpl<char> &Str, unsigned Radix, bool Signed,
+                bool formatAsCLiteral = false) const;
 
   /// Considers the APInt to be unsigned and converts it into a string in the
   /// radix given. The radix can be 2, 8, 10 or 16.
   void toStringUnsigned(SmallVectorImpl<char> &Str, unsigned Radix = 10) const {
-    toString(Str, Radix, false);
+    toString(Str, Radix, false, false);
   }
 
   /// Considers the APInt to be signed and converts it into a string in the
   /// radix given. The radix can be 2, 8, 10 or 16.
   void toStringSigned(SmallVectorImpl<char> &Str, unsigned Radix = 10) const {
-    toString(Str, Radix, true);
+    toString(Str, Radix, true, false);
   }
 
   /// toString - This returns the APInt as a std::string.  Note that this is an