Don't look for __builtin_ffs, we'll never see it from llvm-gcc and there's

not reason to include it for other front ends.

llvm-svn: 22070

Author: Reid Spencer

llvm/lib/Transforms/IPO/SimplifyLibCalls.cpp

@@ -1773,20 +1773,6 @@ struct FFSLLOptimization : public FFSOptimization
 
 } FFSLLOptimizer;
 
-/// This LibCallOptimization will simplify calls to the "__builtin_ffs" 
-/// function which is generated by the CFE (its GCC specific). 
-/// It simply uses FFSOptimization for which the transformation is
-/// identical.
-/// @brief Simplify the ffsl library function.
-struct BuiltinFFSOptimization : public FFSOptimization
-{
-public:
-  /// @brief Default Constructor
-  BuiltinFFSOptimization() : FFSOptimization("__builtin_ffs",
-      "Number of '__builtin_ffs' calls simplified") {}
-
-} BuiltinFFSOptimization;
-
 /// A function to compute the length of a null-terminated constant array of
 /// integers.  This function can't rely on the size of the constant array 
 /// because there could be a null terminator in the middle of the array.