Zhou Sheng fbf61eaba7 As Chris and Reid suggested, remove "isSigned" field from APInt, instead, ...

add some signed/unsigned arithmetic operation functions into APInt.h to
handle the signed/unsigned issue. These functions will be defined inside a
namespace "APIntOps" which is inside llvm namespace.

llvm-svn: 34053

2007-02-08 14:35:19 +00:00

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