Regain the ability to recognize loops calculating polynomial modulo
operation. This ability has been lost due to some changes in the
preceding optimizations. Add code to preprocess the IR to a form
that the pattern matching code can recognize.
llvm-svn: 298282
Technically, this is actually changes the expression and the original
assert was "wrong", but since the conjunction is with true, it doesn't
matter in this case.
llvm-svn: 293709
Vitaly Buka