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* tree-ssa-loop-ivopts.c (find_bivs, find_givs_in_stmt_scev): Apply expand_simple_operations to bases of the ivs. (tree_int_cst_sign_bit): Export. * tree-flow.h (expand_simple_operations): Declare. * tree-ssa-loop-niter.c (number_of_iterations_cond): Use tree_int_cst_sign_bit. (expand_simple_operations): Export. * tree.h (tree_int_cst_sign_bit): Declare. From-SVN: r99853
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