PR tree-optimization/60502
	* tree-ssa-reassoc.c (eliminate_not_pairs): Use build_all_ones_cst
	instead of build_low_bits_mask.

	* gcc.c-torture/compile/pr60502.c: New test.

Co-Authored-By: Marc Glisse <marc.glisse@inria.fr>

From-SVN: r208507