re PR middle-end/82479 (missing popcount builtin detection)

re PR middle-end/82479 (missing popcount builtin detection)

gcc/ChangeLog:

2018-06-16  Kugan Vivekanandarajah  <kuganv@linaro.org>

	PR middle-end/82479
	* ipa-fnsummary.c (will_be_nonconstant_expr_predicate): Handle CALL_EXPR.
	* tree-scalar-evolution.c (interpret_expr): Likewise.
	(expression_expensive_p): Likewise.
	* tree-ssa-loop-ivopts.c (contains_abnormal_ssa_name_p): Likewise.
	* tree-ssa-loop-niter.c (number_of_iterations_popcount): New.
	(number_of_iterations_exit_assumptions): Use number_of_iterations_popcount.
	(ssa_defined_by_minus_one_stmt_p): New.

gcc/testsuite/ChangeLog:

2018-06-16  Kugan Vivekanandarajah  <kuganv@linaro.org>

	PR middle-end/82479
	* gcc.dg/tree-ssa/popcount.c: New test.
	* gcc.dg/tree-ssa/popcount2.c: New test.

From-SVN: r261682