re PR tree-optimization/83648 (missing -Wsuggest-attribute=malloc on a trivial malloc-like function)

2018-05-15  Prathamesh Kulkarni  <prathamesh.kulkarni@linaro.org>

	PR tree-optimization/83648
	* ipa-pure-const.c (malloc_candidate_p): Allow function with NULL
	return value as malloc candidate.

testsuite/
	* gcc.dg/tree-ssa/pr83648.c: New test.
	* gcc.dg/tree-ssa/pr83648-2.c: Likewise.

From-SVN: r260250