re PR tree-optimization/49960 (inconsistent outputs when enabling autopar for a self -dependence testcase)

	PR tree-optimization/49960

	* tree-data-ref.c (initialize_data_dependence_relation): Add initializations. 
	Remove call to compute_self_dependence.
	(compute_affine_dependence): Remove the !DDR_SELF_REFERENCE condition.
	(compute_self_dependence): Remove old code. Add call to compute_affine_dependence.
	(compute_all_dependences): Remove call to compute_self_dependence. 
	Add call to compute_affine_dependence.

From-SVN: r181411