gimple-ssa-strength-reduction.c (struct slsr_cand_d): Add first_interp field.

gimple-ssa-strength-reduction.c (struct slsr_cand_d): Add first_interp field.

2018-05-23  Bill Schmidt  <wschmidt@linux.ibm.com>

	* gimple-ssa-strength-reduction.c (struct slsr_cand_d): Add
	first_interp field.
	(alloc_cand_and_find_basis): Initialize first_interp field.
	(slsr_process_mul): Modify first_interp field.
	(slsr_process_add): Likewise.
	(slsr_process_cast): Modify first_interp field for each new
	interpretation.
	(slsr_process_copy): Likewise.
	(dump_candidate): Dump first_interp field.
	(replace_mult_candidate): Process all interpretations, not just
	subsequent ones.
	(replace_rhs_if_not_dup): Likewise.
	(replace_one_candidate): Likewise.

From-SVN: r260608