regrename.c: Use rtx_insn
gcc/
* regrename.c (create_new_chain): Strengthen param "insn" from rtx
to rtx_insn *.
(init_rename_info): Replace use of NULL_RTX with NULL when dealing
with an insn.
(regrename_analyze): Strengthen local "insn" from rtx to
rtx_insn *.
(scan_rtx_reg): Likewise for param "insn".
(scan_rtx_address): Likewise.
(scan_rtx): Likewise.
(restore_operands): Likewise.
(record_out_operands): Likewise.
(build_def_use): Likewise for local "insn". Replace use of
NULL_RTX with NULL when dealing with an insn.
From-SVN: r214368