lower-subreg.c: Use rtx_insn
gcc/
* lower-subreg.c (simple_move): Strengthen param "insn" from rtx
to rtx_insn *.
(resolve_reg_notes): Likewise.
(resolve_simple_move): Likewise for return type, param "insn", and
locals "insns", "minsn".
(resolve_clobber): Strengthen param "insn" from rtx to rtx_insn *.
(resolve_use): Likewise.
(resolve_debug): Likewise.
(find_decomposable_shift_zext): Likewise.
(resolve_shift_zext): Likewise for return type, param "insn", and
locals "insns", "in". Eliminate use of NULL_RTX in favor of NULL.
(decompose_multiword_subregs): Likewise for local "insn",
"orig_insn", "decomposed_shift", "end".
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@214346 138bc75d-0d04-0410-961f-82ee72b054a4