ira: Use rtx_insn in various places
gcc/
* ira-int.h (struct ira_allocno_copy): Strengthen field "insn"
from rtx to rtx_insn *insn.
(ira_create_copy): Strengthen param "insn" from rtx to rtx_insn *.
(ira_add_allocno_copy): Likewise.
* ira-build.c (find_allocno_copy): Strengthen param "insn" from
rtx to rtx_insn *.
(ira_create_copy): Likewise.
(ira_add_allocno_copy): Likewise.
(create_bb_allocnos): Likewise for local "insn".
* ira-conflicts.c (process_regs_for_copy): Likewise for param "insn".
(process_reg_shuffles): Update NULL_RTX to NULL in invocation of
process_regs_for_copy for rtx_insn * param.
(add_insn_allocno_copies): Strengthen param "insn" from rtx to
rtx_insn *insn. Update NULL_RTX to NULL in invocation of
process_regs_for_copy for rtx_insn * param.
(add_copies): Strengthen local "insn" from rtx to rtx_insn *insn.
* ira-costs.c (record_reg_classes): Likewise for param "insn".
(record_operand_costs): Likewise.
(scan_one_insn): Likewise for return type, and for param "insn".
(process_bb_for_costs): Likewise for local "insn".
(process_bb_node_for_hard_reg_moves): Likewise.
* ira-emit.c (struct move): Likewise for field "insn".
(create_move): Eliminate use of NULL_RTX when dealing with an
rtx_insn *.
(emit_move_list): Strengthen return type and locals "result",
"insn" from rtx to rtx_insn *insn.
(emit_moves): Likewise for locals "insns", "tmp".
(ira_emit): Likewise for local "insn".
* ira-lives.c (mark_hard_reg_early_clobbers): Likewise for param
"insn".
(find_call_crossed_cheap_reg): Likewise.
(process_bb_node_lives): Likewise for local "insn".
* ira.c (decrease_live_ranges_number): Likewise.
(compute_regs_asm_clobbered): Likewise.
(build_insn_chain): Likewise.
(find_moveable_pseudos): Likewise, also locals "def_insn",
"use_insn", "x". Also strengthen local "closest_uses" from rtx *
to rtx_insn **. Add a checked cast when assigning from
"closest_use" into closest_uses array in a region where we know
it's a non-NULL insn.
(interesting_dest_for_shprep): Strengthen param "insn" from rtx
to rtx_insn *.
(split_live_ranges_for_shrink_wrap): Likewise for locals "insn",
"last_interesting_insn", "uin".
(move_unallocated_pseudos): Likewise for locals "def_insn",
"move_insn", "newinsn".
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@214339 138bc75d-0d04-0410-961f-82ee72b054a4