[SH][committed] FIx PR 63986

[Oleg Endo]

Hi,

The attached patch fixes PR 63986.
Tested with
make -k check RUNTESTFLAGS="--target_board=sh-sim\{-m4/-ml,-m4/-mb}"
and no new failures.  Committed as r217968.

Cheers,
Oleg

gcc/ChangeLog:
	PR target/63986
	PR target/51244
	* config/sh/sh.c (sh_is_logical_t_store_expr,
	sh_try_omit_signzero_extend): Use rtx_insn* for insn argument.
	(sh_split_movrt_negc_to_movt_xor): New function.
	(sh_find_set_of_reg): Move to ...
	* config/sh/sh-protos.h (sh_find_set_of_reg): ... here and convert
	to template function.
	(set_of_reg): Use rtx_insn* for insn member.
	(sh_is_logical_t_store_expr, sh_try_omit_signzero_extend): Use
	rtx_insn* for insn argument.
	* config/sh/sh.md (movrt_negc, *movrt_negc): Split into movt-xor
	sequence using new sh_split_movrt_negc_to_movt_xor function.
	(movrt_xor): Allow also for SH2A.
	(*movt_movrt): Delete insns and splits.

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