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/* Exported function prototypes from the Renesas RX backend.
Copyright (C) 2008-2018 Free Software Foundation, Inc.
Contributed by Red Hat.
This file is part of GCC.
GCC is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3, or (at your option)
any later version.
GCC is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with GCC; see the file COPYING3. If not see
<http://www.gnu.org/licenses/>. */
#ifndef GCC_RX_PROTOS_H
#define GCC_RX_PROTOS_H
extern bool rx_can_use_simple_return (void);
extern void rx_expand_epilogue (bool);
extern void rx_expand_prologue (void);
extern int rx_initial_elimination_offset (int, int);
bool is_interrupt_func (const_tree decl);
bool is_fast_interrupt_func (const_tree decl);
/* rx_atomic_sequence is used to emit the header and footer
of an atomic sequence. It's supposed to be used in a scope.
When constructed, it will emit the atomic sequence header insns.
When destructred (goes out of scope), it will emit the
corresponding atomic sequence footer insns. */
class rx_atomic_sequence
{
public:
rx_atomic_sequence (const_tree fun_decl);
~rx_atomic_sequence (void);
private:
rx_atomic_sequence (void);
rx_atomic_sequence (const rx_atomic_sequence&);
rx_atomic_sequence& operator = (const rx_atomic_sequence&);
rtx m_prev_psw_reg;
};
#ifdef RTX_CODE
extern int rx_adjust_insn_length (rtx_insn *, int);
extern align_flags rx_align_for_label (rtx_insn *, int);
extern void rx_emit_stack_popm (rtx *, bool);
extern void rx_emit_stack_pushm (rtx *);
extern char * rx_gen_move_template (rtx *, bool);
extern bool rx_is_legitimate_constant (machine_mode, rtx);
extern bool rx_is_restricted_memory_address (rtx,
machine_mode);
extern bool rx_match_ccmode (rtx, machine_mode);
extern rtx rx_maybe_pidify_operand (rtx, int);
extern void rx_notice_update_cc (rtx, rtx);
extern void rx_split_cbranch (machine_mode, enum rtx_code,
rtx, rtx, rtx);
extern machine_mode rx_select_cc_mode (enum rtx_code, rtx, rtx);
extern bool rx_reg_dead_or_unused_after_insn (const rtx_insn* i, int regno);
extern void rx_copy_reg_dead_or_unused_notes (rtx reg, const rtx_insn* src,
rtx_insn* dst);
extern bool rx_fuse_in_memory_bitop (rtx* operands, rtx_insn* curr_insn,
rtx (*gen_insn)(rtx, rtx));
/* Result value of rx_find_set_of_reg. */
struct set_of_reg
{
/* The insn where sh_find_set_of_reg stopped looking.
Can be NULL_RTX if the end of the insn list was reached. */
rtx_insn* insn;
/* The set rtx of the specified reg if found, NULL_RTX otherwise. */
const_rtx set_rtx;
/* The set source rtx of the specified reg if found, NULL_RTX otherwise.
Usually, this is the most interesting return value. */
rtx set_src;
};
/* FIXME: Copy-pasta from SH. Move to rtl.h.
Given a reg rtx and a start insn, try to find the insn that sets
the specified reg by using the specified insn stepping function,
such as 'prev_nonnote_nondebug_insn_bb'. When the insn is found,
try to extract the rtx of the reg set. */
template <typename F> inline set_of_reg
rx_find_set_of_reg (rtx reg, rtx_insn* insn, F stepfunc,
bool ignore_reg_reg_copies = false)
{
set_of_reg result;
result.insn = insn;
result.set_rtx = NULL_RTX;
result.set_src = NULL_RTX;
if (!REG_P (reg) || insn == NULL_RTX)
return result;
for (rtx_insn* i = stepfunc (insn); i != NULL_RTX; i = stepfunc (i))
{
if (BARRIER_P (i))
break;
if (!INSN_P (i) || DEBUG_INSN_P (i))
continue;
if (reg_set_p (reg, i))
{
if (CALL_P (i))
break;
result.insn = i;
result.set_rtx = set_of (reg, i);
if (result.set_rtx == NULL_RTX || GET_CODE (result.set_rtx) != SET)
break;
result.set_src = XEXP (result.set_rtx, 1);
if (ignore_reg_reg_copies && REG_P (result.set_src))
{
reg = result.set_src;
continue;
}
if (ignore_reg_reg_copies && SUBREG_P (result.set_src)
&& REG_P (SUBREG_REG (result.set_src)))
{
reg = SUBREG_REG (result.set_src);
continue;
}
break;
}
}
/* If the searched reg is found inside a (mem (post_inc:SI (reg))), set_of
will return NULL and set_rtx will be NULL.
In this case report a 'not found'. result.insn will always be non-null
at this point, so no need to check it. */
if (result.set_src != NULL && result.set_rtx == NULL)
result.set_src = NULL;
return result;
}
/* FIXME: Move to rtlh.h. */
template <typename F> inline rtx_insn*
rx_find_use_of_reg (rtx reg, rtx_insn* insn, F stepfunc)
{
if (!REG_P (reg) || insn == NULL_RTX)
return NULL;
for (rtx_insn* i = stepfunc (insn); i != NULL_RTX; i = stepfunc (i))
{
if (BARRIER_P (i))
break;
if (!INSN_P (i) || DEBUG_INSN_P (i))
continue;
if (reg_overlap_mentioned_p (reg, PATTERN (i))
|| (CALL_P (i) && find_reg_fusage (i, USE, reg)))
return i;
}
return NULL;
}
#endif
#endif /* GCC_RX_PROTOS_H */
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