175 lines
5.3 KiB
C++
175 lines
5.3 KiB
C++
/* Exported function prototypes from the Renesas RX backend.
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Copyright (C) 2008-2021 Free Software Foundation, Inc.
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Contributed by Red Hat.
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This file is part of GCC.
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GCC is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3, or (at your option)
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any later version.
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GCC is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GCC; see the file COPYING3. If not see
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<http://www.gnu.org/licenses/>. */
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#ifndef GCC_RX_PROTOS_H
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#define GCC_RX_PROTOS_H
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extern bool rx_can_use_simple_return (void);
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extern void rx_expand_epilogue (bool);
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extern void rx_expand_prologue (void);
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extern int rx_initial_elimination_offset (int, int);
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bool is_interrupt_func (const_tree decl);
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bool is_fast_interrupt_func (const_tree decl);
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/* rx_atomic_sequence is used to emit the header and footer
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of an atomic sequence. It's supposed to be used in a scope.
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When constructed, it will emit the atomic sequence header insns.
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When destructred (goes out of scope), it will emit the
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corresponding atomic sequence footer insns. */
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class rx_atomic_sequence
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{
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public:
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rx_atomic_sequence (const_tree fun_decl);
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~rx_atomic_sequence (void);
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private:
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rx_atomic_sequence (void);
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rx_atomic_sequence (const rx_atomic_sequence&);
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rx_atomic_sequence& operator = (const rx_atomic_sequence&);
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rtx m_prev_psw_reg;
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};
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#ifdef RTX_CODE
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extern int rx_adjust_insn_length (rtx_insn *, int);
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extern align_flags rx_align_for_label (rtx_insn *, int);
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extern void rx_emit_stack_popm (rtx *, bool);
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extern void rx_emit_stack_pushm (rtx *);
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extern char * rx_gen_move_template (rtx *, bool);
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extern bool rx_is_legitimate_constant (machine_mode, rtx);
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extern bool rx_is_restricted_memory_address (rtx,
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machine_mode);
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extern bool rx_match_ccmode (rtx, machine_mode);
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extern rtx rx_maybe_pidify_operand (rtx, int);
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extern void rx_notice_update_cc (rtx, rtx);
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extern void rx_split_cbranch (machine_mode, enum rtx_code,
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rtx, rtx, rtx);
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extern machine_mode rx_select_cc_mode (enum rtx_code, rtx, rtx);
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extern bool rx_reg_dead_or_unused_after_insn (const rtx_insn* i, int regno);
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extern void rx_copy_reg_dead_or_unused_notes (rtx reg, const rtx_insn* src,
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rtx_insn* dst);
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extern bool rx_fuse_in_memory_bitop (rtx* operands, rtx_insn* curr_insn,
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rtx (*gen_insn)(rtx, rtx));
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/* Result value of rx_find_set_of_reg. */
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struct set_of_reg
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{
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/* The insn where sh_find_set_of_reg stopped looking.
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Can be NULL_RTX if the end of the insn list was reached. */
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rtx_insn* insn;
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/* The set rtx of the specified reg if found, NULL_RTX otherwise. */
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const_rtx set_rtx;
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/* The set source rtx of the specified reg if found, NULL_RTX otherwise.
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Usually, this is the most interesting return value. */
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rtx set_src;
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};
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/* FIXME: Copy-pasta from SH. Move to rtl.h.
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Given a reg rtx and a start insn, try to find the insn that sets
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the specified reg by using the specified insn stepping function,
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such as 'prev_nonnote_nondebug_insn_bb'. When the insn is found,
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try to extract the rtx of the reg set. */
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template <typename F> inline set_of_reg
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rx_find_set_of_reg (rtx reg, rtx_insn* insn, F stepfunc,
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bool ignore_reg_reg_copies = false)
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{
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set_of_reg result;
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result.insn = insn;
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result.set_rtx = NULL_RTX;
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result.set_src = NULL_RTX;
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if (!REG_P (reg) || insn == NULL_RTX)
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return result;
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for (rtx_insn* i = stepfunc (insn); i != NULL_RTX; i = stepfunc (i))
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{
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if (BARRIER_P (i))
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break;
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if (!INSN_P (i) || DEBUG_INSN_P (i))
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continue;
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if (reg_set_p (reg, i))
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{
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if (CALL_P (i))
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break;
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result.insn = i;
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result.set_rtx = set_of (reg, i);
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if (result.set_rtx == NULL_RTX || GET_CODE (result.set_rtx) != SET)
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break;
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result.set_src = XEXP (result.set_rtx, 1);
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if (ignore_reg_reg_copies && REG_P (result.set_src))
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{
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reg = result.set_src;
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continue;
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}
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if (ignore_reg_reg_copies && SUBREG_P (result.set_src)
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&& REG_P (SUBREG_REG (result.set_src)))
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{
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reg = SUBREG_REG (result.set_src);
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continue;
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}
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break;
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}
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}
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/* If the searched reg is found inside a (mem (post_inc:SI (reg))), set_of
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will return NULL and set_rtx will be NULL.
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In this case report a 'not found'. result.insn will always be non-null
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at this point, so no need to check it. */
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if (result.set_src != NULL && result.set_rtx == NULL)
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result.set_src = NULL;
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return result;
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}
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/* FIXME: Move to rtlh.h. */
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template <typename F> inline rtx_insn*
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rx_find_use_of_reg (rtx reg, rtx_insn* insn, F stepfunc)
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{
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if (!REG_P (reg) || insn == NULL_RTX)
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return NULL;
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for (rtx_insn* i = stepfunc (insn); i != NULL_RTX; i = stepfunc (i))
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{
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if (BARRIER_P (i))
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break;
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if (!INSN_P (i) || DEBUG_INSN_P (i))
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continue;
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if (reg_overlap_mentioned_p (reg, PATTERN (i))
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|| (CALL_P (i) && find_reg_fusage (i, USE, reg)))
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return i;
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}
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return NULL;
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}
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#endif
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#endif /* GCC_RX_PROTOS_H */
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