#include "config.h"#include "system.h"#include "coretypes.h"#include "tm.h"#include "rtl.h"#include "rtlhooks-def.h"#include "expr.h"#include "recog.h"
Functions | |
| rtx | gen_lowpart_general () |
| rtx | reg_num_sign_bit_copies_general (const_rtx x, enum machine_mode mode, const_rtx known_x, enum machine_mode known_mode, unsigned int known_ret, unsigned int *result) |
| rtx | reg_nonzero_bits_general (const_rtx x, enum machine_mode mode, const_rtx known_x, enum machine_mode known_mode, unsigned HOST_WIDE_INT known_ret, unsigned HOST_WIDE_INT *nonzero) |
| bool | reg_truncated_to_mode_general (enum machine_mode mode, const_rtx x) |
| rtx | gen_lowpart_if_possible () |
Variables | |
| struct rtl_hooks | general_rtl_hooks = RTL_HOOKS_INITIALIZER |
| struct rtl_hooks | rtl_hooks = RTL_HOOKS_INITIALIZER |
Function Documentation
| rtx gen_lowpart_general | ( | ) |
Handle SUBREGs and hard REGs that were rejected by simplify_gen_subreg.
The only additional case we can do is MEM.
The following exposes the use of "x" to CSE.
Adjust the address so that the address-after-the-data
is unchanged.
| rtx gen_lowpart_if_possible | ( | ) |
Assuming that X is an rtx (e.g., MEM, REG or SUBREG) for a fixed-point number, return an rtx (MEM, SUBREG, or CONST_INT) that refers to the least-significant part of X. MODE specifies how big a part of X to return.
If the requested operation cannot be done, 0 is returned.
This is similar to gen_lowpart_general.
This is the only other case we handle.
Adjust the address so that the address-after-the-data is
unchanged.
References adjust_address_nv, GET_MODE, GET_MODE_SIZE, MAX, MEM_ADDR_SPACE, memory_address_addr_space_p(), MIN, and XEXP.
| rtx reg_nonzero_bits_general | ( | const_rtx | x, |
| enum machine_mode | mode, | ||
| const_rtx | known_x, | ||
| enum machine_mode | known_mode, | ||
| unsigned HOST_WIDE_INT | known_ret, | ||
| unsigned HOST_WIDE_INT * | nonzero | ||
| ) |
References NULL.
| rtx reg_num_sign_bit_copies_general | ( | const_rtx | x, |
| enum machine_mode | mode, | ||
| const_rtx | known_x, | ||
| enum machine_mode | known_mode, | ||
| unsigned int | known_ret, | ||
| unsigned int * | result | ||
| ) |
References NULL.
References gen_lowpart_common(), and MEM_P.
Variable Documentation
| struct rtl_hooks general_rtl_hooks = RTL_HOOKS_INITIALIZER |
Generic hooks for the RTL middle-end. Copyright (C) 2004-2013 Free Software Foundation, Inc.
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/. For speed, we will copy the RTX hooks struct member-by-member instead of doing indirect calls. For these reason, we initialize two struct rtl_hooks globals: rtl_hooks is the one that is used to actually call the hooks, while general_rtl_hooks is used to restore the hooks by passes that modify them.
| struct rtl_hooks rtl_hooks = RTL_HOOKS_INITIALIZER |
Each pass can provide its own.
