diff options
Diffstat (limited to 'gcc-4.2.1-5666.3/gcc/rtlhooks.c')
| -rw-r--r-- | gcc-4.2.1-5666.3/gcc/rtlhooks.c | 169 |
1 files changed, 0 insertions, 169 deletions
diff --git a/gcc-4.2.1-5666.3/gcc/rtlhooks.c b/gcc-4.2.1-5666.3/gcc/rtlhooks.c deleted file mode 100644 index ece7198f9..000000000 --- a/gcc-4.2.1-5666.3/gcc/rtlhooks.c +++ /dev/null @@ -1,169 +0,0 @@ -/* Generic hooks for the RTL middle-end. - Copyright (C) 2004, 2005 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 2, 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 COPYING. If not, write to the Free -Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA -02110-1301, USA. */ - -#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" - - -/* 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. */ - -const struct rtl_hooks general_rtl_hooks = RTL_HOOKS_INITIALIZER; -struct rtl_hooks rtl_hooks = RTL_HOOKS_INITIALIZER; - -rtx -gen_lowpart_general (enum machine_mode mode, rtx x) -{ - rtx result = gen_lowpart_common (mode, x); - - if (result) - return result; - /* If it's a REG, it must be a hard reg that's not valid in MODE. */ - else if (REG_P (x) - /* Or we could have a subreg of a floating point value. */ - || (GET_CODE (x) == SUBREG - && FLOAT_MODE_P (GET_MODE (SUBREG_REG (x))))) - { - result = gen_lowpart_common (mode, copy_to_reg (x)); - gcc_assert (result != 0); - return result; - } - else - { - int offset = 0; - - /* The only additional case we can do is MEM. */ - gcc_assert (MEM_P (x)); - - /* The following exposes the use of "x" to CSE. */ - if (GET_MODE_SIZE (GET_MODE (x)) <= UNITS_PER_WORD - && SCALAR_INT_MODE_P (GET_MODE (x)) - && TRULY_NOOP_TRUNCATION (GET_MODE_BITSIZE (mode), - GET_MODE_BITSIZE (GET_MODE (x))) - && ! no_new_pseudos) - return gen_lowpart_general (mode, force_reg (GET_MODE (x), x)); - - if (WORDS_BIG_ENDIAN) - offset = (MAX (GET_MODE_SIZE (GET_MODE (x)), UNITS_PER_WORD) - - MAX (GET_MODE_SIZE (mode), UNITS_PER_WORD)); - - if (BYTES_BIG_ENDIAN) - /* Adjust the address so that the address-after-the-data - is unchanged. */ - offset -= (MIN (UNITS_PER_WORD, GET_MODE_SIZE (mode)) - - MIN (UNITS_PER_WORD, GET_MODE_SIZE (GET_MODE (x)))); - - return adjust_address (x, mode, offset); - } -} - -/* Similar to gen_lowpart, but cannot emit any instruction via - copy_to_reg or force_reg. Mainly used in simplify-rtx.c. */ -rtx -gen_lowpart_no_emit_general (enum machine_mode mode, rtx x) -{ - rtx result = gen_lowpart_if_possible (mode, x); - if (result) - return result; - else - return x; -} - -rtx -reg_num_sign_bit_copies_general (rtx x ATTRIBUTE_UNUSED, - enum machine_mode mode ATTRIBUTE_UNUSED, - rtx known_x ATTRIBUTE_UNUSED, - enum machine_mode known_mode ATTRIBUTE_UNUSED, - unsigned int known_ret ATTRIBUTE_UNUSED, - unsigned int *result ATTRIBUTE_UNUSED) -{ - return NULL; -} - -rtx -reg_nonzero_bits_general (rtx x ATTRIBUTE_UNUSED, - enum machine_mode mode ATTRIBUTE_UNUSED, - rtx known_x ATTRIBUTE_UNUSED, - enum machine_mode known_mode ATTRIBUTE_UNUSED, - unsigned HOST_WIDE_INT known_ret ATTRIBUTE_UNUSED, - unsigned HOST_WIDE_INT *nonzero ATTRIBUTE_UNUSED) -{ - return NULL; -} - -bool -reg_truncated_to_mode_general (enum machine_mode mode ATTRIBUTE_UNUSED, - rtx x ATTRIBUTE_UNUSED) -{ - return false; -} - -/* 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. */ - -rtx -gen_lowpart_if_possible (enum machine_mode mode, rtx x) -{ - rtx result = gen_lowpart_common (mode, x); - - if (result) - return result; - else if (MEM_P (x)) - { - /* This is the only other case we handle. */ - int offset = 0; - rtx new; - - if (WORDS_BIG_ENDIAN) - offset = (MAX (GET_MODE_SIZE (GET_MODE (x)), UNITS_PER_WORD) - - MAX (GET_MODE_SIZE (mode), UNITS_PER_WORD)); - if (BYTES_BIG_ENDIAN) - /* Adjust the address so that the address-after-the-data is - unchanged. */ - offset -= (MIN (UNITS_PER_WORD, GET_MODE_SIZE (mode)) - - MIN (UNITS_PER_WORD, GET_MODE_SIZE (GET_MODE (x)))); - - new = adjust_address_nv (x, mode, offset); - if (! memory_address_p (mode, XEXP (new, 0))) - return 0; - - return new; - } - else if (mode != GET_MODE (x) && GET_MODE (x) != VOIDmode) - return gen_lowpart_SUBREG (mode, x); - else - return 0; -} - |