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db22231044
ommit 3ae729d5a4
Author: H.J. Lu <hjl.tools@gmail.com>
Date: Wed Mar 7 04:18:45 2018 -0800
x86: Rewrite NOP generation for fill and alignment
increased MAX_MEM_FOR_RS_ALIGN_CODE to 4095 which resulted in increase
of assembler time and memory usage by 5 times for inputs with many
.p2align directives, which is typical for LTO output. This patch passes
max_bytes to TC_FRAG_INIT so that MAX_MEM_FOR_RS_ALIGN_CODE can be set
as needed and tracked by backend it so that HANDLE_ALIGN can check the
maximum alignment for each rs_align_code frag. Wall time to assemble
the same cc1plus.s:
before:
423.78user 0.89system 7:05.71elapsed 99%CPU
after:
102.35user 0.27system 1:42.89elapsed 99%CPU
PR gas/24165
* frags.c (frag_var_init): Pass max_chars to TC_FRAG_INIT as
max_bytes.
* config/tc-aarch64.h (TC_FRAG_INIT): Add and pass max_bytes to
aarch64_init_frag.
* /config/tc-arm.h (TC_FRAG_INIT): And and pass max_bytes to
arm_init_frag.
* config/tc-avr.h (TC_FRAG_INIT): And and ignore max_bytes.
* config/tc-ia64.h (TC_FRAG_INIT): Likewise.
* config/tc-mmix.h (TC_FRAG_INIT): Likewise.
* config/tc-nds32.h (TC_FRAG_INIT): Likewise.
* config/tc-ns32k.h (TC_FRAG_INIT): Likewise.
* config/tc-rl78.h (TC_FRAG_INIT): Likewise.
* config/tc-rx.h (TC_FRAG_INIT): Likewise.
* config/tc-score.h (TC_FRAG_INIT): Likewise.
* config/tc-tic54x.h (TC_FRAG_INIT): Likewise.
* config/tc-tic6x.h (TC_FRAG_INIT): Likewise.
* config/tc-xtensa.h (TC_FRAG_INIT): Likewise.
* config/tc-i386.h (MAX_MEM_FOR_RS_ALIGN_CODE): Set to
(alignment ? ((1 << alignment) - 1) : 1)
(i386_tc_frag_data): Add max_bytes.
(TC_FRAG_INIT): Add and track max_bytes.
(HANDLE_ALIGN): Replace MAX_MEM_FOR_RS_ALIGN_CODE with
fragP->tc_frag_data.max_bytes.
* doc/internals.texi: Update TC_FRAG_TYPE with max_bytes.
124 lines
3.3 KiB
C
124 lines
3.3 KiB
C
/* tc-ns32k.h -- Opcode table for National Semi 32k processor
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Copyright (C) 1987-2019 Free Software Foundation, Inc.
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This file is part of GAS, the GNU Assembler.
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GAS 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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GAS 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 GAS; see the file COPYING. If not, write to the Free
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Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA
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02110-1301, USA. */
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#define TC_NS32K
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#define TARGET_BYTES_BIG_ENDIAN 0
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#define TC_PCREL_ADJUST(F) md_pcrel_adjust(F)
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extern int md_pcrel_adjust (fragS *);
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#define NO_RELOC BFD_RELOC_NONE
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#define TARGET_ARCH bfd_arch_ns32k
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#ifndef TARGET_FORMAT /* Maybe defined in te-*.h. */
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#define TARGET_FORMAT "a.out-pc532-mach"
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#endif
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#define LOCAL_LABELS_FB 1
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#include "bit_fix.h"
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#ifdef SEQUENT_COMPATABILITY
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#define DEF_MODEC 20
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#define DEF_MODEL 21
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#endif
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#ifndef DEF_MODEC
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#define DEF_MODEC 20
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#endif
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#ifndef DEF_MODEL
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#define DEF_MODEL 20
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#endif
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#define MAX_ARGS 4
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#define ARG_LEN 50
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#define TC_CONS_FIX_NEW cons_fix_new_ns32k
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extern void cons_fix_new_ns32k (fragS *, int, int, expressionS *,
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bfd_reloc_code_real_type);
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/* The NS32x32 has a non 0 nop instruction which should be used in aligns. */
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#define NOP_OPCODE 0xa2
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#define md_operand(x)
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extern const struct relax_type md_relax_table[];
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#define TC_GENERIC_RELAX_TABLE md_relax_table
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#define TC_FRAG_TYPE \
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struct \
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{ \
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fragS * fr_opcode_fragP; \
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unsigned int fr_opcode_offset; \
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char fr_bsr; \
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}
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#define TC_FRAG_INIT(X, MAX_BYTES) \
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do \
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{ \
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frag_opcode_frag (X) = NULL; \
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frag_opcode_offset (X) = 0; \
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frag_bsr (X) = 0; \
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} \
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while (0)
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/* Accessor macros for things which may move around. */
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#define frag_opcode_frag(X) (X)->tc_frag_data.fr_opcode_fragP
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#define frag_opcode_offset(X) (X)->tc_frag_data.fr_opcode_offset
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#define frag_bsr(X) (X)->tc_frag_data.fr_bsr
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#define TC_FIX_TYPE \
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struct \
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{ \
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fragS * opcode_fragP; \
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unsigned int opcode_offset; \
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unsigned int bsr : 1; \
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}
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/* Accessor macros for things which may move around.
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See comments in write.h. */
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#define fix_im_disp(X) (X)->fx_im_disp
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#define fix_bit_fixP(X) (X)->fx_bit_fixP
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#define fix_opcode_frag(X) (X)->tc_fix_data.opcode_fragP
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#define fix_opcode_offset(X) (X)->tc_fix_data.opcode_offset
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#define fix_bsr(X) (X)->tc_fix_data.bsr
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#define TC_INIT_FIX_DATA(X) \
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do \
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{ \
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fix_opcode_frag(X) = NULL; \
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fix_opcode_offset(X) = 0; \
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fix_bsr(X) = 0; \
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} \
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while (0)
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#define TC_FIX_DATA_PRINT(FILE, FIX) \
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do \
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{ \
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fprintf ((FILE), "opcode_frag=%ld, operand offset=%d, bsr=%d\n", \
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(unsigned long) fix_opcode_frag (FIX), \
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fix_opcode_offset (FIX), \
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fix_bsr (FIX)); \
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} \
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while (0)
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