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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.
79 lines
2.5 KiB
C
79 lines
2.5 KiB
C
/* tc-score.h -- Score specific file for assembler
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Copyright (C) 2006-2019 Free Software Foundation, Inc.
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Contributed by:
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Brain.lin (brain.lin@sunplusct.com)
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Mei Ligang (ligang@sunnorth.com.cn)
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Pei-Lin Tsai (pltsai@sunplus.com)
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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, Inc., 51 Franklin Street - Fifth Floor, Boston,
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MA 02110-1301, USA. */
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#ifndef TC_SCORE
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#define TC_SCORE
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#define TARGET_ARCH bfd_arch_score
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#define WORKING_DOT_WORD
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#define DIFF_EXPR_OK
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#define RELOC_EXPANSION_POSSIBLE
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#define MAX_RELOC_EXPANSION 2
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#define MAX_MEM_FOR_RS_ALIGN_CODE (3 + 4)
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#define md_undefined_symbol(name) NULL
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#define TARGET_FORMAT (target_big_endian ? "elf32-bigscore" : "elf32-littlescore")
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#define md_relax_frag(segment, fragp, stretch) score_relax_frag (segment, fragp, stretch)
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extern int score_relax_frag (asection *, struct frag *, long);
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/* #define md_frag_check(fragp) score_frag_check (fragp) */
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extern void score_frag_check (fragS *);
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#define TC_VALIDATE_FIX(FIXP, SEGTYPE, SKIP) score_validate_fix (FIXP)
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extern void score_validate_fix (struct fix *);
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#define TC_FORCE_RELOCATION(FIXP) score_force_relocation (FIXP)
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extern int score_force_relocation (struct fix *);
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#define tc_fix_adjustable(fixp) score_fix_adjustable (fixp)
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extern bfd_boolean score_fix_adjustable (struct fix *);
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#define elf_tc_final_processing score_elf_final_processing
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extern void score_elf_final_processing (void);
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struct score_tc_frag_data
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{
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unsigned int is_insn;
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struct fix *fixp;
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};
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#define TC_FRAG_TYPE struct score_tc_frag_data
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#define TC_FRAG_INIT(FRAGP, MAX_BYTES) \
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do \
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{ \
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(FRAGP)->tc_frag_data.is_insn = (((FRAGP)->fr_type == rs_machine_dependent) ? 1 : 0); \
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} \
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while (0)
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#ifdef OBJ_ELF
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#define GLOBAL_OFFSET_TABLE_NAME "_GLOBAL_OFFSET_TABLE_"
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#else
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#define GLOBAL_OFFSET_TABLE_NAME "__GLOBAL_OFFSET_TABLE_"
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#endif
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#endif /*TC_SCORE */
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