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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.
110 lines
3.5 KiB
C
110 lines
3.5 KiB
C
/* tc-rx.h - header file for Renesas RX
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Copyright (C) 2008-2019 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_RX
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extern int target_big_endian;
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#define LISTING_HEADER (target_big_endian ? "RX GAS BE" : "RX GAS LE")
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#define LISTING_LHS_WIDTH 8
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#define LISTING_WORD_SIZE 1
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#define TARGET_ARCH bfd_arch_rx
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/* Instruction bytes are big endian, data bytes can be either. */
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#define TARGET_BYTES_BIG_ENDIAN 0
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#ifndef TE_LINUX
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#define TARGET_FORMAT (target_big_endian ? "elf32-rx-be" : "elf32-rx-le")
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#else
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#define TARGET_FORMAT "elf32-rx-linux"
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#endif
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/* We don't need to handle .word strangely. */
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#define WORKING_DOT_WORD
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/* Permit temporary numeric labels. */
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#define LOCAL_LABELS_FB 1
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/* But make sure that the binutils treat them as locals. */
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#define LOCAL_LABEL_PREFIX '.'
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/* Allow classic-style constants. */
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#define NUMBERS_WITH_SUFFIX 1
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/* .-foo gets turned into PC relative relocs. */
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#define DIFF_EXPR_OK
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#define md_end rx_md_end
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extern void rx_md_end (void);
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#define md_relax_frag rx_relax_frag
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extern int rx_relax_frag (segT, fragS *, long);
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#define TC_FRAG_TYPE struct rx_bytesT *
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#define TC_FRAG_INIT(fragp, max_bytes) rx_frag_init (fragp)
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extern void rx_frag_init (fragS *);
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/* Call md_pcrel_from_section(), not md_pcrel_from(). */
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#define MD_PCREL_FROM_SECTION(FIXP, SEC) md_pcrel_from_section (FIXP, SEC)
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extern long md_pcrel_from_section (struct fix *, segT);
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/* RX doesn't have a 32 bit PCREL relocations. */
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#define TC_FORCE_RELOCATION_SUB_LOCAL(FIX, SEG) 1
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#define TC_VALIDATE_FIX_SUB(FIX, SEG) \
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rx_validate_fix_sub (FIX)
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extern int rx_validate_fix_sub (struct fix *);
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#define TC_CONS_FIX_NEW(FRAG, WHERE, NBYTES, EXP, RELOC) \
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rx_cons_fix_new (FRAG, WHERE, NBYTES, EXP, RELOC)
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extern void rx_cons_fix_new (fragS *, int, int, expressionS *,
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bfd_reloc_code_real_type);
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#define tc_fix_adjustable(x) 0
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#define md_do_align(n, fill, len, max, around) \
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if ((n) \
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&& !need_pass_2 \
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&& (!(fill) \
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|| ((char)*(fill) == (char)0x03 && (len) == 1)) \
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&& subseg_text_p (now_seg)) \
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{ \
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frag_align_code ((n), (max)); \
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goto around; \
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}
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#define MAX_MEM_FOR_RS_ALIGN_CODE 8
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#define HANDLE_ALIGN(FRAG) rx_handle_align (FRAG)
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extern void rx_handle_align (fragS *);
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#define RELOC_EXPANSION_POSSIBLE 1
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#define MAX_RELOC_EXPANSION 4
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#define elf_tc_final_processing rx_elf_final_processing
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extern void rx_elf_final_processing (void);
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extern bfd_boolean rx_use_conventional_section_names;
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#define TEXT_SECTION_NAME (rx_use_conventional_section_names ? ".text" : "P")
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#define DATA_SECTION_NAME (rx_use_conventional_section_names ? ".data" : "D_1")
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#define BSS_SECTION_NAME (rx_use_conventional_section_names ? ".bss" : "B_1")
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#define md_start_line_hook rx_start_line
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extern void rx_start_line (void);
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