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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.
104 lines
3.4 KiB
C
104 lines
3.4 KiB
C
/* tc-rl78.h - header file for Renesas RL78
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Copyright (C) 2011-2019 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_RL78
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extern int target_little_endian;
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#define LISTING_HEADER "RL78 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_rl78
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#define TARGET_BYTES_BIG_ENDIAN 0
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#define TARGET_FORMAT "elf32-rl78"
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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 rl78_md_end
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extern void rl78_md_end (void);
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#define md_relax_frag rl78_relax_frag
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extern int rl78_relax_frag (segT, fragS *, long);
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#define TC_FRAG_TYPE struct rl78_bytesT *
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#define TC_FRAG_INIT(fragp, max_bytes) rl78_frag_init (fragp)
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extern void rl78_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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/* RL78 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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rl78_validate_fix_sub (FIX)
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extern int rl78_validate_fix_sub (struct fix *);
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#define TC_CONS_FIX_NEW(FRAG, WHERE, NBYTES, EXP, RET) \
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rl78_cons_fix_new (FRAG, WHERE, NBYTES, EXP)
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extern void rl78_cons_fix_new (fragS *, int, int, expressionS *);
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#define tc_fix_adjustable(x) 0
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#define RELOC_EXPANSION_POSSIBLE 1
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#define MAX_RELOC_EXPANSION 8
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#define MAX_MEM_FOR_RS_ALIGN_CODE 8
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#define HANDLE_ALIGN(FRAG) rl78_handle_align (FRAG)
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extern void rl78_handle_align (fragS *);
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#define elf_tc_final_processing rl78_elf_final_processing
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extern void rl78_elf_final_processing (void);
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#define TC_PARSE_CONS_EXPRESSION(EXP, NBYTES) \
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((EXP)->X_md = 0, expression (EXP), TC_PARSE_CONS_RETURN_NONE)
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#define TC_LINKRELAX_FIXUP(seg) ((seg->flags & SEC_CODE) || (seg->flags & SEC_DEBUGGING))
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/* Do not adjust relocations involving symbols in code sections,
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because it breaks linker relaxations. This could be fixed in the
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linker, but this fix is simpler, and it pretty much only affects
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object size a little bit. */
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#define TC_FORCE_RELOCATION_SUB_SAME(FIX, SEC) \
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(GENERIC_FORCE_RELOCATION_SUB_SAME (FIX, SEC) \
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|| ((SEC)->flags & SEC_CODE) != 0 \
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|| ((SEC)->flags & SEC_DEBUGGING) != 0 \
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|| TC_FORCE_RELOCATION (FIX))
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#define DWARF2_USE_FIXED_ADVANCE_PC 1
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#define TC_FORCE_RELOCATION(FIX) (linkrelax)
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