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c641fe0dcb
Before the change tc-m68k maintained a list of seen labels. Alignment check traversed label list to resolve symbol to label. This caused quadratic slowdown as each symbol was checked against each label. Worst affected files are the ones built with debugging enabled as DWARF generates many labels. The change embeds auxiliary label information right into symbol using TC_SYMFIELD_TYPE. Before the change test from PR 29058 did not finish in 10 minutes. After the change it finishes in 2 seconds. gas/ChangeLog: PR 29058 * config/tc-m68k.h (TC_SYMFIELD_TYPE): define as m68k_tc_sy. * config/tc-m68k.c (m68k_frob_label): Use TC_SYMFIELD_TYPE to store label information.
159 lines
4.8 KiB
C
159 lines
4.8 KiB
C
/* This file is tc-m68k.h
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Copyright (C) 1987-2022 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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#ifndef TC_M68K_H
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#define TC_M68K_H
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#define TC_M68K 1
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struct fix;
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#define TARGET_BYTES_BIG_ENDIAN 1
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#define TARGET_FORMAT "elf32-m68k"
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#define TARGET_ARCH bfd_arch_m68k
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#define tc_comment_chars m68k_comment_chars
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extern const char *m68k_comment_chars;
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#define LISTING_WORD_SIZE 2 /* A word is 2 bytes */
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#define LISTING_LHS_WIDTH 2 /* One word on the first line */
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#define LISTING_LHS_WIDTH_SECOND 2 /* One word on the second line */
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#define LISTING_LHS_CONT_LINES 4/* And 4 lines max */
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#define LISTING_HEADER "68K GAS "
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#ifndef REGISTER_PREFIX
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#define REGISTER_PREFIX '%'
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#endif
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#ifndef REGISTER_PREFIX_OPTIONAL
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#define REGISTER_PREFIX_OPTIONAL 0
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#endif
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extern void m68k_mri_mode_change (int);
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#define MRI_MODE_CHANGE(i) m68k_mri_mode_change (i)
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extern int m68k_conditional_pseudoop (const pseudo_typeS *);
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#define tc_conditional_pseudoop(pop) m68k_conditional_pseudoop (pop)
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extern void m68k_frob_label (symbolS *);
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#define tc_frob_label(sym) m68k_frob_label (sym)
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extern void m68k_flush_pending_output (void);
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#define md_flush_pending_output() m68k_flush_pending_output ()
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extern void m68k_frob_symbol (symbolS *);
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#define tc_frob_symbol(sym,punt) \
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do \
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{ \
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if (S_GET_SEGMENT (sym) == reg_section) \
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punt = 1; \
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m68k_frob_symbol (sym); \
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} \
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while (0)
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#define NO_RELOC BFD_RELOC_NONE
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#define RELAX_RELOC_ABS8 BFD_RELOC_8
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#define RELAX_RELOC_ABS16 BFD_RELOC_16
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#define RELAX_RELOC_ABS32 BFD_RELOC_32
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#define RELAX_RELOC_PC8 BFD_RELOC_8_PCREL
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#define RELAX_RELOC_PC16 BFD_RELOC_16_PCREL
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#define RELAX_RELOC_PC32 BFD_RELOC_32_PCREL
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#define tc_fix_adjustable(X) tc_m68k_fix_adjustable(X)
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extern int tc_m68k_fix_adjustable (struct fix *);
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/* Target *-*-elf implies an embedded target. No shared libs.
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*-*-uclinux also requires special casing to prevent GAS from
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generating unsupported R_68K_PC16 relocs. */
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#define EXTERN_FORCE_RELOC \
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((strcmp (TARGET_OS, "elf") != 0) && (strcmp (TARGET_OS, "uclinux") != 0))
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/* Values passed to md_apply_fix don't include symbol values. */
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#define MD_APPLY_SYM_VALUE(FIX) 0
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#define elf_tc_final_processing m68k_elf_final_processing
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extern void m68k_elf_final_processing (void);
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#define DIFF_EXPR_OK
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extern int m68k_parse_long_option (char *);
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#define md_parse_long_option m68k_parse_long_option
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#define md_operand(x)
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extern struct relax_type md_relax_table[];
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#define TC_GENERIC_RELAX_TABLE md_relax_table
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/* We can't do a byte jump to the next instruction, so in that case
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force word mode by faking AIM. */
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#define md_prepare_relax_scan(fragP, address, aim, this_state, this_type) \
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do \
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{ \
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if (aim == 0 && this_type->rlx_forward == 127) \
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aim = 128; \
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} \
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while (0)
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#define DWARF2_LINE_MIN_INSN_LENGTH 2
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/* We want .cfi_* pseudo-ops for generating unwind info. */
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#define TARGET_USE_CFIPOP 1
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#define DWARF2_DEFAULT_RETURN_COLUMN 24
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#define DWARF2_CIE_DATA_ALIGNMENT (-4)
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#define tc_regname_to_dw2regnum tc_m68k_regname_to_dw2regnum
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extern int tc_m68k_regname_to_dw2regnum (const char *regname);
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#define tc_cfi_frame_initial_instructions tc_m68k_frame_initial_instructions
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extern void tc_m68k_frame_initial_instructions (void);
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#ifdef TE_UCLINUX
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/* elf2flt does not honor PT_LOAD's from the executable.
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.text and .eh_frame sections will not end up in the same segment and so
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we cannot use PC-relative encoding for CFI. */
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# define CFI_DIFF_EXPR_OK 0
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/* However, follow compiler's guidance when it specifies encoding for LSDA. */
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# define CFI_DIFF_LSDA_OK 1
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#endif
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struct broken_word;
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#define TC_CHECK_ADJUSTED_BROKEN_DOT_WORD(new_offset, brokw) \
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tc_m68k_check_adjusted_broken_word ((offsetT) (new_offset), (brokw))
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extern void tc_m68k_check_adjusted_broken_word (offsetT,
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struct broken_word *);
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/* We want to warn if any text labels are misaligned. In order to get
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the right line number, we need to record the line number for each
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label. */
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struct m68k_tc_sy
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{
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const char *file;
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unsigned int line;
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int text;
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};
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#define TC_SYMFIELD_TYPE struct m68k_tc_sy
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#endif /* TC_M68K_H */
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