17d184e5c4
The AArch64 SVE tlsdesc patterns were the main motivating reason for clobber_high. It's no longer needed now that the patterns use calls instead. At the time, one of the possible future uses for clobber_high was for asm statements. However, the current code wouldn't handle that case without modification, so I think we might as well remove it for now. We can always reapply it in future if it turns out to be useful again. 2019-10-01 Richard Sandiford <richard.sandiford@arm.com> gcc/ * rtl.def (CLOBBER_HIGH): Delete. * doc/rtl.texi (clobber_high): Remove documentation. * rtl.h (SET_DEST): Remove CLOBBER_HIGH from the list of codes. (reg_is_clobbered_by_clobber_high): Delete. (gen_hard_reg_clobber_high): Likewise. * alias.c (record_set): Remove CLOBBER_HIGH handling. * cfgexpand.c (expand_gimple_stmt): Likewise. * combine-stack-adj.c (single_set_for_csa): Likewise. * combine.c (find_single_use_1, set_nonzero_bits_and_sign_copies) (can_combine_p, is_parallel_of_n_reg_sets, try_combine) (record_dead_and_set_regs_1, reg_dead_at_p_1): Likewise. * cse.c (invalidate_reg): Remove clobber_high parameter. (invalidate): Update call accordingly. (canonicalize_insn): Remove CLOBBER_HIGH handling. (invalidate_from_clobbers, invalidate_from_sets_and_clobbers) (count_reg_usage, insn_live_p): Likewise. * cselib.h (cselib_invalidate_rtx): Remove sett argument. * cselib.c (cselib_invalidate_regno, cselib_invalidate_rtx): Likewise. (cselib_invalidate_rtx_note_stores): Update call accordingly. (cselib_expand_value_rtx_1): Remove CLOBBER_HIGH handling. (cselib_invalidate_regno, cselib_process_insn): Likewise. * dce.c (deletable_insn_p, mark_nonreg_stores_1): Likewise. (mark_nonreg_stores_2): Likewise. * df-scan.c (df_find_hard_reg_defs, df_uses_record): Likewise. (df_get_call_refs): Likewise. * dwarf2out.c (mem_loc_descriptor): Likewise. * emit-rtl.c (verify_rtx_sharing): Likewise. (copy_insn_1, copy_rtx_if_shared_1): Likewise. (hard_reg_clobbers_high, gen_hard_reg_clobber_high): Delete. * genconfig.c (walk_insn_part): Remove CLOBBER_HIGH handling. * genemit.c (gen_exp, gen_insn): Likewise. * genrecog.c (validate_pattern, remove_clobbers): Likewise. * haifa-sched.c (haifa_classify_rtx): Likewise. * ira-build.c (create_insn_allocnos): Likewise. * ira-costs.c (scan_one_insn): Likewise. * ira.c (equiv_init_movable_p, memref_referenced_p): Likewise. (rtx_moveable_p, interesting_dest_for_shprep): Likewise. * jump.c (mark_jump_label_1): Likewise. * lra-int.h (lra_insn_reg::clobber_high): Delete. * lra-eliminations.c (lra_eliminate_regs_1): Remove CLOBBER_HIGH handling. (mark_not_eliminable): Likewise. * lra-lives.c (process_bb_lives): Likewise. * lra.c (new_insn_reg): Remove clobber_high parameter. (collect_non_operand_hard_regs): Likewise. Update call to new insn_reg. Remove CLOBBER_HIGH handling. (lra_set_insn_recog_data): Remove CLOBBER_HIGH handling. Update call to collect_non_operand_hard_regs. (add_regs_to_insn_regno_info): Remove CLOBBER_HIGH handling. Update call to new_insn_reg. (lra_update_insn_regno_info): Remove CLOBBER_HIGH handling. * postreload.c (reload_cse_simplify, reload_combine_note_use) (move2add_note_store): Likewise. * print-rtl.c (print_pattern): Likewise. * recog.c (store_data_bypass_p_1, store_data_bypass_p): Likewise. (if_test_bypass_p): Likewise. * regcprop.c (kill_clobbered_value, kill_set_value): Likewise. * reginfo.c (reg_scan_mark_refs): Likewise. * reload1.c (maybe_fix_stack_asms, eliminate_regs_1): Likewise. (elimination_effects, mark_not_eliminable, scan_paradoxical_subregs) (forget_old_reloads_1): Likewise. * reorg.c (find_end_label, try_merge_delay_insns, redundant_insn) (own_thread_p, fill_simple_delay_slots, fill_slots_from_thread) (dbr_schedule): Likewise. * resource.c (update_live_status, mark_referenced_resources) (mark_set_resources): Likewise. * rtl.c (copy_rtx): Likewise. * rtlanal.c (reg_referenced_p, set_of_1, single_set_2, noop_move_p) (note_pattern_stores): Likewise. (reg_is_clobbered_by_clobber_high): Delete. * sched-deps.c (sched_analyze_reg, sched_analyze_insn): Remove CLOBBER_HIGH handling. From-SVN: r276393 |
||
|---|---|---|
| INSTALL | ||
| config | ||
| contrib | ||
| fixincludes | ||
| gcc | ||
| gnattools | ||
| gotools | ||
| include | ||
| intl | ||
| libada | ||
| libatomic | ||
| libbacktrace | ||
| libcc1 | ||
| libcpp | ||
| libdecnumber | ||
| libffi | ||
| libgcc | ||
| libgfortran | ||
| libgo | ||
| libgomp | ||
| libhsail-rt | ||
| libiberty | ||
| libitm | ||
| libobjc | ||
| liboffloadmic | ||
| libphobos | ||
| libquadmath | ||
| libsanitizer | ||
| libssp | ||
| libstdc++-v3 | ||
| libvtv | ||
| lto-plugin | ||
| maintainer-scripts | ||
| zlib | ||
| .dir-locals.el | ||
| .gitattributes | ||
| .gitignore | ||
| ABOUT-NLS | ||
| COPYING | ||
| COPYING.LIB | ||
| COPYING.RUNTIME | ||
| COPYING3 | ||
| COPYING3.LIB | ||
| ChangeLog | ||
| ChangeLog.jit | ||
| ChangeLog.tree-ssa | ||
| MAINTAINERS | ||
| Makefile.def | ||
| Makefile.in | ||
| Makefile.tpl | ||
| README | ||
| ar-lib | ||
| compile | ||
| config-ml.in | ||
| config.guess | ||
| config.rpath | ||
| config.sub | ||
| configure | ||
| configure.ac | ||
| depcomp | ||
| install-sh | ||
| libtool-ldflags | ||
| libtool.m4 | ||
| ltgcc.m4 | ||
| ltmain.sh | ||
| ltoptions.m4 | ||
| ltsugar.m4 | ||
| ltversion.m4 | ||
| lt~obsolete.m4 | ||
| missing | ||
| mkdep | ||
| mkinstalldirs | ||
| move-if-change | ||
| multilib.am | ||
| symlink-tree | ||
| test-driver | ||
| ylwrap | ||
README
This directory contains the GNU Compiler Collection (GCC). The GNU Compiler Collection is free software. See the files whose names start with COPYING for copying permission. The manuals, and some of the runtime libraries, are under different terms; see the individual source files for details. The directory INSTALL contains copies of the installation information as HTML and plain text. The source of this information is gcc/doc/install.texi. The installation information includes details of what is included in the GCC sources and what files GCC installs. See the file gcc/doc/gcc.texi (together with other files that it includes) for usage and porting information. An online readable version of the manual is in the files gcc/doc/gcc.info*. See http://gcc.gnu.org/bugs/ for how to report bugs usefully. Copyright years on GCC source files may be listed using range notation, e.g., 1987-2012, indicating that every year in the range, inclusive, is a copyrightable year that could otherwise be listed individually.