remove trivialy unused variables

gdb/ChangeLog:

2016-05-07  Trevor Saunders  <tbsaunde+binutils@tbsaunde.org>

	* aarch64-linux-tdep.c (aarch64_linux_sigframe_init): Remove unused
	variables.
	* aarch64-tdep.c (aarch64_skip_prologue): Likewise.
	(aarch64_scan_prologue): Likewise.
	(aarch64_prologue_prev_register): Likewise.
	(aarch64_dwarf2_prev_register): Likewise.
	(pass_in_v): Likewise.
	(aarch64_push_dummy_call): Likewise.
	(aarch64_breakpoint_from_pc): Likewise.
	(aarch64_return_in_memory): Likewise.
	(aarch64_return_value): Likewise.
	(aarch64_displaced_step_b_cond): Likewise.
	(aarch64_displaced_step_cb): Likewise.
	(aarch64_displaced_step_tb): Likewise.
	(aarch64_gdbarch_init): Likewise.
	(aarch64_process_record): Likewise.
	* alpha-mdebug-tdep.c (alpha_mdebug_init_abi): Likewise.
	* alpha-tdep.c (_initialize_alpha_tdep): Likewise.
	* amd64-dicos-tdep.c (amd64_dicos_init_abi): Likewise.
	* amd64-linux-tdep.c (amd64_dtrace_parse_probe_argument): Likewise.
	* amd64-tdep.c (fixup_riprel): Likewise.
	* amd64-windows-tdep.c (amd64_windows_frame_decode_epilogue): Likewise.
	(amd64_windows_frame_decode_insns): Likewise.
	(amd64_windows_frame_cache): Likewise.
	(amd64_windows_frame_prev_register): Likewise.
	(amd64_windows_frame_this_id): Likewise.
	(amd64_windows_init_abi): Likewise.
	* arm-linux-tdep.c (arm_linux_get_syscall_number): Likewise.
	(arm_linux_get_next_pcs_syscall_next_pc): Likewise.
	* arm-symbian-tdep.c (arm_symbian_init_abi): Likewise.
	* arm-tdep.c (arm_make_epilogue_frame_cache): Likewise.
	(arm_epilogue_frame_prev_register): Likewise.
	(arm_record_vdata_transfer_insn): Likewise.
	(arm_record_exreg_ld_st_insn): Likewise.
	* auto-load.c (execute_script_contents): Likewise.
	(print_scripts): Likewise.
	* avr-tdep.c (avr_frame_prev_register): Likewise.
	(avr_push_dummy_call): Likewise.
	* bfin-linux-tdep.c (bfin_linux_sigframe_init): Likewise.
	* bfin-tdep.c (bfin_gdbarch_init): Likewise.
	* blockframe.c (find_pc_partial_function_gnu_ifunc): Likewise.
	* break-catch-throw.c (fetch_probe_arguments): Likewise.
	* breakpoint.c (breakpoint_xfer_memory): Likewise.
	(breakpoint_init_inferior): Likewise.
	(breakpoint_inserted_here_p): Likewise.
	(software_breakpoint_inserted_here_p): Likewise.
	(hardware_breakpoint_inserted_here_p): Likewise.
	(bpstat_what): Likewise.
	(break_range_command): Likewise.
	(save_breakpoints): Likewise.
	* coffread.c (coff_symfile_read): Likewise.
	* cris-tdep.c (cris_push_dummy_call): Likewise.
	(cris_scan_prologue): Likewise.
	(cris_register_size): Likewise.
	(_initialize_cris_tdep): Likewise.
	* d-exp.y: Likewise.
	* dbxread.c (dbx_read_symtab): Likewise.
	(process_one_symbol): Likewise.
	(coffstab_build_psymtabs): Likewise.
	(elfstab_build_psymtabs): Likewise.
	* dicos-tdep.c (dicos_init_abi): Likewise.
	* disasm.c (do_mixed_source_and_assembly): Likewise.
	(gdb_disassembly): Likewise.
	* dtrace-probe.c (dtrace_process_dof): Likewise.
	* dwarf2read.c (error_check_comp_unit_head): Likewise.
	(build_type_psymtabs_1): Likewise.
	(skip_one_die): Likewise.
	(process_imported_unit_die): Likewise.
	(dwarf2_physname): Likewise.
	(read_file_scope): Likewise.
	(setup_type_unit_groups): Likewise.
	(create_dwo_cu_reader): Likewise.
	(create_dwo_cu): Likewise.
	(create_dwo_unit_in_dwp_v1): Likewise.
	(create_dwo_unit_in_dwp_v2): Likewise.
	(lookup_dwo_unit_in_dwp): Likewise.
	(free_dwo_file): Likewise.
	(check_producer): Likewise.
	(dwarf2_add_typedef): Likewise.
	(dwarf2_add_member_fn): Likewise.
	(read_unsigned_leb128): Likewise.
	(read_signed_leb128): Likewise.
	(dwarf2_const_value): Likewise.
	(follow_die_sig_1): Likewise.
	(dwarf_decode_macro_bytes): Likewise.
	* extension.c (restore_active_ext_lang): Likewise.
	* frv-linux-tdep.c (frv_linux_sigtramp_frame_cache): Likewise.
	* ft32-tdep.c (ft32_analyze_prologue): Likewise.
	* gdbtypes.c (lookup_typename): Likewise.
	(resolve_dynamic_range): Likewise.
	(check_typedef): Likewise.
	* h8300-tdep.c (h8300_is_argument_spill): Likewise.
	(h8300_gdbarch_init): Likewise.
	* hppa-tdep.c (hppa32_push_dummy_call): Likewise.
	(hppa_frame_this_id): Likewise.
	(_initialize_hppa_tdep): Likewise.
	* hppanbsd-tdep.c (hppanbsd_sigtramp_cache_init): Likewise.
	* hppaobsd-tdep.c (hppaobsd_supply_fpregset): Likewise.
	* i386-dicos-tdep.c (i386_dicos_init_abi): Likewise.
	* i386-tdep.c (i386_bnd_type): Likewise.
	(i386_gdbarch_init): Likewise.
	(i386_mpx_bd_base): Likewise.
	* i386nbsd-tdep.c (i386nbsd_sigtramp_cache_init): Likewise.
	* i386obsd-tdep.c (i386obsd_elf_init_abi): Likewise.
	* ia64-tdep.c (examine_prologue): Likewise.
	(ia64_frame_cache): Likewise.
	(ia64_push_dummy_call): Likewise.
	* infcmd.c (finish_command_fsm_async_reply_reason): Likewise.
	(default_print_one_register_info): Likewise.
	* infrun.c (infrun_thread_ptid_changed): Likewise.
	(thread_still_needs_step_over): Likewise.
	(stop_all_threads): Likewise.
	(restart_threads): Likewise.
	(keep_going_stepped_thread): Likewise.
	* iq2000-tdep.c (iq2000_scan_prologue): Likewise.
	* language.c (language_init_primitive_type_symbols): Likewise.
	* linespec.c (add_sal_to_sals): Likewise.
	* linux-nat.c (status_callback): Likewise.
	(kill_unfollowed_fork_children): Likewise.
	(linux_nat_kill): Likewise.
	* linux-tdep.c (linux_fill_prpsinfo): Likewise.
	* linux-thread-db.c (thread_db_notice_clone): Likewise.
	(record_thread): Likewise.
	* location.c (string_to_event_location_basic): Likewise.
	* m32c-tdep.c (m32c_prev_register): Likewise.
	* m32r-linux-tdep.c (m32r_linux_init_abi): Likewise.
	* m32r-tdep.c (decode_prologue): Likewise.
	* m68klinux-tdep.c (m68k_linux_sigtramp_frame_cache): Likewise.
	* machoread.c (macho_symtab_read): Likewise.
	(macho_symfile_read): Likewise.
	(macho_symfile_offsets): Likewise.
	* maint.c (set_per_command_cmd): Likewise.
	* mi/mi-cmd-stack.c (mi_cmd_stack_list_locals): Likewise.
	(mi_cmd_stack_list_variables): Likewise.
	* mi/mi-main.c (mi_cmd_exec_run): Likewise.
	(output_register): Likewise.
	(mi_cmd_execute): Likewise.
	(mi_cmd_trace_define_variable): Likewise.
	(print_variable_or_computed): Likewise.
	* minsyms.c (prim_record_minimal_symbol_full): Likewise.
	* mn10300-tdep.c (mn10300_frame_prev_register): Likewise.
	* msp430-tdep.c (msp430_pseudo_register_write): Likewise.
	* mt-tdep.c (mt_registers_info): Likewise.
	* nios2-tdep.c (nios2_analyze_prologue): Likewise.
	(nios2_push_dummy_call): Likewise.
	(nios2_frame_unwind_cache): Likewise.
	(nios2_stub_frame_cache): Likewise.
	(nios2_stub_frame_sniffer): Likewise.
	(nios2_gdbarch_init): Likewise.
	* ppc-ravenscar-thread.c: Likewise.
	* ppcfbsd-tdep.c (ppcfbsd_sigtramp_frame_cache): Likewise.
	* python/py-evts.c (add_new_registry): Likewise.
	* python/py-finishbreakpoint.c (bpfinishpy_init): Likewise.
	(bpfinishpy_detect_out_scope_cb): Likewise.
	* python/py-framefilter.c (py_print_value): Likewise.
	* python/py-inferior.c (infpy_write_memory): Likewise.
	* python/py-infevents.c (create_inferior_call_event_object): Likewise.
	* python/py-infthread.c (thpy_get_ptid): Likewise.
	* python/py-linetable.c (ltpy_get_pcs_for_line): Likewise.
	(ltpy_get_all_source_lines): Likewise.
	(ltpy_is_valid): Likewise.
	(ltpy_iternext): Likewise.
	* python/py-symtab.c (symtab_and_line_to_sal_object): Likewise.
	* python/py-unwind.c (pyuw_object_attribute_to_pointer): Likewise.
	(unwind_infopy_str): Likewise.
	* python/py-varobj.c (py_varobj_get_iterator): Likewise.
	* ravenscar-thread.c (ravenscar_inferior_created): Likewise.
	* rs6000-aix-tdep.c (rs6000_push_dummy_call): Likewise.
	* rs6000-lynx178-tdep.c (rs6000_lynx178_push_dummy_call): Likewise.
	* rs6000-tdep.c (ppc_deal_with_atomic_sequence): Likewise.
	* s390-linux-tdep.c (s390_supply_tdb_regset): Likewise.
	(s390_frame_prev_register): Likewise.
	(s390_dwarf2_frame_init_reg): Likewise.
	(s390_record_vr): Likewise.
	(s390_process_record): Likewise.
	* score-tdep.c (score_push_dummy_call): Likewise.
	(score3_analyze_prologue): Likewise.
	* sh-tdep.c (sh_extract_return_value_nofpu): Likewise.
	* sh64-tdep.c (sh64_analyze_prologue): Likewise.
	(sh64_push_dummy_call): Likewise.
	(sh64_extract_return_value): Likewise.
	(sh64_do_fp_register): Likewise.
	* solib-aix.c (solib_aix_get_section_offsets): Likewise.
	* solib-darwin.c (darwin_read_exec_load_addr_from_dyld): Likewise.
	(darwin_solib_read_all_image_info_addr): Likewise.
	* solib-dsbt.c (enable_break): Likewise.
	* solib-frv.c (enable_break2): Likewise.
	(frv_fdpic_find_canonical_descriptor): Likewise.
	* solib-svr4.c (svr4_handle_solib_event): Likewise.
	* sparc-tdep.c (sparc_skip_stack_check): Likewise.
	* sparc64-linux-tdep.c (sparc64_linux_get_longjmp_target): Likewise.
	* sparcobsd-tdep.c (sparc32obsd_init_abi): Likewise.
	* spu-tdep.c (info_spu_dma_cmdlist): Likewise.
	* stack.c (read_frame_local): Likewise.
	* symfile.c (symbol_file_add_separate): Likewise.
	(remove_symbol_file_command): Likewise.
	* symmisc.c (maintenance_print_one_line_table): Likewise.
	* symtab.c (symbol_cache_flush): Likewise.
	(basic_lookup_transparent_type): Likewise.
	(sort_search_symbols_remove_dups): Likewise.
	* target.c (target_memory_map): Likewise.
	(target_detach): Likewise.
	(target_resume): Likewise.
	(acquire_fileio_fd): Likewise.
	(target_store_registers): Likewise.
	* thread.c (print_thread_info_1): Likewise.
	* tic6x-tdep.c (tic6x_analyze_prologue): Likewise.
	* tilegx-linux-tdep.c (tilegx_linux_sigframe_init): Likewise.
	* tilegx-tdep.c (tilegx_push_dummy_call): Likewise.
	(tilegx_analyze_prologue): Likewise.
	(tilegx_stack_frame_destroyed_p): Likewise.
	(tilegx_frame_cache): Likewise.
	* tracefile.c (trace_save): Likewise.
	* tracepoint.c (encode_actions_and_make_cleanup): Likewise.
	(start_tracing): Likewise.
	(print_one_static_tracepoint_marker): Likewise.
	* tui/tui.c (tui_enable): Likewise.
	* valops.c (value_struct_elt_bitpos): Likewise.
	(find_overload_match): Likewise.
	(find_oload_champ): Likewise.
	* value.c (value_contents_copy_raw): Likewise.
	* windows-tdep.c (windows_get_tlb_type): Likewise.
	* x86-linux-nat.c (x86_linux_enable_btrace): Likewise.
	* xcoffread.c (record_minimal_symbol): Likewise.
	(scan_xcoff_symtab): Likewise.
	* xtensa-tdep.c (execute_code): Likewise.
	(xtensa_gdbarch_init): Likewise.
	(_initialize_xtensa_tdep): Likewise.

1 files changed, 3 insertions, 38 deletions

diff --git a/gdb/dwarf2read.c b/gdb/dwarf2read.c
index eb81151..f526619 100644
--- a/gdb/dwarf2read.c
+++ b/gdb/dwarf2read.c
@@ -4381,7 +4381,6 @@ error_check_comp_unit_head (struct comp_unit_head *header,
 			    struct dwarf2_section_info *section,
 			    struct dwarf2_section_info *abbrev_section)
 {
-  bfd *abfd = get_section_bfd_owner (section);
   const char *filename = get_section_file_name (section);
 
   if (header->version != 2 && header->version != 3 && header->version != 4)
@@ -6181,13 +6180,11 @@ sort_tu_by_abbrev_offset (const void *ap, const void *bp)
 static void
 build_type_psymtabs_1 (void)
 {
-  struct objfile *objfile = dwarf2_per_objfile->objfile;
   struct tu_stats *tu_stats = &dwarf2_per_objfile->tu_stats;
   struct cleanup *cleanups;
   struct abbrev_table *abbrev_table;
   sect_offset abbrev_offset;
   struct tu_abbrev_offset *sorted_by_abbrev;
-  struct type_unit_group **iter;
   int i;
 
   /* It's up to the caller to not call us multiple times.  */
@@ -7258,7 +7255,6 @@ skip_one_die (const struct die_reader_specs *reader, const gdb_byte *info_ptr,
   struct dwarf2_cu *cu = reader->cu;
   const gdb_byte *buffer = reader->buffer;
   const gdb_byte *buffer_end = reader->buffer_end;
-  const gdb_byte *start_info_ptr = info_ptr;
   unsigned int form, i;
 
   for (i = 0; i < abbrev->num_attrs; i++)
@@ -8212,7 +8208,6 @@ process_imported_unit_die (struct die_info *die, struct dwarf2_cu *cu)
   if (attr != NULL)
     {
       struct dwarf2_per_cu_data *per_cu;
-      struct symtab *imported_symtab;
       sect_offset offset;
       int is_dwz;
 
@@ -8703,7 +8698,6 @@ static const char *
 dwarf2_physname (const char *name, struct die_info *die, struct dwarf2_cu *cu)
 {
   struct objfile *objfile = cu->objfile;
-  struct attribute *attr;
   const char *retval, *mangled = NULL, *canon = NULL;
   struct cleanup *back_to;
   int need_copy = 1;
@@ -9198,7 +9192,6 @@ read_file_scope (struct die_info *die, struct dwarf2_cu *cu)
   const char *name = NULL;
   const char *comp_dir = NULL;
   struct die_info *child_die;
-  bfd *abfd = objfile->obfd;
   CORE_ADDR baseaddr;
 
   baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
@@ -9279,7 +9272,6 @@ read_file_scope (struct die_info *die, struct dwarf2_cu *cu)
 static void
 setup_type_unit_groups (struct die_info *die, struct dwarf2_cu *cu)
 {
-  struct objfile *objfile = dwarf2_per_objfile->objfile;
   struct dwarf2_per_cu_data *per_cu = cu->per_cu;
   struct type_unit_group *tu_group;
   int first_time;
@@ -9536,7 +9528,6 @@ create_dwo_cu_reader (const struct die_reader_specs *reader,
 		      void *datap)
 {
   struct dwarf2_cu *cu = reader->cu;
-  struct objfile *objfile = dwarf2_per_objfile->objfile;
   sect_offset offset = cu->per_cu->offset;
   struct dwarf2_section_info *section = cu->per_cu->section;
   struct create_dwo_cu_data *data = (struct create_dwo_cu_data *) datap;
@@ -9573,8 +9564,6 @@ create_dwo_cu (struct dwo_file *dwo_file)
 {
   struct objfile *objfile = dwarf2_per_objfile->objfile;
   struct dwarf2_section_info *section = &dwo_file->sections.info;
-  bfd *abfd;
-  htab_t cu_htab;
   const gdb_byte *info_ptr, *end_ptr;
   struct create_dwo_cu_data create_dwo_cu_data;
   struct dwo_unit *dwo_unit;
@@ -9585,10 +9574,6 @@ create_dwo_cu (struct dwo_file *dwo_file)
   if (info_ptr == NULL)
     return NULL;
 
-  /* We can't set abfd until now because the section may be empty or
-     not present, in which case section->asection will be NULL.  */
-  abfd = get_section_bfd_owner (section);
-
   if (dwarf_read_debug)
     {
       fprintf_unfiltered (gdb_stdlog, "Reading %s for %s:\n",
@@ -10029,7 +10014,6 @@ create_dwo_unit_in_dwp_v1 (struct dwp_file *dwp_file,
   struct virtual_v1_dwo_sections sections;
   void **dwo_file_slot;
   char *virtual_dwo_name;
-  struct dwarf2_section_info *cutu;
   struct cleanup *cleanups;
   int i;
 
@@ -10235,7 +10219,6 @@ create_dwo_unit_in_dwp_v2 (struct dwp_file *dwp_file,
   struct virtual_v2_dwo_sections sections;
   void **dwo_file_slot;
   char *virtual_dwo_name;
-  struct dwarf2_section_info *cutu;
   struct cleanup *cleanups;
   int i;
 
@@ -10405,7 +10388,7 @@ lookup_dwo_unit_in_dwp (struct dwp_file *dwp_file, const char *comp_dir,
   uint32_t hash2 = ((signature >> 32) & mask) | 1;
   unsigned int i;
   void **slot;
-  struct dwo_unit find_dwo_cu, *dwo_cu;
+  struct dwo_unit find_dwo_cu;
 
   memset (&find_dwo_cu, 0, sizeof (find_dwo_cu));
   find_dwo_cu.signature = signature;
@@ -11150,8 +11133,6 @@ queue_and_load_all_dwo_tus (struct dwarf2_per_cu_data *per_cu)
 static void
 free_dwo_file (struct dwo_file *dwo_file, struct objfile *objfile)
 {
-  int ix;
-  struct dwarf2_section_info *section;
 
   /* Note: dbfd is NULL for virtual DWO files.  */
   gdb_bfd_unref (dwo_file->dbfd);
@@ -12354,7 +12335,6 @@ dwarf2_record_block_ranges (struct die_info *die, struct block *block,
 static void
 check_producer (struct dwarf2_cu *cu)
 {
-  const char *cs;
   int major, minor;
 
   if (cu->producer == NULL)
@@ -12654,11 +12634,8 @@ static void
 dwarf2_add_typedef (struct field_info *fip, struct die_info *die,
 		    struct dwarf2_cu *cu)
 {
-  struct objfile *objfile = cu->objfile;
   struct typedef_field_list *new_field;
-  struct attribute *attr;
   struct typedef_field *fp;
-  char *fieldname = "";
 
   /* Allocate a new field list entry and link it in.  */
   new_field = XCNEW (struct typedef_field_list);
@@ -12965,13 +12942,6 @@ dwarf2_add_member_fn (struct field_info *fip, struct die_info *die,
 		       && DW_BLOCK (attr)->data[0] == DW_OP_deref_size
 		       && DW_BLOCK (attr)->data[1] == cu->header.addr_size))
 	    {
-	      struct dwarf_block blk;
-	      int offset;
-
-	      offset = (DW_BLOCK (attr)->data[0] == DW_OP_deref
-			? 1 : 2);
-	      blk.size = DW_BLOCK (attr)->size - offset;
-	      blk.data = DW_BLOCK (attr)->data + offset;
 	      fnp->voffset = decode_locdesc (DW_BLOCK (attr), cu);
 	      if ((fnp->voffset % cu->header.addr_size) != 0)
 		dwarf2_complex_location_expr_complaint ();
@@ -16782,13 +16752,12 @@ read_unsigned_leb128 (bfd *abfd, const gdb_byte *buf,
 {
   ULONGEST result;
   unsigned int num_read;
-  int i, shift;
+  int shift;
   unsigned char byte;
 
   result = 0;
   shift = 0;
   num_read = 0;
-  i = 0;
   while (1)
     {
       byte = bfd_get_8 (abfd, buf);
@@ -16810,13 +16779,12 @@ read_signed_leb128 (bfd *abfd, const gdb_byte *buf,
 		    unsigned int *bytes_read_ptr)
 {
   LONGEST result;
-  int i, shift, num_read;
+  int shift, num_read;
   unsigned char byte;
 
   result = 0;
   shift = 0;
   num_read = 0;
-  i = 0;
   while (1)
     {
       byte = bfd_get_8 (abfd, buf);
@@ -18871,7 +18839,6 @@ dwarf2_const_value (const struct attribute *attr, struct symbol *sym,
 		    struct dwarf2_cu *cu)
 {
   struct objfile *objfile = cu->objfile;
-  struct comp_unit_head *cu_header = &cu->header;
   LONGEST value;
   const gdb_byte *bytes;
   struct dwarf2_locexpr_baton *baton;
@@ -20334,7 +20301,6 @@ static struct die_info *
 follow_die_sig_1 (struct die_info *src_die, struct signatured_type *sig_type,
 		  struct dwarf2_cu **ref_cu)
 {
-  struct objfile *objfile = (*ref_cu)->objfile;
   struct die_info temp_die;
   struct dwarf2_cu *sig_cu;
   struct die_info *die;
@@ -21517,7 +21483,6 @@ dwarf_decode_macro_bytes (bfd *abfd,
 	    void **slot;
 	    bfd *include_bfd = abfd;
 	    struct dwarf2_section_info *include_section = section;
-	    struct dwarf2_section_info alt_section;
 	    const gdb_byte *include_mac_end = mac_end;
 	    int is_dwz = section_is_dwz;
 	    const gdb_byte *new_mac_ptr;