* Makefile.am (BFD32_LIBS): Add arange-set.lo.

(BFD32_LIBS_CFILES): Add arange-set.c.
  (SOURCE_HFILES): Add arange-set.h
  (dwarf2.lo): Add dependency upon arange-set.h.
  (arange-set.lo): New target.
* Makefile.in: Regenerate.
* arange-set.c: New file.
* arange-set.h: New file.
* dwarf2.c: Include arange-set.h.
  (struct dwarf2_debug) Add new fields comp_unit_count and comp_unit_arange_set.
  (struct comp_unit) Replace field arange with a new field arange_set.
  (dwarf2_arange_set_allocate, dwarf2_arange_set_deallocate,
  (dwarf2_combine_arange_value, dwarf2_arange_set_new,
  (dwarf2_arange_set_with_value_new, dwarf2_comp_unit_arange_add): New
  functions to utilize arange set in dwarf2.c.
  (arange_add): Formatting change for a line longer than 80 characters.
  (decode_line_info): Replace call target arange_add with
  (dwarf2_comp_unit_arange_add.
  (read_rangelist_insert_arange_list,
  (read_rangelist_comp_unit_arange_add): New functions used as callbacks
  for read_rangelist.
  (read_rangelist): Change interface to accept a callback and data to
  allow caller to select the action peformed on a new range list read.
  (scan_unit_for_symbols): Use new interface of read_rangelist.
  (parse_comp_unit): Create an arange set for each new comp unit.  Use new
  interface of read_rangelist.  Replace call to arange_add with that to
  dwarf2_comp_unit_arange_add.
  (comp_unit_contains_address): Replace sequential search with a call to
  arange_set_lookup_address, which can handles large set efficiently.
  (stash_copy_local_aranges, stash_maybe_enable_arange_set,
  (stash_find_nearest_line_fast): New functions maintaining and using a
  valued global arange set for all compilation units to speed up
  bfd_dwarf2_find_nearest_line.
  (find_line): Use global arange set.  Replace sequential search over all
  compilation units with a call to stash_find_nearest_line_fast.  Add
  book keeping to count number of compilation units.  Replace empty
  arange list test with a call to arange_set_empty_p.

bfd/Makefile.am

@@ -42,7 +42,7 @@ BFD32_LIBS = \
 	format.lo init.lo libbfd.lo opncls.lo reloc.lo \
 	section.lo syms.lo targets.lo hash.lo linker.lo \
 	srec.lo binary.lo tekhex.lo ihex.lo stabs.lo stab-syms.lo \
-	merge.lo dwarf2.lo simple.lo
+	merge.lo dwarf2.lo simple.lo arange-set.lo
 
 BFD64_LIBS = archive64.lo
 
@@ -52,7 +52,7 @@ BFD32_LIBS_CFILES = \
 	format.c init.c libbfd.c opncls.c reloc.c \
 	section.c syms.c targets.c hash.c linker.c \
 	srec.c binary.c tekhex.c ihex.c stabs.c stab-syms.c \
-	merge.c dwarf2.c simple.c
+	merge.c dwarf2.c simple.c arange-set.c
 
 BFD64_LIBS_CFILES = archive64.c
 
@@ -665,8 +665,8 @@ CFILES = $(SOURCE_CFILES) $(BUILD_CFILES)
 
 ## This is a list of all .h files which are in the source tree.
 SOURCE_HFILES = \
-	aout-target.h aoutf1.h aoutx.h coffcode.h coffswap.h ecoffswap.h \
-	elf-bfd.h elf-hppa.h elf32-hppa.h \
+	arange-set.h aout-target.h aoutf1.h aoutx.h coffcode.h coffswap.h \
+	ecoffswap.h elf-bfd.h elf-hppa.h elf32-hppa.h \
 	elf64-hppa.h elfcode.h elfcore.h \
 	freebsd.h genlink.h go32stub.h \
 	libaout.h libbfd.h libcoff.h libecoff.h libhppa.h libieee.h \
@@ -1049,7 +1049,9 @@ merge.lo: merge.c $(INCDIR)/filenames.h $(INCDIR)/hashtab.h \
 dwarf2.lo: dwarf2.c $(INCDIR)/filenames.h $(INCDIR)/libiberty.h \
   $(INCDIR)/hashtab.h elf-bfd.h $(INCDIR)/elf/common.h \
   $(INCDIR)/elf/internal.h $(INCDIR)/elf/external.h $(INCDIR)/bfdlink.h \
-  $(INCDIR)/elf/dwarf2.h
+  $(INCDIR)/elf/dwarf2.h arange-set.h
+arange-set.lo: arange-set.c arange-set.h $(INCDIR)/libiberty.h \
+  $(INCDIR)/splay-tree.h
 simple.lo: simple.c $(INCDIR)/filenames.h $(INCDIR)/hashtab.h \
   $(INCDIR)/bfdlink.h
 archive64.lo: archive64.c $(INCDIR)/filenames.h $(INCDIR)/hashtab.h \