Re: [rtlopt] Value profiling and optimalizations

["Joseph S. Myers" <jsm28 at cam dot ac dot uk>]

On Thu, 21 Nov 2002, Zdenek Dvorak wrote:

> 	* Makefile.in (vpt.o): New file.
> 	(toplev.o, profile.o): Add vpt.h dependecy.
> 	* vpt.h: New.
> 	* vpt.c: New.
> 	* combine.c (distribute_notes): Handle REG_VALUE_HISTOGRAM note.
> 	* flags.h (flag_value_histograms): Declare.
> 	* gcov-io.h (GCOV_TAG_VALUE_HISTOGRAMS): New.
> 	(struct function_info): Add n_value_histogram_counters field.
> 	(struct gcov_info): Add value_counts and n_value_counts fields.
> 	* libgcc2.c (gcov_exit, __gcov_flush): Write out value histograms.
> 	* profile.c: Include vpt.h.
> 	(struct function_list): Add value_counters field.
> 	(value_histograms_label): New.
> 	(gen_loop_profiler): Deleted.
> 	(gen_interval_profiler, gen_range_profiler, gen_pow2_profiler,
> 	gen_one_value_profiler): New.
> 	(get_histogram_counts, instrument_loops, compute_loop_histograms,
> 	init_branch_prob): Modified.
> 	(index_counts_file): Fix mistakes.
> 	(instrument_values, compute_value_histograms): New.
> 	(branch_prob): Call them.
> 	(create_profiler): Emit requiered structures.
> 	* profile.h (struct profile_info): Add count_value_counters,
> 	count_value_counters_now and have_value_histograms fields.
> 	* rtl.c (reg_note_name): Add REG_VALUE_HISTOGRAM.
> 	* rtl.h (enum reg_note): Ditto.
> 	* toplev.c: Include vpt.h.
> 	(enum dump_file_index, dump_file): Add vpt dump file.
> 	(flag_value_histograms, flag_value_profile_transformations): New.
> 	(lang_independent_options): Add them.
> 	(rest_of_compilation): Add vpt pass.

You're missing documentation - at least, for the new options in
invoke.texi, for the new RTL dump, and for the new source files in
passes.texi.  I don't know whether this branch requires documentation, but
the documentation is needed before this can be merged to mainline.

-- 
Joseph S. Myers
jsm28@cam.ac.uk