From 28df87300a0dadffa5332e8a8e25688a7e62f5cd Mon Sep 17 00:00:00 2001 From: Michael Matz Date: Thu, 20 Oct 2016 12:18:32 +0000 Subject: loop splitting (approved at https://gcc.gnu.org/ml/gcc-patches/2015-12/msg00648.html ) * common.opt (-fsplit-loops): New flag. * passes.def (pass_loop_split): Add. * opts.c (default_options_table): Add OPT_fsplit_loops entry at -O3. (enable_fdo_optimizations): Add loop splitting. * timevar.def (TV_LOOP_SPLIT): Add. * tree-pass.h (make_pass_loop_split): Declare. * tree-ssa-loop-manip.h (rewrite_into_loop_closed_ssa_1): Declare. * tree-ssa-loop-unswitch.c: Include tree-ssa-loop-manip.h, * tree-ssa-loop-split.c: New file. * Makefile.in (OBJS): Add tree-ssa-loop-split.o. * doc/invoke.texi (fsplit-loops): Document. * doc/passes.texi (Loop optimization): Add paragraph about loop splitting. testsuite/ * gcc.dg/loop-split.c: New test. * gcc.dg/tree-ssa/ifc-9.c: Update. * gcc.dg/tree-ssa/ifc-10.c: Update. From-SVN: r241374 --- gcc/opts.c | 3 +++ 1 file changed, 3 insertions(+) (limited to 'gcc/opts.c') diff --git a/gcc/opts.c b/gcc/opts.c index 90e6186..5f44750 100644 --- a/gcc/opts.c +++ b/gcc/opts.c @@ -530,6 +530,7 @@ static const struct default_options default_options_table[] = regardless of them being declared inline. */ { OPT_LEVELS_3_PLUS_AND_SIZE, OPT_finline_functions, NULL, 1 }, { OPT_LEVELS_1_PLUS_NOT_DEBUG, OPT_finline_functions_called_once, NULL, 1 }, + { OPT_LEVELS_3_PLUS, OPT_fsplit_loops, NULL, 1 }, { OPT_LEVELS_3_PLUS, OPT_funswitch_loops, NULL, 1 }, { OPT_LEVELS_3_PLUS, OPT_fgcse_after_reload, NULL, 1 }, { OPT_LEVELS_3_PLUS, OPT_ftree_loop_vectorize, NULL, 1 }, @@ -1427,6 +1428,8 @@ enable_fdo_optimizations (struct gcc_options *opts, opts->x_flag_ipa_bit_cp = value; if (!opts_set->x_flag_predictive_commoning) opts->x_flag_predictive_commoning = value; + if (!opts_set->x_flag_split_loops) + opts->x_flag_split_loops = value; if (!opts_set->x_flag_unswitch_loops) opts->x_flag_unswitch_loops = value; if (!opts_set->x_flag_gcse_after_reload) -- cgit v1.1