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| author | Vladimir Makarov <vmakarov@redhat.com> | 2013-11-06 19:46:39 +0000 |
|---|---|---|
| committer | Vladimir Makarov <vmakarov@gcc.gnu.org> | 2013-11-06 19:46:39 +0000 |
| commit | f20f261304993444741e0f0a14d3147e591bc660 (patch) | |
| tree | 425edab80d5fb80caee33b5c43297c3c6bc2c90b /gcc/doc | |
| parent | 992147ee6bc698a938feb38546ca25ce8b977651 (diff) | |
| download | gcc-f20f261304993444741e0f0a14d3147e591bc660.zip gcc-f20f261304993444741e0f0a14d3147e591bc660.tar.gz gcc-f20f261304993444741e0f0a14d3147e591bc660.tar.bz2 | |
tree-pass.h (make_pass_live_range_shrinkage): New external.
2013-11-06 Vladimir Makarov <vmakarov@redhat.com>
* tree-pass.h (make_pass_live_range_shrinkage): New external.
* timevar.def (TV_LIVE_RANGE_SHRINKAGE): New.
* sched-rgn.c (gate_handle_live_range_shrinkage): New.
(rest_of_handle_live_range_shrinkage): Ditto
(class pass_live_range_shrinkage): Ditto.
(pass_data_live_range_shrinkage): Ditto.
(make_pass_live_range_shrinkage): Ditto.
* sched-int.h (initialize_live_range_shrinkage): New prototype.
(finish_live_range_shrinkage): Ditto.
* sched-deps.c (create_insn_reg_set): Make void return value.
* passes.def: Add pass_live_range_shrinkage.
* ira.c (update_equiv_regs): Don't move if
flag_live_range_shrinkage.
* haifa-sched.c (live_range_shrinkage_p): New.
(initialize_live_range_shrinkage, finish_live_range_shrinkage):
New functions.
(rank_for_schedule): Add code for pressure relief through live
range shrinkage.
(schedule_insn): Print more debug info.
(sched_init): Setup SCHED_PRESSURE_WEIGHTED for pressure relief
through live range shrinkage.
* doc/invoke.texi (-flive-range-shrinkage): New.
* common.opt (flive-range-shrinkage): New.
From-SVN: r204465
Diffstat (limited to 'gcc/doc')
| -rw-r--r-- | gcc/doc/invoke.texi | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/gcc/doc/invoke.texi b/gcc/doc/invoke.texi index b933b2a..0063445 100644 --- a/gcc/doc/invoke.texi +++ b/gcc/doc/invoke.texi @@ -377,7 +377,7 @@ Objective-C and Objective-C++ Dialects}. -fira-region=@var{region} -fira-hoist-pressure @gol -fira-loop-pressure -fno-ira-share-save-slots @gol -fno-ira-share-spill-slots -fira-verbose=@var{n} @gol --fivopts -fkeep-inline-functions -fkeep-static-consts @gol +-fivopts -fkeep-inline-functions -fkeep-static-consts -flive-range-shrinkage @gol -floop-block -floop-interchange -floop-strip-mine -floop-nest-optimize @gol -floop-parallelize-all -flto -flto-compression-level @gol -flto-partition=@var{alg} -flto-report -flto-report-wpa -fmerge-all-constants @gol @@ -7268,6 +7268,12 @@ registers after writing to their lower 32-bit half. Enabled for x86 at levels @option{-O2}, @option{-O3}. +@item -flive-range-shrinkage +@opindex flive-range-shrinkage +Attempt to decrease register pressure through register live range +shrinkage. This is helpful for fast processors with small or moderate +size register sets. + @item -fira-algorithm=@var{algorithm} Use the specified coloring algorithm for the integrated register allocator. The @var{algorithm} argument can be @samp{priority}, which |