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| author | Feng Xue <fxue@os.amperecomputing.com> | 2019-06-13 04:17:42 +0000 |
|---|---|---|
| committer | Feng Xue <fxue@gcc.gnu.org> | 2019-06-13 04:17:42 +0000 |
| commit | c29c92c789d93848cc1c929838771bfc68cb272c (patch) | |
| tree | 10a08875fb9bec9119ac6c0fa419923b9ac48654 /gcc/opts.c | |
| parent | 9b884225bfc609606f9b169b021c4da93feba48e (diff) | |
| download | gcc-c29c92c789d93848cc1c929838771bfc68cb272c.zip gcc-c29c92c789d93848cc1c929838771bfc68cb272c.tar.gz gcc-c29c92c789d93848cc1c929838771bfc68cb272c.tar.bz2 | |
PR tree-optimization/89713 - Assume loop with an exit is finite
gcc/ChangeLog:
* doc/invoke.texi (-ffinite-loops): Document new option.
* common.opt (-ffinite-loops): New option.
* tree-ssa-dce.c (mark_stmt_if_obviously_necessary): Mark
IFN_GOACC_LOOP calls as necessary.
* tree-ssa-loop-niter.c (finite_loop_p): Assume loop with an exit
is finite.
* omp-offload.c (oacc_xform_loop): Skip lowering if return value of
IFN_GOACC_LOOP call is not used.
* opts.c (default_options_table): Enable -ffinite-loops at -O2+.
gcc/testsuite/ChangeLog:
* g++.dg/tree-ssa/empty-loop.C: New test.
* gcc.dg/tree-ssa/dce-2.c: New test.
* gcc.dg/const-1.c: Add -fno-finite-loops option.
* gcc.dg/graphite/graphite.exp: Likewise.
* gcc.dg/loop-unswitch-1.c: Likewise.
* gcc.dg/predict-9.c: Likewise.
* gcc.dg/pure-2.c: Likewise.
* gcc.dg/tree-ssa/20040211-1.c: Likewise.
* gcc.dg/tree-ssa/loop-10.c: Likewise.
* gcc.dg/tree-ssa/split-path-6.c: Likewise.
* gcc.dg/tree-ssa/ssa-thread-12.c: Likewise.
libgomp/ChangeLog:
* testsuite/libgomp.oacc-c-c++-common/pr84955-1.c: New test.
From-SVN: r272234
Diffstat (limited to 'gcc/opts.c')
| -rw-r--r-- | gcc/opts.c | 1 |
1 files changed, 1 insertions, 0 deletions
@@ -494,6 +494,7 @@ static const struct default_options default_options_table[] = { OPT_LEVELS_2_PLUS, OPT_fdevirtualize, NULL, 1 }, { OPT_LEVELS_2_PLUS, OPT_fdevirtualize_speculatively, NULL, 1 }, { OPT_LEVELS_2_PLUS, OPT_fexpensive_optimizations, NULL, 1 }, + { OPT_LEVELS_2_PLUS, OPT_ffinite_loops, NULL, 1 }, { OPT_LEVELS_2_PLUS, OPT_fgcse, NULL, 1 }, { OPT_LEVELS_2_PLUS, OPT_fhoist_adjacent_loads, NULL, 1 }, { OPT_LEVELS_2_PLUS, OPT_findirect_inlining, NULL, 1 }, |