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| author | Bin Cheng <bin.cheng@arm.com> | 2016-10-13 11:05:53 +0000 |
|---|---|---|
| committer | Bin Cheng <amker@gcc.gnu.org> | 2016-10-13 11:05:53 +0000 |
| commit | b8a4b8c838f2796acd1dc1e5f89ba71701f8f135 (patch) | |
| tree | a31af6e945eb8035a06d564e234553169a350e31 /gcc | |
| parent | a5e3d6146d07611eb967befec4dc480c8a19db0d (diff) | |
| download | gcc-b8a4b8c838f2796acd1dc1e5f89ba71701f8f135.zip gcc-b8a4b8c838f2796acd1dc1e5f89ba71701f8f135.tar.gz gcc-b8a4b8c838f2796acd1dc1e5f89ba71701f8f135.tar.bz2 | |
tree-predcom.c (tree_predictive_commoning_loop): Skip loop that only iterates 1 time.
* tree-predcom.c (tree_predictive_commoning_loop): Skip loop that only
iterates 1 time.
gcc/testsuite
* gfortran.dg/vect/fast-math-mgrid-resid.f: New test string.
From-SVN: r241100
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/ChangeLog | 5 | ||||
| -rw-r--r-- | gcc/testsuite/ChangeLog | 4 | ||||
| -rw-r--r-- | gcc/testsuite/gfortran.dg/vect/fast-math-mgrid-resid.f | 1 | ||||
| -rw-r--r-- | gcc/tree-predcom.c | 9 |
4 files changed, 19 insertions, 0 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 74749ae..76ff093 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,5 +1,10 @@ 2016-10-13 Bin Cheng <bin.cheng@arm.com> + * tree-predcom.c (tree_predictive_commoning_loop): Skip loop that only + iterates 1 time. + +2016-10-13 Bin Cheng <bin.cheng@arm.com> + * tree-vect-loop-manip.c (adjust_vec_debug_stmts): Don't release adjust_vec automatically. (slpeel_add_loop_guard): Remove param cond_expr_stmt_list. Rename diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog index 25fd042..4612462 100644 --- a/gcc/testsuite/ChangeLog +++ b/gcc/testsuite/ChangeLog @@ -1,5 +1,9 @@ 2016-10-13 Bin Cheng <bin.cheng@arm.com> + * gfortran.dg/vect/fast-math-mgrid-resid.f: New test string. + +2016-10-13 Bin Cheng <bin.cheng@arm.com> + * gcc.dg/vect/vect-98.c: Refine test case. * gcc.dg/vect/vect-strided-a-u8-i8-gap2.c: Increase niters. * gcc.dg/vect/vect-strided-u8-i8-gap2.c: Ditto. diff --git a/gcc/testsuite/gfortran.dg/vect/fast-math-mgrid-resid.f b/gcc/testsuite/gfortran.dg/vect/fast-math-mgrid-resid.f index fcf475d..88238f9 100644 --- a/gcc/testsuite/gfortran.dg/vect/fast-math-mgrid-resid.f +++ b/gcc/testsuite/gfortran.dg/vect/fast-math-mgrid-resid.f @@ -42,3 +42,4 @@ C ! { dg-final { scan-tree-dump-times "Executing predictive commoning without unrolling" 1 "pcom" { target lp64 } } } ! { dg-final { scan-tree-dump-times "Executing predictive commoning without unrolling" 2 "pcom" { target ia32 } } } ! { dg-final { scan-tree-dump-times "Predictive commoning failed: no suitable chains" 0 "pcom" } } +! { dg-final { scan-tree-dump-times "Loop iterates only 1 time, nothing to do" 1 "pcom" } } diff --git a/gcc/tree-predcom.c b/gcc/tree-predcom.c index 096365a..14d53c2 100644 --- a/gcc/tree-predcom.c +++ b/gcc/tree-predcom.c @@ -2465,6 +2465,15 @@ tree_predictive_commoning_loop (struct loop *loop) if (dump_file && (dump_flags & TDF_DETAILS)) fprintf (dump_file, "Processing loop %d\n", loop->num); + /* Nothing for predicitive commoning if loop only iterates 1 time. */ + if (get_max_loop_iterations_int (loop) == 0) + { + if (dump_file && (dump_flags & TDF_DETAILS)) + fprintf (dump_file, "Loop iterates only 1 time, nothing to do.\n"); + + return false; + } + /* Find the data references and split them into components according to their dependence relations. */ auto_vec<loop_p, 3> loop_nest; |