diff options
| author | Richard Biener <rguenth@gcc.gnu.org> | 2017-06-09 13:31:27 +0000 |
|---|---|---|
| committer | Richard Biener <rguenth@gcc.gnu.org> | 2017-06-09 13:31:27 +0000 |
| commit | 2866f21d191bb00c08f3a3c3a13af8b8f1a69ba4 (patch) | |
| tree | cd323d8176bfe332c019d14f9d5b04d1fe8be8f9 /gcc/tree-ssa-loop-im.c | |
| parent | 37b68a4389bd452e9b5aa03870f6b81e4f26b71c (diff) | |
| download | gcc-2866f21d191bb00c08f3a3c3a13af8b8f1a69ba4.zip gcc-2866f21d191bb00c08f3a3c3a13af8b8f1a69ba4.tar.gz gcc-2866f21d191bb00c08f3a3c3a13af8b8f1a69ba4.tar.bz2 | |
tree-ssa-loop-im.c (execute_sm): Do not force multi-threaded model if the ref is always written to.
2017-06-09 Richard Biener <rguenther@suse.de>
* tree-ssa-loop-im.c (execute_sm): Do not force multi-threaded
model if the ref is always written to.
From-SVN: r249063
Diffstat (limited to 'gcc/tree-ssa-loop-im.c')
| -rw-r--r-- | gcc/tree-ssa-loop-im.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/gcc/tree-ssa-loop-im.c b/gcc/tree-ssa-loop-im.c index 2dcb85d..e92eaa6 100644 --- a/gcc/tree-ssa-loop-im.c +++ b/gcc/tree-ssa-loop-im.c @@ -198,6 +198,7 @@ static bitmap_obstack lim_bitmap_obstack; static obstack mem_ref_obstack; static bool ref_indep_loop_p (struct loop *, im_mem_ref *, struct loop *); +static bool ref_always_accessed_p (struct loop *, im_mem_ref *, bool); /* Minimum cost of an expensive expression. */ #define LIM_EXPENSIVE ((unsigned) PARAM_VALUE (PARAM_LIM_EXPENSIVE)) @@ -2025,7 +2026,8 @@ execute_sm (struct loop *loop, vec<edge> exits, im_mem_ref *ref) for_each_index (&ref->mem.ref, force_move_till, &fmt_data); if (bb_in_transaction (loop_preheader_edge (loop)->src) - || !PARAM_VALUE (PARAM_ALLOW_STORE_DATA_RACES)) + || (! PARAM_VALUE (PARAM_ALLOW_STORE_DATA_RACES) + && ! ref_always_accessed_p (loop, ref, true))) multi_threaded_model_p = true; if (multi_threaded_model_p) |