Hi,
this patch adds missing edge probabilities in expand_oacc_for, for the
tile and element loops that are generated when the tile clause is used.
Committed.
Thanks,
- Tom
Add missing edge probabilities in expand_oacc_for, tile case
;; basic block 11, loop depth 2, freq 0, maybe hot
;; prev block 22, next block 23, flags: (NEW, REACHABLE)
;; pred: 22 (TRUE_VALUE)
;; 24 (TRUE_VALUE)
...
if (.e_offset.15D.1971 < .e_bound.14D.1972)
- goto <bb 23>; [100.00%] [count: INV]
+ goto <bb 23>; [80.01%] [count: INV]
else
- goto <bb 24>; [INV] [count: INV]
+ goto <bb 24>; [19.99%] [count: INV]
;; basic block 23, loop depth 3, freq 0, maybe hot
;; prev block 11, next block 24, flags: (NEW)
;; pred: 11 [always] (TRUE_VALUE)
;; 23 (TRUE_VALUE)
ixD.1974 = .outer.4D.1967 + .e_offset.15D.1971;
.e_offset.15D.1971 = .e_offset.15D.1971 + .e_step.16D.1973;
if (.e_offset.15D.1971 < .e_bound.14D.1972)
- goto <bb 23>; [INV] [count: INV]
+ goto <bb 23>; [80.01%] [count: INV]
else
- goto <bb 24>; [100.00%] [count: INV]
+ goto <bb 24>; [19.99%] [count: INV]
2017-08-06 Tom de Vries <t...@codesourcery.com>
* omp-expand.c (expand_oacc_for): Add missing edge probability for tile
and element loops.
---
gcc/omp-expand.c | 11 +++++++++--
1 file changed, 9 insertions(+), 2 deletions(-)
diff --git a/gcc/omp-expand.c b/gcc/omp-expand.c
index 5772bd9..0a0098a 100644
--- a/gcc/omp-expand.c
+++ b/gcc/omp-expand.c
@@ -5663,9 +5663,16 @@ expand_oacc_for (struct omp_region *region, struct omp_for_data *fd)
cont_bb = split->dest;
split->flags ^= EDGE_FALLTHRU | EDGE_FALSE_VALUE;
- make_edge (elem_cont_bb, elem_body_bb, EDGE_TRUE_VALUE);
+ split->probability = profile_probability::unlikely ().guessed ();
+ edge latch_edge
+ = make_edge (elem_cont_bb, elem_body_bb, EDGE_TRUE_VALUE);
+ latch_edge->probability = profile_probability::likely ().guessed ();
- make_edge (body_bb, cont_bb, EDGE_FALSE_VALUE);
+ edge skip_edge = make_edge (body_bb, cont_bb, EDGE_FALSE_VALUE);
+ skip_edge->probability = profile_probability::unlikely ().guessed ();
+ edge loop_entry_edge = EDGE_SUCC (body_bb, 1 - skip_edge->dest_idx);
+ loop_entry_edge->probability
+ = profile_probability::likely ().guessed ();
gsi = gsi_for_stmt (cont_stmt);
}