diff options
Diffstat (limited to 'gcc/graphite-sese-to-poly.c')
| -rw-r--r-- | gcc/graphite-sese-to-poly.c | 23 |
1 files changed, 22 insertions, 1 deletions
diff --git a/gcc/graphite-sese-to-poly.c b/gcc/graphite-sese-to-poly.c index 807e287..75d10c6 100644 --- a/gcc/graphite-sese-to-poly.c +++ b/gcc/graphite-sese-to-poly.c @@ -2213,6 +2213,22 @@ nb_pbbs_in_loops (scop_p scop) return res; } +/* Return the number of data references in BB that write in + memory. */ + +static int +nb_data_writes_in_bb (basic_block bb) +{ + int res = 0; + gimple_stmt_iterator gsi; + + for (gsi = gsi_start_bb (bb); !gsi_end_p (gsi); gsi_next (&gsi)) + if (gimple_vdef (gsi_stmt (gsi))) + res++; + + return res; +} + /* Splits STMT out of its current BB. */ static basic_block @@ -2222,6 +2238,11 @@ split_reduction_stmt (gimple stmt) basic_block bb = gimple_bb (stmt); edge e; + /* Do not split basic blocks with no writes to memory: the reduction + will be the only write to memory. */ + if (nb_data_writes_in_bb (bb) == 0) + return bb; + split_block (bb, stmt); gsi = gsi_last_bb (bb); @@ -2444,7 +2465,7 @@ translate_scalar_reduction_to_array_for_stmt (tree red, gimple stmt, gsi_insert_before (&insert_gsi, assign, GSI_SAME_STMT); assign = gimple_build_assign (red, gimple_assign_lhs (stmt)); - insert_gsi = gsi_last_bb (bb); + insert_gsi = gsi_for_stmt (stmt); gsi_insert_after (&insert_gsi, assign, GSI_SAME_STMT); } |