diff options
Diffstat (limited to 'gcc/tree-predcom.c')
| -rw-r--r-- | gcc/tree-predcom.c | 24 |
1 files changed, 22 insertions, 2 deletions
diff --git a/gcc/tree-predcom.c b/gcc/tree-predcom.c index 047c7fa..d2dcfe7 100644 --- a/gcc/tree-predcom.c +++ b/gcc/tree-predcom.c @@ -767,6 +767,7 @@ split_data_refs_to_components (class loop *loop, /* Don't do store elimination if loop has multiple exit edges. */ bool eliminate_store_p = single_exit (loop) != NULL; basic_block last_always_executed = last_always_executed_block (loop); + auto_bitmap no_store_store_comps; FOR_EACH_VEC_ELT (datarefs, i, dr) { @@ -838,9 +839,13 @@ split_data_refs_to_components (class loop *loop, else if (DR_IS_READ (dra) && ib != bad) { if (ia == bad) - continue; + { + bitmap_set_bit (no_store_store_comps, ib); + continue; + } else if (!determine_offset (dra, drb, &dummy_off)) { + bitmap_set_bit (no_store_store_comps, ib); merge_comps (comp_father, comp_size, bad, ia); continue; } @@ -848,9 +853,13 @@ split_data_refs_to_components (class loop *loop, else if (DR_IS_READ (drb) && ia != bad) { if (ib == bad) - continue; + { + bitmap_set_bit (no_store_store_comps, ia); + continue; + } else if (!determine_offset (dra, drb, &dummy_off)) { + bitmap_set_bit (no_store_store_comps, ia); merge_comps (comp_father, comp_size, bad, ib); continue; } @@ -908,6 +917,17 @@ split_data_refs_to_components (class loop *loop, comp->refs.quick_push (dataref); } + if (eliminate_store_p) + { + bitmap_iterator bi; + EXECUTE_IF_SET_IN_BITMAP (no_store_store_comps, 0, ia, bi) + { + ca = component_of (comp_father, ia); + if (ca != bad) + comps[ca]->eliminate_store_p = false; + } + } + for (i = 0; i < n; i++) { comp = comps[i]; |