Quick: In GVN, apply modifications early if outside loop.
To improve GVN performance, apply modifications to blocks
outside loops during the initial convergence phase. During
the post processing phase, apply modifications only to the
blocks belonging to loops.
Also clean up the check whether to run the LVN and add the
capability to limit the maximum number of nested loops we
allow the GVN to process.
Change-Id: Ie7f1254f91a442397c06a325d5d314d8f58e5012
diff --git a/compiler/dex/mir_graph.h b/compiler/dex/mir_graph.h
index 80303f6..a405af1 100644
--- a/compiler/dex/mir_graph.h
+++ b/compiler/dex/mir_graph.h
@@ -708,6 +708,10 @@
return &topological_order_loop_head_stack_;
}
+ size_t GetMaxNestedLoops() const {
+ return max_nested_loops_;
+ }
+
bool IsConst(int32_t s_reg) const {
return is_constant_v_->IsBitSet(s_reg);
}
@@ -1265,6 +1269,7 @@
ArenaVector<uint16_t> topological_order_indexes_;
// Stack of the loop head indexes and recalculation flags for RepeatingTopologicalSortIterator.
ArenaVector<std::pair<uint16_t, bool>> topological_order_loop_head_stack_;
+ size_t max_nested_loops_;
int* i_dom_list_;
std::unique_ptr<ScopedArenaAllocator> temp_scoped_alloc_;
uint16_t* temp_insn_data_;