[turbofan] Readjust has_slot_use after splintering

src/compiler/register-allocator.cc

Index: src/compiler/register-allocator.cc
diff --git a/src/compiler/register-allocator.cc b/src/compiler/register-allocator.cc
index d171502cc9fc153e2c7b44b0d4bc25585d8c4491..fb4d7f9aa1be53372ec8e93860c127c71c18190c 100644
--- a/src/compiler/register-allocator.cc
+++ b/src/compiler/register-allocator.cc
@@ -1041,6 +1041,8 @@ void TopLevelLiveRange::Merge(TopLevelLiveRange* other, Zone* zone) {
 
   TopLevel()->UpdateParentForAllChildren(TopLevel());
   TopLevel()->UpdateSpillRangePostMerge(other);
+  TopLevel()->set_has_slot_use(TopLevel()->has_slot_use() ||
+                               other->has_slot_use());
 
 #if DEBUG
   Verify();