[turbofan] Skip spill operand ranges from spilled in deferred.

We don't need to treat as "spills in deferred blocks" ranges that have
no spill range, or that have a spill operand.

Review URL: https://codereview.chromium.org/1597883002

Cr-Commit-Position: refs/heads/master@{#33349}

src/compiler/live-range-separator.cc

@@ -120,7 +120,8 @@ void LiveRangeSeparator::Splinter() {
 
 void LiveRangeMerger::MarkRangesSpilledInDeferredBlocks() {
   for (TopLevelLiveRange *top : data()->live_ranges()) {
-    if (top == nullptr || top->IsEmpty() || top->splinter() == nullptr) {
+    if (top == nullptr || top->IsEmpty() || top->splinter() == nullptr ||
+        top->HasSpillOperand() || !top->splinter()->HasSpillRange()) {
       continue;
     }