[turbofan] avoid inserting AssertTypes after Unreachable

Bug: chromium:1348929
Change-Id: I14ce163dbebd7e83023286e210411e8a8208e238
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3804603
Auto-Submit: Tobias Tebbi <tebbi@chromium.org>
Commit-Queue: Nico Hartmann <nicohartmann@chromium.org>
Reviewed-by: Nico Hartmann <nicohartmann@chromium.org>
Cr-Commit-Position: refs/heads/main@{#82143}

src/compiler/add-type-assertions-reducer.cc

@@ -24,7 +24,7 @@ Reduction AddTypeAssertionsReducer::Reduce(Node* node) {
       node->opcode() == IrOpcode::kObjectState ||
       node->opcode() == IrOpcode::kObjectId ||
       node->opcode() == IrOpcode::kPhi || !NodeProperties::IsTyped(node) ||
-      visited_.Get(node)) {
+      node->opcode() == IrOpcode::kUnreachable || visited_.Get(node)) {
     return NoChange();
   }
   visited_.Set(node, true);