[turbofan] Inline the allocation fast path.

test/cctest/compiler/test-simplified-lowering.cc

Index: test/cctest/compiler/test-simplified-lowering.cc
diff --git a/test/cctest/compiler/test-simplified-lowering.cc b/test/cctest/compiler/test-simplified-lowering.cc
index f4f137482ea8c9fc1b732b2d9634e71a9bf0d177..a3cd6a7d7ec7ce84cb99dda864f3b0cce82a2bb1 100644
--- a/test/cctest/compiler/test-simplified-lowering.cc
+++ b/test/cctest/compiler/test-simplified-lowering.cc
@@ -67,8 +67,8 @@ class SimplifiedLoweringTester : public GraphBuilderTester<ReturnType> {
     EffectControlLinearizer linearizer(&jsgraph, schedule, this->zone());
     linearizer.Run();
 
-    ChangeLowering lowering(&jsgraph);
     GraphReducer reducer(this->zone(), this->graph());
+    ChangeLowering lowering(&reducer, &jsgraph);
     reducer.AddReducer(&lowering);
     reducer.ReduceGraph();
     Verifier::Run(this->graph());
@@ -738,8 +738,8 @@ class TestingGraph : public HandleAndZoneScope, public GraphAndBuilders {
     EffectControlLinearizer linearizer(&jsgraph, schedule, this->zone());
     linearizer.Run();
 
-    ChangeLowering lowering(&jsgraph);
     GraphReducer reducer(this->zone(), this->graph());
+    ChangeLowering lowering(&reducer, &jsgraph);
     reducer.AddReducer(&lowering);
     reducer.ReduceGraph();
     Verifier::Run(this->graph());