[turbofan]: Elide extra move when accessing stack or frame register

test/cctest/compiler/test-run-stubs.cc

Index: test/cctest/compiler/test-run-stubs.cc
diff --git a/test/cctest/compiler/test-run-stubs.cc b/test/cctest/compiler/test-run-stubs.cc
index 4d2a363024abb0388b08052e08d53c50d8133a53..114a05976f249dd6d0af5929a6590f4c61b0c3fe 100644
--- a/test/cctest/compiler/test-run-stubs.cc
+++ b/test/cctest/compiler/test-run-stubs.cc
@@ -64,6 +64,16 @@ TEST(RunOptimizedMathFloorStub) {
 }
 
 
+TEST(RunUnoptimizedMathFloorStub) {
+  HandleAndZoneScope scope;
+  Isolate* isolate = scope.main_isolate();
+
+  // Create code and an accompanying descriptor.
+  MathFloorStub stub(isolate, TurboFanIC::CALL_FROM_UNOPTIMIZED_CODE);
+  stub.GenerateCode();
+}
+
+
 TEST(RunStringLengthTFStub) {
   HandleAndZoneScope scope;
   Isolate* isolate = scope.main_isolate();