[turbofan] Avoid obsolete steps in FunctionTester.

test/cctest/compiler/function-tester.h

Index: test/cctest/compiler/function-tester.h
diff --git a/test/cctest/compiler/function-tester.h b/test/cctest/compiler/function-tester.h
index b94d818081673e514aa3303b42dd57e54f3c3106..da3e39c48542a816418eeeb2ff235fc41cf94694 100644
--- a/test/cctest/compiler/function-tester.h
+++ b/test/cctest/compiler/function-tester.h
@@ -190,9 +190,10 @@ class FunctionTester : public InitializedHandleScope {
     }
     if (function->shared()->HasBytecodeArray()) {
       info.MarkAsOptimizeFromBytecode();
+    } else {
+      CHECK(Compiler::Analyze(info.parse_info()));
+      CHECK(Compiler::EnsureDeoptimizationSupport(&info));
     }
-    CHECK(Compiler::Analyze(info.parse_info()));
-    CHECK(Compiler::EnsureDeoptimizationSupport(&info));
 
     Pipeline pipeline(&info);
     Handle<Code> code = pipeline.GenerateCode();