[turbofan] Avoid obsolete steps in FunctionTester.

test/cctest/compiler/function-tester.h

 // Copyright 2014 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef V8_CCTEST_COMPILER_FUNCTION_TESTER_H_
 #define V8_CCTEST_COMPILER_FUNCTION_TESTER_H_
 
 #include "src/ast/ast-numbering.h"
 #include "src/ast/scopes.h"
 #include "src/compiler.h"
@@ skipping 172 matching lines @@
     CHECK(Parser::ParseStatic(info.parse_info()));
     info.SetOptimizing();
     if (flags_ & CompilationInfo::kFunctionContextSpecializing) {
       info.MarkAsFunctionContextSpecializing();
     }
     if (flags_ & CompilationInfo::kInliningEnabled) {
       info.MarkAsInliningEnabled();
     }
     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();
     CHECK(!code.is_null());
     info.dependencies()->Commit(code);
     info.context()->native_context()->AddOptimizedCode(*code);
     function->ReplaceCode(*code);
     return function;
   }
 
@@ skipping 17 matching lines @@
 
   // Compile the given machine graph instead of the source of the function
   // and replace the JSFunction's code with the result.
   Handle<JSFunction> CompileGraph(Graph* graph) {
     Zone zone(function->GetIsolate()->allocator());
     ParseInfo parse_info(&zone, function);
     CompilationInfo info(&parse_info, function);
 
     CHECK(Parser::ParseStatic(info.parse_info()));
     info.SetOptimizing();
-    CHECK(Compiler::Analyze(info.parse_info()));
-    CHECK(Compiler::EnsureDeoptimizationSupport(&info));
 
     Handle<Code> code = Pipeline::GenerateCodeForTesting(&info, graph);
     CHECK(!code.is_null());
     function->ReplaceCode(*code);
     return function;
   }
 };
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_CCTEST_COMPILER_FUNCTION_TESTER_H_