Revert "[csa] Fix semantics of PopAndReturn"

This reverts commit 5e5eaf79.

Reason for revert: Failure on V8 Linux gcc https://ci.chromium.org/p/v8/builders/ci/V8%20Linux%20gcc/8929?

Original change's description:
> [csa] Fix semantics of PopAndReturn
>
> This CL prohibits using PopAndReturn from the builtins that
> have calling convention with arguments on the stack.
>
> This CL also updates the PopAndReturn tests so that even off-by-one
> errors in the number of poped arguments are caught which was not the
> case before.
>
> Motivation:
>
> PopAndReturn is supposed to be using ONLY in CSA/Torque builtins for
> dropping ALL JS arguments that are currently located on the stack.
> Disallowing PopAndReturn in builtins with stack arguments simplifies
> semantics of this instruction because in case of presence of declared
> stack parameters it's impossible to distinguish the following cases:
> 1) stack parameter is included in JS arguments (and therefore it will
>    be dropped as a part of 'pop' number of arguments),
> 2) stack parameter is NOT included in JS arguments (and therefore it
>    should be dropped in ADDITION to the 'pop' number of arguments).
>
> This issue wasn't noticed before because builtins with stack parameters
> relied on adapter frames machinery to ensure that the expected
> parameters are present on the stack, but on the same time the adapter
> frame tearing down code was effectively recovering the stack pointer
> potentially broken by the CSA builtin.
>
> Once we get rid of the arguments adapter frames keeping stack pointer
> in a valid state becomes crucial.
>
> Bug: v8:5269, v8:10201
> Change-Id: Id3ea9730bb0d41d17999c73136c4dfada374a822
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2460819
> Commit-Queue: Igor Sheludko <ishell@chromium.org>
> Reviewed-by: Tobias Tebbi <tebbi@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#70454}

TBR=tebbi@chromium.org,ishell@chromium.org

Change-Id: I2673982a8f51cbecf421af11b0ce5ad5031fb406
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: v8:5269
Bug: v8:10201
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2465656Reviewed-by: Zhi An Ng <zhin@chromium.org>
Commit-Queue: Zhi An Ng <zhin@chromium.org>
Cr-Commit-Position: refs/heads/master@{#70458}

src/codegen/code-stub-assembler.cc

@@ -10434,20 +10434,14 @@ TNode<TIndex> CodeStubAssembler::BuildFastLoop(const VariableList& vars,
 }
 
 // Instantiate BuildFastLoop for IntPtrT and UintPtrT.
-template V8_EXPORT_PRIVATE TNode<IntPtrT>
-CodeStubAssembler::BuildFastLoop<IntPtrT>(const VariableList& vars,
-                                          TNode<IntPtrT> start_index,
-                                          TNode<IntPtrT> end_index,
-                                          const FastLoopBody<IntPtrT>& body,
-                                          int increment,
-                                          IndexAdvanceMode advance_mode);
-template V8_EXPORT_PRIVATE TNode<UintPtrT>
-CodeStubAssembler::BuildFastLoop<UintPtrT>(const VariableList& vars,
-                                           TNode<UintPtrT> start_index,
-                                           TNode<UintPtrT> end_index,
-                                           const FastLoopBody<UintPtrT>& body,
-                                           int increment,
+template TNode<IntPtrT> CodeStubAssembler::BuildFastLoop<IntPtrT>(
+    const VariableList& vars, TNode<IntPtrT> start_index,
+    TNode<IntPtrT> end_index, const FastLoopBody<IntPtrT>& body, int increment,
     IndexAdvanceMode advance_mode);
+template TNode<UintPtrT> CodeStubAssembler::BuildFastLoop<UintPtrT>(
+    const VariableList& vars, TNode<UintPtrT> start_index,
+    TNode<UintPtrT> end_index, const FastLoopBody<UintPtrT>& body,
+    int increment, IndexAdvanceMode advance_mode);
 
 template <typename TIndex>
 void CodeStubAssembler::BuildFastArrayForEach(

src/compiler/raw-machine-assembler.cc

@@ -632,21 +632,6 @@ void RawMachineAssembler::Return(int count, Node* vs[]) {
 }
 
 void RawMachineAssembler::PopAndReturn(Node* pop, Node* value) {
-  // PopAndReturn is supposed to be using ONLY in CSA/Torque builtins for
-  // dropping ALL JS arguments that are currently located on the stack.
-  // The check below ensures that there are no directly accessible stack
-  // parameters from current builtin, which implies that the builtin with
-  // JS calling convention (TFJ) was created with kDontAdaptArgumentsSentinel.
-  // This simplifies semantics of this instruction because in case of presence
-  // of directly accessible stack parameters it's impossible to distinguish
-  // the following cases:
-  // 1) stack parameter is included in JS arguments (and therefore it will be
-  //    dropped as a part of 'pop' number of arguments),
-  // 2) stack parameter is NOT included in JS arguments (and therefore it should
-  //    be dropped in ADDITION to the 'pop' number of arguments).
-  // Additionally, in order to simplify assembly code, PopAndReturn is also
-  // not allowed in builtins with stub linkage and parameters on stack.
-  CHECK_EQ(call_descriptor()->StackParameterCount(), 0);
   Node* values[] = {pop, value};
   Node* ret = MakeNode(common()->Return(1), 2, values);
   schedule()->AddReturn(CurrentBlock(), ret);

src/diagnostics/objects-printer.cc

@@ -13,7 +13,6 @@
 #include "src/interpreter/bytecodes.h"
 #include "src/objects/arguments-inl.h"
 #include "src/objects/cell-inl.h"
-#include "src/objects/code-kind.h"
 #include "src/objects/data-handler-inl.h"
 #include "src/objects/debug-objects-inl.h"
 #include "src/objects/embedder-data-array-inl.h"
@@ -1290,10 +1289,7 @@ void JSFunction::JSFunctionPrint(std::ostream& os) {  // NOLINT
   os << "\n - kind: " << shared().kind();
   os << "\n - context: " << Brief(context());
   os << "\n - code: " << Brief(code());
-  if (code().kind() == CodeKind::DEOPT_ENTRIES_OR_FOR_TESTING) {
-    os << "\n - FunctionTester function";
-
-  } else if (ActiveTierIsIgnition()) {
+  if (ActiveTierIsIgnition()) {
     os << "\n - interpreted";
     if (shared().HasBytecodeArray()) {
       os << "\n - bytecode: " << shared().GetBytecodeArray();

test/cctest/cctest.status

@@ -116,10 +116,6 @@
   # https://crbug.com/v8/8919
   'test-platform/StackAlignment': [PASS, ['not is_clang', SKIP]],
 
-  # Test that misuse of PopAndReturn does not compile.
-  'test-code-stub-assembler/PopAndReturnFromJSBuiltinWithStackParameters' : [FAIL],
-  'test-code-stub-assembler/PopAndReturnFromTFCBuiltinWithStackParameters' : [FAIL],
-
   ############################################################################
   # Slow tests.
   'test-debug/CallFunctionInDebugger': [PASS, ['mode == debug', SLOW]],

test/cctest/compiler/code-assembler-tester.h

@@ -18,18 +18,13 @@ namespace compiler {
 
 class CodeAssemblerTester {
  public:
-  CodeAssemblerTester(Isolate* isolate,
-                      const CallInterfaceDescriptor& descriptor,
-                      const char* name = "test")
+  // Test generating code for a stub. Assumes VoidDescriptor call interface.
+  explicit CodeAssemblerTester(Isolate* isolate, const char* name = "test")
       : zone_(isolate->allocator(), ZONE_NAME, kCompressGraphZone),
         scope_(isolate),
-        state_(isolate, &zone_, descriptor,
+        state_(isolate, &zone_, VoidDescriptor{},
                CodeKind::DEOPT_ENTRIES_OR_FOR_TESTING, name,
-               PoisoningMitigationLevel::kDontPoison, Builtins::kNoBuiltinId) {}
-
-  // Test generating code for a stub. Assumes VoidDescriptor call interface.
-  explicit CodeAssemblerTester(Isolate* isolate, const char* name = "test")
-      : CodeAssemblerTester(isolate, VoidDescriptor{}, name) {}
+               PoisoningMitigationLevel::kDontPoison) {}
 
   // Test generating code for a JS function (e.g. builtins).
   CodeAssemblerTester(Isolate* isolate, int parameter_count,
@@ -42,7 +37,10 @@ class CodeAssemblerTester {
 
   CodeAssemblerTester(Isolate* isolate, CodeKind kind,
                       const char* name = "test")
-      : CodeAssemblerTester(isolate, 0, kind, name) {}
+      : zone_(isolate->allocator(), ZONE_NAME, kCompressGraphZone),
+        scope_(isolate),
+        state_(isolate, &zone_, 0, kind, name,
+               PoisoningMitigationLevel::kDontPoison) {}
 
   CodeAssemblerTester(Isolate* isolate, CallDescriptor* call_descriptor,
                       const char* name = "test")

test/cctest/test-code-stub-assembler.cc

@@ -1930,192 +1930,63 @@ TEST(AllocateNameDictionary) {
   }
 }
 
-TEST(PopAndReturnFromJSBuiltinWithStackParameters) {
+TEST(PopAndReturnConstant) {
   Isolate* isolate(CcTest::InitIsolateOnce());
 
-  const int kNumStackParams = 1;
-  CodeAssemblerTester asm_tester(isolate, kNumStackParams);
-  {
+  const int kNumParams = 4;
+  const int kNumProgrammaticParams = 2;
+  CodeAssemblerTester asm_tester(
+      isolate,
+      kNumParams - kNumProgrammaticParams + 1);  // Include receiver.
   CodeStubAssembler m(asm_tester.state());
-    m.PopAndReturn(m.SmiUntag(m.Parameter<Smi>(0)),
-                   m.SmiConstant(Smi::FromInt(1234)));
-  }
 
-  // Attempt to generate code must trigger CHECK failure in RawMachineAssebler.
-  // PopAndReturn is not allowed in builtins with JS linkage and declared stack
-  // parameters.
-  asm_tester.GenerateCode();
-}
-
-TEST(PopAndReturnFromTFCBuiltinWithStackParameters) {
-  Isolate* isolate(CcTest::InitIsolateOnce());
-
-  // Setup CSA for creating TFC-style builtin with stack arguments.
-  // For the testing purposes we need any interface descriptor that has at
-  // least one argument passed on stack.
-  using Descriptor = FlatMapIntoArrayDescriptor;
-  Descriptor descriptor;
-  CHECK_LT(0, descriptor.GetStackParameterCount());
-
-  CodeAssemblerTester asm_tester(isolate, Descriptor());
-  {
-    CodeStubAssembler m(asm_tester.state());
-    m.PopAndReturn(m.SmiUntag(m.Parameter<Smi>(0)),
+  // Call a function that return |kNumProgramaticParams| parameters in addition
+  // to those specified by the static descriptor. |kNumProgramaticParams| is
+  // specified as a constant.
+  CSA_CHECK(&m, m.SmiEqual(m.Parameter<Smi>(2), m.SmiConstant(5678)));
+  m.PopAndReturn(m.Int32Constant(kNumProgrammaticParams),
                  m.SmiConstant(Smi::FromInt(1234)));
-  }
-
-  // Attempt to generate code must trigger CHECK failure in RawMachineAssebler.
-  // PopAndReturn is not allowed in builtins with JS linkage and declared stack
-  // parameters.
-  asm_tester.GenerateCode();
-}
-
-namespace {
-
-DISABLE_ASAN void* GetStackPointer() {
-  // Disable ASAN, because it mallocs stack memory and therefore the result
-  // will not approximate stack pointer value.
-  intptr_t local = 0;
-  // Return value via p in order to avoid triggering clang warning:
-  // Address of stack memory associated with local variable 'local' returned
-  // clang(-Wreturn-stack-address).
-  void* p = &local;
-  return p;
-}
-
-TNode<Object> MakeConstantNode(CodeStubAssembler& m, Handle<Object> value) {
-  if (value->IsSmi()) {
-    return m.SmiConstant(Smi::ToInt(*value));
-  }
-  return m.HeapConstant(Handle<HeapObject>::cast(value));
-}
-
-// Buids a CSA function that calls |target| function with given arguments
-// |number_of_iterations| times and checks that the stack pointer values before
-// the calls and after the calls are the same.
-// Then this new function is called multiple times.
-template <typename... Args>
-void CallFunctionWithStackPointerChecks(Isolate* isolate,
-                                        Handle<Object> expected_result,
-                                        Handle<Object> target,
-                                        Handle<Object> receiver, Args... args) {
-  // Setup CSA for creating TFJ-style builtin.
-  using Descriptor = JSTrampolineDescriptor;
-  CodeAssemblerTester asm_tester(isolate, Descriptor());
-
-  {
-    CodeStubAssembler m(asm_tester.state());
-
-    const TNode<ExternalReference> get_stack_ptr = m.ExternalConstant(
-        ExternalReference::Create(reinterpret_cast<Address>(GetStackPointer)));
-
-    TNode<Context> context = m.Parameter<Context>(Descriptor::kContext);
-
-    // CSA doesn't have instructions for reading current stack pointer value,
-    // so we use a C function that returns address of its local variable.
-    // This is a good-enough approximation for the stack pointer.
-    MachineType type_intptr = MachineType::IntPtr();
-    TNode<WordT> stack_pointer0 =
-        m.UncheckedCast<WordT>(m.CallCFunction(get_stack_ptr, type_intptr));
-
-    // CSA::CallCFunction() aligns stack pointer before the call, so off-by one
-    // errors will not be detected. In order to handle this we do the calls in a
-    // loop in order to exaggerate the effect of potentially broken stack
-    // pointer so that the GetStackPointer function will be able to notice it.
-    m.BuildFastLoop<IntPtrT>(
-        m.IntPtrConstant(0), m.IntPtrConstant(153),
-        [&](TNode<IntPtrT> index) {
-          TNode<Object> result = m.Call(context, MakeConstantNode(m, target),
-                                        MakeConstantNode(m, receiver),
-                                        MakeConstantNode(m, args)...);
-          CSA_CHECK(
-              &m, m.TaggedEqual(result, MakeConstantNode(m, expected_result)));
-        },
-        1, CodeStubAssembler::IndexAdvanceMode::kPost);
-
-    TNode<WordT> stack_pointer1 =
-        m.UncheckedCast<WordT>(m.CallCFunction(get_stack_ptr, type_intptr));
-    CSA_CHECK(&m, m.WordEqual(stack_pointer0, stack_pointer1));
-    m.Return(m.SmiConstant(42));
-  }
-  FunctionTester ft(asm_tester.GenerateCode(), 1);  // Include receiver.
 
+  FunctionTester ft(asm_tester.GenerateCode(), kNumParams);
   Handle<Object> result;
   for (int test_count = 0; test_count < 100; ++test_count) {
-    result = ft.Call().ToHandleChecked();
-    CHECK_EQ(Smi::FromInt(42), *result);
+    result = ft.Call(isolate->factory()->undefined_value(),
+                     Handle<Smi>(Smi::FromInt(5678), isolate),
+                     isolate->factory()->undefined_value(),
+                     isolate->factory()->undefined_value())
+                 .ToHandleChecked();
+    CHECK_EQ(1234, Handle<Smi>::cast(result)->value());
   }
 }
 
-}  // namespace
-
-TEST(PopAndReturnConstant) {
-  Isolate* isolate(CcTest::InitIsolateOnce());
-
-  // Setup CSA for creating TFJ-style builtin.
-  using Descriptor = JSTrampolineDescriptor;
-  CodeAssemblerTester asm_tester(isolate, Descriptor());
-
-  const int kNumParams = 4;  // Not including receiver
-  {
-    CodeStubAssembler m(asm_tester.state());
-    TNode<Int32T> argc =
-        m.UncheckedParameter<Int32T>(Descriptor::kActualArgumentsCount);
-    CSA_CHECK(&m, m.Word32Equal(argc, m.Int32Constant(kNumParams)));
-
-    m.PopAndReturn(m.IntPtrConstant(kNumParams + 1),  // Include receiver.
-                   m.SmiConstant(1234));
-  }
-
-  FunctionTester ft(asm_tester.GenerateCode(), 0);
-  ft.function->shared().DontAdaptArguments();
-
-  // Now call this function multiple time also checking that the stack pointer
-  // didn't change after the calls.
-  Handle<Object> receiver = isolate->factory()->undefined_value();
-  Handle<Smi> expected_result(Smi::FromInt(1234), isolate);
-  CallFunctionWithStackPointerChecks(isolate, expected_result, ft.function,
-                                     receiver,
-                                     // Pass kNumParams arguments.
-                                     Handle<Smi>(Smi::FromInt(1), isolate),
-                                     Handle<Smi>(Smi::FromInt(2), isolate),
-                                     Handle<Smi>(Smi::FromInt(3), isolate),
-                                     Handle<Smi>(Smi::FromInt(4), isolate));
-}
-
 TEST(PopAndReturnVariable) {
   Isolate* isolate(CcTest::InitIsolateOnce());
 
-  // Setup CSA for creating TFJ-style builtin.
-  using Descriptor = JSTrampolineDescriptor;
-  CodeAssemblerTester asm_tester(isolate, Descriptor());
+  const int kNumParams = 4;
+  const int kNumProgrammaticParams = 2;
+  CodeAssemblerTester asm_tester(
+      isolate,
+      kNumParams - kNumProgrammaticParams + 1);  // Include receiver.
+  CodeStubAssembler m(asm_tester.state());
+
+  // Call a function that return |kNumProgramaticParams| parameters in addition
+  // to those specified by the static descriptor. |kNumProgramaticParams| is
+  // passed in as a parameter to the function so that it can't be recognized as
+  // a constant.
+  CSA_CHECK(&m, m.SmiEqual(m.Parameter<Smi>(2), m.SmiConstant(5678)));
+  m.PopAndReturn(m.SmiUntag(m.Parameter<Smi>(1)),
+                 m.SmiConstant(Smi::FromInt(1234)));
 
-  const int kNumParams = 4;  // Not including receiver
-  {
-    CodeStubAssembler m(asm_tester.state());
-    TNode<Int32T> argc =
-        m.UncheckedParameter<Int32T>(Descriptor::kActualArgumentsCount);
-    CSA_CHECK(&m, m.Word32Equal(argc, m.Int32Constant(kNumParams)));
-
-    TNode<Int32T> argc_with_receiver = m.Int32Add(argc, m.Int32Constant(1));
-    m.PopAndReturn(m.ChangeInt32ToIntPtr(argc_with_receiver),
-                   m.SmiConstant(1234));
-  }
-
-  FunctionTester ft(asm_tester.GenerateCode(), 0);
-  ft.function->shared().DontAdaptArguments();
-
-  // Now call this function multiple time also checking that the stack pointer
-  // didn't change after the calls.
-  Handle<Object> receiver = isolate->factory()->undefined_value();
-  Handle<Smi> expected_result(Smi::FromInt(1234), isolate);
-  CallFunctionWithStackPointerChecks(isolate, expected_result, ft.function,
-                                     receiver,
-                                     // Pass kNumParams arguments.
-                                     Handle<Smi>(Smi::FromInt(1), isolate),
-                                     Handle<Smi>(Smi::FromInt(2), isolate),
-                                     Handle<Smi>(Smi::FromInt(3), isolate),
-                                     Handle<Smi>(Smi::FromInt(4), isolate));
+  FunctionTester ft(asm_tester.GenerateCode(), kNumParams);
+  Handle<Object> result;
+  for (int test_count = 0; test_count < 100; ++test_count) {
+    result = ft.Call(Handle<Smi>(Smi::FromInt(kNumProgrammaticParams), isolate),
+                     Handle<Smi>(Smi::FromInt(5678), isolate),
+                     isolate->factory()->undefined_value(),
+                     isolate->factory()->undefined_value())
+                 .ToHandleChecked();
+    CHECK_EQ(1234, Handle<Smi>::cast(result)->value());
+  }
 }
 
 TEST(OneToTwoByteStringCopy) {
@@ -2253,67 +2124,36 @@ TEST(TwoToTwoByteStringCopy) {
 TEST(Arguments) {
   Isolate* isolate(CcTest::InitIsolateOnce());
 
-  // Setup CSA for creating TFJ-style builtin.
-  using Descriptor = JSTrampolineDescriptor;
-  CodeAssemblerTester asm_tester(isolate, Descriptor());
-
-  {
+  const int kNumParams = 3;
+  CodeAssemblerTester asm_tester(isolate, kNumParams + 1);  // Include receiver.
   CodeStubAssembler m(asm_tester.state());
-    TNode<Int32T> argc =
-        m.UncheckedParameter<Int32T>(Descriptor::kActualArgumentsCount);
-    CodeStubArguments arguments(&m, argc);
 
-    CSA_CHECK(&m, m.TaggedEqual(arguments.AtIndex(0), m.SmiConstant(12)));
-    CSA_CHECK(&m, m.TaggedEqual(arguments.AtIndex(1), m.SmiConstant(13)));
-    CSA_CHECK(&m, m.TaggedEqual(arguments.AtIndex(2), m.SmiConstant(14)));
+  CodeStubArguments arguments(&m, m.IntPtrConstant(3));
 
-    arguments.PopAndReturn(arguments.GetReceiver());
-  }
+  CSA_ASSERT(&m, m.TaggedEqual(arguments.AtIndex(0), m.SmiConstant(12)));
+  CSA_ASSERT(&m, m.TaggedEqual(arguments.AtIndex(1), m.SmiConstant(13)));
+  CSA_ASSERT(&m, m.TaggedEqual(arguments.AtIndex(2), m.SmiConstant(14)));
 
-  FunctionTester ft(asm_tester.GenerateCode(), 0);
-  ft.function->shared().DontAdaptArguments();
+  arguments.PopAndReturn(arguments.GetReceiver());
 
-  Handle<Object> result;
-  result = ft.Call(Handle<Smi>(Smi::FromInt(12), isolate),
+  FunctionTester ft(asm_tester.GenerateCode(), kNumParams);
+  Handle<Object> result = ft.Call(Handle<Smi>(Smi::FromInt(12), isolate),
                                   Handle<Smi>(Smi::FromInt(13), isolate),
                                   Handle<Smi>(Smi::FromInt(14), isolate))
                               .ToHandleChecked();
   // When calling with undefined object as the receiver, the CallFunction
   // builtin swaps it to the global proxy object.
   CHECK_EQ(*isolate->global_proxy(), *result);
-
-  result = ft.Call(Handle<Smi>(Smi::FromInt(12), isolate),
-                   Handle<Smi>(Smi::FromInt(13), isolate),
-                   Handle<Smi>(Smi::FromInt(14), isolate),
-                   Handle<Smi>(Smi::FromInt(15), isolate))
-               .ToHandleChecked();
-  CHECK_EQ(*isolate->global_proxy(), *result);
-
-  result = ft.Call(Handle<Smi>(Smi::FromInt(12), isolate),
-                   Handle<Smi>(Smi::FromInt(13), isolate),
-                   Handle<Smi>(Smi::FromInt(14), isolate),
-                   Handle<Smi>(Smi::FromInt(15), isolate),
-                   Handle<Smi>(Smi::FromInt(16), isolate),
-                   Handle<Smi>(Smi::FromInt(17), isolate),
-                   Handle<Smi>(Smi::FromInt(18), isolate),
-                   Handle<Smi>(Smi::FromInt(19), isolate))
-               .ToHandleChecked();
-  CHECK_EQ(*isolate->global_proxy(), *result);
 }
 
 TEST(ArgumentsForEach) {
   Isolate* isolate(CcTest::InitIsolateOnce());
 
-  // Setup CSA for creating TFJ-style builtin.
-  using Descriptor = JSTrampolineDescriptor;
-  CodeAssemblerTester asm_tester(isolate, Descriptor());
-
-  {
+  const int kNumParams = 3;
+  CodeAssemblerTester asm_tester(isolate, kNumParams + 1);  // Include receiver.
   CodeStubAssembler m(asm_tester.state());
 
-    TNode<Int32T> argc =
-        m.UncheckedParameter<Int32T>(Descriptor::kActualArgumentsCount);
-    CodeStubArguments arguments(&m, argc);
+  CodeStubArguments arguments(&m, m.IntPtrConstant(3));
 
   TVariable<Smi> sum(&m);
   CodeAssemblerVariableList list({&sum}, m.zone());
@@ -2325,35 +2165,13 @@ TEST(ArgumentsForEach) {
   });
 
   arguments.PopAndReturn(sum.value());
-  }
-
-  FunctionTester ft(asm_tester.GenerateCode(), 0);
-  ft.function->shared().DontAdaptArguments();
 
-  Handle<Object> result;
-  result = ft.Call(Handle<Smi>(Smi::FromInt(12), isolate),
+  FunctionTester ft(asm_tester.GenerateCode(), kNumParams);
+  Handle<Object> result = ft.Call(Handle<Smi>(Smi::FromInt(12), isolate),
                                   Handle<Smi>(Smi::FromInt(13), isolate),
                                   Handle<Smi>(Smi::FromInt(14), isolate))
                               .ToHandleChecked();
   CHECK_EQ(Smi::FromInt(12 + 13 + 14), *result);
-
-  result = ft.Call(Handle<Smi>(Smi::FromInt(12), isolate),
-                   Handle<Smi>(Smi::FromInt(13), isolate),
-                   Handle<Smi>(Smi::FromInt(14), isolate),
-                   Handle<Smi>(Smi::FromInt(15), isolate))
-               .ToHandleChecked();
-  CHECK_EQ(Smi::FromInt(12 + 13 + 14 + 15), *result);
-
-  result = ft.Call(Handle<Smi>(Smi::FromInt(12), isolate),
-                   Handle<Smi>(Smi::FromInt(13), isolate),
-                   Handle<Smi>(Smi::FromInt(14), isolate),
-                   Handle<Smi>(Smi::FromInt(15), isolate),
-                   Handle<Smi>(Smi::FromInt(16), isolate),
-                   Handle<Smi>(Smi::FromInt(17), isolate),
-                   Handle<Smi>(Smi::FromInt(18), isolate),
-                   Handle<Smi>(Smi::FromInt(19), isolate))
-               .ToHandleChecked();
-  CHECK_EQ(Smi::FromInt(12 + 13 + 14 + 15 + 16 + 17 + 18 + 19), *result);
 }
 
 TEST(IsDebugActive) {