Revert "Skip the CallFunctionStub when the callee function can be statically determined."

This reverts commit 9845dfad (r25042) for failing tests.

TBR=titzer@chromium.org
BUG=

Review URL: https://codereview.chromium.org/693103004

Cr-Commit-Position: refs/heads/master@{#25044}
git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@25044 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

src/compiler/arm/linkage-arm.cc

@@ -35,9 +35,8 @@ struct ArmLinkageHelperTraits {
 
 typedef LinkageHelper<ArmLinkageHelperTraits> LH;
 
-CallDescriptor* Linkage::GetJSCallDescriptor(int parameter_count, Zone* zone,
-                                             CallDescriptor::Flags flags) {
-  return LH::GetJSCallDescriptor(zone, parameter_count, flags);
+CallDescriptor* Linkage::GetJSCallDescriptor(int parameter_count, Zone* zone) {
+  return LH::GetJSCallDescriptor(zone, parameter_count);
 }
 
 

src/compiler/arm64/linkage-arm64.cc

@@ -35,9 +35,8 @@ struct Arm64LinkageHelperTraits {
 
 typedef LinkageHelper<Arm64LinkageHelperTraits> LH;
 
-CallDescriptor* Linkage::GetJSCallDescriptor(int parameter_count, Zone* zone,
-                                             CallDescriptor::Flags flags) {
-  return LH::GetJSCallDescriptor(zone, parameter_count, flags);
+CallDescriptor* Linkage::GetJSCallDescriptor(int parameter_count, Zone* zone) {
+  return LH::GetJSCallDescriptor(zone, parameter_count);
 }
 
 

src/compiler/ia32/linkage-ia32.cc

@@ -30,9 +30,8 @@ struct IA32LinkageHelperTraits {
 
 typedef LinkageHelper<IA32LinkageHelperTraits> LH;
 
-CallDescriptor* Linkage::GetJSCallDescriptor(int parameter_count, Zone* zone,
-                                             CallDescriptor::Flags flags) {
-  return LH::GetJSCallDescriptor(zone, parameter_count, flags);
+CallDescriptor* Linkage::GetJSCallDescriptor(int parameter_count, Zone* zone) {
+  return LH::GetJSCallDescriptor(zone, parameter_count);
 }
 
 

src/compiler/js-generic-lowering.cc

@@ -9,7 +9,6 @@
 #include "src/compiler/js-generic-lowering.h"
 #include "src/compiler/machine-operator.h"
 #include "src/compiler/node-aux-data-inl.h"
-#include "src/compiler/node-matchers.h"
 #include "src/compiler/node-properties-inl.h"
 #include "src/unique.h"
 
@@ -406,47 +405,15 @@ void JSGenericLowering::LowerJSCallConstruct(Node* node) {
 }
 
 
-bool JSGenericLowering::TryLowerDirectJSCall(Node* node) {
-  // Lower to a direct call to a constant JSFunction if the arity matches.
-  const CallFunctionParameters& p = CallFunctionParametersOf(node->op());
-  int arg_count = static_cast<int>(p.arity() - 2);
-  HeapObjectMatcher<JSFunction> func(node->InputAt(0));
-  if (!func.HasValue()) return false;
-
-  Handle<JSFunction> function = func.Value().handle();
-  if (arg_count != function->shared()->formal_parameter_count()) return false;
-
-  int index = NodeProperties::FirstContextIndex(node);
-
-  // TODO(titzer): total hack to share function context constants.
-  // Remove this when the JSGraph canonicalizes heap constants.
-  Node* context = node->InputAt(index);
-  HeapObjectMatcher<Context> context_const(context);
-  if (!context_const.HasValue() ||
-      *(context_const.Value().handle()) != function->context()) {
-    context = jsgraph()->HeapConstant(Handle<Context>(function->context()));
-  }
-  node->ReplaceInput(index, context);
-  CallDescriptor* desc = linkage()->GetJSCallDescriptor(
-      1 + arg_count, jsgraph()->zone(), FlagsForNode(node));
-  PatchOperator(node, common()->Call(desc));
-  return true;
-}
-
-
 void JSGenericLowering::LowerJSCallFunction(Node* node) {
-  if (!TryLowerDirectJSCall(node)) {
-    // Call to computed function; use CallFunctionStub;
   const CallFunctionParameters& p = CallFunctionParametersOf(node->op());
-    int arg_count = static_cast<int>(p.arity() - 2);
-    CallFunctionStub stub(isolate(), arg_count, p.flags());
+  CallFunctionStub stub(isolate(), static_cast<int>(p.arity() - 2), p.flags());
   CallInterfaceDescriptor d = stub.GetCallInterfaceDescriptor();
   CallDescriptor* desc = linkage()->GetStubCallDescriptor(
       d, static_cast<int>(p.arity() - 1), FlagsForNode(node));
   Node* stub_code = CodeConstant(stub.GetCode());
   PatchInsertInput(node, 0, stub_code);
   PatchOperator(node, common()->Call(desc));
-  }
 }
 
 

src/compiler/js-generic-lowering.h

@@ -66,8 +66,6 @@ class JSGenericLowering : public Reducer {
   CompilationInfo* info_;
   JSGraph* jsgraph_;
   Linkage* linkage_;
-
-  bool TryLowerDirectJSCall(Node* node);
 };
 
 }  // namespace compiler

src/compiler/linkage-impl.h

@@ -28,8 +28,8 @@ class LinkageHelper {
   }
 
   // TODO(turbofan): cache call descriptors for JSFunction calls.
-  static CallDescriptor* GetJSCallDescriptor(Zone* zone, int js_parameter_count,
-                                             CallDescriptor::Flags flags) {
+  static CallDescriptor* GetJSCallDescriptor(Zone* zone,
+                                             int js_parameter_count) {
     const size_t return_count = 1;
     const size_t context_count = 1;
     const size_t parameter_count = js_parameter_count + context_count;
@@ -56,8 +56,7 @@ class LinkageHelper {
     // The target for JS function calls is the JSFunction object.
     MachineType target_type = kMachAnyTagged;
     LinkageLocation target_loc = regloc(LinkageTraits::JSCallFunctionReg());
-    return new (zone) CallDescriptor(     // --
-        CallDescriptor::kCallJSFunction,  // kind
+    return new (zone) CallDescriptor(CallDescriptor::kCallJSFunction,  // kind
                                      target_type,         // target MachineType
                                      target_loc,          // target location
                                      types.Build(),       // machine_sig
@@ -65,7 +64,7 @@ class LinkageHelper {
                                      js_parameter_count,  // js_parameter_count
                                      Operator::kNoProperties,  // properties
                                      kNoCalleeSaved,           // callee-saved
-        flags,                            // flags
+                                     CallDescriptor::kNeedsFrameState,  // flags
                                      "js-call");
   }
 
@@ -117,8 +116,7 @@ class LinkageHelper {
     // The target for runtime calls is a code object.
     MachineType target_type = kMachAnyTagged;
     LinkageLocation target_loc = LinkageLocation::AnyRegister();
-    return new (zone) CallDescriptor(     // --
-        CallDescriptor::kCallCodeObject,  // kind
+    return new (zone) CallDescriptor(CallDescriptor::kCallCodeObject,  // kind
                                      target_type,         // target MachineType
                                      target_loc,          // target location
                                      types.Build(),       // machine_sig
@@ -171,8 +169,7 @@ class LinkageHelper {
     // The target for stub calls is a code object.
     MachineType target_type = kMachAnyTagged;
     LinkageLocation target_loc = LinkageLocation::AnyRegister();
-    return new (zone) CallDescriptor(     // --
-        CallDescriptor::kCallCodeObject,  // kind
+    return new (zone) CallDescriptor(CallDescriptor::kCallCodeObject,  // kind
                                      target_type,         // target MachineType
                                      target_loc,          // target location
                                      types.Build(),       // machine_sig
@@ -204,16 +201,15 @@ class LinkageHelper {
     // The target for C calls is always an address (i.e. machine pointer).
     MachineType target_type = kMachPtr;
     LinkageLocation target_loc = LinkageLocation::AnyRegister();
-    return new (zone) CallDescriptor(  // --
-        CallDescriptor::kCallAddress,  // kind
+    return new (zone) CallDescriptor(CallDescriptor::kCallAddress,  // kind
                                      target_type,        // target MachineType
                                      target_loc,         // target location
                                      msig,               // machine_sig
                                      locations.Build(),  // location_sig
                                      0,                  // js_parameter_count
                                      Operator::kNoProperties,  // properties
-        LinkageTraits::CCalleeSaveRegisters(), CallDescriptor::kNoFlags,
-        "c-call");
+                                     LinkageTraits::CCalleeSaveRegisters(),
+                                     CallDescriptor::kNoFlags, "c-call");
   }
 
   static LinkageLocation regloc(Register reg) {

src/compiler/linkage.cc

@@ -42,15 +42,13 @@ CallDescriptor* Linkage::ComputeIncoming(Zone* zone, CompilationInfo* info) {
   if (info->function() != NULL) {
     // If we already have the function literal, use the number of parameters
     // plus the receiver.
-    return GetJSCallDescriptor(1 + info->function()->parameter_count(), zone,
-                               CallDescriptor::kNoFlags);
+    return GetJSCallDescriptor(1 + info->function()->parameter_count(), zone);
   }
   if (!info->closure().is_null()) {
     // If we are compiling a JS function, use a JS call descriptor,
     // plus the receiver.
     SharedFunctionInfo* shared = info->closure()->shared();
-    return GetJSCallDescriptor(1 + shared->formal_parameter_count(), zone,
-                               CallDescriptor::kNoFlags);
+    return GetJSCallDescriptor(1 + shared->formal_parameter_count(), zone);
   }
   if (info->code_stub() != NULL) {
     // Use the code stub interface descriptor.
@@ -90,9 +88,8 @@ FrameOffset Linkage::GetFrameOffset(int spill_slot, Frame* frame,
 }
 
 
-CallDescriptor* Linkage::GetJSCallDescriptor(
-    int parameter_count, CallDescriptor::Flags flags) const {
-  return GetJSCallDescriptor(parameter_count, zone_, flags);
+CallDescriptor* Linkage::GetJSCallDescriptor(int parameter_count) const {
+  return GetJSCallDescriptor(parameter_count, zone_);
 }
 
 

src/compiler/linkage.h

@@ -174,10 +174,8 @@ class Linkage : public ZoneObject {
   // The call descriptor for this compilation unit describes the locations
   // of incoming parameters and the outgoing return value(s).
   CallDescriptor* GetIncomingDescriptor() const { return incoming_; }
-  CallDescriptor* GetJSCallDescriptor(int parameter_count,
-                                      CallDescriptor::Flags flags) const;
-  static CallDescriptor* GetJSCallDescriptor(int parameter_count, Zone* zone,
-                                             CallDescriptor::Flags flags);
+  CallDescriptor* GetJSCallDescriptor(int parameter_count) const;
+  static CallDescriptor* GetJSCallDescriptor(int parameter_count, Zone* zone);
   CallDescriptor* GetRuntimeCallDescriptor(
       Runtime::FunctionId function, int parameter_count,
       Operator::Properties properties) const;

src/compiler/mips/linkage-mips.cc

@@ -35,9 +35,8 @@ struct MipsLinkageHelperTraits {
 
 typedef LinkageHelper<MipsLinkageHelperTraits> LH;
 
-CallDescriptor* Linkage::GetJSCallDescriptor(int parameter_count, Zone* zone,
-                                             CallDescriptor::Flags flags) {
-  return LH::GetJSCallDescriptor(zone, parameter_count, flags);
+CallDescriptor* Linkage::GetJSCallDescriptor(int parameter_count, Zone* zone) {
+  return LH::GetJSCallDescriptor(zone, parameter_count);
 }
 
 

src/compiler/raw-machine-assembler.cc

@@ -99,8 +99,7 @@ Node* RawMachineAssembler::CallFunctionStub0(Node* function, Node* receiver,
 
 Node* RawMachineAssembler::CallJS0(Node* function, Node* receiver,
                                    Node* context, Node* frame_state) {
-  CallDescriptor* descriptor =
-      Linkage::GetJSCallDescriptor(1, zone(), CallDescriptor::kNeedsFrameState);
+  CallDescriptor* descriptor = Linkage::GetJSCallDescriptor(1, zone());
   Node* call = graph()->NewNode(common()->Call(descriptor), function, receiver,
                                 context, frame_state);
   schedule()->AddNode(CurrentBlock(), call);

src/compiler/x64/linkage-x64.cc

@@ -49,9 +49,8 @@ struct X64LinkageHelperTraits {
 
 typedef LinkageHelper<X64LinkageHelperTraits> LH;
 
-CallDescriptor* Linkage::GetJSCallDescriptor(int parameter_count, Zone* zone,
-                                             CallDescriptor::Flags flags) {
-  return LH::GetJSCallDescriptor(zone, parameter_count, flags);
+CallDescriptor* Linkage::GetJSCallDescriptor(int parameter_count, Zone* zone) {
+  return LH::GetJSCallDescriptor(zone, parameter_count);
 }
 
 

test/cctest/compiler/test-linkage.cc

@@ -90,8 +90,7 @@ TEST(TestLinkageJSCall) {
   Linkage linkage(info.zone(), &info);
 
   for (int i = 0; i < 32; i++) {
-    CallDescriptor* descriptor =
-        linkage.GetJSCallDescriptor(i, CallDescriptor::kNoFlags);
+    CallDescriptor* descriptor = linkage.GetJSCallDescriptor(i);
     CHECK_NE(NULL, descriptor);
     CHECK_EQ(i, descriptor->JSParameterCount());
     CHECK_EQ(1, descriptor->ReturnCount());