VM: More abstract interface for generating stub calls.

runtime/vm/intermediate_language_x64.cc

 // Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "vm/globals.h"  // Needed here to get TARGET_ARCH_X64.
 #if defined(TARGET_ARCH_X64)
 
 #include "vm/intermediate_language.h"
 
 #include "vm/dart_entry.h"
@@ skipping 766 matching lines @@
   // Pass a pointer to the first argument in RAX.
   if (!function().HasOptionalParameters()) {
     __ leaq(RAX, Address(RBP, (kParamEndSlotFromFp +
                                function().NumParameters()) * kWordSize));
   } else {
     __ leaq(RAX, Address(RBP, kFirstLocalSlotFromFp * kWordSize));
   }
   __ LoadImmediate(
       RBX, Immediate(reinterpret_cast<uword>(native_c_function())));
   __ LoadImmediate(R10, Immediate(argc_tag));
-  const ExternalLabel* stub_entry = (is_bootstrap_native() || is_leaf_call) ?
-      &StubCode::CallBootstrapCFunctionLabel() :
-      &StubCode::CallNativeCFunctionLabel();
+  const StubEntry& stub_entry = (is_bootstrap_native() || is_leaf_call) ?
+      *StubCode::CallBootstrapCFunction_entry() :
+      *StubCode::CallNativeCFunction_entry();
   compiler->GenerateCall(token_pos(),
                          stub_entry,
                          RawPcDescriptors::kOther,
                          locs());
   __ popq(result);
 }
 
 
 static bool CanBeImmediateIndex(Value* index, intptr_t cid) {
   if (!index->definition()->IsConstant()) return false;
@@ skipping 860 matching lines @@
     Isolate* isolate = compiler->isolate();
 
     if (Assembler::EmittingComments()) {
       __ Comment("%s slow path allocation of %s",
                  instruction_->DebugName(),
                  String::Handle(cls_.PrettyName()).ToCString());
     }
     __ Bind(entry_label());
     const Code& stub =
         Code::Handle(isolate, StubCode::GetAllocationStubForClass(cls_));
-    const ExternalLabel label(stub.EntryPoint());
+    const StubEntry stub_entry(stub);
 
     LocationSummary* locs = instruction_->locs();
 
     locs->live_registers()->Remove(Location::RegisterLocation(result_));
 
     compiler->SaveLiveRegisters(locs);
     compiler->GenerateCall(Scanner::kNoSourcePos,  // No token position.
-                           &label,
+                           stub_entry,
                            RawPcDescriptors::kOther,
                            locs);
     compiler->AddStubCallTarget(stub);
     __ MoveRegister(result_, RAX);
     compiler->RestoreLiveRegisters(locs);
     __ jmp(exit_label());
   }
 
   static void Allocate(FlowGraphCompiler* compiler,
                        Instruction* instruction,
@@ skipping 431 matching lines @@
                                     2,
                                     locs());
       __ Drop(2);
       __ popq(kResultReg);
       __ Bind(&done);
       return;
     }
   }
 
   __ Bind(&slow_path);
-  const ExternalLabel label(StubCode::AllocateArrayEntryPoint());
   compiler->GenerateCall(token_pos(),
-                         &label,
+                         *StubCode::AllocateArray_entry(),
                          RawPcDescriptors::kOther,
                          locs());
   __ Bind(&done);
   ASSERT(locs()->out(0).reg() == kResultReg);
 }
 
 
 LocationSummary* LoadFieldInstr::MakeLocationSummary(Zone* zone,
                                                      bool opt) const {
   const intptr_t kNumInputs = 1;
@@ skipping 248 matching lines @@
   virtual void EmitNativeCode(FlowGraphCompiler* compiler) {
     __ Comment("AllocateContextSlowPath");
     __ Bind(entry_label());
 
     LocationSummary* locs = instruction_->locs();
     locs->live_registers()->Remove(locs->out(0));
 
     compiler->SaveLiveRegisters(locs);
 
     __ LoadImmediate(R10, Immediate(instruction_->num_context_variables()));
-    const ExternalLabel label(StubCode::AllocateContextEntryPoint());
     compiler->GenerateCall(instruction_->token_pos(),
-                           &label,
+                           *StubCode::AllocateContext_entry(),
                            RawPcDescriptors::kOther,
                            locs);
     ASSERT(instruction_->locs()->out(0).reg() == RAX);
     compiler->RestoreLiveRegisters(instruction_->locs());
     __ jmp(exit_label());
   }
 
  private:
   AllocateUninitializedContextInstr* instruction_;
 };
@@ skipping 33 matching lines @@
   locs->set_out(0, Location::RegisterLocation(RAX));
   return locs;
 }
 
 
 void AllocateContextInstr::EmitNativeCode(FlowGraphCompiler* compiler) {
   ASSERT(locs()->temp(0).reg() == R10);
   ASSERT(locs()->out(0).reg() == RAX);
 
   __ LoadImmediate(R10, Immediate(num_context_variables()));
-  const ExternalLabel label(StubCode::AllocateContextEntryPoint());
   compiler->GenerateCall(token_pos(),
-                         &label,
+                         *StubCode::AllocateContext_entry(),
                          RawPcDescriptors::kOther,
                          locs());
 }
 
 
 LocationSummary* InitStaticFieldInstr::MakeLocationSummary(Zone* zone,
                                                            bool opt) const {
   const intptr_t kNumInputs = 1;
   const intptr_t kNumTemps = 1;
   LocationSummary* locs = new(zone) LocationSummary(
@@ skipping 3913 matching lines @@
 LocationSummary* AllocateObjectInstr::MakeLocationSummary(Zone* zone,
                                                           bool opt) const {
   return MakeCallSummary(zone);
 }
 
 
 void AllocateObjectInstr::EmitNativeCode(FlowGraphCompiler* compiler) {
   Isolate* isolate = compiler->isolate();
   const Code& stub = Code::Handle(isolate,
                                   StubCode::GetAllocationStubForClass(cls()));
-  const ExternalLabel label(stub.EntryPoint());
+  const StubEntry stub_entry(stub);
   compiler->GenerateCall(token_pos(),
-                         &label,
+                         stub_entry,
                          RawPcDescriptors::kOther,
                          locs());
   compiler->AddStubCallTarget(stub);
   __ Drop(ArgumentCount());  // Discard arguments.
 }
 
 
 void DebugStepCheckInstr::EmitNativeCode(FlowGraphCompiler* compiler) {
   ASSERT(!compiler->is_optimizing());
-  const ExternalLabel label(StubCode::DebugStepCheckEntryPoint());
-  __ CallPatchable(&label);
+  __ CallPatchable(*StubCode::DebugStepCheck_entry());
   compiler->AddCurrentDescriptor(stub_kind_, Isolate::kNoDeoptId, token_pos());
   compiler->RecordSafepoint(locs());
 }
 
 
 LocationSummary* GrowRegExpStackInstr::MakeLocationSummary(
     Zone* zone, bool opt) const {
   const intptr_t kNumInputs = 1;
   const intptr_t kNumTemps = 0;
   LocationSummary* locs = new(zone) LocationSummary(
@@ skipping 17 matching lines @@
   __ Drop(1);
   __ popq(result);
 }
 
 
 }  // namespace dart
 
 #undef __
 
 #endif  // defined TARGET_ARCH_X64