Iterate over PcDescriptors only via iterators, not via an index. (preparation for more compression …

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 729 matching lines @@
   }
   __ LoadImmediate(
       RBX, Immediate(reinterpret_cast<uword>(native_c_function())), PP);
   __ LoadImmediate(
       R10, Immediate(argc_tag), PP);
   const ExternalLabel* stub_entry = (is_bootstrap_native() || is_leaf_call) ?
       &StubCode::CallBootstrapCFunctionLabel() :
       &StubCode::CallNativeCFunctionLabel();
   compiler->GenerateCall(token_pos(),
                          stub_entry,
-                         PcDescriptors::kOther,
+                         RawPcDescriptors::kOther,
                          locs());
   __ popq(result);
 }
 
 
 static bool CanBeImmediateIndex(Value* index, intptr_t cid) {
   if (!index->definition()->IsConstant()) return false;
   const Object& constant = index->definition()->AsConstant()->value();
   if (!constant.IsSmi()) return false;
   const Smi& smi_const = Smi::Cast(constant);
@@ skipping 792 matching lines @@
     const Code& stub =
         Code::Handle(StubCode::GetAllocationStubForClass(cls_));
     const ExternalLabel label(stub.EntryPoint());
 
     LocationSummary* locs = instruction_->locs();
     locs->live_registers()->Remove(locs->out(0));
 
     compiler->SaveLiveRegisters(locs);
     compiler->GenerateCall(Scanner::kNoSourcePos,  // No token position.
                            &label,
-                           PcDescriptors::kOther,
+                           RawPcDescriptors::kOther,
                            locs);
     __ MoveRegister(locs->temp(0).reg(), RAX);
     compiler->RestoreLiveRegisters(locs);
 
     __ jmp(exit_label());
   }
 
  private:
   StoreInstanceFieldInstr* instruction_;
   const Class& cls_;
@@ skipping 438 matching lines @@
       __ Drop(2);
       __ popq(kResultReg);
       __ Bind(&done);
       return;
     }
   }
 
   __ Bind(&slow_path);
   compiler->GenerateCall(token_pos(),
                          &StubCode::AllocateArrayLabel(),
-                         PcDescriptors::kOther,
+                         RawPcDescriptors::kOther,
                          locs());
   __ Bind(&done);
   ASSERT(locs()->out(0).reg() == kResultReg);
 }
 
 
 class BoxDoubleSlowPath : public SlowPathCode {
  public:
   explicit BoxDoubleSlowPath(Instruction* instruction)
       : instruction_(instruction) { }
 
   virtual void EmitNativeCode(FlowGraphCompiler* compiler) {
     __ Comment("BoxDoubleSlowPath");
     __ Bind(entry_label());
     const Class& double_class = compiler->double_class();
     const Code& stub =
         Code::Handle(StubCode::GetAllocationStubForClass(double_class));
     const ExternalLabel label(stub.EntryPoint());
 
     LocationSummary* locs = instruction_->locs();
     locs->live_registers()->Remove(locs->out(0));
 
     compiler->SaveLiveRegisters(locs);
     compiler->GenerateCall(Scanner::kNoSourcePos,  // No token position.
                            &label,
-                           PcDescriptors::kOther,
+                           RawPcDescriptors::kOther,
                            locs);
     __ MoveRegister(locs->out(0).reg(), RAX);
     compiler->RestoreLiveRegisters(locs);
 
     __ jmp(exit_label());
   }
 
  private:
   Instruction* instruction_;
 };
@@ skipping 11 matching lines @@
     const Code& stub =
         Code::Handle(StubCode::GetAllocationStubForClass(float32x4_class));
     const ExternalLabel label(stub.EntryPoint());
 
     LocationSummary* locs = instruction_->locs();
     locs->live_registers()->Remove(locs->out(0));
 
     compiler->SaveLiveRegisters(locs);
     compiler->GenerateCall(Scanner::kNoSourcePos,  // No token position.
                            &label,
-                           PcDescriptors::kOther,
+                           RawPcDescriptors::kOther,
                            locs);
     __ MoveRegister(locs->out(0).reg(), RAX);
     compiler->RestoreLiveRegisters(locs);
 
     __ jmp(exit_label());
   }
 
  private:
   Instruction* instruction_;
 };
@@ skipping 11 matching lines @@
     const Code& stub =
         Code::Handle(StubCode::GetAllocationStubForClass(float64x2_class));
     const ExternalLabel label(stub.EntryPoint());
 
     LocationSummary* locs = instruction_->locs();
     locs->live_registers()->Remove(locs->out(0));
 
     compiler->SaveLiveRegisters(locs);
     compiler->GenerateCall(Scanner::kNoSourcePos,  // No token position.
                            &label,
-                           PcDescriptors::kOther,
+                           RawPcDescriptors::kOther,
                            locs);
     __ MoveRegister(locs->out(0).reg(), RAX);
     compiler->RestoreLiveRegisters(locs);
 
     __ jmp(exit_label());
   }
 
  private:
   Instruction* instruction_;
 };
@@ skipping 262 matching lines @@
 
 
 void AllocateContextInstr::EmitNativeCode(FlowGraphCompiler* compiler) {
   ASSERT(locs()->temp(0).reg() == R10);
   ASSERT(locs()->out(0).reg() == RAX);
 
   __ LoadImmediate(R10, Immediate(num_context_variables()), PP);
   const ExternalLabel label(StubCode::AllocateContextEntryPoint());
   compiler->GenerateCall(token_pos(),
                          &label,
-                         PcDescriptors::kOther,
+                         RawPcDescriptors::kOther,
                          locs());
 }
 
 
 LocationSummary* CloneContextInstr::MakeLocationSummary(Isolate* isolate,
                                                         bool opt) const {
   const intptr_t kNumInputs = 1;
   const intptr_t kNumTemps = 0;
   LocationSummary* locs = new(isolate) LocationSummary(
       isolate, kNumInputs, kNumTemps, LocationSummary::kCall);
@@ skipping 93 matching lines @@
     Environment* env = compiler->SlowPathEnvironmentFor(instruction_);
     compiler->pending_deoptimization_env_ = env;
     compiler->GenerateRuntimeCall(instruction_->token_pos(),
                                   instruction_->deopt_id(),
                                   kStackOverflowRuntimeEntry,
                                   0,
                                   instruction_->locs());
 
     if (FLAG_use_osr && !compiler->is_optimizing() && instruction_->in_loop()) {
       // In unoptimized code, record loop stack checks as possible OSR entries.
-      compiler->AddCurrentDescriptor(PcDescriptors::kOsrEntry,
+      compiler->AddCurrentDescriptor(RawPcDescriptors::kOsrEntry,
                                      instruction_->deopt_id(),
                                      0);  // No token position.
     }
     compiler->pending_deoptimization_env_ = NULL;
     compiler->RestoreLiveRegisters(instruction_->locs());
     __ jmp(exit_label());
   }
 
 
   Label* osr_entry_label() {
@@ skipping 912 matching lines @@
     const Code& stub =
         Code::Handle(StubCode::GetAllocationStubForClass(int32x4_class));
     const ExternalLabel label(stub.EntryPoint());
 
     LocationSummary* locs = instruction_->locs();
     locs->live_registers()->Remove(locs->out(0));
 
     compiler->SaveLiveRegisters(locs);
     compiler->GenerateCall(Scanner::kNoSourcePos,  // No token position.
                            &label,
-                           PcDescriptors::kOther,
+                           RawPcDescriptors::kOther,
                            locs);
     __ MoveRegister(locs->out(0).reg(), RAX);
     compiler->RestoreLiveRegisters(locs);
 
     __ jmp(exit_label());
   }
 
  private:
   BoxInt32x4Instr* instruction_;
 };
@@ skipping 2144 matching lines @@
 
 void TargetEntryInstr::EmitNativeCode(FlowGraphCompiler* compiler) {
   __ Bind(compiler->GetJumpLabel(this));
   if (!compiler->is_optimizing()) {
     if (compiler->NeedsEdgeCounter(this)) {
       compiler->EmitEdgeCounter();
     }
     // The deoptimization descriptor points after the edge counter code for
     // uniformity with ARM and MIPS, where we can reuse pattern matching
     // code that matches backwards from the end of the pattern.
-    compiler->AddCurrentDescriptor(PcDescriptors::kDeopt,
+    compiler->AddCurrentDescriptor(RawPcDescriptors::kDeopt,
                                    deopt_id_,
                                    Scanner::kNoSourcePos);
   }
   if (HasParallelMove()) {
     compiler->parallel_move_resolver()->EmitNativeCode(parallel_move());
   }
 }
 
 
 LocationSummary* GotoInstr::MakeLocationSummary(Isolate* isolate,
                                                 bool opt) const {
   return new(isolate) LocationSummary(isolate, 0, 0, LocationSummary::kNoCall);
 }
 
 
 void GotoInstr::EmitNativeCode(FlowGraphCompiler* compiler) {
   if (!compiler->is_optimizing()) {
     if (FLAG_emit_edge_counters) {
       compiler->EmitEdgeCounter();
     }
     // Add a deoptimization descriptor for deoptimizing instructions that
     // may be inserted before this instruction.  This descriptor points
     // after the edge counter for uniformity with ARM and MIPS, where we can
     // reuse pattern matching that matches backwards from the end of the
     // pattern.
-    compiler->AddCurrentDescriptor(PcDescriptors::kDeopt,
+    compiler->AddCurrentDescriptor(RawPcDescriptors::kDeopt,
                                    GetDeoptId(),
                                    Scanner::kNoSourcePos);
   }
   if (HasParallelMove()) {
     compiler->parallel_move_resolver()->EmitNativeCode(parallel_move());
   }
 
   // We can fall through if the successor is the next block in the list.
   // Otherwise, we need a jump.
   if (!compiler->CanFallThroughTo(successor())) {
@@ skipping 121 matching lines @@
   // Function in RAX.
   ASSERT(locs()->in(0).reg() == RAX);
   __ movq(RCX, FieldAddress(RAX, Function::instructions_offset()));
 
   // RAX: Function.
   // R10: Arguments descriptor array.
   // RBX: Smi 0 (no IC data; the lazy-compile stub expects a GC-safe value).
   __ xorq(RBX, RBX);
   __ addq(RCX, Immediate(Instructions::HeaderSize() - kHeapObjectTag));
   __ call(RCX);
-  compiler->AddCurrentDescriptor(PcDescriptors::kClosureCall,
+  compiler->AddCurrentDescriptor(RawPcDescriptors::kClosureCall,
                                  deopt_id(),
                                  token_pos());
   compiler->RecordSafepoint(locs());
   // Marks either the continuation point in unoptimized code or the
   // deoptimization point in optimized code, after call.
   const intptr_t deopt_id_after = Isolate::ToDeoptAfter(deopt_id());
   if (compiler->is_optimizing()) {
     compiler->AddDeoptIndexAtCall(deopt_id_after, token_pos());
   } else {
     // Add deoptimization continuation point after the call and before the
     // arguments are removed.
-    compiler->AddCurrentDescriptor(PcDescriptors::kDeopt,
+    compiler->AddCurrentDescriptor(RawPcDescriptors::kDeopt,
                                    deopt_id_after,
                                    token_pos());
   }
   __ Drop(argument_count);
 }
 
 
 LocationSummary* BooleanNegateInstr::MakeLocationSummary(Isolate* isolate,
                                                          bool opt) const {
   return LocationSummary::Make(isolate,
@@ skipping 20 matching lines @@
                                                           bool opt) const {
   return MakeCallSummary();
 }
 
 
 void AllocateObjectInstr::EmitNativeCode(FlowGraphCompiler* compiler) {
   const Code& stub = Code::Handle(StubCode::GetAllocationStubForClass(cls()));
   const ExternalLabel label(stub.EntryPoint());
   compiler->GenerateCall(token_pos(),
                          &label,
-                         PcDescriptors::kOther,
+                         RawPcDescriptors::kOther,
                          locs());
   __ Drop(ArgumentCount());  // Discard arguments.
 }
 
 
 void DebugStepCheckInstr::EmitNativeCode(FlowGraphCompiler* compiler) {
   ASSERT(!compiler->is_optimizing());
   const ExternalLabel label(StubCode::DebugStepCheckEntryPoint());
   __ movq(R10, Immediate(0));
   __ movq(RBX, Immediate(0));
   compiler->GenerateCall(token_pos(), &label, stub_kind_, locs());
 #if defined(DEBUG)
   __ movq(R10, Immediate(kInvalidObjectPointer));
   __ movq(RBX, Immediate(kInvalidObjectPointer));
 #endif
 }
 
 }  // namespace dart
 
 #undef __
 
 #endif  // defined TARGET_ARCH_X64