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

runtime/vm/intermediate_language_mips.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_MIPS.
 #if defined(TARGET_ARCH_MIPS)
 
 #include "vm/intermediate_language.h"
 
 #include "vm/dart_entry.h"
@@ skipping 221 matching lines @@
   __ LoadObject(S4, arguments_descriptor);
 
   // Load closure function code in T2.
   // S4: arguments descriptor array.
   // S5: Smi 0 (no IC data; the lazy-compile stub expects a GC-safe value).
   ASSERT(locs()->in(0).reg() == T0);
   __ LoadImmediate(S5, 0);
   __ lw(T2, FieldAddress(T0, Function::instructions_offset()));
   __ AddImmediate(T2, Instructions::HeaderSize() - kHeapObjectTag);
   __ jalr(T2);
-  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* LoadLocalInstr::MakeLocationSummary(Isolate* isolate,
                                                      bool opt) const {
   return LocationSummary::Make(isolate,
@@ skipping 634 matching lines @@
     if (!function().IsNativeAutoSetupScope()) {
       entry = Simulator::RedirectExternalReference(
           entry, Simulator::kBootstrapNativeCall, function().NumParameters());
     }
 #endif
   }
   __ LoadImmediate(T5, entry);
   __ LoadImmediate(A1, argc_tag);
   compiler->GenerateCall(token_pos(),
                          stub_entry,
-                         PcDescriptors::kOther,
+                         RawPcDescriptors::kOther,
                          locs());
   __ Pop(result);
 }
 
 
 LocationSummary* StringFromCharCodeInstr::MakeLocationSummary(Isolate* isolate,
                                                               bool opt) const {
   const intptr_t kNumInputs = 1;
   // TODO(fschneider): Allow immediate operands for the char code.
   return LocationSummary::Make(isolate,
@@ skipping 807 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);
     __ mov(locs->temp(0).reg(), V0);
     compiler->RestoreLiveRegisters(locs);
 
     __ b(exit_label());
   }
 
  private:
   StoreInstanceFieldInstr* instruction_;
   const Class& cls_;
@@ skipping 358 matching lines @@
       __ Drop(2);
       __ Pop(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);
     if (locs->out(0).reg() != V0) {
       __ mov(locs->out(0).reg(), V0);
     }
     compiler->RestoreLiveRegisters(locs);
 
     __ b(exit_label());
   }
 
  private:
@@ skipping 228 matching lines @@
 void AllocateContextInstr::EmitNativeCode(FlowGraphCompiler* compiler) {
   Register temp = T1;
   ASSERT(locs()->temp(0).reg() == temp);
   ASSERT(locs()->out(0).reg() == V0);
 
   __ TraceSimMsg("AllocateContextInstr");
   __ LoadImmediate(temp, num_context_variables());
   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 104 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());
     __ b(exit_label());
   }
 
   Label* osr_entry_label() {
     ASSERT(FLAG_use_osr);
@@ skipping 1976 matching lines @@
 
 void TargetEntryInstr::EmitNativeCode(FlowGraphCompiler* compiler) {
   __ Bind(compiler->GetJumpLabel(this));
   if (!compiler->is_optimizing()) {
     if (compiler->NeedsEdgeCounter(this)) {
       compiler->EmitEdgeCounter();
     }
     // On MIPS the deoptimization descriptor points after the edge counter
     // code so that we can reuse the same pattern matching code as at call
     // sites, which 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) {
   __ TraceSimMsg("GotoInstr");
   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.  On MIPS this descriptor
     // points after the edge counter code so that we can reuse the same
     // pattern matching code as at call sites, which 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 125 matching lines @@
 }
 
 
 void AllocateObjectInstr::EmitNativeCode(FlowGraphCompiler* compiler) {
   __ TraceSimMsg("AllocateObjectInstr");
   __ Comment("AllocateObjectInstr");
   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());
   __ LoadImmediate(S4, 0);
   __ LoadImmediate(S5, 0);
   compiler->GenerateCall(token_pos(), &label, stub_kind_, locs());
 #if defined(DEBUG)
   __ LoadImmediate(S4, kInvalidObjectPointer);
   __ LoadImmediate(S5, kInvalidObjectPointer);
 #endif
 }
 
 }  // namespace dart
 
 #endif  // defined TARGET_ARCH_MIPS