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

runtime/vm/flow_graph_compiler_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/flow_graph_compiler.h"
 
 #include "vm/ast_printer.h"
@@ skipping 1124 matching lines @@
 
   if (is_optimizing()) {
     lazy_deopt_pc_offset_ = assembler()->CodeSize();
     __ Branch(&StubCode::DeoptimizeLazyLabel());
   }
 }
 
 
 void FlowGraphCompiler::GenerateCall(intptr_t token_pos,
                                      const ExternalLabel* label,
-                                     PcDescriptors::Kind kind,
+                                     RawPcDescriptors::Kind kind,
                                      LocationSummary* locs) {
   __ BranchLinkPatchable(label);
   AddCurrentDescriptor(kind, Isolate::kNoDeoptId, token_pos);
   RecordSafepoint(locs);
 }
 
 
 void FlowGraphCompiler::GenerateDartCall(intptr_t deopt_id,
                                          intptr_t token_pos,
                                          const ExternalLabel* label,
-                                         PcDescriptors::Kind kind,
+                                         RawPcDescriptors::Kind kind,
                                          LocationSummary* locs) {
   __ BranchLinkPatchable(label);
   AddCurrentDescriptor(kind, deopt_id, token_pos);
   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 (is_optimizing()) {
     AddDeoptIndexAtCall(deopt_id_after, token_pos);
   } else {
     // Add deoptimization continuation point after the call and before the
     // arguments are removed.
-    AddCurrentDescriptor(PcDescriptors::kDeopt,
+    AddCurrentDescriptor(RawPcDescriptors::kDeopt,
                          deopt_id_after,
                          token_pos);
   }
 }
 
 
 void FlowGraphCompiler::GenerateRuntimeCall(intptr_t token_pos,
                                             intptr_t deopt_id,
                                             const RuntimeEntry& entry,
                                             intptr_t argument_count,
                                             LocationSummary* locs) {
   __ CallRuntime(entry, argument_count);
-  AddCurrentDescriptor(PcDescriptors::kOther, deopt_id, token_pos);
+  AddCurrentDescriptor(RawPcDescriptors::kOther, deopt_id, token_pos);
   RecordSafepoint(locs);
   if (deopt_id != Isolate::kNoDeoptId) {
     // 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 (is_optimizing()) {
       AddDeoptIndexAtCall(deopt_id_after, token_pos);
     } else {
       // Add deoptimization continuation point after the call and before the
       // arguments are removed.
-      AddCurrentDescriptor(PcDescriptors::kDeopt,
+      AddCurrentDescriptor(RawPcDescriptors::kDeopt,
                            deopt_id_after,
                            token_pos);
     }
   }
 }
 
 
 void FlowGraphCompiler::EmitEdgeCounter() {
   // We do not check for overflow when incrementing the edge counter.  The
   // function should normally be optimized long before the counter can
@@ skipping 23 matching lines @@
   // to inlining in optimized code, that function may not correspond to the
   // top-level function (parsed_function().function()) which could be
   // reoptimized and which counter needs to be incremented.
   // Pass the function explicitly, it is used in IC stub.
   __ TraceSimMsg("OptimizedInstanceCall");
   __ LoadObject(T0, parsed_function().function());
   __ LoadObject(S5, ic_data);
   GenerateDartCall(deopt_id,
                    token_pos,
                    target_label,
-                   PcDescriptors::kIcCall,
+                   RawPcDescriptors::kIcCall,
                    locs);
   __ Drop(argument_count);
 }
 
 
 void FlowGraphCompiler::EmitInstanceCall(ExternalLabel* target_label,
                                          const ICData& ic_data,
                                          intptr_t argument_count,
                                          intptr_t deopt_id,
                                          intptr_t token_pos,
                                          LocationSummary* locs) {
   ASSERT(Array::Handle(ic_data.arguments_descriptor()).Length() > 0);
   __ TraceSimMsg("InstanceCall");
   __ LoadImmediate(S4, 0);
   __ LoadObject(S5, ic_data);
   GenerateDartCall(deopt_id,
                    token_pos,
                    target_label,
-                   PcDescriptors::kIcCall,
+                   RawPcDescriptors::kIcCall,
                    locs);
   __ TraceSimMsg("InstanceCall return");
   __ Drop(argument_count);
 #if defined(DEBUG)
   __ LoadImmediate(S4, kInvalidObjectPointer);
 #endif
 }
 
 
 void FlowGraphCompiler::EmitMegamorphicInstanceCall(
@@ skipping 45 matching lines @@
   // be invoked as a normal Dart function.
   __ sll(T1, T3, 2);
   __ addu(T1, T2, T1);
   __ lw(T0, FieldAddress(T1, base + kWordSize));
 
   __ lw(T1, FieldAddress(T0, Function::instructions_offset()));
   __ LoadObject(S5, ic_data);
   __ LoadObject(S4, arguments_descriptor);
   __ AddImmediate(T1, Instructions::HeaderSize() - kHeapObjectTag);
   __ jalr(T1);
-  AddCurrentDescriptor(PcDescriptors::kOther, Isolate::kNoDeoptId, token_pos);
+  AddCurrentDescriptor(RawPcDescriptors::kOther,
+      Isolate::kNoDeoptId, token_pos);
   RecordSafepoint(locs);
   AddDeoptIndexAtCall(Isolate::ToDeoptAfter(deopt_id), token_pos);
   __ Drop(argument_count);
 }
 
 
 void FlowGraphCompiler::EmitUnoptimizedStaticCall(
     intptr_t argument_count,
     intptr_t deopt_id,
     intptr_t token_pos,
     LocationSummary* locs,
     const ICData& ic_data) {
   uword label_address = 0;
   if (ic_data.NumArgsTested() == 0) {
     label_address = StubCode::ZeroArgsUnoptimizedStaticCallEntryPoint();
   } else if (ic_data.NumArgsTested() == 2) {
     label_address = StubCode::TwoArgsUnoptimizedStaticCallEntryPoint();
   } else {
     UNIMPLEMENTED();
   }
   ExternalLabel target_label(label_address);
   __ LoadImmediate(S4, 0);
   __ LoadObject(S5, ic_data);
   GenerateDartCall(deopt_id,
                    token_pos,
                    &target_label,
-                   PcDescriptors::kUnoptStaticCall,
+                   RawPcDescriptors::kUnoptStaticCall,
                    locs);
 #if defined(DEBUG)
   __ LoadImmediate(S4, kInvalidObjectPointer);
 #endif
   __ Drop(argument_count);
 }
 
 
 void FlowGraphCompiler::EmitOptimizedStaticCall(
     const Function& function,
     const Array& arguments_descriptor,
     intptr_t argument_count,
     intptr_t deopt_id,
     intptr_t token_pos,
     LocationSummary* locs) {
   __ TraceSimMsg("StaticCall");
   __ LoadObject(S4, arguments_descriptor);
   // Do not use the code from the function, but let the code be patched so that
   // we can record the outgoing edges to other code.
   GenerateDartCall(deopt_id,
                    token_pos,
                    &StubCode::CallStaticFunctionLabel(),
-                   PcDescriptors::kOptStaticCall,
+                   RawPcDescriptors::kOptStaticCall,
                    locs);
   AddStaticCallTarget(function);
   __ Drop(argument_count);
 }
 
 
 void FlowGraphCompiler::EmitEqualityRegConstCompare(Register reg,
                                                     const Object& obj,
                                                     bool needs_number_check,
                                                     intptr_t token_pos) {
   __ TraceSimMsg("EqualityRegConstCompare");
   if (needs_number_check) {
     ASSERT(!obj.IsMint() && !obj.IsDouble() && !obj.IsBigint());
     __ addiu(SP, SP, Immediate(-2 * kWordSize));
     __ sw(reg, Address(SP, 1 * kWordSize));
     __ LoadObject(TMP, obj);
     __ sw(TMP, Address(SP, 0 * kWordSize));
     if (is_optimizing()) {
       __ BranchLinkPatchable(
           &StubCode::OptimizedIdenticalWithNumberCheckLabel());
     } else {
       __ BranchLinkPatchable(
           &StubCode::UnoptimizedIdenticalWithNumberCheckLabel());
     }
     if (token_pos != Scanner::kNoSourcePos) {
-      AddCurrentDescriptor(PcDescriptors::kRuntimeCall,
+      AddCurrentDescriptor(RawPcDescriptors::kRuntimeCall,
                            Isolate::kNoDeoptId,
                            token_pos);
     }
     __ TraceSimMsg("EqualityRegConstCompare return");
     __ lw(reg, Address(SP, 1 * kWordSize));  // Restore 'reg'.
     __ addiu(SP, SP, Immediate(2 * kWordSize));  // Discard constant.
     return;
   }
   __ CompareObject(CMPRES1, CMPRES2, reg, obj);
 }
@@ skipping 12 matching lines @@
     if (is_optimizing()) {
       __ BranchLinkPatchable(
           &StubCode::OptimizedIdenticalWithNumberCheckLabel());
     } else {
       __ LoadImmediate(S4, 0);
       __ LoadImmediate(S5, 0);
       __ BranchLinkPatchable(
           &StubCode::UnoptimizedIdenticalWithNumberCheckLabel());
     }
     if (token_pos != Scanner::kNoSourcePos) {
-      AddCurrentDescriptor(PcDescriptors::kRuntimeCall,
+      AddCurrentDescriptor(RawPcDescriptors::kRuntimeCall,
                            Isolate::kNoDeoptId,
                            token_pos);
     }
 #if defined(DEBUG)
     if (!is_optimizing()) {
       // Do this *after* adding the pc descriptor!
       __ LoadImmediate(S4, kInvalidObjectPointer);
       __ LoadImmediate(S5, kInvalidObjectPointer);
     }
 #endif
@@ skipping 112 matching lines @@
     if (is_last_check) {
       __ BranchNotEqual(class_id_reg, sorted[i].cid, deopt);
     } else {
       __ BranchNotEqual(class_id_reg, sorted[i].cid, &next_test);
     }
     // Do not use the code from the function, but let the code be patched so
     // that we can record the outgoing edges to other code.
     GenerateDartCall(deopt_id,
                      token_index,
                      &StubCode::CallStaticFunctionLabel(),
-                     PcDescriptors::kOptStaticCall,
+                     RawPcDescriptors::kOptStaticCall,
                      locs);
     const Function& function = *sorted[i].target;
     AddStaticCallTarget(function);
     __ Drop(argument_count);
     if (!is_last_check) {
       __ b(&match_found);
     }
     __ Bind(&next_test);
   }
   __ Bind(&match_found);
@@ skipping 232 matching lines @@
   __ AddImmediate(SP, kDoubleSize);
 }
 
 
 #undef __
 
 
 }  // namespace dart
 
 #endif  // defined TARGET_ARCH_MIPS