PATCH (not to be comitted): Support for printing instruction statistics

runtime/vm/flow_graph_compiler_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/flow_graph_compiler.h"
 
 #include "vm/ast_printer.h"
 #include "vm/compiler.h"
 #include "vm/dart_entry.h"
 #include "vm/deopt_instructions.h"
 #include "vm/il_printer.h"
 #include "vm/instructions.h"
 #include "vm/locations.h"
 #include "vm/object_store.h"
 #include "vm/parser.h"
 #include "vm/stack_frame.h"
 #include "vm/stub_code.h"
 #include "vm/symbols.h"
+#include "vm/code_statistics.h"
 
 namespace dart {
 
 DEFINE_FLAG(bool, trap_on_deoptimization, false, "Trap on deoptimization.");
 DEFINE_FLAG(bool, unbox_mints, true, "Optimize 64-bit integer arithmetic.");
 DECLARE_FLAG(bool, enable_simd_inline);
 
 
 FlowGraphCompiler::~FlowGraphCompiler() {
   // BlockInfos are zone-allocated, so their destructors are not called.
@@ skipping 943 matching lines @@
   }
 }
 
 
 void FlowGraphCompiler::CompileGraph() {
   InitCompiler();
   const Function& function = parsed_function().function();
 
 #ifdef DART_PRECOMPILER
   if (function.IsDynamicFunction()) {
+    SpecialStatsBegin(CombinedCodeStatistics::kTagCheckedEntry);
     __ MonomorphicCheckedEntry();
+    SpecialStatsEnd(CombinedCodeStatistics::kTagCheckedEntry);
   }
 #endif  // DART_PRECOMPILER
 
   if (TryIntrinsify()) {
     // Skip regular code generation.
     return;
   }
 
+  SpecialStatsBegin(CombinedCodeStatistics::kTagFrameEntry);
   EmitFrameEntry();
+  SpecialStatsEnd(CombinedCodeStatistics::kTagFrameEntry);
   ASSERT(assembler()->constant_pool_allowed());
 
   const int num_fixed_params = function.num_fixed_parameters();
   const int num_copied_params = parsed_function().num_copied_params();
   const int num_locals = parsed_function().num_stack_locals();
 
   // We check the number of passed arguments when we have to copy them due to
   // the presence of optional parameters.
   // No such checking code is generated if only fixed parameters are declared,
   // unless we are in debug mode or unless we are compiling a closure.
   if (num_copied_params == 0) {
     const bool check_arguments =
         function.IsClosureFunction() && !flow_graph().IsCompiledForOsr();
     if (check_arguments) {
       __ Comment("Check argument count");
+      SpecialStatsBegin(CombinedCodeStatistics::kTagCheckArgumentCount);
       // Check that exactly num_fixed arguments are passed in.
       Label correct_num_arguments, wrong_num_arguments;
       __ movq(RAX, FieldAddress(R10, ArgumentsDescriptor::count_offset()));
       __ CompareImmediate(RAX, Immediate(Smi::RawValue(num_fixed_params)));
       __ j(NOT_EQUAL, &wrong_num_arguments, Assembler::kNearJump);
       __ cmpq(RAX, FieldAddress(
                        R10, ArgumentsDescriptor::positional_count_offset()));
       __ j(EQUAL, &correct_num_arguments, Assembler::kNearJump);
 
       __ Bind(&wrong_num_arguments);
       __ LeaveDartFrame(kKeepCalleePP);  // Leave arguments on the stack.
       __ Jmp(*StubCode::CallClosureNoSuchMethod_entry());
       // The noSuchMethod call may return to the caller, but not here.
       __ Bind(&correct_num_arguments);
+      SpecialStatsEnd(CombinedCodeStatistics::kTagCheckArgumentCount);
     }
   } else if (!flow_graph().IsCompiledForOsr()) {
+    SpecialStatsBegin(CombinedCodeStatistics::kTagCopyParameters);
     CopyParameters();
+    SpecialStatsEnd(CombinedCodeStatistics::kTagCopyParameters);
   }
 
   if (function.IsClosureFunction() && !flow_graph().IsCompiledForOsr()) {
+    SpecialStatsBegin(CombinedCodeStatistics::kTagLoadClosureContext);
     // Load context from the closure object (first argument).
     LocalScope* scope = parsed_function().node_sequence()->scope();
     LocalVariable* closure_parameter = scope->VariableAt(0);
     __ movq(CTX, Address(RBP, closure_parameter->index() * kWordSize));
     __ movq(CTX, FieldAddress(CTX, Closure::context_offset()));
 #ifdef DEBUG
     Label ok;
     __ LoadClassId(RAX, CTX);
     __ cmpq(RAX, Immediate(kContextCid));
     __ j(EQUAL, &ok, Assembler::kNearJump);
     __ Stop("Incorrect context at entry");
     __ Bind(&ok);
 #endif
+    SpecialStatsEnd(CombinedCodeStatistics::kTagLoadClosureContext);
   }
 
   // In unoptimized code, initialize (non-argument) stack allocated slots to
   // null.
   if (!is_optimizing()) {
     ASSERT(num_locals > 0);  // There is always at least context_var.
     __ Comment("Initialize spill slots");
     const intptr_t slot_base = parsed_function().first_stack_local_index();
     const intptr_t context_index =
         parsed_function().current_context_var()->index();
@@ skipping 15 matching lines @@
         ASSERT(num_locals > 1);
         __ movq(Address(RBP, (slot_base - i) * kWordSize), RAX);
       }
     }
   }
 
   EndCodeSourceRange(TokenPosition::kDartCodePrologue);
   ASSERT(!block_order().is_empty());
   VisitBlocks();
 
+  SpecialStatsBegin(CombinedCodeStatistics::kDebugAfterBody);
   __ int3();
+  SpecialStatsEnd(CombinedCodeStatistics::kDebugAfterBody);
+
   ASSERT(assembler()->constant_pool_allowed());
   GenerateDeferredCode();
 }
 
 
 void FlowGraphCompiler::GenerateCall(TokenPosition token_pos,
                                      const StubEntry& stub_entry,
                                      RawPcDescriptors::Kind kind,
                                      LocationSummary* locs) {
   __ Call(stub_entry);
@@ skipping 688 matching lines @@
   __ movups(reg, Address(RSP, 0));
   __ AddImmediate(RSP, Immediate(kFpuRegisterSize));
 }
 
 
 #undef __
 
 }  // namespace dart
 
 #endif  // defined TARGET_ARCH_X64