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

runtime/vm/flow_graph_compiler_arm.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_ARM.
 #if defined(TARGET_ARCH_ARM)
 
 #include "vm/flow_graph_compiler.h"
 
 #include "vm/ast_printer.h"
 #include "vm/compiler.h"
 #include "vm/cpu.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.");
 DEFINE_FLAG(bool, unbox_doubles, true, "Optimize double arithmetic.");
 DECLARE_FLAG(bool, enable_simd_inline);
 
 
 FlowGraphCompiler::~FlowGraphCompiler() {
@@ skipping 950 matching lines @@
 //   FP: caller's frame pointer.
 //   PP: caller's pool pointer.
 //   R9: ic-data.
 //   R4: arguments descriptor array.
 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;
       __ ldr(R0, FieldAddress(R4, ArgumentsDescriptor::count_offset()));
       __ CompareImmediate(R0, Smi::RawValue(num_fixed_params));
       __ b(&wrong_num_arguments, NE);
       __ ldr(R1,
              FieldAddress(R4, ArgumentsDescriptor::positional_count_offset()));
       __ cmp(R0, Operand(R1));
       __ b(&correct_num_arguments, EQ);
       __ Bind(&wrong_num_arguments);
       ASSERT(assembler()->constant_pool_allowed());
       __ LeaveDartFrame(kKeepCalleePP);  // Arguments are still on the stack.
       __ Branch(*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);
     __ ldr(CTX, Address(FP, closure_parameter->index() * kWordSize));
     __ ldr(CTX, FieldAddress(CTX, Closure::context_offset()));
+    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 857 matching lines @@
   DRegister dreg = EvenDRegisterOf(reg);
   __ vldrd(dreg, Address(SP, kDoubleSize, Address::PostIndex));
 }
 
 
 #undef __
 
 }  // namespace dart
 
 #endif  // defined TARGET_ARCH_ARM