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

runtime/vm/intermediate_language_x64.cc

Index: runtime/vm/intermediate_language_x64.cc
diff --git a/runtime/vm/intermediate_language_x64.cc b/runtime/vm/intermediate_language_x64.cc
index 097df6ec33f1ff5c69f4efecbd4fc5d080f2c317..90aa325ea1f858f7155c4caaa1d813812f4321fc 100644
--- a/runtime/vm/intermediate_language_x64.cc
+++ b/runtime/vm/intermediate_language_x64.cc
@@ -1726,6 +1726,8 @@ class BoxAllocationSlowPath : public SlowPathCode {
       : instruction_(instruction), cls_(cls), result_(result) {}
 
   virtual void EmitNativeCode(FlowGraphCompiler* compiler) {
+    compiler->SpecialStatsBegin(
+        CombinedCodeStatistics::kTagBoxAllocationSlowPath);
     if (Assembler::EmittingComments()) {
       __ Comment("%s slow path allocation of %s", instruction_->DebugName(),
                  String::Handle(cls_.ScrubbedName()).ToCString());
@@ -1746,6 +1748,8 @@ class BoxAllocationSlowPath : public SlowPathCode {
     __ MoveRegister(result_, RAX);
     compiler->RestoreLiveRegisters(locs);
     __ jmp(exit_label());
+    compiler->SpecialStatsEnd(
+        CombinedCodeStatistics::kTagBoxAllocationSlowPath);
   }
 
   static void Allocate(FlowGraphCompiler* compiler,
@@ -2404,6 +2408,8 @@ class AllocateContextSlowPath : public SlowPathCode {
       : instruction_(instruction) {}
 
   virtual void EmitNativeCode(FlowGraphCompiler* compiler) {
+    compiler->SpecialStatsBegin(
+        CombinedCodeStatistics::kTagAllocateContextSlowPath);
     __ Comment("AllocateContextSlowPath");
     __ Bind(entry_label());
 
@@ -2422,6 +2428,8 @@ class AllocateContextSlowPath : public SlowPathCode {
     ASSERT(instruction_->locs()->out(0).reg() == RAX);
     compiler->RestoreLiveRegisters(instruction_->locs());
     __ jmp(exit_label());
+    compiler->SpecialStatsEnd(
+        CombinedCodeStatistics::kTagAllocateContextSlowPath);
   }
 
  private:
@@ -2631,6 +2639,8 @@ class CheckStackOverflowSlowPath : public SlowPathCode {
       : instruction_(instruction) {}
 
   virtual void EmitNativeCode(FlowGraphCompiler* compiler) {
+    compiler->SpecialStatsBegin(
+        CombinedCodeStatistics::kTagCheckStackOverflowSlowPath);
     if (FLAG_use_osr && osr_entry_label()->IsLinked()) {
       __ Comment("CheckStackOverflowSlowPathOsr");
       __ Bind(osr_entry_label());
@@ -2658,6 +2668,8 @@ class CheckStackOverflowSlowPath : public SlowPathCode {
     compiler->pending_deoptimization_env_ = NULL;
     compiler->RestoreLiveRegisters(instruction_->locs());
     __ jmp(exit_label());
+    compiler->SpecialStatsEnd(
+        CombinedCodeStatistics::kTagCheckStackOverflowSlowPath);
   }
 
 
@@ -2818,6 +2830,7 @@ class CheckedSmiSlowPath : public SlowPathCode {
       : instruction_(instruction), try_index_(try_index) {}
 
   virtual void EmitNativeCode(FlowGraphCompiler* compiler) {
+    compiler->SpecialStatsBegin(CombinedCodeStatistics::kTagCheckedSmiSlowPath);
     if (Assembler::EmittingComments()) {
       __ Comment("slow path smi operation");
     }
@@ -2837,6 +2850,7 @@ class CheckedSmiSlowPath : public SlowPathCode {
     __ MoveRegister(result, RAX);
     compiler->RestoreLiveRegisters(locs);
     __ jmp(exit_label());
+    compiler->SpecialStatsEnd(CombinedCodeStatistics::kTagCheckedSmiSlowPath);
   }
 
  private:
@@ -2978,6 +2992,7 @@ class CheckedSmiComparisonSlowPath : public SlowPathCode {
         merged_(merged) {}
 
   virtual void EmitNativeCode(FlowGraphCompiler* compiler) {
+    compiler->SpecialStatsBegin(CombinedCodeStatistics::kTagCheckedSmiCmpSlowPath);
     if (Assembler::EmittingComments()) {
       __ Comment("slow path smi comparison");
     }
@@ -3005,6 +3020,7 @@ class CheckedSmiComparisonSlowPath : public SlowPathCode {
     } else {
       __ jmp(exit_label());
     }
+    compiler->SpecialStatsEnd(CombinedCodeStatistics::kTagCheckedSmiCmpSlowPath);
   }
 
  private: