[turbofan] Add performance counters for escape analysis

src/compiler/escape-analysis-reducer.cc

Index: src/compiler/escape-analysis-reducer.cc
diff --git a/src/compiler/escape-analysis-reducer.cc b/src/compiler/escape-analysis-reducer.cc
index 1fece43fc3d2236adcc703ef7884efcecbab7723..4cf8f9279e99deff88970af2f2fb8522e384c46c 100644
--- a/src/compiler/escape-analysis-reducer.cc
+++ b/src/compiler/escape-analysis-reducer.cc
@@ -5,7 +5,7 @@
 #include "src/compiler/escape-analysis-reducer.h"
 
 #include "src/compiler/js-graph.h"
-#include "src/compiler/js-operator.h"
+#include "src/counters.h"
 
 namespace v8 {
 namespace internal {
@@ -50,6 +50,11 @@ Reduction EscapeAnalysisReducer::ReduceLoad(Node* node) {
   DCHECK(node->opcode() == IrOpcode::kLoadField ||
          node->opcode() == IrOpcode::kLoadElement);
   if (Node* rep = escape_analysis()->GetReplacement(node)) {
+    jsgraph()

[Benedikt Meurer, 2016/01/05 04:55:58]

Nit: Add EscapeAnalysisReducer::isolate() and/or
EscapeAnalysisReducer::counters() accessors.

[sigurds, 2016/01/05 09:22:26]

Done.

+        ->isolate()
+        ->counters()
+        ->turbo_escape_loads_replaced()
+        ->Increment();
     if (FLAG_trace_turbo_escape) {
       PrintF("Replaced #%d (%s) with #%d (%s)\n", node->id(),
              node->op()->mnemonic(), rep->id(), rep->op()->mnemonic());
@@ -80,6 +85,11 @@ Reduction EscapeAnalysisReducer::ReduceAllocate(Node* node) {
   DCHECK_EQ(node->opcode(), IrOpcode::kAllocate);
   if (escape_analysis()->IsVirtual(node)) {
     RelaxEffectsAndControls(node);
+    jsgraph()

[Benedikt Meurer, 2016/01/05 04:55:58]

Nit: Add EscapeAnalysisReducer::isolate() and/or
EscapeAnalysisReducer::counters() accessors.

[sigurds, 2016/01/05 09:22:26]

Done.

+        ->isolate()
+        ->counters()
+        ->turbo_escape_allocs_replaced()
+        ->Increment();
     if (FLAG_trace_turbo_escape) {
       PrintF("Removed allocate #%d from effect chain\n", node->id());
     }