Reorder switch clauses using newly-introduced execution counters in

src/arm/full-codegen-arm.cc

Index: src/arm/full-codegen-arm.cc
diff --git a/src/arm/full-codegen-arm.cc b/src/arm/full-codegen-arm.cc
index 2b0491493134f5425720a941a17b9e967e1bd784..9e2e3736e9f3337ab844af9a9ad4b03443d75bde 100644
--- a/src/arm/full-codegen-arm.cc
+++ b/src/arm/full-codegen-arm.cc
@@ -1061,10 +1061,33 @@ void FullCodeGenerator::VisitSwitchStatement(SwitchStatement* stmt) {
 
   // Compile all the case bodies.
   for (int i = 0; i < clauses->length(); i++) {
-    Comment cmnt(masm_, "[ Case body");
     CaseClause* clause = clauses->at(i);
     __ bind(clause->body_target());
     PrepareForBailoutForId(clause->EntryId(), NO_REGISTERS);
+
+    // Initialize counter
+    { Comment cmnt(masm_, "[ Case hit counter");
+      Handle<JSGlobalPropertyCell> cell =
+          isolate()->factory()->NewJSGlobalPropertyCell(
+              Handle<Object>(Smi::FromInt(0), isolate()));
+      RecordTypeFeedbackCell(clause->CounterId(), cell);
+
+      // Increment counter
+      Label ok;
+      MemOperand counter =
+          FieldMemOperand(r1, JSGlobalPropertyCell::kValueOffset);
+
+      __ LoadHeapObject(r1, cell);
+      __ AssertSmi(counter);
+      __ ldr(r2, counter);
+      __ add(r2, r2, Operand(Smi::FromInt(1)), SetCC);
+      __ b(vc, &ok);
+      __ sub(r2, r2, Operand(Smi::FromInt(1)), SetCC);
+      __ bind(&ok);
+      __ str(r2, counter);
+    }
+
+    Comment cmnt(masm_, "[ Case body");
     VisitStatements(clause->statements());
   }