Reorder switch clauses using newly-introduced execution counters in

src/ia32/lithium-codegen-ia32.cc

Index: src/ia32/lithium-codegen-ia32.cc
diff --git a/src/ia32/lithium-codegen-ia32.cc b/src/ia32/lithium-codegen-ia32.cc
index fb566d1dd1fb4231730cc2856b0a382c4415d5cd..6d26fa656952a456fe117473ec301ebe8557a706 100644
--- a/src/ia32/lithium-codegen-ia32.cc
+++ b/src/ia32/lithium-codegen-ia32.cc
@@ -106,6 +106,7 @@ void LCodeGen::FinishCode(Handle<Code> code) {
     RegisterDependentCodeForEmbeddedMaps(code);
   }
   PopulateDeoptimizationData(code);
+  PopulateDeoptCounterCells(code);
   if (!info()->IsStub()) {
     Deoptimizer::EnsureRelocSpaceForLazyDeoptimization(code);
   }
@@ -6390,6 +6391,52 @@ void LCodeGen::DoLazyBailout(LLazyBailout* instr) {
 }
 
 
+void LCodeGen::DoDeoptCounter(LDeoptCounter* instr) {
+  Handle<JSGlobalPropertyCell> cell =
+      isolate()->factory()->NewJSGlobalPropertyCell(
+          Handle<Object>(Smi::FromInt(instr->initial_value()), isolate()));
+  LDeoptCounterCell* deopt_cell =
+      new(zone()) LDeoptCounterCell(instr->id(), instr->max_value(), cell);
+  deopt_counter_cells_.Add(deopt_cell, zone());
+}
+
+
+void LCodeGen::DoDeoptCounterAdd(LDeoptCounterAdd* instr) {
+  for (int i = 0; i < deopt_counter_cells_.length(); ++i) {
+    LDeoptCounterCell* deopt_cell = deopt_counter_cells_[i];
+    if (deopt_cell->id() != instr->counter()) continue;
+
+    Handle<JSGlobalPropertyCell> cell = deopt_cell->cell();
+    Register scratch = ToRegister(instr->temp());
+    Register scratch2 = ToRegister(instr->temp2());
+
+    // Increment counter
+    Label ok;
+    Operand counter = FieldOperand(scratch,
+                                   JSGlobalPropertyCell::kValueOffset);
+
+    ASSERT(instr->delta() != 0);
+    __ LoadHeapObject(scratch, cell);
+    __ mov(scratch2, counter);
+    __ AssertSmi(scratch2);
+    __ add(scratch2, Immediate(Smi::FromInt(instr->delta())));
+    __ cmp(scratch2, Immediate(Smi::FromInt(deopt_cell->max_value())));
+    __ j(less_equal, &ok, Label::kNear);
+
+    // Limit counter
+    __ mov(scratch2, Immediate(Smi::FromInt(deopt_cell->max_value())));
+    __ bind(&ok);
+    __ mov(counter, scratch2);
+
+    // And deoptimize on negative value
+    __ cmp(scratch2, Immediate(Smi::FromInt(0)));
+    DeoptimizeIf(less_equal, instr->environment(), Deoptimizer::SOFT);
+    return;
+  }
+  UNREACHABLE();
+}
+
+
 void LCodeGen::DoDeoptimize(LDeoptimize* instr) {
   if (instr->hydrogen_value()->IsSoftDeoptimize()) {
     SoftDeoptimize(instr->environment());