WIP: type profiling.

src/interpreter/bytecode-generator.cc

Index: src/interpreter/bytecode-generator.cc
diff --git a/src/interpreter/bytecode-generator.cc b/src/interpreter/bytecode-generator.cc
index e2ef3ea199ad1d0c5ce45c9c61cf7f663cd5a711..1fe15926a1b38dd7866871332cfeed1f215d82cb 100644
--- a/src/interpreter/bytecode-generator.cc
+++ b/src/interpreter/bytecode-generator.cc
@@ -898,6 +898,7 @@ void BytecodeGenerator::VisitVariableDeclaration(VariableDeclaration* decl) {
           ->LoadLiteral(variable->raw_name())
           .StoreAccumulatorInRegister(name)
           .CallRuntime(Runtime::kDeclareEvalVar, name);
+
       break;
     }
     case VariableLocation::MODULE:
@@ -2190,18 +2191,31 @@ void BytecodeGenerator::VisitAssignment(Assignment* expr) {
   LhsKind assign_type = Property::GetAssignType(property);
 
   // Evaluate LHS expression.
+  Register lhs_name = register_allocator()->NewRegister();
+
   switch (assign_type) {
     case VARIABLE:
+      if (true || FLAG_type_profile) {
+        builder()
+            ->LoadLiteral(expr->target()->AsVariableProxy()->var()->raw_name())
+            .StoreAccumulatorInRegister(lhs_name);
+      }
       // Nothing to do to evaluate variable assignment LHS.
       break;
     case NAMED_PROPERTY: {
       object = VisitForRegisterValue(property->obj());
       name = property->key()->AsLiteral()->AsRawPropertyName();
+      if (true || FLAG_type_profile) {
+        builder()->LoadLiteral(name).StoreAccumulatorInRegister(lhs_name);
+      }
       break;
     }
     case KEYED_PROPERTY: {
       object = VisitForRegisterValue(property->obj());
       key = VisitForRegisterValue(property->key());
+      if (true || FLAG_type_profile) {
+        builder()->StoreAccumulatorInRegister(lhs_name);
+      }
       break;
     }
     case NAMED_SUPER_PROPERTY: {
@@ -2214,6 +2228,9 @@ void BytecodeGenerator::VisitAssignment(Assignment* expr) {
       builder()
           ->LoadLiteral(property->key()->AsLiteral()->AsRawPropertyName())
           .StoreAccumulatorInRegister(super_property_args[2]);
+      if (true || FLAG_type_profile) {
+        builder()->StoreAccumulatorInRegister(lhs_name);
+      }
       break;
     }
     case KEYED_SUPER_PROPERTY: {
@@ -2224,6 +2241,10 @@ void BytecodeGenerator::VisitAssignment(Assignment* expr) {
       VisitForRegisterValue(super_property->home_object(),
                             super_property_args[1]);
       VisitForRegisterValue(property->key(), super_property_args[2]);
+      if (true || FLAG_type_profile) {
+        builder()->StoreAccumulatorInRegister(lhs_name);
+      }
+
       break;
     }
   }
@@ -2312,6 +2333,17 @@ void BytecodeGenerator::VisitAssignment(Assignment* expr) {
       break;
     }
   }
+
+  // Value is in accumulator.
+  if (FLAG_type_profile) {
+    Register value = register_allocator()->NewRegister();
+    builder()->StoreAccumulatorInRegister(value);
+
+    FeedbackSlot collect_type_feedback_slot = expr->CollectTypeProfileSlot();
+
+    builder()->CollectTypeProfile(lhs_name, value,
+                                  feedback_index(collect_type_feedback_slot));
+  }
 }
 
 void BytecodeGenerator::VisitYield(Yield* expr) {