[Interpreter] Adds support for Increment and Decrement to BytecodeGraphBuilder.

src/compiler/bytecode-graph-builder.cc

Index: src/compiler/bytecode-graph-builder.cc
diff --git a/src/compiler/bytecode-graph-builder.cc b/src/compiler/bytecode-graph-builder.cc
index 7ae16258e3be0e5fff4b2cd26e6da161fa1441f9..17f918e84bd9d7c339c1c6be3f731b51e84375b8 100644
--- a/src/compiler/bytecode-graph-builder.cc
+++ b/src/compiler/bytecode-graph-builder.cc
@@ -947,13 +947,25 @@ void BytecodeGraphBuilder::VisitShiftRightLogical(
 
 void BytecodeGraphBuilder::VisitInc(
     const interpreter::BytecodeArrayIterator& iterator) {
-  UNIMPLEMENTED();
+  const Operator* js_op =
+      javascript()->Add(language_mode(), BinaryOperationHints::Any());
+  Node* node = NewNode(js_op, environment()->LookupAccumulator(),
+                       jsgraph()->OneConstant());
+
+  AddEmptyFrameStateInputs(node);
+  environment()->BindAccumulator(node);
 }
 
 
 void BytecodeGraphBuilder::VisitDec(
     const interpreter::BytecodeArrayIterator& iterator) {
-  UNIMPLEMENTED();
+  const Operator* js_op =
+      javascript()->Subtract(language_mode(), BinaryOperationHints::Any());
+  Node* node = NewNode(js_op, environment()->LookupAccumulator(),
+                       jsgraph()->OneConstant());
+
+  AddEmptyFrameStateInputs(node);
+  environment()->BindAccumulator(node);
 }