[turbofan] Introduce a dedicated CheckMaps simplified operator.

src/compiler/typer.h

Index: src/compiler/typer.h
diff --git a/src/compiler/typer.h b/src/compiler/typer.h
index ccd8c4d836c8aa6a536f13607e652480df8c2b67..8511a380b1633349700470c0c468d3b2a9c7cbbf 100644
--- a/src/compiler/typer.h
+++ b/src/compiler/typer.h
@@ -5,7 +5,6 @@
 #ifndef V8_COMPILER_TYPER_H_
 #define V8_COMPILER_TYPER_H_
 
-#include "src/base/flags.h"
 #include "src/compiler/graph.h"
 #include "src/compiler/operation-typer.h"
 #include "src/types.h"
@@ -14,7 +13,6 @@ namespace v8 {
 namespace internal {
 
 // Forward declarations.
-class CompilationDependencies;
 class TypeCache;
 
 namespace compiler {
@@ -24,15 +22,7 @@ class OperationTyper;
 
 class Typer {
  public:
-  // Flags that control the mode of operation.
-  enum Flag {
-    kNoFlags = 0u,
-    kDeoptimizationEnabled = 1u << 0,
-  };
-  typedef base::Flags<Flag> Flags;
-
-  Typer(Isolate* isolate, Graph* graph, Flags flags = kNoFlags,
-        CompilationDependencies* dependencies = nullptr);
+  Typer(Isolate* isolate, Graph* graph);
   ~Typer();
 
   void Run();
@@ -47,14 +37,10 @@ class Typer {
   Graph* graph() const { return graph_; }
   Zone* zone() const { return graph()->zone(); }
   Isolate* isolate() const { return isolate_; }
-  Flags flags() const { return flags_; }
-  CompilationDependencies* dependencies() const { return dependencies_; }
   OperationTyper* operation_typer() { return &operation_typer_; }
 
   Isolate* const isolate_;
   Graph* const graph_;
-  Flags const flags_;
-  CompilationDependencies* const dependencies_;
   Decorator* decorator_;
   TypeCache const& cache_;
   OperationTyper operation_typer_;
@@ -70,8 +56,6 @@ class Typer {
   DISALLOW_COPY_AND_ASSIGN(Typer);
 };
 
-DEFINE_OPERATORS_FOR_FLAGS(Typer::Flags)
-
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8