[turbofan] Added --csa-trap-on-node option that helps debugging graph verification issues.

src/code-stub-assembler.h

 // Copyright 2016 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef V8_CODE_STUB_ASSEMBLER_H_
 #define V8_CODE_STUB_ASSEMBLER_H_
 
 #include <functional>
 
 #include "src/compiler/code-assembler.h"
@@ skipping 35 matching lines @@
 
 // Provides JavaScript-specific "macro-assembler" functionality on top of the
 // CodeAssembler. By factoring the JavaScript-isms out of the CodeAssembler,
 // it's possible to add JavaScript-specific useful CodeAssembler "macros"
 // without modifying files in the compiler directory (and requiring a review
 // from a compiler directory OWNER).
 class V8_EXPORT_PRIVATE CodeStubAssembler : public compiler::CodeAssembler {
  public:
   typedef compiler::Node Node;
 
-  CodeStubAssembler(compiler::CodeAssemblerState* state)
-      : compiler::CodeAssembler(state) {}
+  CodeStubAssembler(compiler::CodeAssemblerState* state);
 
   enum AllocationFlag : uint8_t {
     kNone = 0,
     kDoubleAlignment = 1,
     kPretenured = 1 << 1,
     kAllowLargeObjectAllocation = 1 << 2,
   };
 
   typedef base::Flags<AllocationFlag> AllocationFlags;
 
@@ skipping 1048 matching lines @@
 
   Node* TryToIntptr(Node* key, Label* miss);
 
   void BranchIfPrototypesHaveNoElements(Node* receiver_map,
                                         Label* definitely_no_elements,
                                         Label* possibly_elements);
 
  private:
   friend class CodeStubArguments;
 
+  void HandleBreakOnNode();
+
   Node* AllocateRawAligned(Node* size_in_bytes, AllocationFlags flags,
                            Node* top_address, Node* limit_address);
   Node* AllocateRawUnaligned(Node* size_in_bytes, AllocationFlags flags,
                              Node* top_adddress, Node* limit_address);
   // Allocate and return a JSArray of given total size in bytes with header
   // fields initialized.
   Node* AllocateUninitializedJSArray(ElementsKind kind, Node* array_map,
                                      Node* length, Node* allocation_site,
                                      Node* size_in_bytes);
 
@@ skipping 72 matching lines @@
   }
 #else
 #define CSA_SLOW_ASSERT(csa, x) ((void)0)
 #endif
 
 DEFINE_OPERATORS_FOR_FLAGS(CodeStubAssembler::AllocationFlags);
 
 }  // namespace internal
 }  // namespace v8
 #endif  // V8_CODE_STUB_ASSEMBLER_H_