[turbofan] Implement tail calls with differing stack parameter counts

src/compiler/code-generator.h

Index: src/compiler/code-generator.h
diff --git a/src/compiler/code-generator.h b/src/compiler/code-generator.h
index d1545d10b9ce95652ca20c455a3ce077296b7d6f..e1ca0949816e698efe8e0d00e962bd8dfaff166b 100644
--- a/src/compiler/code-generator.h
+++ b/src/compiler/code-generator.h
@@ -93,8 +93,9 @@ class CodeGenerator final : public GapResolver::Assembler {
   // to tear down a stack frame.
   void AssembleReturn();
 
-  // Generates code to deconstruct a the caller's frame, including arguments.
-  void AssembleDeconstructActivationRecord();
+  // Generates code to deconstruct a the caller's frame and prepare for a tail
+  // call, including swizzling parameters passed through to the tail call.
+  void AssembleTailCallSetup(Instruction* instr);
 
   // ===========================================================================
   // ============== Architecture-specific gap resolver methods. ================
@@ -187,7 +188,6 @@ class CodeGenerator final : public GapResolver::Assembler {
   JumpTable* jump_tables_;
   OutOfLineCode* ools_;
   int osr_pc_offset_;
-  bool needs_frame_;
 };
 
 }  // namespace compiler