[turbofan] Support variable size argument popping in TF-generated functions

src/compiler/code-generator.h

 // Copyright 2014 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_COMPILER_CODE_GENERATOR_H_
 #define V8_COMPILER_CODE_GENERATOR_H_
 
 #include "src/compiler/gap-resolver.h"
 #include "src/compiler/instruction.h"
 #include "src/compiler/unwinding-info-writer.h"
@@ skipping 111 matching lines @@
   CodeGenResult AssembleDeoptimizerCall(int deoptimization_id,
                                         Deoptimizer::BailoutType bailout_type,
                                         SourcePosition pos);
 
   // Generates an architecture-specific, descriptor-specific prologue
   // to set up a stack frame.
   void AssembleConstructFrame();
 
   // Generates an architecture-specific, descriptor-specific return sequence
   // to tear down a stack frame.
-  void AssembleReturn();
+  void AssembleReturn(InstructionOperand* pop);
 
   void AssembleDeconstructFrame();
 
   // Generates code to manipulate the stack in preparation for a tail call.
   void AssemblePrepareTailCall();
 
   // Generates code to pop current frame if it is an arguments adaptor frame.
   void AssemblePopArgumentsAdaptorFrame(Register args_reg, Register scratch1,
                                         Register scratch2, Register scratch3);
 
@@ skipping 137 matching lines @@
   OutOfLineCode* ools_;
   int osr_pc_offset_;
   SourcePositionTableBuilder source_position_table_builder_;
 };
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_COMPILER_CODE_GENERATOR_H