[turbofan] Remove dead kArchTailCallJSFunction.

src/compiler/s390/code-generator-s390.cc

 // Copyright 2015 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.
 
 #include "src/compiler/code-generator.h"
 
 #include "src/compilation-info.h"
 #include "src/compiler/code-generator-impl.h"
 #include "src/compiler/gap-resolver.h"
 #include "src/compiler/node-matchers.h"
@@ skipping 906 matching lines @@
                  FieldMemOperand(func, JSFunction::kContextOffset));
         __ CmpP(cp, kScratchReg);
         __ Assert(eq, kWrongFunctionContext);
       }
       __ LoadP(ip, FieldMemOperand(func, JSFunction::kCodeEntryOffset));
       __ Call(ip);
       RecordCallPosition(instr);
       frame_access_state()->ClearSPDelta();
       break;
     }
-    case kArchTailCallJSFunctionFromJSFunction:
-    case kArchTailCallJSFunction: {
+    case kArchTailCallJSFunctionFromJSFunction: {
       Register func = i.InputRegister(0);
       if (FLAG_debug_code) {
         // Check the function's context matches the context argument.
         __ LoadP(kScratchReg,
                  FieldMemOperand(func, JSFunction::kContextOffset));
         __ CmpP(cp, kScratchReg);
         __ Assert(eq, kWrongFunctionContext);
       }
-      if (opcode == kArchTailCallJSFunctionFromJSFunction) {
-        AssemblePopArgumentsAdaptorFrame(kJavaScriptCallArgCountRegister,
-                                         i.TempRegister(0), i.TempRegister(1),
-                                         i.TempRegister(2));
-      }
+      AssemblePopArgumentsAdaptorFrame(kJavaScriptCallArgCountRegister,
+                                       i.TempRegister(0), i.TempRegister(1),
+                                       i.TempRegister(2));
       __ LoadP(ip, FieldMemOperand(func, JSFunction::kCodeEntryOffset));
       __ Jump(ip);
       frame_access_state()->ClearSPDelta();
       frame_access_state()->SetFrameAccessToDefault();
       break;
     }
     case kArchPrepareCallCFunction: {
       int const num_parameters = MiscField::decode(instr->opcode());
       __ PrepareCallCFunction(num_parameters, kScratchReg);
       // Frame alignment requires using FP-relative frame addressing.
@@ skipping 1611 matching lines @@
       padding_size -= 2;
     }
   }
 }
 
 #undef __
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8