PPC/s390: [cleanup] combine 3 ResumeGenerator stubs into one

src/builtins/s390/builtins-s390.cc

 // 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.
 
 #if V8_TARGET_ARCH_S390
 
 #include "src/codegen.h"
 #include "src/debug/debug.h"
 #include "src/deoptimizer.h"
 #include "src/full-codegen/full-codegen.h"
@@ skipping 635 matching lines @@
   Generate_JSConstructStubHelper(masm, false, false, false);
 }
 
 void Builtins::Generate_JSBuiltinsConstructStubForDerived(
     MacroAssembler* masm) {
   Generate_JSConstructStubHelper(masm, false, false, true);
 }
 
 // static
 void Builtins::Generate_ResumeGeneratorTrampoline(MacroAssembler* masm) {
-  Generate_ResumeGenerator(masm, ResumeGeneratorType::kGenerator);
-}
-
-// static
-void Builtins::Generate_ResumeAsyncGeneratorTrampoline(MacroAssembler* masm) {
-  Generate_ResumeGenerator(masm, ResumeGeneratorType::kAsyncGenerator);
-}
-
-// static
-void Builtins::Generate_ResumeAwaitedAsyncGeneratorTrampoline(
-    MacroAssembler* masm) {
-  Generate_ResumeGenerator(masm, ResumeGeneratorType::kAwaitedAsyncGenerator);
-}
-
-void Builtins::Generate_ResumeGenerator(MacroAssembler* masm,
-                                        ResumeGeneratorType type) {
   // ----------- S t a t e -------------
   //  -- r2 : the value to pass to the generator
   //  -- r3 : the JSGeneratorObject to resume
   //  -- r4 : the resume mode (tagged)
+  //  -- r5 : the SuspendFlags of the earlier suspend call (tagged)
   //  -- lr : return address
   // -----------------------------------
-  if (type == ResumeGeneratorType::kGenerator) {
-    __ AssertGeneratorObject(r3);
-  } else {
-    __ AssertAsyncGeneratorObject(r3);
-  }
+  __ SmiUntag(r5);
+  __ AssertGeneratorObject(r3, r5);
 
   // Store input value into generator object.
-  int offset = type == ResumeGeneratorType::kAwaitedAsyncGenerator
-                   ? JSAsyncGeneratorObject::kAwaitInputOrDebugPosOffset
-                   : JSGeneratorObject::kInputOrDebugPosOffset;
-  __ StoreP(r2, FieldMemOperand(r3, offset), r0);
-  __ RecordWriteField(r3, offset, r2, r5, kLRHasNotBeenSaved, kDontSaveFPRegs);
+  Label async_await, done_store_input;
+
+  __ And(r5, r5, Operand(static_cast<int>(SuspendFlags::kAsyncGeneratorAwait)));
+  __ CmpP(r5, Operand(static_cast<int>(SuspendFlags::kAsyncGeneratorAwait)));
+  __ beq(&async_await);
+
+  __ StoreP(r2, FieldMemOperand(r3, JSGeneratorObject::kInputOrDebugPosOffset),
+            r0);
+  __ RecordWriteField(r3, JSGeneratorObject::kInputOrDebugPosOffset, r2, r5,
+                      kLRHasNotBeenSaved, kDontSaveFPRegs);
+  __ b(&done_store_input);
+
+  __ bind(&async_await);
+  __ StoreP(
+      r2,
+      FieldMemOperand(r3, JSAsyncGeneratorObject::kAwaitInputOrDebugPosOffset),
+      r0);
+  __ RecordWriteField(r3, JSAsyncGeneratorObject::kAwaitInputOrDebugPosOffset,
+                      r2, r5, kLRHasNotBeenSaved, kDontSaveFPRegs);
+  __ b(&done_store_input);
+
+  __ bind(&done_store_input);
+  // `r5` no longer holds SuspendFlags
 
   // Store resume mode into generator object.
   __ StoreP(r4, FieldMemOperand(r3, JSGeneratorObject::kResumeModeOffset));
 
   // Load suspended function and context.
   __ LoadP(r6, FieldMemOperand(r3, JSGeneratorObject::kFunctionOffset));
   __ LoadP(cp, FieldMemOperand(r6, JSFunction::kContextOffset));
 
   // Flood function if we are stepping.
   Label prepare_step_in_if_stepping, prepare_step_in_suspended_generator;
@@ skipping 2388 matching lines @@
   // Now jump to the instructions of the returned code object.
   __ Jump(ip);
 }
 
 #undef __
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_S390