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

src/builtins/ppc/builtins-ppc.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_PPC
 
 #include "src/codegen.h"
 #include "src/debug/debug.h"
 #include "src/deoptimizer.h"
 #include "src/full-codegen/full-codegen.h"
@@ skipping 637 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 -------------
   //  -- r3 : the value to pass to the generator
   //  -- r4 : the JSGeneratorObject to resume
   //  -- r5 : the resume mode (tagged)
+  //  -- r6 : the SuspendFlags of the earlier suspend call (tagged)
   //  -- lr : return address
   // -----------------------------------
-  if (type == ResumeGeneratorType::kGenerator) {
-    __ AssertGeneratorObject(r4);
-  } else {
-    __ AssertAsyncGeneratorObject(r4);
-  }
+  __ SmiUntag(r6);
+  __ AssertGeneratorObject(r4, r6);
 
   // Store input value into generator object.
-  int offset = type == ResumeGeneratorType::kAwaitedAsyncGenerator
-                   ? JSAsyncGeneratorObject::kAwaitInputOrDebugPosOffset
-                   : JSGeneratorObject::kInputOrDebugPosOffset;
-  __ StoreP(r3, FieldMemOperand(r4, offset), r0);
-  __ RecordWriteField(r4, offset, r3, r6, kLRHasNotBeenSaved, kDontSaveFPRegs);
+  Label async_await, done_store_input;
+
+  __ And(r6, r6, Operand(static_cast<int>(SuspendFlags::kAsyncGeneratorAwait)));
+  __ cmpi(r6, Operand(static_cast<int>(SuspendFlags::kAsyncGeneratorAwait)));
+  __ beq(&async_await);
+
+  __ StoreP(r3, FieldMemOperand(r4, JSGeneratorObject::kInputOrDebugPosOffset),
+            r0);
+  __ RecordWriteField(r4, JSGeneratorObject::kInputOrDebugPosOffset, r3, r6,
+                      kLRHasNotBeenSaved, kDontSaveFPRegs);
+  __ b(&done_store_input);
+
+  __ bind(&async_await);
+  __ StoreP(
+      r3,
+      FieldMemOperand(r4, JSAsyncGeneratorObject::kAwaitInputOrDebugPosOffset),
+      r0);
+  __ RecordWriteField(r4, JSAsyncGeneratorObject::kAwaitInputOrDebugPosOffset,
+                      r3, r6, kLRHasNotBeenSaved, kDontSaveFPRegs);
+  __ b(&done_store_input);
+
+  __ bind(&done_store_input);
+  // `r6` no longer holds SuspendFlags
 
   // Store resume mode into generator object.
   __ StoreP(r5, FieldMemOperand(r4, JSGeneratorObject::kResumeModeOffset), r0);
 
   // Load suspended function and context.
   __ LoadP(r7, FieldMemOperand(r4, JSGeneratorObject::kFunctionOffset));
   __ LoadP(cp, FieldMemOperand(r7, JSFunction::kContextOffset));
 
   // Flood function if we are stepping.
   Label prepare_step_in_if_stepping, prepare_step_in_suspended_generator;
@@ skipping 2371 matching lines @@
   }
   // Now jump to the instructions of the returned code object.
   __ Jump(r11);
 }
 
 #undef __
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_PPC