Reland "PPC/S390: Reland "[osr] Use the new OSR cache""

This is a reland of commit c575e8ae

Original change's description:
> PPC/S390: Reland "[osr] Use the new OSR cache"
>
> Port 91453880
>
> Original Commit Message:
>
>   This is a reland of commit 91da3883
>
>   Original change's description:
>   > Fixed: Use an X register for JumpIfCodeTIsMarkedForDeoptimization
>   > on arm64.
>   > Bug: v8:12161
>
> Change-Id: I6e63bd5995340bac32654ef12c52d25b496140e3
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3607997
> Reviewed-by: Junliang Yan <junyan@redhat.com>
> Commit-Queue: Milad Farazmand <mfarazma@redhat.com>
> Cr-Commit-Position: refs/heads/main@{#80194}

Change-Id: Id5e41c659a3c29a6d22c0393ad0003a24fa1ef5a
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3621273
Commit-Queue: Milad Farazmand <mfarazma@redhat.com>
Reviewed-by: Junliang Yan <junyan@redhat.com>
Cr-Commit-Position: refs/heads/main@{#80315}

src/baseline/ppc/baseline-assembler-ppc-inl.h

@@ -532,6 +532,32 @@ void BaselineAssembler::StoreTaggedFieldNoWriteBarrier(Register target,
   __ StoreTaggedField(value, FieldMemOperand(target, offset), r0);
 }
 
+void BaselineAssembler::TryLoadOptimizedOsrCode(Register scratch_and_result,
+                                                Register feedback_vector,
+                                                FeedbackSlot slot,
+                                                Label* on_result,
+                                                Label::Distance) {
+  Label fallthrough;
+  LoadTaggedPointerField(scratch_and_result, feedback_vector,
+                         FeedbackVector::OffsetOfElementAt(slot.ToInt()));
+  __ LoadWeakValue(scratch_and_result, scratch_and_result, &fallthrough);
+
+  // Is it marked_for_deoptimization? If yes, clear the slot.
+  {
+    ScratchRegisterScope temps(this);
+    Register scratch = temps.AcquireScratch();
+    __ TestCodeTIsMarkedForDeoptimization(scratch_and_result, scratch, r0);
+    __ beq(on_result, cr0);
+    __ mov(scratch, __ ClearedValue());
+    StoreTaggedFieldNoWriteBarrier(
+        feedback_vector, FeedbackVector::OffsetOfElementAt(slot.ToInt()),
+        scratch);
+  }
+
+  __ bind(&fallthrough);
+  Move(scratch_and_result, 0);
+}
+
 void BaselineAssembler::AddToInterruptBudgetAndJumpIfNotExceeded(
     int32_t weight, Label* skip_interrupt_label) {
   ASM_CODE_COMMENT(masm_);

src/baseline/s390/baseline-assembler-s390-inl.h

@@ -530,6 +530,32 @@ void BaselineAssembler::StoreTaggedFieldNoWriteBarrier(Register target,
   __ StoreTaggedField(value, FieldMemOperand(target, offset), r0);
 }
 
+void BaselineAssembler::TryLoadOptimizedOsrCode(Register scratch_and_result,
+                                                Register feedback_vector,
+                                                FeedbackSlot slot,
+                                                Label* on_result,
+                                                Label::Distance) {
+  Label fallthrough;
+  LoadTaggedPointerField(scratch_and_result, feedback_vector,
+                         FeedbackVector::OffsetOfElementAt(slot.ToInt()));
+  __ LoadWeakValue(scratch_and_result, scratch_and_result, &fallthrough);
+
+  // Is it marked_for_deoptimization? If yes, clear the slot.
+  {
+    ScratchRegisterScope temps(this);
+    Register scratch = temps.AcquireScratch();
+    __ TestCodeTIsMarkedForDeoptimization(scratch_and_result, scratch);
+    __ beq(on_result);
+    __ mov(scratch, __ ClearedValue());
+    StoreTaggedFieldNoWriteBarrier(
+        feedback_vector, FeedbackVector::OffsetOfElementAt(slot.ToInt()),
+        scratch);
+  }
+
+  __ bind(&fallthrough);
+  Move(scratch_and_result, 0);
+}
+
 void BaselineAssembler::AddToInterruptBudgetAndJumpIfNotExceeded(
     int32_t weight, Label* skip_interrupt_label) {
   ASM_CODE_COMMENT(masm_);

src/builtins/ppc/builtins-ppc.cc

@@ -79,16 +79,28 @@ void Generate_OSREntry(MacroAssembler* masm, Register entry_address,
   __ Ret();
 }
 
-void ResetBytecodeAgeAndOsrState(MacroAssembler* masm, Register bytecode_array,
-                                 Register scratch) {
-  // Reset the bytecode age and OSR state (optimized to a single write).
-  static_assert(BytecodeArray::kOsrStateAndBytecodeAgeAreContiguous32Bits);
+void ResetBytecodeAge(MacroAssembler* masm, Register bytecode_array,
+                      Register scratch) {
   STATIC_ASSERT(BytecodeArray::kNoAgeBytecodeAge == 0);
+  DCHECK(!AreAliased(bytecode_array, scratch));
   __ mov(scratch, Operand(0));
-  __ StoreU32(scratch,
-              FieldMemOperand(bytecode_array,
-                              BytecodeArray::kOsrUrgencyAndInstallTargetOffset),
-              r0);
+  __ StoreU16(
+      scratch,
+      FieldMemOperand(bytecode_array, BytecodeArray::kBytecodeAgeOffset), r0);
+}
+
+void ResetFeedbackVectorOsrUrgency(MacroAssembler* masm,
+                                   Register feedback_vector, Register scratch1,
+                                   Register scratch2) {
+  DCHECK(!AreAliased(feedback_vector, scratch1));
+  __ LoadU8(scratch1,
+            FieldMemOperand(feedback_vector, FeedbackVector::kOsrStateOffset),
+            scratch2);
+  __ andi(scratch1, scratch1,
+          Operand(FeedbackVector::MaybeHasOptimizedOsrCodeBit::kMask));
+  __ StoreU8(scratch1,
+             FieldMemOperand(feedback_vector, FeedbackVector::kOsrStateOffset),
+             scratch2);
 }
 
 // Restarts execution either at the current or next (in execution order)
@@ -216,8 +228,7 @@ void Generate_BaselineOrInterpreterEntry(MacroAssembler* masm,
 
   if (is_osr) {
     Register scratch = ip;
-    ResetBytecodeAgeAndOsrState(masm, kInterpreterBytecodeArrayRegister,
-                                scratch);
+    ResetBytecodeAge(masm, kInterpreterBytecodeArrayRegister, scratch);
     Generate_OSREntry(masm, code_obj, Code::kHeaderSize - kHeapObjectTag);
   } else {
     __ AddS64(code_obj, code_obj, Operand(Code::kHeaderSize - kHeapObjectTag));
@@ -391,37 +402,15 @@ enum class OsrSourceTier {
 };
 
 void OnStackReplacement(MacroAssembler* masm, OsrSourceTier source,
-                        Register current_loop_depth,
-                        Register encoded_current_bytecode_offset,
-                        Register osr_urgency_and_install_target) {
-  static constexpr Register scratch = r6;
-  DCHECK(!AreAliased(scratch, current_loop_depth,
-                     encoded_current_bytecode_offset,
-                     osr_urgency_and_install_target));
-  // OSR based on urgency, i.e. is the OSR urgency greater than the current
-  // loop depth?
-  Label try_osr;
-  STATIC_ASSERT(BytecodeArray::OsrUrgencyBits::kShift == 0);
-  Register urgency = scratch;
-  __ andi(urgency, osr_urgency_and_install_target,
-          Operand(BytecodeArray::OsrUrgencyBits::kMask));
-  __ CmpU64(urgency, current_loop_depth);
-  __ bgt(&try_osr);
-
-  // OSR based on the install target offset, i.e. does the current bytecode
-  // offset match the install target offset?
-  static constexpr int kMask = BytecodeArray::OsrInstallTargetBits::kMask;
-  Register install_target = osr_urgency_and_install_target;
-  __ andi(install_target, osr_urgency_and_install_target, Operand(kMask));
-  __ CmpU64(install_target, encoded_current_bytecode_offset);
-  __ beq(&try_osr);
-
-  // Neither urgency nor the install target triggered, return to the caller.
-  // Note: the return value must be nullptr or a valid Code object.
-  __ mov(r3, Operand(0));
-  __ Ret(0);
-
-  __ bind(&try_osr);
+                        Register maybe_target_code) {
+  Label jump_to_optimized_code;
+  {
+    // If maybe_target_code is not null, no need to call into runtime. A
+    // precondition here is: if maybe_target_code is a Code object, it must NOT
+    // be marked_for_deoptimization (callers must ensure this).
+    __ CmpSmiLiteral(maybe_target_code, Smi::zero(), r0);
+    __ bne(&jump_to_optimized_code);
+  }
 
   ASM_CODE_COMMENT(masm);
   {
@@ -430,12 +419,12 @@ void OnStackReplacement(MacroAssembler* masm, OsrSourceTier source,
   }
 
   // If the code object is null, just return to the caller.
-  Label skip;
   __ CmpSmiLiteral(r3, Smi::zero(), r0);
-  __ bne(&skip);
+  __ bne(&jump_to_optimized_code);
   __ Ret();
 
-  __ bind(&skip);
+  __ bind(&jump_to_optimized_code);
+  DCHECK_EQ(maybe_target_code, r3);  // Already in the right spot.
 
   if (source == OsrSourceTier::kInterpreter) {
     // Drop the handler frame that is be sitting on top of the actual
@@ -1190,16 +1179,12 @@ static void TailCallOptimizedCodeSlot(MacroAssembler* masm,
 
   // Check if the optimized code is marked for deopt. If it is, call the
   // runtime to clear it.
-  __ LoadTaggedPointerField(
-      scratch,
-      FieldMemOperand(optimized_code_entry, Code::kCodeDataContainerOffset),
-      r0);
-  __ LoadS32(
-      scratch,
-      FieldMemOperand(scratch, CodeDataContainer::kKindSpecificFlagsOffset),
-      r0);
-  __ TestBit(scratch, Code::kMarkedForDeoptimizationBit, r0);
-  __ bne(&heal_optimized_code_slot, cr0);
+  {
+    UseScratchRegisterScope temps(masm);
+    __ TestCodeTIsMarkedForDeoptimization(optimized_code_entry, temps.Acquire(),
+                                          scratch);
+    __ bne(&heal_optimized_code_slot, cr0);
+  }
 
   // Optimized code is good, get it into the closure and link the closure
   // into the optimized functions list, then tail call the optimized code.
@@ -1392,6 +1377,8 @@ void Builtins::Generate_BaselineOutOfLinePrologue(MacroAssembler* masm) {
                                              &has_optimized_code_or_state);
   }
 
+  { ResetFeedbackVectorOsrUrgency(masm, feedback_vector, r11, r0); }
+
   // Increment invocation count for the function.
   {
     Register invocation_count = r13;
@@ -1427,7 +1414,7 @@ void Builtins::Generate_BaselineOutOfLinePrologue(MacroAssembler* masm) {
     // the frame, so load it into a register.
     Register bytecodeArray = descriptor.GetRegisterParameter(
         BaselineOutOfLinePrologueDescriptor::kInterpreterBytecodeArray);
-    ResetBytecodeAgeAndOsrState(masm, bytecodeArray, r13);
+    ResetBytecodeAge(masm, bytecodeArray, r13);
 
     __ Push(argc, bytecodeArray);
 
@@ -1553,6 +1540,11 @@ void Builtins::Generate_InterpreterEntryTrampoline(MacroAssembler* masm) {
   LoadTieringStateAndJumpIfNeedsProcessing(
       masm, optimization_state, feedback_vector, &has_optimized_code_or_state);
 
+  {
+    UseScratchRegisterScope temps(masm);
+    ResetFeedbackVectorOsrUrgency(masm, feedback_vector, ip, r0);
+  }
+
   Label not_optimized;
   __ bind(&not_optimized);
 
@@ -1576,7 +1568,7 @@ void Builtins::Generate_InterpreterEntryTrampoline(MacroAssembler* masm) {
   FrameScope frame_scope(masm, StackFrame::MANUAL);
   __ PushStandardFrame(closure);
 
-  ResetBytecodeAgeAndOsrState(masm, kInterpreterBytecodeArrayRegister, r8);
+  ResetBytecodeAge(masm, kInterpreterBytecodeArrayRegister, r8);
 
   // Load initial bytecode offset.
   __ mov(kInterpreterBytecodeOffsetRegister,
@@ -2070,24 +2062,20 @@ void Builtins::Generate_NotifyDeoptimized(MacroAssembler* masm) {
 
 void Builtins::Generate_InterpreterOnStackReplacement(MacroAssembler* masm) {
   using D = InterpreterOnStackReplacementDescriptor;
-  STATIC_ASSERT(D::kParameterCount == 3);
+  STATIC_ASSERT(D::kParameterCount == 1);
   OnStackReplacement(masm, OsrSourceTier::kInterpreter,
-                     D::CurrentLoopDepthRegister(),
-                     D::EncodedCurrentBytecodeOffsetRegister(),
-                     D::OsrUrgencyAndInstallTargetRegister());
+                     D::MaybeTargetCodeRegister());
 }
 
 #if ENABLE_SPARKPLUG
 void Builtins::Generate_BaselineOnStackReplacement(MacroAssembler* masm) {
   using D = BaselineOnStackReplacementDescriptor;
-  STATIC_ASSERT(D::kParameterCount == 3);
+  STATIC_ASSERT(D::kParameterCount == 1);
 
   __ LoadU64(kContextRegister,
              MemOperand(fp, BaselineFrameConstants::kContextOffset), r0);
   OnStackReplacement(masm, OsrSourceTier::kBaseline,
-                     D::CurrentLoopDepthRegister(),
-                     D::EncodedCurrentBytecodeOffsetRegister(),
-                     D::OsrUrgencyAndInstallTargetRegister());
+                     D::MaybeTargetCodeRegister());
 }
 #endif
 

src/builtins/s390/builtins-s390.cc

@@ -83,16 +83,25 @@ void Generate_OSREntry(MacroAssembler* masm, Register entry_address,
   __ Ret();
 }
 
-void ResetBytecodeAgeAndOsrState(MacroAssembler* masm, Register bytecode_array,
-                                 Register scratch) {
-  // Reset the bytecode age and OSR state (optimized to a single write).
-  static_assert(BytecodeArray::kOsrStateAndBytecodeAgeAreContiguous32Bits);
+void ResetBytecodeAge(MacroAssembler* masm, Register bytecode_array,
+                      Register scratch) {
   STATIC_ASSERT(BytecodeArray::kNoAgeBytecodeAge == 0);
+  DCHECK(!AreAliased(bytecode_array, scratch));
   __ mov(r0, Operand(0));
-  __ StoreU32(r0,
-              FieldMemOperand(bytecode_array,
-                              BytecodeArray::kOsrUrgencyAndInstallTargetOffset),
-              scratch);
+  __ StoreU16(
+      r0, FieldMemOperand(bytecode_array, BytecodeArray::kBytecodeAgeOffset),
+      scratch);
+}
+
+void ResetFeedbackVectorOsrUrgency(MacroAssembler* masm,
+                                   Register feedback_vector, Register scratch) {
+  DCHECK(!AreAliased(feedback_vector, scratch));
+  __ LoadU8(scratch,
+            FieldMemOperand(feedback_vector, FeedbackVector::kOsrStateOffset));
+  __ AndP(scratch, scratch,
+          Operand(FeedbackVector::MaybeHasOptimizedOsrCodeBit::kMask));
+  __ StoreU8(scratch,
+             FieldMemOperand(feedback_vector, FeedbackVector::kOsrStateOffset));
 }
 
 // Restarts execution either at the current or next (in execution order)
@@ -218,7 +227,7 @@ void Generate_BaselineOrInterpreterEntry(MacroAssembler* masm,
   if (is_osr) {
     // TODO(pthier): Separate baseline Sparkplug from TF arming and don't
     // disarm Sparkplug here.
-    ResetBytecodeAgeAndOsrState(masm, kInterpreterBytecodeArrayRegister, r1);
+    ResetBytecodeAge(masm, kInterpreterBytecodeArrayRegister, r1);
     Generate_OSREntry(masm, code_obj, Code::kHeaderSize - kHeapObjectTag);
   } else {
     __ AddS64(code_obj, code_obj, Operand(Code::kHeaderSize - kHeapObjectTag));
@@ -256,37 +265,15 @@ enum class OsrSourceTier {
 };
 
 void OnStackReplacement(MacroAssembler* masm, OsrSourceTier source,
-                        Register current_loop_depth,
-                        Register encoded_current_bytecode_offset,
-                        Register osr_urgency_and_install_target) {
-  static constexpr Register scratch = r5;
-  DCHECK(!AreAliased(scratch, current_loop_depth,
-                     encoded_current_bytecode_offset,
-                     osr_urgency_and_install_target));
-  // OSR based on urgency, i.e. is the OSR urgency greater than the current
-  // loop depth?
-  Label try_osr;
-  STATIC_ASSERT(BytecodeArray::OsrUrgencyBits::kShift == 0);
-  Register urgency = scratch;
-  __ AndP(urgency, osr_urgency_and_install_target,
-          Operand(BytecodeArray::OsrUrgencyBits::kMask));
-  __ CmpU64(urgency, current_loop_depth);
-  __ bgt(&try_osr);
-
-  // OSR based on the install target offset, i.e. does the current bytecode
-  // offset match the install target offset?
-  static constexpr int kMask = BytecodeArray::OsrInstallTargetBits::kMask;
-  Register install_target = osr_urgency_and_install_target;
-  __ AndP(install_target, osr_urgency_and_install_target, Operand(kMask));
-  __ CmpU64(install_target, encoded_current_bytecode_offset);
-  __ beq(&try_osr);
-
-  // Neither urgency nor the install target triggered, return to the caller.
-  // Note: the return value must be nullptr or a valid Code object.
-  __ mov(r2, Operand(0));
-  __ Ret(0);
-
-  __ bind(&try_osr);
+                        Register maybe_target_code) {
+  Label jump_to_optimized_code;
+  {
+    // If maybe_target_code is not null, no need to call into runtime. A
+    // precondition here is: if maybe_target_code is a Code object, it must NOT
+    // be marked_for_deoptimization (callers must ensure this).
+    __ CmpSmiLiteral(maybe_target_code, Smi::zero(), r0);
+    __ bne(&jump_to_optimized_code);
+  }
 
   ASM_CODE_COMMENT(masm);
   {
@@ -295,12 +282,12 @@ void OnStackReplacement(MacroAssembler* masm, OsrSourceTier source,
   }
 
   // If the code object is null, just return to the caller.
-  Label jump_to_returned_code;
   __ CmpSmiLiteral(r2, Smi::zero(), r0);
-  __ bne(&jump_to_returned_code);
+  __ bne(&jump_to_optimized_code);
   __ Ret();
 
-  __ bind(&jump_to_returned_code);
+  __ bind(&jump_to_optimized_code);
+  DCHECK_EQ(maybe_target_code, r2);  // Already in the right spot.
 
   if (source == OsrSourceTier::kInterpreter) {
     // Drop the handler frame that is be sitting on top of the actual
@@ -1221,13 +1208,10 @@ static void TailCallOptimizedCodeSlot(MacroAssembler* masm,
 
   // Check if the optimized code is marked for deopt. If it is, call the
   // runtime to clear it.
-  __ LoadTaggedPointerField(
-      scratch,
-      FieldMemOperand(optimized_code_entry, Code::kCodeDataContainerOffset));
-  __ LoadS32(scratch, FieldMemOperand(
-                        scratch, CodeDataContainer::kKindSpecificFlagsOffset));
-  __ TestBit(scratch, Code::kMarkedForDeoptimizationBit, r0);
-  __ bne(&heal_optimized_code_slot);
+  {
+    __ TestCodeTIsMarkedForDeoptimization(optimized_code_entry, scratch);
+    __ bne(&heal_optimized_code_slot);
+  }
 
   // Optimized code is good, get it into the closure and link the closure
   // into the optimized functions list, then tail call the optimized code.
@@ -1421,6 +1405,11 @@ void Builtins::Generate_BaselineOutOfLinePrologue(MacroAssembler* masm) {
                                              &has_optimized_code_or_state);
   }
 
+  {
+    UseScratchRegisterScope temps(masm);
+    ResetFeedbackVectorOsrUrgency(masm, feedback_vector, r1);
+  }
+
   // Increment invocation count for the function.
   {
     Register invocation_count = r1;
@@ -1454,7 +1443,7 @@ void Builtins::Generate_BaselineOutOfLinePrologue(MacroAssembler* masm) {
     // the frame, so load it into a register.
     Register bytecodeArray = descriptor.GetRegisterParameter(
         BaselineOutOfLinePrologueDescriptor::kInterpreterBytecodeArray);
-    ResetBytecodeAgeAndOsrState(masm, bytecodeArray, r1);
+    ResetBytecodeAge(masm, bytecodeArray, r1);
 
     __ Push(argc, bytecodeArray);
 
@@ -1581,6 +1570,11 @@ void Builtins::Generate_InterpreterEntryTrampoline(MacroAssembler* masm) {
   LoadTieringStateAndJumpIfNeedsProcessing(
       masm, optimization_state, feedback_vector, &has_optimized_code_or_state);
 
+  {
+    UseScratchRegisterScope temps(masm);
+    ResetFeedbackVectorOsrUrgency(masm, feedback_vector, r1);
+  }
+
   Label not_optimized;
   __ bind(&not_optimized);
 
@@ -1598,7 +1592,7 @@ void Builtins::Generate_InterpreterEntryTrampoline(MacroAssembler* masm) {
   FrameScope frame_scope(masm, StackFrame::MANUAL);
   __ PushStandardFrame(closure);
 
-  ResetBytecodeAgeAndOsrState(masm, kInterpreterBytecodeArrayRegister, r1);
+  ResetBytecodeAge(masm, kInterpreterBytecodeArrayRegister, r1);
 
   // Load the initial bytecode offset.
   __ mov(kInterpreterBytecodeOffsetRegister,
@@ -3859,24 +3853,20 @@ void Builtins::Generate_DeoptimizationEntry_Lazy(MacroAssembler* masm) {
 
 void Builtins::Generate_InterpreterOnStackReplacement(MacroAssembler* masm) {
   using D = InterpreterOnStackReplacementDescriptor;
-  STATIC_ASSERT(D::kParameterCount == 3);
+  STATIC_ASSERT(D::kParameterCount == 1);
   OnStackReplacement(masm, OsrSourceTier::kInterpreter,
-                     D::CurrentLoopDepthRegister(),
-                     D::EncodedCurrentBytecodeOffsetRegister(),
-                     D::OsrUrgencyAndInstallTargetRegister());
+                     D::MaybeTargetCodeRegister());
 }
 
 #if ENABLE_SPARKPLUG
 void Builtins::Generate_BaselineOnStackReplacement(MacroAssembler* masm) {
   using D = BaselineOnStackReplacementDescriptor;
-  STATIC_ASSERT(D::kParameterCount == 3);
+  STATIC_ASSERT(D::kParameterCount == 1);
 
   __ LoadU64(kContextRegister,
          MemOperand(fp, BaselineFrameConstants::kContextOffset));
   OnStackReplacement(masm, OsrSourceTier::kBaseline,
-                     D::CurrentLoopDepthRegister(),
-                     D::EncodedCurrentBytecodeOffsetRegister(),
-                     D::OsrUrgencyAndInstallTargetRegister());
+                     D::MaybeTargetCodeRegister());
 }
 #endif
 

src/codegen/ppc/macro-assembler-ppc.cc

@@ -297,6 +297,24 @@ void TurboAssembler::Drop(Register count, Register scratch) {
   add(sp, sp, scratch);
 }
 
+void MacroAssembler::TestCodeTIsMarkedForDeoptimization(Register codet,
+                                                        Register scratch1,
+                                                        Register scratch2) {
+  LoadTaggedPointerField(scratch1,
+                         FieldMemOperand(codet, Code::kCodeDataContainerOffset),
+                         scratch2);
+  LoadS32(
+      scratch1,
+      FieldMemOperand(scratch1, CodeDataContainer::kKindSpecificFlagsOffset),
+      scratch2);
+  TestBit(scratch1, Code::kMarkedForDeoptimizationBit, scratch2);
+}
+
+Operand MacroAssembler::ClearedValue() const {
+  return Operand(
+      static_cast<int32_t>(HeapObjectReference::ClearedValue(isolate()).ptr()));
+}
+
 void TurboAssembler::Call(Label* target) { b(target, SetLK); }
 
 void TurboAssembler::Push(Handle<HeapObject> handle) {

src/codegen/ppc/macro-assembler-ppc.h

@@ -1361,6 +1361,10 @@ class V8_EXPORT_PRIVATE MacroAssembler : public TurboAssembler {
     DecodeField<Field>(reg, reg, rc);
   }
 
+  void TestCodeTIsMarkedForDeoptimization(Register codet, Register scratch1,
+                                          Register scratch2);
+  Operand ClearedValue() const;
+
  private:
   static const int kSmiShift = kSmiTagSize + kSmiShiftSize;
 

src/codegen/s390/macro-assembler-s390.cc

@@ -495,6 +495,20 @@ void TurboAssembler::Drop(Register count, Register scratch) {
   AddS64(sp, sp, scratch);
 }
 
+void MacroAssembler::TestCodeTIsMarkedForDeoptimization(Register codet,
+                                                        Register scratch) {
+  LoadTaggedPointerField(
+      scratch, FieldMemOperand(codet, Code::kCodeDataContainerOffset));
+  LoadS32(scratch, FieldMemOperand(
+                       scratch, CodeDataContainer::kKindSpecificFlagsOffset));
+  TestBit(scratch, Code::kMarkedForDeoptimizationBit, scratch);
+}
+
+Operand MacroAssembler::ClearedValue() const {
+  return Operand(
+      static_cast<int32_t>(HeapObjectReference::ClearedValue(isolate()).ptr()));
+}
+
 void TurboAssembler::Call(Label* target) { b(r14, target); }
 
 void TurboAssembler::Push(Handle<HeapObject> handle) {

src/codegen/s390/macro-assembler-s390.h

@@ -1773,6 +1773,9 @@ class V8_EXPORT_PRIVATE MacroAssembler : public TurboAssembler {
       RememberedSetAction remembered_set_action = RememberedSetAction::kEmit,
       SmiCheck smi_check = SmiCheck::kInline);
 
+  void TestCodeTIsMarkedForDeoptimization(Register codet, Register scratch);
+  Operand ClearedValue() const;
+
  private:
   static const int kSmiShift = kSmiTagSize + kSmiShiftSize;
   // Helper functions for generating invokes.