PPC: [generators] Store the resume mode in the generator object.

src/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 702 matching lines @@
   //  -- r5 : the resume mode (tagged)
   //  -- lr : return address
   // -----------------------------------
   __ AssertGeneratorObject(r4);
 
   // Store input value into generator object.
   __ StoreP(r3, FieldMemOperand(r4, JSGeneratorObject::kInputOffset), r0);
   __ RecordWriteField(r4, JSGeneratorObject::kInputOffset, r3, r6,
                       kLRHasNotBeenSaved, kDontSaveFPRegs);
 
+  // Store resume mode into generator object.
+  __ StoreP(r5, FieldMemOperand(r4, JSGeneratorObject::kResumeModeOffset), r0);
+
   // Load suspended function and context.
   __ LoadP(cp, FieldMemOperand(r4, JSGeneratorObject::kContextOffset));
   __ LoadP(r7, FieldMemOperand(r4, JSGeneratorObject::kFunctionOffset));
 
   // Flood function if we are stepping.
   Label skip_flooding;
   ExternalReference step_in_enabled =
       ExternalReference::debug_step_in_enabled_address(masm->isolate());
   __ mov(ip, Operand(step_in_enabled));
   __ lbz(ip, MemOperand(ip));
@@ skipping 60 matching lines @@
     __ SmiUntag(r6, SetRC);
     __ beq(&done_loop, cr0);
     __ mtctr(r6);
     __ bind(&loop);
     __ LoadPU(ip, MemOperand(r3, kPointerSize));
     __ Push(ip);
     __ bdnz(&loop);
     __ bind(&done_loop);
   }
 
-  // Push resume mode (consumed in continuation).
-  __ Push(r5);
-
   // Reset operand stack so we don't leak.
   __ LoadRoot(ip, Heap::kEmptyFixedArrayRootIndex);
   __ StoreP(ip, FieldMemOperand(r4, JSGeneratorObject::kOperandStackOffset),
             r0);
 
-  // Restore value.
-  __ LoadP(r3, FieldMemOperand(r4, JSGeneratorObject::kInputOffset));
-
   // Resume the generator function at the continuation.
   __ LoadP(r6, FieldMemOperand(r7, JSFunction::kSharedFunctionInfoOffset));
   __ LoadP(r6, FieldMemOperand(r6, SharedFunctionInfo::kCodeOffset));
   __ addi(r6, r6, Operand(Code::kHeaderSize - kHeapObjectTag));
   {
     ConstantPoolUnavailableScope constant_pool_unavailable(masm);
     if (FLAG_enable_embedded_constant_pool) {
       __ LoadConstantPoolPointerRegisterFromCodeTargetAddress(r6);
     }
     __ LoadP(r5, FieldMemOperand(r4, JSGeneratorObject::kContinuationOffset));
     __ SmiUntag(r5);
     __ add(r6, r6, r5);
     __ LoadSmiLiteral(r5, Smi::FromInt(JSGeneratorObject::kGeneratorExecuting));
     __ StoreP(r5, FieldMemOperand(r4, JSGeneratorObject::kContinuationOffset),
               r0);
+    __ mr(r3, r4);  // Continuation expects generator object in r3.
     __ Jump(r6);
   }
 }
 
 void Builtins::Generate_ConstructedNonConstructable(MacroAssembler* masm) {
   FrameAndConstantPoolScope scope(masm, StackFrame::INTERNAL);
   __ push(r4);
   __ CallRuntime(Runtime::kThrowConstructedNonConstructable);
 }
 
@@ skipping 1878 matching lines @@
     __ bkpt(0);
   }
 }
 
 
 #undef __
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_PPC