[turbofan] Pick remembered set action for write barrier.

src/compiler/ppc/code-generator-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.
 
 #include "src/compiler/code-generator.h"
 
 #include "src/ast/scopes.h"
 #include "src/compiler/code-generator-impl.h"
 #include "src/compiler/gap-resolver.h"
 #include "src/compiler/node-matchers.h"
@@ skipping 174 matching lines @@
         scratch1_(scratch1),
         mode_(mode) {}
 
   void Generate() final {
     if (mode_ > RecordWriteMode::kValueIsPointer) {
       __ JumpIfSmi(value_, exit());
     }
     __ CheckPageFlag(value_, scratch0_,
                      MemoryChunk::kPointersToHereAreInterestingMask, eq,
                      exit());
+    RememberedSetAction const remembered_set_action =
+        mode_ > RecordWriteMode::kValueIsMap ? EMIT_REMEMBERED_SET
+                                             : OMIT_REMEMBERED_SET;
     SaveFPRegsMode const save_fp_mode =
         frame()->DidAllocateDoubleRegisters() ? kSaveFPRegs : kDontSaveFPRegs;
     if (!frame()->needs_frame()) {
       // We need to save and restore lr if the frame was elided.
       __ mflr(scratch1_);
       __ Push(scratch1_);
     }
     RecordWriteStub stub(isolate(), object_, scratch0_, scratch1_,
-                         EMIT_REMEMBERED_SET, save_fp_mode);
+                         remembered_set_action, save_fp_mode);
     if (offset_.is(no_reg)) {
       __ addi(scratch1_, object_, Operand(offset_immediate_));
     } else {
       DCHECK_EQ(0, offset_immediate_);
       __ add(scratch1_, object_, offset_);
     }
     __ CallStub(&stub);
     if (!frame()->needs_frame()) {
       // We need to save and restore lr if the frame was elided.
       __ Pop(scratch1_);
@@ skipping 1690 matching lines @@
       padding_size -= v8::internal::Assembler::kInstrSize;
     }
   }
 }
 
 #undef __
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8