[riscv64][compiler] Keep WriteBarrier Smi check on the main code path

Port: d3d4a896
Bug: v8:11420
Change-Id: I995bb6f9e4f0d62d2e048fbae0d17747c301db4d
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2894036
Commit-Queue: Brice Dobry <brice.dobry@futurewei.com>
Reviewed-by: Brice Dobry <brice.dobry@futurewei.com>
Cr-Commit-Position: refs/heads/master@{#74555}

src/compiler/backend/riscv64/code-generator-riscv64.cc

@@ -157,9 +157,6 @@ class OutOfLineRecordWrite final : public OutOfLineCode {
         zone_(gen->zone()) {}
 
   void Generate() final {
-    if (mode_ > RecordWriteMode::kValueIsPointer) {
-      __ JumpIfSmi(value_, exit());
-    }
     __ CheckPageFlag(value_, scratch0_,
                      MemoryChunk::kPointersToHereAreInterestingMask, eq,
                      exit());
@@ -824,6 +821,9 @@ CodeGenerator::CodeGenResult CodeGenerator::AssembleArchInstruction(
                                                    DetermineStubCallMode());
       __ Add64(kScratchReg, object, index);
       __ Sd(value, MemOperand(kScratchReg));
+      if (mode > RecordWriteMode::kValueIsPointer) {
+        __ JumpIfSmi(value, ool->exit());
+      }
       __ CheckPageFlag(object, scratch0,
                        MemoryChunk::kPointersFromHereAreInterestingMask, ne,
                        ool->entry());