[riscv64]Fix test-atomic-load-store-codegen failed

Change-Id: I5b3001cebcf97a239c259af7fc4ddc889c9a84a2
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3108947
Commit-Queue: Ji Qiu <qiuji@iscas.ac.cn>
Reviewed-by: Ji Qiu <qiuji@iscas.ac.cn>
Cr-Commit-Position: refs/heads/main@{#76402}

src/compiler/backend/riscv64/instruction-selector-riscv64.cc

@@ -2465,6 +2465,32 @@ void InstructionSelector::VisitWord64AtomicLoad(Node* node) {
     case MachineRepresentation::kWord64:
       opcode = kRiscvWord64AtomicLoadUint64;
       break;
+#ifdef V8_COMPRESS_POINTERS
+    case MachineRepresentation::kTaggedSigned:
+      opcode = kRiscv64LdDecompressTaggedSigned;
+      break;
+    case MachineRepresentation::kTaggedPointer:
+      opcode = kRiscv64LdDecompressTaggedPointer;
+      break;
+    case MachineRepresentation::kTagged:
+      opcode = kRiscv64LdDecompressAnyTagged;
+      break;
+#else
+    case MachineRepresentation::kTaggedSigned:   // Fall through.
+    case MachineRepresentation::kTaggedPointer:  // Fall through.
+    case MachineRepresentation::kTagged:
+      if (kTaggedSize == 8) {
+        opcode = kRiscvWord64AtomicLoadUint64;
+      } else {
+        opcode = kAtomicLoadWord32;
+      }
+      break;
+#endif
+    case MachineRepresentation::kCompressedPointer:  // Fall through.
+    case MachineRepresentation::kCompressed:
+      DCHECK(COMPRESS_POINTERS_BOOL);
+      opcode = kAtomicLoadWord32;
+      break;
     default:
       UNREACHABLE();
   }
@@ -2488,6 +2514,16 @@ void InstructionSelector::VisitWord64AtomicStore(Node* node) {
     case MachineRepresentation::kWord64:
       opcode = kRiscvWord64AtomicStoreWord64;
       break;
+    case MachineRepresentation::kTaggedSigned:   // Fall through.
+    case MachineRepresentation::kTaggedPointer:  // Fall through.
+    case MachineRepresentation::kTagged:
+      opcode = kRiscvWord64AtomicStoreWord64;
+      break;
+    case MachineRepresentation::kCompressedPointer:  // Fall through.
+    case MachineRepresentation::kCompressed:
+      CHECK(COMPRESS_POINTERS_BOOL);
+      opcode = kAtomicStoreWord32;
+      break;
     default:
       UNREACHABLE();
   }