[riscv64][sparkplug] Clobber accumulator in StaGlobal

Port: 732f394c
Change-Id: I1a7a8dd7870a71df9f0e7c30392cd9a23b5cab3e
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3126820
Commit-Queue: Brice Dobry <brice.dobry@futurewei.com>
Reviewed-by: Brice Dobry <brice.dobry@futurewei.com>
Cr-Commit-Position: refs/heads/main@{#76630}

src/baseline/riscv64/baseline-assembler-riscv64-inl.h

@@ -511,6 +511,11 @@ void BaselineAssembler::EmitReturn(MacroAssembler* masm) {
 
 #undef __
 
+inline void EnsureAccumulatorPreservedScope::AssertEqualToAccumulator(
+    Register reg) {
+  assembler_->masm()->Assert(eq, AbortReason::kUnexpectedValue, reg,
+                             Operand(kInterpreterAccumulatorRegister));
+}
 }  // namespace baseline
 }  // namespace internal
 }  // namespace v8