[llvm] [llvm][RISCV] Set ScalableVector stack id in proper place (PR #117862)

[Elizaveta Noskova via llvm-commits]

================
@@ -1610,6 +1610,8 @@ bool RISCVFrameLowering::assignCalleeSavedSpillSlots(
         int FrameIdx = MFI.CreateFixedSpillStackObject(Size, Offset);
         assert(FrameIdx < 0);
         CS.setFrameIdx(FrameIdx);
+        if (RISCVRegisterInfo::isRVVRegClass(RC))
----------------
enoskova-sc wrote:

addressed

https://github.com/llvm/llvm-project/pull/117862