[llvm] [RISCV][CFI] add function epilogue cfi information (PR #110234)

[Craig Topper via llvm-commits]

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@@ -1576,6 +1653,31 @@ void RISCVFrameLowering::emitCalleeSavedRVVPrologCFI(
   }
 }
 
+void RISCVFrameLowering::emitCalleeSavedRVVEpilogCFI(
+    MachineBasicBlock &MBB, MachineBasicBlock::iterator MI) const {
+  MachineFunction *MF = MBB.getParent();
+  const MachineFrameInfo &MFI = MF->getFrameInfo();
+  const RISCVRegisterInfo *RI = STI.getRegisterInfo();
+  const TargetInstrInfo &TII = *STI.getInstrInfo();
+  DebugLoc DL = MBB.findDebugLoc(MI);
+
+  const auto &RVVCSI = getRVVCalleeSavedInfo(*MF, MFI.getCalleeSavedInfo());
+  if (RVVCSI.empty())
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topperc wrote:

Is this `if` necessary. The loop should see the vector is empty and do nothing.

https://github.com/llvm/llvm-project/pull/110234