[llvm] [RISCV] Add Stackmap/Statepoint/Patchpoint support with targets (PR #77337)

[Wang Pengcheng via llvm-commits]

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@@ -1523,9 +1523,12 @@ unsigned RISCVInstrInfo::getInstSizeInBytes(const MachineInstr &MI) const {
   case TargetOpcode::PATCHPOINT:
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wangpc-pp wrote:

The title says `Stackmap/Statepoint/Patchpoint`, but we don't support them all here?

https://github.com/llvm/llvm-project/pull/77337