fixup! Update PROBED_STACKALLOC_DYN

Author: topperc

llvm/lib/Target/RISCV/RISCVISelLowering.cpp

@@ -24504,7 +24504,7 @@ RISCVTargetLowering::emitDynamicProbedAlloc(MachineInstr &MI,
   MachineFunction &MF = *MBB->getParent();
   MachineBasicBlock::iterator MBBI = MI.getIterator();
   DebugLoc DL = MBB->findDebugLoc(MBBI);
-  Register TargetReg = MI.getOperand(1).getReg();
+  Register TargetReg = MI.getOperand(0).getReg();
 
   const RISCVInstrInfo *TII = Subtarget.getInstrInfo();
   bool IsRV64 = Subtarget.is64Bit();

llvm/lib/Target/RISCV/RISCVInstrInfo.td

@@ -1463,9 +1463,9 @@ def PROBED_STACKALLOC_RVV : Pseudo<(outs GPR:$sp),
                                []>,
                                Sched<[]>;
 let usesCustomInserter = 1 in
-def PROBED_STACKALLOC_DYN : Pseudo<(outs GPR:$rd),
+def PROBED_STACKALLOC_DYN : Pseudo<(outs),
                                (ins GPR:$scratch),
-                               [(set GPR:$rd, (riscv_probed_alloca GPR:$scratch))]>,
+                               [(riscv_probed_alloca GPR:$scratch)]>,
                                Sched<[]>;
 }