[llvm] [RISCV][GISEL] Legalize G_VAARG through expansion. (PR #73065)

[Matt Arsenault via llvm-commits]

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@@ -288,6 +295,25 @@ bool RISCVLegalizerInfo::legalizeShlAshrLshr(
   return true;
 }
 
+bool RISCVLegalizerInfo::legalizePtrMask(MachineInstr &MI,
+                                         MachineIRBuilder &MIRBuilder,
+                                         GISelChangeObserver &Observer) const {
+  assert(MI.getOpcode() == TargetOpcode::G_PTRMASK);
+
+  MachineRegisterInfo &MRI = *MIRBuilder.getMRI();
+  Register Tmp1 =
+      MRI.createGenericVirtualRegister(MRI.getType(MI.getOperand(2).getReg()));
+  Register Tmp2 =
+      MRI.createGenericVirtualRegister(MRI.getType(MI.getOperand(2).getReg()));
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arsenm wrote:

Can hide the createGenericVirtualRegister class in the MIRBuilder functions 

https://github.com/llvm/llvm-project/pull/73065