Index: lib/Target/RISCV/RISCVInstrInfo.h
===================================================================
--- lib/Target/RISCV/RISCVInstrInfo.h
+++ lib/Target/RISCV/RISCVInstrInfo.h
@@ -79,6 +79,8 @@
 
   bool isBranchOffsetInRange(unsigned BranchOpc,
                              int64_t BrOffset) const override;
+
+  bool isAsCheapAsAMove(const MachineInstr &MI) const override;
 };
 }
 #endif
Index: lib/Target/RISCV/RISCVInstrInfo.cpp
===================================================================
--- lib/Target/RISCV/RISCVInstrInfo.cpp
+++ lib/Target/RISCV/RISCVInstrInfo.cpp
@@ -448,3 +448,17 @@
   }
   }
 }
+
+bool RISCVInstrInfo::isAsCheapAsAMove(const MachineInstr &MI) const {
+  const unsigned Opcode = MI.getOpcode();
+  switch(Opcode) {
+    default:
+      return false;
+    case RISCV::ADDI:
+    case RISCV::ORI:
+    case RISCV::XORI:
+      return (MI.getOperand(1).isReg() && MI.getOperand(1).getReg() == RISCV::X0);
+  }
+  return MI.isAsCheapAsAMove();
+}
+
Index: lib/Target/RISCV/RISCVInstrInfo.td
===================================================================
--- lib/Target/RISCV/RISCVInstrInfo.td
+++ lib/Target/RISCV/RISCVInstrInfo.td
@@ -307,7 +307,8 @@
 // Instructions
 //===----------------------------------------------------------------------===//
 
-let hasSideEffects = 0, isReMaterializable = 1, mayLoad = 0, mayStore = 0 in {
+let hasSideEffects = 0, mayLoad = 0, mayStore = 0 in {
+let isReMaterializable = 1 in
 def LUI : RVInstU<OPC_LUI, (outs GPR:$rd), (ins uimm20_lui:$imm20),
                   "lui", "$rd, $imm20">;
 
@@ -343,13 +344,18 @@
 
 // ADDI isn't always rematerializable, but isReMaterializable will be used as
 // a hint which is verified in isReallyTriviallyReMaterializable.
-let isReMaterializable = 1 in
+let isReMaterializable = 1, isAsCheapAsAMove = 1 in
 def ADDI  : ALU_ri<0b000, "addi">;
 
 def SLTI  : ALU_ri<0b010, "slti">;
 def SLTIU : ALU_ri<0b011, "sltiu">;
+
+let isReMaterializable = 1, isAsCheapAsAMove = 1 in
 def XORI  : ALU_ri<0b100, "xori">;
+
+let isReMaterializable = 1, isAsCheapAsAMove = 1 in
 def ORI   : ALU_ri<0b110, "ori">;
+
 def ANDI  : ALU_ri<0b111, "andi">;
 
 def SLLI : Shift_ri<0, 0b001, "slli">;