Index: lib/Target/RISCV/RISCVInstrInfoC.td
===================================================================
--- lib/Target/RISCV/RISCVInstrInfoC.td
+++ lib/Target/RISCV/RISCVInstrInfoC.td
@@ -478,7 +478,7 @@
 def C_MV : RVInst16CR<0b1000, 0b10, (outs GPRNoX0:$rs1), (ins GPRNoX0:$rs2),
                       "c.mv", "$rs1, $rs2">;
 
-let rs1 = 0, rs2 = 0, hasSideEffects = 0, mayLoad = 0, mayStore = 0 in
+let rs1 = 0, rs2 = 0, hasSideEffects = 1, mayLoad = 0, mayStore = 0 in
 def C_EBREAK : RVInst16CR<0b1001, 0b10, (outs), (ins), "c.ebreak", "">;
 
 let hasSideEffects = 0, mayLoad = 0, mayStore = 0,