diff --git a/llvm/lib/Target/RISCV/RISCVInstrInfoB.td b/llvm/lib/Target/RISCV/RISCVInstrInfoB.td
--- a/llvm/lib/Target/RISCV/RISCVInstrInfoB.td
+++ b/llvm/lib/Target/RISCV/RISCVInstrInfoB.td
@@ -836,7 +836,7 @@
           (SLLIUW GPR:$rs1, uimm5:$shamt)>;
 def : Pat<(shl (and GPR:$rs1, 0xFFFFFFFF), uimm5:$shamt),
           (SLLIUW GPR:$rs1, uimm5:$shamt)>;
-def : Pat<(add GPR:$rs1, (and GPR:$rs2, (i64 0xFFFFFFFF))),
+def : Pat<(add (and GPR:$rs1, (i64 0xFFFFFFFF)), GPR:$rs2),
           (ADDUW GPR:$rs1, GPR:$rs2)>;
 }
 
diff --git a/llvm/test/CodeGen/RISCV/rv64Zba.ll b/llvm/test/CodeGen/RISCV/rv64Zba.ll
--- a/llvm/test/CodeGen/RISCV/rv64Zba.ll
+++ b/llvm/test/CodeGen/RISCV/rv64Zba.ll
@@ -72,12 +72,12 @@
 ;
 ; RV64IB-LABEL: adduw:
 ; RV64IB:       # %bb.0:
-; RV64IB-NEXT:    add.uw a0, a0, a1
+; RV64IB-NEXT:    add.uw a0, a1, a0
 ; RV64IB-NEXT:    ret
 ;
 ; RV64IBA-LABEL: adduw:
 ; RV64IBA:       # %bb.0:
-; RV64IBA-NEXT:    add.uw a0, a0, a1
+; RV64IBA-NEXT:    add.uw a0, a1, a0
 ; RV64IBA-NEXT:    ret
   %and = and i64 %b, 4294967295
   %add = add i64 %and, %a
@@ -95,13 +95,13 @@
 ;
 ; RV64IB-LABEL: adduw_2:
 ; RV64IB:       # %bb.0:
-; RV64IB-NEXT:    add.uw a0, a1, a0
+; RV64IB-NEXT:    add.uw a0, a0, a1
 ; RV64IB-NEXT:    lb a0, 0(a0)
 ; RV64IB-NEXT:    ret
 ;
 ; RV64IBA-LABEL: adduw_2:
 ; RV64IBA:       # %bb.0:
-; RV64IBA-NEXT:    add.uw a0, a1, a0
+; RV64IBA-NEXT:    add.uw a0, a0, a1
 ; RV64IBA-NEXT:    lb a0, 0(a0)
 ; RV64IBA-NEXT:    ret
   %3 = zext i32 %0 to i64