diff --git a/llvm/lib/Target/LoongArch/LoongArchInstrInfo.td b/llvm/lib/Target/LoongArch/LoongArchInstrInfo.td
--- a/llvm/lib/Target/LoongArch/LoongArchInstrInfo.td
+++ b/llvm/lib/Target/LoongArch/LoongArchInstrInfo.td
@@ -816,6 +816,13 @@
 def : PatGprGpr<mulhu, MULH_WU>;
 def : PatGprGpr<rotr, ROTR_W>;
 def : PatGprImm<rotr, ROTRI_W, uimm5>;
+
+foreach Idx = 1...3 in {
+  defvar ShamtA = !mul(8, Idx);
+  defvar ShamtB = !mul(8, !sub(4, Idx));
+  def : Pat<(or (shl GPR:$rk, (i32 ShamtA)), (srl GPR:$rj, (i32 ShamtB))),
+            (BYTEPICK_W GPR:$rj, GPR:$rk, Idx)>;
+}
 } // Predicates = [IsLA32]
 
 let Predicates = [IsLA64] in {
@@ -851,6 +858,16 @@
 def : Pat<(i64 (mul (loongarch_bstrpick GPR:$rj, (i64 31), (i64 0)),
                     (loongarch_bstrpick GPR:$rk, (i64 31), (i64 0)))),
           (MULW_D_WU GPR:$rj, GPR:$rk)>;
+
+foreach Idx = 1...7 in {
+  defvar ShamtA = !mul(8, Idx);
+  defvar ShamtB = !mul(8, !sub(8, Idx));
+  def : Pat<(or (shl GPR:$rk, (i64 ShamtA)), (srl GPR:$rj, (i64 ShamtB))),
+            (BYTEPICK_D GPR:$rj, GPR:$rk, Idx)>;
+  def : Pat<(sext_inreg (or (shl GPR:$rj, (i64 ShamtA)),
+                            (srl GPR:$rk, (i64 ShamtB))), i32),
+            (BYTEPICK_W GPR:$rj, GPR:$rk, Idx)>;
+}
 } // Predicates = [IsLA64]
 
 def : PatGprGpr<and, AND>;
diff --git a/llvm/test/CodeGen/LoongArch/bytepick.ll b/llvm/test/CodeGen/LoongArch/bytepick.ll
--- a/llvm/test/CodeGen/LoongArch/bytepick.ll
+++ b/llvm/test/CodeGen/LoongArch/bytepick.ll
@@ -9,9 +9,7 @@
 define i32 @pick_i32_1(i32 %a, i32 %b) {
 ; LA32-LABEL: pick_i32_1:
 ; LA32:       # %bb.0:
-; LA32-NEXT:    slli.w $a0, $a0, 8
-; LA32-NEXT:    srli.w $a1, $a1, 24
-; LA32-NEXT:    or $a0, $a1, $a0
+; LA32-NEXT:    bytepick.w $a0, $a1, $a0, 1
 ; LA32-NEXT:    ret
 ;
 ; LA64-LABEL: pick_i32_1:
@@ -31,9 +29,7 @@
 define signext i32 @pick_i32_1_sext(i32 %a, i32 %b) {
 ; LA32-LABEL: pick_i32_1_sext:
 ; LA32:       # %bb.0:
-; LA32-NEXT:    slli.w $a0, $a0, 8
-; LA32-NEXT:    srli.w $a1, $a1, 24
-; LA32-NEXT:    or $a0, $a1, $a0
+; LA32-NEXT:    bytepick.w $a0, $a1, $a0, 1
 ; LA32-NEXT:    ret
 ;
 ; LA64-LABEL: pick_i32_1_sext:
@@ -54,9 +50,7 @@
 define i32 @pick_i32_2(i32 %a, i32 %b) {
 ; LA32-LABEL: pick_i32_2:
 ; LA32:       # %bb.0:
-; LA32-NEXT:    slli.w $a0, $a0, 16
-; LA32-NEXT:    srli.w $a1, $a1, 16
-; LA32-NEXT:    or $a0, $a1, $a0
+; LA32-NEXT:    bytepick.w $a0, $a1, $a0, 2
 ; LA32-NEXT:    ret
 ;
 ; LA64-LABEL: pick_i32_2:
@@ -76,9 +70,7 @@
 define signext i32 @pick_i32_2_sext(i32 %a, i32 %b) {
 ; LA32-LABEL: pick_i32_2_sext:
 ; LA32:       # %bb.0:
-; LA32-NEXT:    slli.w $a0, $a0, 16
-; LA32-NEXT:    srli.w $a1, $a1, 16
-; LA32-NEXT:    or $a0, $a1, $a0
+; LA32-NEXT:    bytepick.w $a0, $a1, $a0, 2
 ; LA32-NEXT:    ret
 ;
 ; LA64-LABEL: pick_i32_2_sext:
@@ -99,9 +91,7 @@
 define i32 @pick_i32_3(i32 %a, i32 %b) {
 ; LA32-LABEL: pick_i32_3:
 ; LA32:       # %bb.0:
-; LA32-NEXT:    slli.w $a0, $a0, 24
-; LA32-NEXT:    srli.w $a1, $a1, 8
-; LA32-NEXT:    or $a0, $a1, $a0
+; LA32-NEXT:    bytepick.w $a0, $a1, $a0, 3
 ; LA32-NEXT:    ret
 ;
 ; LA64-LABEL: pick_i32_3:
@@ -121,9 +111,7 @@
 define signext i32 @pick_i32_3_sext(i32 %a, i32 %b) {
 ; LA32-LABEL: pick_i32_3_sext:
 ; LA32:       # %bb.0:
-; LA32-NEXT:    slli.w $a0, $a0, 24
-; LA32-NEXT:    srli.w $a1, $a1, 8
-; LA32-NEXT:    or $a0, $a1, $a0
+; LA32-NEXT:    bytepick.w $a0, $a1, $a0, 3
 ; LA32-NEXT:    ret
 ;
 ; LA64-LABEL: pick_i32_3_sext:
@@ -144,20 +132,14 @@
 define i64 @pick_i64_1(i64 %a, i64 %b) {
 ; LA32-LABEL: pick_i64_1:
 ; LA32:       # %bb.0:
-; LA32-NEXT:    srli.w $a2, $a3, 24
-; LA32-NEXT:    slli.w $a3, $a0, 8
-; LA32-NEXT:    or $a2, $a2, $a3
-; LA32-NEXT:    srli.w $a0, $a0, 24
-; LA32-NEXT:    slli.w $a1, $a1, 8
-; LA32-NEXT:    or $a1, $a1, $a0
+; LA32-NEXT:    bytepick.w $a2, $a3, $a0, 1
+; LA32-NEXT:    bytepick.w $a1, $a0, $a1, 1
 ; LA32-NEXT:    move $a0, $a2
 ; LA32-NEXT:    ret
 ;
 ; LA64-LABEL: pick_i64_1:
 ; LA64:       # %bb.0:
-; LA64-NEXT:    slli.d $a0, $a0, 8
-; LA64-NEXT:    srli.d $a1, $a1, 56
-; LA64-NEXT:    or $a0, $a1, $a0
+; LA64-NEXT:    bytepick.d $a0, $a1, $a0, 1
 ; LA64-NEXT:    ret
   %1 = lshr i64 %b, 56
   %2 = shl i64 %a, 8
@@ -170,20 +152,14 @@
 define i64 @pick_i64_2(i64 %a, i64 %b) {
 ; LA32-LABEL: pick_i64_2:
 ; LA32:       # %bb.0:
-; LA32-NEXT:    srli.w $a2, $a3, 16
-; LA32-NEXT:    slli.w $a3, $a0, 16
-; LA32-NEXT:    or $a2, $a2, $a3
-; LA32-NEXT:    srli.w $a0, $a0, 16
-; LA32-NEXT:    slli.w $a1, $a1, 16
-; LA32-NEXT:    or $a1, $a1, $a0
+; LA32-NEXT:    bytepick.w $a2, $a3, $a0, 2
+; LA32-NEXT:    bytepick.w $a1, $a0, $a1, 2
 ; LA32-NEXT:    move $a0, $a2
 ; LA32-NEXT:    ret
 ;
 ; LA64-LABEL: pick_i64_2:
 ; LA64:       # %bb.0:
-; LA64-NEXT:    slli.d $a0, $a0, 16
-; LA64-NEXT:    srli.d $a1, $a1, 48
-; LA64-NEXT:    or $a0, $a1, $a0
+; LA64-NEXT:    bytepick.d $a0, $a1, $a0, 2
 ; LA64-NEXT:    ret
   %1 = lshr i64 %b, 48
   %2 = shl i64 %a, 16
@@ -196,20 +172,14 @@
 define i64 @pick_i64_3(i64 %a, i64 %b) {
 ; LA32-LABEL: pick_i64_3:
 ; LA32:       # %bb.0:
-; LA32-NEXT:    srli.w $a2, $a3, 8
-; LA32-NEXT:    slli.w $a3, $a0, 24
-; LA32-NEXT:    or $a2, $a2, $a3
-; LA32-NEXT:    srli.w $a0, $a0, 8
-; LA32-NEXT:    slli.w $a1, $a1, 24
-; LA32-NEXT:    or $a1, $a1, $a0
+; LA32-NEXT:    bytepick.w $a2, $a3, $a0, 3
+; LA32-NEXT:    bytepick.w $a1, $a0, $a1, 3
 ; LA32-NEXT:    move $a0, $a2
 ; LA32-NEXT:    ret
 ;
 ; LA64-LABEL: pick_i64_3:
 ; LA64:       # %bb.0:
-; LA64-NEXT:    slli.d $a0, $a0, 24
-; LA64-NEXT:    srli.d $a1, $a1, 40
-; LA64-NEXT:    or $a0, $a1, $a0
+; LA64-NEXT:    bytepick.d $a0, $a1, $a0, 3
 ; LA64-NEXT:    ret
   %1 = lshr i64 %b, 40
   %2 = shl i64 %a, 24
@@ -228,9 +198,7 @@
 ;
 ; LA64-LABEL: pick_i64_4:
 ; LA64:       # %bb.0:
-; LA64-NEXT:    slli.d $a0, $a0, 32
-; LA64-NEXT:    srli.d $a1, $a1, 32
-; LA64-NEXT:    or $a0, $a1, $a0
+; LA64-NEXT:    bytepick.d $a0, $a1, $a0, 4
 ; LA64-NEXT:    ret
   %1 = lshr i64 %b, 32
   %2 = shl i64 %a, 32
@@ -243,20 +211,14 @@
 define i64 @pick_i64_5(i64 %a, i64 %b) {
 ; LA32-LABEL: pick_i64_5:
 ; LA32:       # %bb.0:
-; LA32-NEXT:    srli.w $a1, $a2, 24
-; LA32-NEXT:    slli.w $a2, $a3, 8
-; LA32-NEXT:    or $a2, $a1, $a2
-; LA32-NEXT:    slli.w $a0, $a0, 8
-; LA32-NEXT:    srli.w $a1, $a3, 24
-; LA32-NEXT:    or $a1, $a1, $a0
+; LA32-NEXT:    bytepick.w $a2, $a2, $a3, 1
+; LA32-NEXT:    bytepick.w $a1, $a3, $a0, 1
 ; LA32-NEXT:    move $a0, $a2
 ; LA32-NEXT:    ret
 ;
 ; LA64-LABEL: pick_i64_5:
 ; LA64:       # %bb.0:
-; LA64-NEXT:    slli.d $a0, $a0, 40
-; LA64-NEXT:    srli.d $a1, $a1, 24
-; LA64-NEXT:    or $a0, $a1, $a0
+; LA64-NEXT:    bytepick.d $a0, $a1, $a0, 5
 ; LA64-NEXT:    ret
   %1 = lshr i64 %b, 24
   %2 = shl i64 %a,40
@@ -269,20 +231,14 @@
 define i64 @pick_i64_6(i64 %a, i64 %b) {
 ; LA32-LABEL: pick_i64_6:
 ; LA32:       # %bb.0:
-; LA32-NEXT:    srli.w $a1, $a2, 16
-; LA32-NEXT:    slli.w $a2, $a3, 16
-; LA32-NEXT:    or $a2, $a1, $a2
-; LA32-NEXT:    slli.w $a0, $a0, 16
-; LA32-NEXT:    srli.w $a1, $a3, 16
-; LA32-NEXT:    or $a1, $a1, $a0
+; LA32-NEXT:    bytepick.w $a2, $a2, $a3, 2
+; LA32-NEXT:    bytepick.w $a1, $a3, $a0, 2
 ; LA32-NEXT:    move $a0, $a2
 ; LA32-NEXT:    ret
 ;
 ; LA64-LABEL: pick_i64_6:
 ; LA64:       # %bb.0:
-; LA64-NEXT:    slli.d $a0, $a0, 48
-; LA64-NEXT:    srli.d $a1, $a1, 16
-; LA64-NEXT:    or $a0, $a1, $a0
+; LA64-NEXT:    bytepick.d $a0, $a1, $a0, 6
 ; LA64-NEXT:    ret
   %1 = lshr i64 %b, 16
   %2 = shl i64 %a, 48
@@ -295,20 +251,14 @@
 define i64 @pick_i64_7(i64 %a, i64 %b) {
 ; LA32-LABEL: pick_i64_7:
 ; LA32:       # %bb.0:
-; LA32-NEXT:    srli.w $a1, $a2, 8
-; LA32-NEXT:    slli.w $a2, $a3, 24
-; LA32-NEXT:    or $a2, $a1, $a2
-; LA32-NEXT:    slli.w $a0, $a0, 24
-; LA32-NEXT:    srli.w $a1, $a3, 8
-; LA32-NEXT:    or $a1, $a1, $a0
+; LA32-NEXT:    bytepick.w $a2, $a2, $a3, 3
+; LA32-NEXT:    bytepick.w $a1, $a3, $a0, 3
 ; LA32-NEXT:    move $a0, $a2
 ; LA32-NEXT:    ret
 ;
 ; LA64-LABEL: pick_i64_7:
 ; LA64:       # %bb.0:
-; LA64-NEXT:    slli.d $a0, $a0, 56
-; LA64-NEXT:    srli.d $a1, $a1, 8
-; LA64-NEXT:    or $a0, $a1, $a0
+; LA64-NEXT:    bytepick.d $a0, $a1, $a0, 7
 ; LA64-NEXT:    ret
   %1 = lshr i64 %b, 8
   %2 = shl i64 %a, 56