diff --git a/llvm/test/CodeGen/LoongArch/ir-instruction/mul.ll b/llvm/test/CodeGen/LoongArch/ir-instruction/mul.ll
--- a/llvm/test/CodeGen/LoongArch/ir-instruction/mul.ll
+++ b/llvm/test/CodeGen/LoongArch/ir-instruction/mul.ll
@@ -1163,3 +1163,151 @@
   %b = mul i64 %a, 4112
   ret i64 %b
 }
+
+define signext i32 @mul_i32_768(i32 %a) {
+; LA32-LABEL: mul_i32_768:
+; LA32:       # %bb.0:
+; LA32-NEXT:    ori $a1, $zero, 768
+; LA32-NEXT:    mul.w $a0, $a0, $a1
+; LA32-NEXT:    ret
+;
+; LA64-LABEL: mul_i32_768:
+; LA64:       # %bb.0:
+; LA64-NEXT:    ori $a1, $zero, 768
+; LA64-NEXT:    mul.d $a0, $a0, $a1
+; LA64-NEXT:    addi.w $a0, $a0, 0
+; LA64-NEXT:    ret
+  %b = mul i32 %a, 768
+  ret i32 %b
+}
+
+define signext i32 @mul_i32_1280(i32 %a) {
+; LA32-LABEL: mul_i32_1280:
+; LA32:       # %bb.0:
+; LA32-NEXT:    ori $a1, $zero, 1280
+; LA32-NEXT:    mul.w $a0, $a0, $a1
+; LA32-NEXT:    ret
+;
+; LA64-LABEL: mul_i32_1280:
+; LA64:       # %bb.0:
+; LA64-NEXT:    ori $a1, $zero, 1280
+; LA64-NEXT:    mul.d $a0, $a0, $a1
+; LA64-NEXT:    addi.w $a0, $a0, 0
+; LA64-NEXT:    ret
+  %b = mul i32 %a, 1280
+  ret i32 %b
+}
+
+define signext i32 @mul_i32_2304(i32 %a) {
+; LA32-LABEL: mul_i32_2304:
+; LA32:       # %bb.0:
+; LA32-NEXT:    ori $a1, $zero, 2304
+; LA32-NEXT:    mul.w $a0, $a0, $a1
+; LA32-NEXT:    ret
+;
+; LA64-LABEL: mul_i32_2304:
+; LA64:       # %bb.0:
+; LA64-NEXT:    ori $a1, $zero, 2304
+; LA64-NEXT:    mul.d $a0, $a0, $a1
+; LA64-NEXT:    addi.w $a0, $a0, 0
+; LA64-NEXT:    ret
+  %b = mul i32 %a, 2304
+  ret i32 %b
+}
+
+define signext i32 @mul_i32_4352(i32 %a) {
+; LA32-LABEL: mul_i32_4352:
+; LA32:       # %bb.0:
+; LA32-NEXT:    lu12i.w $a1, 1
+; LA32-NEXT:    ori $a1, $a1, 256
+; LA32-NEXT:    mul.w $a0, $a0, $a1
+; LA32-NEXT:    ret
+;
+; LA64-LABEL: mul_i32_4352:
+; LA64:       # %bb.0:
+; LA64-NEXT:    lu12i.w $a1, 1
+; LA64-NEXT:    ori $a1, $a1, 256
+; LA64-NEXT:    mul.d $a0, $a0, $a1
+; LA64-NEXT:    addi.w $a0, $a0, 0
+; LA64-NEXT:    ret
+  %b = mul i32 %a, 4352
+  ret i32 %b
+}
+
+define i64 @mul_i64_768(i64 %a) {
+; LA32-LABEL: mul_i64_768:
+; LA32:       # %bb.0:
+; LA32-NEXT:    ori $a2, $zero, 768
+; LA32-NEXT:    mul.w $a1, $a1, $a2
+; LA32-NEXT:    mulh.wu $a3, $a0, $a2
+; LA32-NEXT:    add.w $a1, $a3, $a1
+; LA32-NEXT:    mul.w $a0, $a0, $a2
+; LA32-NEXT:    ret
+;
+; LA64-LABEL: mul_i64_768:
+; LA64:       # %bb.0:
+; LA64-NEXT:    ori $a1, $zero, 768
+; LA64-NEXT:    mul.d $a0, $a0, $a1
+; LA64-NEXT:    ret
+  %b = mul i64 %a, 768
+  ret i64 %b
+}
+
+define i64 @mul_i64_1280(i64 %a) {
+; LA32-LABEL: mul_i64_1280:
+; LA32:       # %bb.0:
+; LA32-NEXT:    ori $a2, $zero, 1280
+; LA32-NEXT:    mul.w $a1, $a1, $a2
+; LA32-NEXT:    mulh.wu $a3, $a0, $a2
+; LA32-NEXT:    add.w $a1, $a3, $a1
+; LA32-NEXT:    mul.w $a0, $a0, $a2
+; LA32-NEXT:    ret
+;
+; LA64-LABEL: mul_i64_1280:
+; LA64:       # %bb.0:
+; LA64-NEXT:    ori $a1, $zero, 1280
+; LA64-NEXT:    mul.d $a0, $a0, $a1
+; LA64-NEXT:    ret
+  %b = mul i64 %a, 1280
+  ret i64 %b
+}
+
+define i64 @mul_i64_2304(i64 %a) {
+; LA32-LABEL: mul_i64_2304:
+; LA32:       # %bb.0:
+; LA32-NEXT:    ori $a2, $zero, 2304
+; LA32-NEXT:    mul.w $a1, $a1, $a2
+; LA32-NEXT:    mulh.wu $a3, $a0, $a2
+; LA32-NEXT:    add.w $a1, $a3, $a1
+; LA32-NEXT:    mul.w $a0, $a0, $a2
+; LA32-NEXT:    ret
+;
+; LA64-LABEL: mul_i64_2304:
+; LA64:       # %bb.0:
+; LA64-NEXT:    ori $a1, $zero, 2304
+; LA64-NEXT:    mul.d $a0, $a0, $a1
+; LA64-NEXT:    ret
+  %b = mul i64 %a, 2304
+  ret i64 %b
+}
+
+define i64 @mul_i64_4352(i64 %a) {
+; LA32-LABEL: mul_i64_4352:
+; LA32:       # %bb.0:
+; LA32-NEXT:    lu12i.w $a2, 1
+; LA32-NEXT:    ori $a2, $a2, 256
+; LA32-NEXT:    mul.w $a1, $a1, $a2
+; LA32-NEXT:    mulh.wu $a3, $a0, $a2
+; LA32-NEXT:    add.w $a1, $a3, $a1
+; LA32-NEXT:    mul.w $a0, $a0, $a2
+; LA32-NEXT:    ret
+;
+; LA64-LABEL: mul_i64_4352:
+; LA64:       # %bb.0:
+; LA64-NEXT:    lu12i.w $a1, 1
+; LA64-NEXT:    ori $a1, $a1, 256
+; LA64-NEXT:    mul.d $a0, $a0, $a1
+; LA64-NEXT:    ret
+  %b = mul i64 %a, 4352
+  ret i64 %b
+}