[llvm] [LoongArch] Fix codegen for ISD::ROTR (PR #100292)

[Lu Weining via llvm-commits]

SixWeining wrote:

> sext i64 (trunc i64 (rotr i64 %x, i64 %y) to i32) to i32

Do you mean:
sext i32 (trunc i64 (rotr i64 %x, i64 %y) to i32) to i64

https://github.com/llvm/llvm-project/pull/100292