[llvm] [LoongArch] Use LSX for scalar FP rounding with explicit rounding mode (PR #114766)

[Yingchi Long via llvm-commits]

================
@@ -0,0 +1,123 @@
+; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py UTC_ARGS: --version 5
+; RUN: llc --mtriple=loongarch64 --mattr=+lsx < %s | FileCheck %s
+
+;; ceilf
+define float @ceil_f32(float %i) nounwind {
+; CHECK-LABEL: ceil_f32:
----------------
inclyc wrote:

what did we generate before this commit? `Expand`?

https://github.com/llvm/llvm-project/pull/114766