[clang] [LoongArch][Clang] Add tests for #110834 (PR #114509)

[Xi Ruoyao via cfe-commits]

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+// REQUIRES: loongarch-registered-target
+// RUN: %clang_cc1 %s -fsyntax-only -triple loongarch64-linux -target-feature +lasx
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xry111 wrote:

Done.

https://github.com/llvm/llvm-project/pull/114509