[clang] [llvm] [test] Avoid writing to a potentially write-protected dir (PR #89242)

[Chris B via cfe-commits]

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@@ -1,5 +1,5 @@
 
-// RUN: %clang_cc1 -finclude-default-header -triple dxil-pc-shadermodel6.6-library %s -fnative-half-type -emit-llvm -disable-llvm-passes -verify -verify-ignore-unexpected
+// RUN: %clang_cc1 -finclude-default-header -triple dxil-pc-shadermodel6.6-library %s -fnative-half-type -emit-llvm -disable-llvm-passes -verify -verify-ignore-unexpected -o /dev/null
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llvm-beanz wrote:

Unless I'm mistaken the clang `-verify` option should prevent writing outputs since it is just running the verifier.

That said, this test shouldn't be passing `-emit-llvm -disable-llvm-passes` because we aren't actually checking the IR.

https://github.com/llvm/llvm-project/pull/89242