[clang] [CopyProf] Clang frontend and driver integration. (PR #225905)

[Snehasish Kumar via cfe-commits]

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@@ -0,0 +1,35 @@
+// Test that CopyProf instrumentation passes are invoked at -O0 and -O2,
+// and are not re-run during ThinLTO postlink backend compilation.
+
+// REQUIRES: x86-registered-target
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snehasish wrote:

The convention is to put this at the top of the file.

https://github.com/llvm/llvm-project/pull/225905