[clang] [compiler-rt] [llvm] [PGO][HIP] HSA-introspection device profile drain + GPU PGO tests (PR #203056)

[Larry Meadows via cfe-commits]

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+#!/usr/bin/env bash
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lfmeadow wrote:

This is all fixed, it uses normal lit. Also added a couple of CI tests that will run upstream.

https://github.com/llvm/llvm-project/pull/203056