================
@@ -20,9 +21,13 @@ elif clang_bolt_mode == "perf":
 else:
     assert 0, "Unsupported CLANG_BOLT_MODE variable"
 
-config.clang = perf_wrapper + os.path.realpath(
+clang_nowrapper = os.path.realpath(
     lit.util.which(clang_binary, config.clang_tools_dir)
 ).replace("\\", "/")
+config.clang = perf_wrapper + clang_nowrapper
----------------
aaupov wrote:

Just for my understanding: we're keeping perf_wrapper set if CLANG_BOLT=perf. 
However we pass perf_wrapper in front of cmake command in 
`clang/utils/perf-training/llvm-support/build.test` – do we end up with nested 
perf invocations, or do we strip perf_wrapper from clang in this case?

https://github.com/llvm/llvm-project/pull/119117
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