[compiler-rt] Fix race in the implementation of __tsan_acquire() (PR #84923)

[Dave Clausen via llvm-commits]

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@@ -0,0 +1,46 @@
+// RUN: %clangxx_tsan -O1 %s -o %t && %run %t 2>&1 | FileCheck %s
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daveclausen wrote:

Done.

I also removed the CHECK and CHECK-NOT comment lines at the end of the file.

https://github.com/llvm/llvm-project/pull/84923