[clang] [Clang] Handle deduced auto types within AtomicType (PR #197874)

[Erich Keane via cfe-commits]

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+// RUN: %clang_cc1 -triple x86_64-pc-linux-gnu -emit-llvm -o - %s > /dev/null
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erichkeane wrote:

Good catch shafik.  @mkovacevic99 : Please make sure you add check lines to this, and have it go through FileCheck like other tests!  Else we'll have to revert this patch.

https://github.com/llvm/llvm-project/pull/197874