[clang] [Preprocessor] Do not expand macros if the input is already preprocessed (PR #137665)

[Jacob Lambert via cfe-commits]

Juan Manuel Martinez =?utf-8?q?Caama=C3=B1o?= <juamarti at amd.com>,
Juan Manuel Martinez =?utf-8?q?Caama=C3=B1o?= <juamarti at amd.com>
Message-ID:
In-Reply-To: <llvm.org/llvm/llvm-project/pull/137665 at github.com>


lamb-j wrote:

@cor3ntin @AaronBallman any thoughts on this PR?

Aiming to land soon if there are no other objections

https://github.com/llvm/llvm-project/pull/137665