[clang] [llvm] [DirectX] Implement Shader Flags Analysis for ResMayNotAlias (PR #131070)

[Finn Plummer via cfe-commits]

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inbelic wrote:

Sure, although I would maybe argue that setting the module flag with a comment makes it more clear which shader flag we are interested in testing here.

Just a suggestion though 

https://github.com/llvm/llvm-project/pull/131070