[clang] Fixing array-to-pointer decay induced issue with conversion of the multidimentional arrays in C language. (PR #159896)

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earnol wrote:

@AaronBallman Please check this PR and associated discussion https://github.com/llvm/llvm-project/issues/159603.
Summary of the goal here is not have an error (warning is ok) when multidimentional array being cast to the pointer of the same base type.

https://github.com/llvm/llvm-project/pull/159896