[llvm] [Delinearization] Extract outer array dimensions using global object size (PR #175158)

[Sjoerd Meijer via llvm-commits]

sjoerdmeijer wrote:

Thanks again for the suggestion, @nikic , @kasuga-fj.
This now looks at the global object size to determine the outer dimension, and is thus not relying on any type information anymore. 

https://github.com/llvm/llvm-project/pull/175158