[flang-commits] [flang] [flang] Create TBAA subtree for COMMON block variables. (PR #153918)

[Slava Zakharin via flang-commits]

vzakhari wrote:

Hi Tom, I would like to discuss the way to identify a variable as belonging to a COMMON block.  I check for the linkage in this patch, but I do not think it is a solid solution.

I can think of a bit flag on `[hl]fir.declare` or an attribute referring to the COMMON block's symbol name.  I wonder if you have better ideas.

https://github.com/llvm/llvm-project/pull/153918