[clang] Do not print locations in anonymous tag names. (PR #159592)

[Reid Kleckner via cfe-commits]

rnk wrote:

I should add, I agree with the goal of removing the full filepaths from the type names. They are usually quite long, and in my experience, they usually clutter profiling and debugger tool output. There could be significant debug string size savings from this change as well.

https://github.com/llvm/llvm-project/pull/159592