[llvm] [DebugInfo][X86] Use merged DebugLoc in replaceBranchWithTailCall (PR #189509)

[David Blaikie via llvm-commits]

dwblaikie wrote:

Maybe you can add a slightly more complicated example that shows more clearly incorrect stepping? Because at least it doesn't seem immediately wrong to stop at a dominating location (like stopping at line 3 in your example doesn't suggest anything incorrect about the control flow of the program, does it? (doesn't show a contradiction where something is reachable when it shouldn't be, etc)

But I'm happy to punt opinions on this to @jmorse and @SLTozer 

https://github.com/llvm/llvm-project/pull/189509