[llvm] [JumpThreading] Don't thread into blocks with convergent operations (PR #213870)

[Antonio Frighetto via llvm-commits]

antoniofrighetto wrote:

> is this documented anywhere and i just missed it ?

The target triple is documented in the LangRef (https://llvm.org/docs/LangRef.html#target-triple). I was going to suggest the opt tool guide too (https://llvm.org/docs/CommandGuide/opt.html), but, for some reason, it seems it has no mention of the `-mtriple` option (unlike llc). I'll clarify this. 

https://github.com/llvm/llvm-project/pull/213870