[llvm] [IPSCCP] Do not attempt `tryToReplaceWithConstant` if may break invariants (PR #102820)

[Antonio Frighetto via llvm-commits]

antoniofrighetto wrote:

> Propagating the constant isn't useful only for DCE, it can also enable other optimizations that now work on a global variable instead of on an opaque value.

Is this also the case when the called function may abort? From https://github.com/llvm/llvm-project/issues/102791, this looks idiosyncratic to me.

https://github.com/llvm/llvm-project/pull/102820