[llvm] [SDAG] Don't allow implicit trunc in getConstant() (PR #117558)

[Nikita Popov via llvm-commits]

nikic wrote:

@nathanchance I can't reproduce this on current main. Based on the backtrace, I think I already fixed this in https://github.com/llvm/llvm-project/commit/5322415f92fe44a9dac29c95da5ed434efbbba7e?

https://github.com/llvm/llvm-project/pull/117558