[llvm] CallPromotionUtils: Correctly use IndexSize when determining the bit width of pointer offsets. (PR #119138)

[Owen Anderson via llvm-commits]

resistor wrote:

> Looks like this is my downstream commit [CTSRD-CHERI/llvm-project at fb9fa37](https://github.com/CTSRD-CHERI/llvm-project/commit/fb9fa3765325776d07c547b1b0668e6c749120f3), would be nice if you could add `Co-authored-by:`.

Sure. Is that just written into the commit message, or do I need to do something special to make git recognize it?


https://github.com/llvm/llvm-project/pull/119138