llvm-project

4f50ce24 - [FunctionAttrs] Don't infer noundef when return has nofpclass (#191822)

[FunctionAttrs] Don't infer noundef when return has nofpclass (#191822) - Fixes: #191338 nofpclass violations on a return produce poison. Poison returns marked noundef are UB. This turns off noundef inference when nofpclass attributes are present. --------- Co-authored-by: Shonie Caplan <shonie@genki.com> Co-authored-by: Yingwei Zheng <dtcxzyw@qq.com>