llvm-project

c4281fd5 - [Support][ValueTraking] Improve KnownFPClass for fadd. Handle infinity signs (#190559)

[Support][ValueTraking] Improve KnownFPClass for fadd. Handle infinity signs (#190559) Improve KnownFPClass reasoning for fadd: - Refine NaN handling for infinities by checking opposite-sign cases: - `-inf` + `+inf` --> `nan` - `+inf` + `-inf` --> `nan` - `+inf` + `+inf` --> `+inf` - `-inf` + `-inf` --> `-inf` - Introduce `cannotBeOrderedLessEqZero` as pair to `cannotBeOrderedGreaterEqZero`.