llvm-project

f20640b5 - [X86] PromoteMaskArithmetic - use similar code for LHS/RHS trunc pattern. NFC. (#157426)

[X86] PromoteMaskArithmetic - use similar code for LHS/RHS trunc pattern. NFC. (#157426) Make it more obvious that LHS/RHS truncation patterns are the same. Noticed while working on #157425