[PATCH] D139311: InstCombine: Match pattern that appears in clang's __builtin_isnormal

[Jay Foad via Phabricator via llvm-commits]

foad added inline comments.


================
Comment at: llvm/lib/IR/Instructions.cpp:4098
+CmpInst::Predicate CmpInst::getOrderedPredicate(Predicate Pred) {
+  switch (Pred) {
+  case FCmpInst::FCMP_OEQ:
----------------
This whole function is just `return Pred & 7;`. See the definition of CmpInst::Predicate. The floating point predicates are carefully numbered to make exactly this kind of thing possible.


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  https://reviews.llvm.org/D139311/new/

https://reviews.llvm.org/D139311