[llvm] [IR] PossiblyExactOperator -> PossiblyExactInst (NFC) (PR #72501)

[Nikita Popov via llvm-commits]

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@@ -314,7 +314,9 @@ void Instruction::setHasNoSignedWrap(bool b) {
 }
 
 void Instruction::setIsExact(bool b) {
-  cast<PossiblyExactOperator>(this)->setIsExact(b);
+  assert(isa<PossiblyExactInst>(this) && "Instruction must support exact flag");
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nikic wrote:

Hm, the change to the structure here was was intentional, because the old approach seemed somewhat convoluted to me, now that PossiblyExactInst is a direct descendant of Instruction. This matches the implementation of PossiblyNonNegInst now (admittedly, also added by me).

https://github.com/llvm/llvm-project/pull/72501