[llvm] [CodeGen] Add nneg and disjoint flags (PR #86650)

[Thorsten Schütt via llvm-commits]

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@@ -1562,9 +1562,15 @@ bool IRTranslator::translateCast(unsigned Opcode, const User &U,
   if (U.getType()->getScalarType()->isBFloatTy() ||
       U.getOperand(0)->getType()->getScalarType()->isBFloatTy())
     return false;
+
+  uint32_t Flags = 0;
+  if (isa<Instruction>(U)) {
+    const Instruction &I = cast<Instruction>(U);
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tschuett wrote:

It is copy and paste. From the `isa` above, we know that it is an instruction.

https://github.com/llvm/llvm-project/pull/86650