[llvm] [TableGen] Fix assertion when initializing a bit from a !cond expression (PR #197224)

[Pengcheng Wang via llvm-commits]

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@@ -2732,6 +2732,8 @@ std::string CondOpInit::getAsString() const {
 }
 
 const Init *CondOpInit::getBit(unsigned Bit) const {
+  if (getType() == BitRecTy::get(getRecordKeeper()))
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wangpc-pp wrote:

You may use `isa<BitRecTy>`?

https://github.com/llvm/llvm-project/pull/197224