================
@@ -12367,8 +12368,17 @@ bool IntExprEvaluator::VisitBuiltinCallExpr(const
CallExpr *E,
BuiltinOp != Builtin::BI__lzcnt &&
BuiltinOp != Builtin::BI__lzcnt64;
- if (ZeroIsUndefined && !Val)
- return Error(E);
+ if (!Val) {
----------------
nickdesaulniers wrote:
```c++
if (BuiltinOp == Builtin::BI__builtin_clzg)
return Success(Val.countl_zero(), E);
return Success(Val.countr_zero(), E);
```
https://github.com/llvm/llvm-project/pull/86577
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