================
@@ -4238,7 +4238,8 @@ static Value *emitPointerArithmetic(CodeGenFunction &CGF,
else
elemTy = CGF.ConvertTypeForMem(elementType);
- if (CGF.getLangOpts().PointerOverflowDefined)
+ if (CGF.getLangOpts().PointerOverflowDefined ||
+ CGF.isUnderlyingBasePointerConstantNull(pointerOperand))
----------------
dtcxzyw wrote:
`BinaryOperator::isNullPointerArithmeticExtension` only allows the pointer
operand to be a constant null. But `isUnderlyingBasePointerConstantNull` also
catches `((struct S*)0)->field`.
I think it is safe to remove this workaround and fall through to the
`isUnderlyingBasePointerConstantNull` check.
https://github.com/llvm/llvm-project/pull/137849
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