[PATCH] D157227: [Clang] Don't add `undef` for `operator new` under -fno-exceptions.

[DianQK via Phabricator via cfe-commits]

DianQK added a comment.

In D157227#4564817 <https://reviews.llvm.org/D157227#4564817>, @nikic wrote:

> Removing noundef makes no sense to me, because the return value is noundef even under fno-exceptions. If we remove something, it should be the nonnull attribute, because that's what's actually being violated.

Return null on nonnull is poison. So I can also think that the noundef attribute is violated. I think the reason for keeping nonnull is to match the semantics of `operator new`. But that probably doesn't make sense either.


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  https://reviews.llvm.org/D157227/new/

https://reviews.llvm.org/D157227