[PATCH] D64597: CodeGet: Init 32bit pointers with 0xFFFFFFFF

[Hubert Tong via Phabricator via cfe-commits]

hubert.reinterpretcast added a comment.

In D64597#1581605 <https://reviews.llvm.org/D64597#1581605>, @pcc wrote:

> The problem with `0xaaaaaaaa` on 32-bit is that it is likely to be a valid address.
>
> When I discussed this with JF I proposed a pointer initialization of `0xffffffff` which he agreed to. This value is very likely to trap when accessed (due to accesses likely wrapping to zero) and also has the benefit of being the same pattern as for floats.


The value is very likely not to trap on some systems (due to accesses likely wrapping to zero). I am not sure I have a better magic value to offer though.


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https://reviews.llvm.org/D64597