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

Thu Jul 11 14:43:54 PDT 2019

jfb 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.

Indeed.

Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D64597/new/

https://reviews.llvm.org/D64597