[PATCH] D70101: [X86] Fix the implementation of __readcr3/__writecr3 to work in 64-bit mode

[Craig Topper via Phabricator via cfe-commits]

craig.topper added a comment.

In D70101#1741452 <https://reviews.llvm.org/D70101#1741452>, @rnk wrote:

> What do you think of using `__INTPTR_TYPE__` for this instead? If that doesn't work, we could define and undefine our own macro to use as a typedef. The resulting code should be clean enough that we can generalize it to `__readcr0` etc.
>
> It looks like `long` is the correct return type for 32-bit:
>  https://gcc.godbolt.org/z/6NzZWz
>  I'm not sure what the best device to figure out `__writecr3` would be.


I cobbled together some code from stackoverflow. I think the input type for __writecr3 really is int https://gcc.godbolt.org/z/dc8hQq


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