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

[Reid Kleckner via Phabricator via cfe-commits]

rnk added a comment.

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.


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https://reviews.llvm.org/D70101