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On the review for <a class="moz-txt-link-freetext" href="http://reviews.llvm.org/D6808">http://reviews.llvm.org/D6808</a>, <a
href="http://reviews.llvm.org/p/majnemer/" class="phui-handle
phui-link-person">majnemer</a> commented that:<br>
<span class="transaction-comment" data-sigil="transaction-comment"
data-meta="14_7">"Address space 1 has a special meaning in LLVM,
it's identical to address space 0 except for the fact that "null"
may be dereferenced. You might want to consider a different
address space."<br>
<br>
This is the first I've heard of this and I can't find any
documentation about it being reserved, either in general, or
specifically for x86. Can anyone clarify?<br>
<br>
The only address spaces with special meanings I know of are:<br>
- 0 (the normal address space, null is not dereferencable)<br>
- 256 - TLS, GS relative addressing<br>
- 257 - FS relative addressing<br>
<br>
Philip<br>
</span>
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