Outdated recommendation?

[Chris Lattner]

Is this obsolete?

"If you want a variable to be unaltered by longjmp, and you don't want to
write volatile because old C compilers don't accept it, just take the
address of the variable. If a variable's address is ever taken, even if
just to compute it and ignore it, then the variable cannot go in a
register:"

It is from the bottom of:
http://gcc.gnu.org/onlinedocs/gccint/Interface.html#Interface

I imagine that this is not the case for tree-ssa any longer.

-Chris

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