Chris Lattner 3eb172a02b Teach sema and codegen about the difference between address of labels, ...

which is a common idiom to improve PIC'ness of code using the addr of
label extension.  This implementation is a gross hack, but the only other
alternative would be to teach evalutate about this horrid combination.
While GCC allows things like "&&foo - &&bar + 1", people don't use this
in practice.  This implements PR5131.

llvm-svn: 83957

2009-10-13 07:14:16 +00:00

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