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Author SHA1 Message Date
David Majnemer 86b1bfad05 [Sema] Warn when alignof is used with __builtin_alloca_with_align 
The second argument to __builtin_alloca_with_align is supposed to be in
bits, not bytes.  Using alignof there would be indicative of a bug.

llvm-svn: 285609
 2016-10-31 18:07:57 +00:00
David Majnemer 5116993f8e Add support for __builtin_alloca_with_align 
__builtin_alloca always uses __BIGGEST_ALIGNMENT__ for the alignment of
the allocation.  __builtin_alloca_with_align allows the programmer to
specify the alignment of the allocation.

This fixes PR30658.

llvm-svn: 285544
 2016-10-31 05:37:48 +00:00