[cfe-commits] [PATCH] Add support to alloc_size attribute

[Xi Wang]

Hi,

The first patch adds support to the alloc_size attribute.

http://llvm.org/bugs/show_bug.cgi?id=10516

Thanks to Eli Friedman for the earlier comments.

The second patch demonstrates one use of alloc_size.  It extends
the malloc overflow checker to support custom allocators:

void *my_malloc(size_t) __attribute__((alloc_size(1)));

void *foo(int n)
{
  return my_malloc(n * sizeof(int));  // warning
}

Please review.  Thanks.

- xi
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