Many attributes that accept integer constant as a parameter call
default_conversion for such constants to perform the usual arithmetic
conversions. The call to default_conversion is always guarded so as
to prevent a NULL_TREE, an IDENTIFIER_NODE, or a FUNCTION_DECL from
getting into this function. But the alloc_align attribute was missing
the FUNCTION_DECL check, so we were crashing when someone passed a
function decl as a parameter to it.
Bootstrapped/regtested on x86_64-linux, ok for trunk?
2016-07-28 Marek Polacek <polacek@redhat.com>
PR c/71574
* c-common.c (handle_alloc_align_attribute): Also check FUNCTION_DECL.
* c-c++-common/pr71574.c: New test.