On 10/4/21 14:42, Martin Sebor wrote:
While resolving the recent -Waddress enhancement request (PR
PR102103) I came across a 2007 problem report about GCC 4 having
stopped warning for using the address of inline functions in
equality comparisons with null. With inline functions being
commonplace in C++ this seems like an important use case for
the warning.
The change that resulted in suppressing the warning in these
cases was introduced inadvertently in a fix for PR 22252.
To restore the warning, the attached patch enhances
the decl_with_nonnull_addr_p() function to return true also for
weak symbols for which a definition has been provided.
I think you probably want to merge this function with
fold-const.c:maybe_nonzero_address, which already handles more cases.
Jason
