PR middle-end/41163
* gimplify.c (gimplify_addr_expr): Canonicalize ADDR_EXPRs if
the types to not match.
* tree-cfg.c (verify_gimple_assign_single): Adjust ADDR_EXPR
verification.
* tree-ssa.c (useless_type_conversion_p): Conversions to
pointers to unprototyped functions are useless.
* gcc.c-torture/compile/pr41163.c: New testcase.
* gcc.dg/pr35899.c: Adjust.