[Bug middle-end/79123] incorrect -Walloca-larger-than: alloca may be too large due to conversion from long int to long unsigned int

[aldyh at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79123

--- Comment #3 from Aldy Hernandez <aldyh at gcc dot gnu.org> ---
Author: aldyh
Date: Tue Jan 24 09:50:33 2017
New Revision: 244859

URL: https://gcc.gnu.org/viewcvs?rev=244859&root=gcc&view=rev
Log:
        PR middle-end/79123
        * gimple-ssa-warn-alloca.c (alloca_call_type): Make sure
        casts from signed to unsigned really don't have a range.

Added:
    trunk/gcc/testsuite/gcc.dg/Walloca-13.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/gimple-ssa-warn-alloca.c