[Bug tree-optimization/87096] "Optimised" snprintf is not POSIX conformant

[msebor at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87096

--- Comment #12 from Martin Sebor <msebor at gcc dot gnu.org> ---
Author: msebor
Date: Fri Dec 14 22:38:08 2018
New Revision: 267157

URL: https://gcc.gnu.org/viewcvs?rev=267157&root=gcc&view=rev
Log:
PR tree-optimization/87096 - Optimised snprintf is not POSIX conformant

gcc/ChangeLog:

        PR rtl-optimization/87096
        * gimple-ssa-sprintf.c (sprintf_dom_walker::handle_gimple_call): Avoid
        folding calls whose bound may exceed INT_MAX.  Diagnose bound ranges
        that exceed the limit.

gcc/testsuite/ChangeLog:

        PR tree-optimization/87096
        * gcc.dg/tree-ssa/builtin-snprintf-4.c: New test.


Added:
    trunk/gcc/testsuite/gcc.dg/tree-ssa/builtin-snprintf-4.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/gimple-ssa-sprintf.c
    trunk/gcc/testsuite/ChangeLog