[Bug middle-end/79448] unhelpful -Wformat-truncation=2 INT_MAX warning

[msebor at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79448

--- Comment #6 from Martin Sebor <msebor at gcc dot gnu.org> ---
Author: msebor
Date: Tue Feb 14 16:51:24 2017
New Revision: 245437

URL: https://gcc.gnu.org/viewcvs?rev=245437&root=gcc&view=rev
Log:
PR middle-end/79448 - unhelpful -Wformat-truncation=2 warning

gcc/testsuite/ChangeLog:

        PR middle-end/79448
        * gcc.dg/tree-ssa/builtin-snprintf-warn-3.c: New test.
        * gcc.dg/tree-ssa/pr79448-2.c: New test.
        * gcc.dg/tree-ssa/pr79448.c: New test.

gcc/ChangeLog:

        PR middle-end/79448
        * gimple-ssa-sprintf.c (format_directive): Avoid issuing INT_MAX
          warning for strings of unknown length.


Added:
    trunk/gcc/testsuite/gcc.dg/tree-ssa/builtin-snprintf-warn-3.c
    trunk/gcc/testsuite/gcc.dg/tree-ssa/pr79448-2.c
    trunk/gcc/testsuite/gcc.dg/tree-ssa/pr79448.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/gimple-ssa-sprintf.c
    trunk/gcc/testsuite/ChangeLog