[Bug c/69759] __builtin_alloca and __builtin_alloca_with_align undocumented

[msebor at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69759

--- Comment #6 from Martin Sebor <msebor at gcc dot gnu.org> ---
Author: msebor
Date: Tue Feb 23 18:09:37 2016
New Revision: 233640

URL: https://gcc.gnu.org/viewcvs?rev=233640&root=gcc&view=rev
Log:
PR middle-end/69780 - [4.9/5/6 Regression] ICE on __builtin_alloca_with_align
        with small alignment
PR c/69759 - __builtin_alloca and __builtin_alloca_with_align undocumented

gcc/c-family/ChangeLog:
        * c-common.c (check_builtin_function_arguments): Validate and reject
        invalid arguments to __builtin_alloca_with_align.

gcc/ChangeLog:
        * doc/extend.texi (Other Builtins): Document __builtin_alloca and
        __builtin_alloca_with_align.

gcc/testsuite/ChangeLog:
        * g++.dg/ext/builtin_alloca.C: New test.
        * gcc.dg/builtins-68.c: New test.

Added:
    trunk/gcc/testsuite/g++.dg/ext/builtin_alloca.C
    trunk/gcc/testsuite/gcc.dg/builtins-68.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/c-family/ChangeLog
    trunk/gcc/c-family/c-common.c
    trunk/gcc/doc/extend.texi
    trunk/gcc/testsuite/ChangeLog