[Bug middle-end/86505] [6/7/8 Regression] __builtin_va_arg_pack_len() computes the number of arguments wrongly

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86505

--- Comment #5 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Fri Aug 17 08:48:58 2018
New Revision: 263613

URL: https://gcc.gnu.org/viewcvs?rev=263613&root=gcc&view=rev
Log:
2018-08-17  Richard Biener  <rguent...@suse.de>

        PR middle-end/86505
        * tree-inline.c (copy_bb): When inlining __builtin_va_arg_pack_len ()
        across a va-arg-pack using call adjust its return value accordingly.

        * gcc.dg/torture/pr86505.c: New testcase.

Added:
    trunk/gcc/testsuite/gcc.dg/torture/pr86505.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/tree-inline.c