[Bug tree-optimization/56205] [4.8 Regression] stdarg pass confused by jump threading

[jakub at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56205



--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> 2013-02-05 
15:54:49 UTC ---

Author: jakub

Date: Tue Feb  5 15:54:39 2013

New Revision: 195760



URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=195760

Log:

    PR tree-optimization/56205

    * tree-stdarg.c (check_all_va_list_escapes): Return true if

    there are any PHI nodes that set non-va_list_escape_vars SSA_NAME

    and some va_list_escape_vars SSA_NAME appears in some PHI argument.



    * gcc.dg/tree-ssa/stdarg-6.c: New test.

    * gcc.c-torture/execute/pr56205.c: New test.



Added:

    trunk/gcc/testsuite/gcc.c-torture/execute/pr56205.c

    trunk/gcc/testsuite/gcc.dg/tree-ssa/stdarg-6.c

Modified:

    trunk/gcc/ChangeLog

    trunk/gcc/testsuite/ChangeLog

    trunk/gcc/tree-stdarg.c