[Bug middle-end/51323] [4.6/4.7 Regression] g++ confuses this with function argument in optimized call

[jakub at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51323

--- Comment #10 from Jakub Jelinek <jakub at gcc dot gnu.org> 2011-12-05 
08:15:36 UTC ---
Author: jakub
Date: Mon Dec  5 08:15:23 2011
New Revision: 182000

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=182000
Log:
    PR middle-end/51323
    PR middle-end/50074
    * calls.c (internal_arg_pointer_exp_state): New variable.
    (internal_arg_pointer_based_exp_1,
    internal_arg_pointer_exp_scan): New functions.
    (internal_arg_pointer_based_exp): New function.
    (mem_overlaps_already_clobbered_arg_p): Use it.
    (expand_call): Free internal_arg_pointer_exp_state.cache vector
    and clear internal_arg_pointer_exp_state.scan_start.

    * gcc.c-torture/execute/pr51323.c: New test.

Added:
    trunk/gcc/testsuite/gcc.c-torture/execute/pr51323.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/calls.c
    trunk/gcc/testsuite/ChangeLog