[Bug lto/60449] Merging function DECLs discards leaf attribute which causes cfg verifier to fail

[wmi at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=60449

--- Comment #17 from wmi at gcc dot gnu.org ---
Author: wmi
Date: Wed Aug 20 17:09:25 2014
New Revision: 214237

URL: https://gcc.gnu.org/viewcvs?rev=214237&root=gcc&view=rev
Log:
2014-08-20  Martin Jambor  <mjambor@suse.cz>
        Wei Mi  <wmi@google.com>

    PR ipa/60449
    PR middle-end/61776
    * tree-ssa-operands.c (update_stmt_operands): Remove
    MODIFIED_NORETURN_CALLS.
    * tree-cfgcleanup.c (cleanup_call_ctrl_altering_flag): New func.
    (cleanup_control_flow_bb): Use cleanup_call_ctrl_altering_flag.
    (split_bb_on_noreturn_calls): Renamed from split_bbs_on_noreturn_calls.
    (cleanup_tree_cfg_1): Use split_bb_on_noreturn_calls.
    * tree-ssanames.h: Remove MODIFIED_NORETURN_CALLS.
    * gimple.h (enum gf_mask): Add GF_CALL_CTRL_ALTERING.
    (gimple_call_set_ctrl_altering): New func.
    (gimple_call_ctrl_altering_p): Ditto.
    * tree-cfg.c (gimple_call_initialize_ctrl_altering): Ditto.
    (make_blocks): Use gimple_call_initialize_ctrl_altering.
    (is_ctrl_altering_stmt): Use gimple_call_ctrl_altering_p.
    (execute_fixup_cfg): Use gimple_call_ctrl_altering_p and
    remove MODIFIED_NORETURN_CALLS.

2014-08-20  Martin Jambor  <mjambor@suse.cz>
        Wei Mi  <wmi@google.com>

    PR ipa/60449
    PR middle-end/61776
    * testsuite/gcc.dg/lto/pr60449_1.c: New test.
    * testsuite/gcc.dg/lto/pr60449_0.c: New test.
    * testsuite/gcc.dg/pr61776.c: New test.


Added:
    branches/gcc-4_9-branch/gcc/testsuite/gcc.dg/lto/pr60449_0.c
    branches/gcc-4_9-branch/gcc/testsuite/gcc.dg/lto/pr60449_1.c
    branches/gcc-4_9-branch/gcc/testsuite/gcc.dg/pr61776.c
Modified:
    branches/gcc-4_9-branch/gcc/ChangeLog
    branches/gcc-4_9-branch/gcc/gimple.h
    branches/gcc-4_9-branch/gcc/testsuite/ChangeLog
    branches/gcc-4_9-branch/gcc/tree-cfg.c
    branches/gcc-4_9-branch/gcc/tree-cfgcleanup.c
    branches/gcc-4_9-branch/gcc/tree-ssa-operands.c
    branches/gcc-4_9-branch/gcc/tree-ssanames.h