[Bug rtl-optimization/41239] Scheduler reorders division by zero before a call that might not return

[jakub at gcc dot gnu dot org]

------- Comment #5 from jakub at gcc dot gnu dot org  2009-09-08 09:26 -------
Subject: Bug 41239

Author: jakub
Date: Tue Sep  8 09:25:47 2009
New Revision: 151500

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=151500
Log:
        PR rtl-optimization/41239
        * sched-int.h (struct deps): Add last_function_call_may_noreturn field.
        * sched-rgn.c (deps_join): Join also last_function_call_may_noreturn
        lists.
        * sched-deps.c (sched_analyze_insn): Prevent moving trapping insns
        across calls, as the calls might not always return normally.
        (call_may_noreturn_p): New function.
        (deps_analyze_insn): Update last_function_call_may_noreturn list.
        (init_deps): Initialize it.
        (remove_from_deps): Also remove calls from
        last_function_call_may_noreturn list.

        * gcc.c-torture/execute/pr41239.c: New test.

Added:
    trunk/gcc/testsuite/gcc.c-torture/execute/pr41239.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/sched-deps.c
    trunk/gcc/sched-int.h
    trunk/gcc/sched-rgn.c
    trunk/gcc/testsuite/ChangeLog


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41239