[Bug rtl-optimization/28772] scheduler is too slow and O(n^2) for ia64

["ebotcazou at gcc dot gnu dot org" <gcc-bugzilla at gcc dot gnu dot org>]

------- Comment #7 from ebotcazou at gcc dot gnu dot org  2007-02-14 20:51 -------
Subject: Bug 28772

Author: ebotcazou
Date: Wed Feb 14 20:51:12 2007
New Revision: 121964

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=121964
Log:
        PR rtl-optimization/28772
        * Makefile.in (haifa-sched.o): Add dependency on $(PARAMS_H).

        Backport from mainline:
        2006-04-13  Eric Botcazou  <ebotcazou@adacore.com>

        * params.def (PARAM_MAX_SCHED_READY_INSNS): New parameter,
        defaulting to 100.
        * params.h (MAX_SCHED_READY_INSNS): New macro.
        * haifa-sched.c: (queue_to_ready): Re-queue insns for the next cycle
        past MAX_SCHED_READY_INSNS during the first scheduling pass.
        (schedule_block): Delay insns past MAX_SCHED_READY_INSNS in
        the ready list for 1 cycle during the first scheduling pass.
        * doc/invoke.texi (--param): New parameter max-sched-ready-insns.


Modified:
    branches/gcc-4_1-branch/gcc/ChangeLog
    branches/gcc-4_1-branch/gcc/Makefile.in
    branches/gcc-4_1-branch/gcc/doc/invoke.texi
    branches/gcc-4_1-branch/gcc/haifa-sched.c
    branches/gcc-4_1-branch/gcc/params.def
    branches/gcc-4_1-branch/gcc/params.h


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=28772