[Bug middle-end/38474] [Meta] slow compilation at -O0 (callgraph optimization, inline heuristics, expand )

[matz at gcc dot gnu dot org]

------- Comment #42 from matz at gcc dot gnu dot org  2009-12-03 13:36 -------
Subject: Bug 38474

Author: matz
Date: Thu Dec  3 13:36:32 2009
New Revision: 154945

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=154945
Log:
        PR middle-end/38474
        * cfgexpand.c (struct stack_var): Add conflicts member.
        (stack_vars_conflict, stack_vars_conflict_alloc,
        n_stack_vars_conflict): Remove.
        (add_stack_var): Initialize conflicts member.
        (triangular_index, resize_stack_vars_conflict): Remove.
        (add_stack_var_conflict, stack_var_conflict_p): Rewrite in
        terms of new member.
        (union_stack_vars): Only run over the conflicts.
        (partition_stack_vars): Remove special case.
        (expand_used_vars_for_block): Don't call resize_stack_vars_conflict,
        don't create self-conflicts.
        (account_used_vars_for_block): Don't create any conflicts.
        (fini_vars_expansion): Free bitmaps, don't free or clear removed
        globals.

Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/cfgexpand.c


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=38474