[Bug middle-end/37243] [4.4 Regression] IRA causes wrong code generation

[rsandifo at gcc dot gnu dot org]

------- Comment #31 from rsandifo at gcc dot gnu dot org  2008-09-04 18:48 -------
Subject: Bug 37243

Author: rsandifo
Date: Thu Sep  4 18:47:35 2008
New Revision: 139993

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=139993
Log:
gcc/
        PR middle-end/37243
        * ira-build.c (form_loop_tree): Reverse BB walk.
        (create_bb_allocnos): Likewise.
        * ira-lives.c (make_regno_born_and_dead, regs_set): Delete.
        (mark_reg_store): Rename to...
        (mark_ref_live): ...this and take a df_ref argument instead of
        note_stores arguments.  Assert that we have a register.
        (mark_reg_clobber): Delete.
        (def_conflicts_with_inputs_p): New function.
        (mark_reg_conflicts): Delete.
        (mark_reg_death): Rename to...
        (mark_ref_dead): ...this and take a df_ref argument instead of
        a register.  Assert that we have a register.
        (process_bb_node_lives): Hoist frequency calculation out of
        instruction walk.  Convert from a forwards scan to a backwards scan.
        Use DF_REF_USES and DF_REF_DEFS instead of register notes and
        note_stores.  Remove EH_RETURN_DATA_REGNO and regs_set handling.
        (create_allocno_live_ranges): Don't create regs_set.

Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/ira-build.c
    trunk/gcc/ira-lives.c


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37243