[Bug tree-optimization/30562] [4.3 Regression] remove unused variable is removing a referenced variable (in STORED_SYMS or LOADED_SYMS)

[dnovillo at gcc dot gnu dot org]

------- Comment #6 from dnovillo at gcc dot gnu dot org  2007-02-08 16:56 
-------
Subject: Bug 30562

Author: dnovillo
Date: Thu Feb  8 16:55:43 2007
New Revision: 121715

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=121715
Log:

        PR 30562
        * tree-flow.h (struct var_ann_d): Remove field 'is_used'.
        Update all users.
        * tree-ssa-alias.c (compute_is_aliased): Remove.  Update all
        users.
        (init_alias_info):
        * tree-ssa-live.c (remove_unused_locals): Do not remove
        TREE_ADDRESSABLE variables.
        * tree-ssa-structalias.c (compute_points_to_sets): Tidy.
        * tree-ssa-operands.c (add_virtual_operand): Remove argument
        FOR_CLOBBER.  Update all users.
        If VAR has an associated alias set, add a virtual operand for
        it if no alias is found to conflict with the memory reference.


Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/tree-dfa.c
    trunk/gcc/tree-flow.h
    trunk/gcc/tree-ssa-alias.c
    trunk/gcc/tree-ssa-live.c
    trunk/gcc/tree-ssa-operands.c
    trunk/gcc/tree-ssa-structalias.c
    trunk/gcc/tree-ssa.c


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=30562