2012-05-23 Richard Guenther <rguenther@suse.de>
* tree-dfa.c (add_referenced_var_1): Do not add global vars.
* tree-ssa-live.c (mark_all_vars_used_1): Handle global vars
via the global_unused_vars bitmap.
(remove_unused_locals): Handle global vars in local-decls via
a global_unused_vars bitmap instead of the used flag in the
var annotation. Simplify global variable handling and removal.
* gcc.dg/torture/pr39074-2.c: Adjust.
* gcc.dg/torture/pr39074.c: Likewise.
* gcc.dg/torture/pta-structcopy-1.c: Likewise.
* gcc.dg/tree-ssa/alias-19.c: Likewise.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@187800
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