2014-06-13 Richard Biener <rguenther@suse.de>
* tree-ssa-pre.c (eliminate_dom_walker::before_dom_children):
Rewrite to propagate the VN result into all uses where
possible and to remove stmts becoming dead because of that.
(eliminate): Generalize stmt removal handling, remove in
reverse dominator order to support proper debug stmt
generation. Update stmts before removing stmts.
* tree-ssa-propagate.c (propagate_tree_value): Remove
bogus assert.
* c-c++-common/pr46562-2.c: Adjust.
* g++.dg/tree-ssa/pr8781.C: Likewise.
* gcc.dg/tree-ssa/ssa-fre-24.c: Likewise.
* gcc.dg/tree-ssa/ssa-fre-25.c: Likewise.
* gcc.dg/tree-ssa/ssa-fre-32.c: Likewise.
* gcc.dg/tree-ssa/ssa-fre-39.c: Likewise.
* gcc.dg/tree-ssa/ssa-pre-16.c: Likewise.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@211625
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