re PR tree-optimization/35085 (gcc.dg/vect/vect-iv-9.c fails)
PR tree-optimization/35085 * tree-ssa-reassoc.c (rewrite_expr_tree): Enable destructive update for operand entry oe2 in addition to operand entry oe3 in order to expose more opportunities for vectorizer sum reduction. From-SVN: r132168
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2008-02-07 Uros Bizjak <ubizjak@gmail.com>
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PR tree-optimization/35085
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* tree-ssa-reassoc.c (rewrite_expr_tree): Enable destructive update
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for operand entry oe2 in addition to operand entry oe3 in order to
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expose more opportunities for vectorizer sum reduction.
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2008-02-06 Kaveh R. Ghazi <ghazi@caip.rutgers.edu>
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PR other/35107
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@ -857,6 +857,18 @@ rewrite_expr_tree (tree stmt, unsigned int opindex,
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oe1->op = temp.op;
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oe1->rank= temp.rank;
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}
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else if ((oe1->rank == oe3->rank
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&& oe2->rank != oe3->rank)
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|| (is_phi_for_stmt (stmt, oe2->op)
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&& !is_phi_for_stmt (stmt, oe1->op)
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&& !is_phi_for_stmt (stmt, oe3->op)))
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{
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struct operand_entry temp = *oe2;
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oe2->op = oe1->op;
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oe2->rank = oe1->rank;
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oe1->op = temp.op;
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oe1->rank= temp.rank;
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}
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}
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/* The final recursion case for this function is that you have
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