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tree-ssa-dom.c (simplify_rhs_and_lookup_avail_expr): Do not perform reassociation if the parent statement will not die as a result...

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* tree-ssa-dom.c (simplify_rhs_and_lookup_avail_expr): Do not
        perform reassociation if the parent statement will not die as
        a result of the optimization.

From-SVN: r106744
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Jeff Law 2005-11-10 11:31:07 -07:00 committed by Jeff Law
parent c900f6aa99
commit ae14e67b2f
2 changed files with 8 additions and 0 deletions
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@ -1,3 +1,10 @@
2005-11-04 Jeff Law <law@redhat.com>
PR middle-end/23181
* tree-ssa-dom.c (simplify_rhs_and_lookup_avail_expr): Do not
perform reassociation if the parent statement will not die as
a result of the optimization.
2005-11-10 Daniel Berlin <dberlin@dberlin.org>
* tree-ssa-alias.c (compute_may_aliases): Remove call to

1
gcc/tree-ssa-dom.c
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@ -1794,6 +1794,7 @@ simplify_rhs_and_lookup_avail_expr (tree stmt, int insert)
assignment. Add minus to this, as we handle it specially below. */
if ((associative_tree_code (rhs_code) || rhs_code == MINUS_EXPR)
&& TREE_CODE (TREE_OPERAND (rhs, 0)) == SSA_NAME
&& num_imm_uses (TREE_OPERAND (rhs, 0)) == 1
&& is_gimple_min_invariant (TREE_OPERAND (rhs, 1)))
{
tree rhs_def_stmt = SSA_NAME_DEF_STMT (TREE_OPERAND (rhs, 0));