gimple-fold.c (gimple_fold_stmt_to_constant_1): For ternary ops with an embedded expression valueize and fold that as well.
2011-10-05 Richard Guenther <rguenther@suse.de> * gimple-fold.c (gimple_fold_stmt_to_constant_1): For ternary ops with an embedded expression valueize and fold that as well. * tree-ssa-sccvn.c (try_to_simplify): Also allow SSA name results from gimple_fold_stmt_to_constant_1. From-SVN: r179543
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@ -1,3 +1,11 @@
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2011-10-05 Richard Guenther <rguenther@suse.de>
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* gimple-fold.c (gimple_fold_stmt_to_constant_1): For
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ternary ops with an embedded expression valueize and fold
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that as well.
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* tree-ssa-sccvn.c (try_to_simplify): Also allow SSA name
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results from gimple_fold_stmt_to_constant_1.
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2011-10-05 Nick Clifton <nickc@redhat.com>
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* config/rx/rx.md (tablejump): Add missing label.
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@ -2569,6 +2569,19 @@ gimple_fold_stmt_to_constant_1 (gimple stmt, tree (*valueize) (tree))
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tree op1 = (*valueize) (gimple_assign_rhs2 (stmt));
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tree op2 = (*valueize) (gimple_assign_rhs3 (stmt));
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/* Fold embedded expressions in ternary codes. */
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if ((subcode == COND_EXPR
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|| subcode == VEC_COND_EXPR)
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&& COMPARISON_CLASS_P (op0))
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{
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tree op00 = (*valueize) (TREE_OPERAND (op0, 0));
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tree op01 = (*valueize) (TREE_OPERAND (op0, 1));
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tree tem = fold_binary_loc (loc, TREE_CODE (op0),
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TREE_TYPE (op0), op00, op01);
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if (tem)
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op0 = tem;
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}
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return fold_ternary_loc (loc, subcode,
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gimple_expr_type (stmt), op0, op1, op2);
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}
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@ -2967,27 +2967,29 @@ simplify_unary_expression (gimple stmt)
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static tree
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try_to_simplify (gimple stmt)
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{
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enum tree_code code = gimple_assign_rhs_code (stmt);
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tree tem;
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/* For stores we can end up simplifying a SSA_NAME rhs. Just return
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in this case, there is no point in doing extra work. */
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if (gimple_assign_copy_p (stmt)
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&& TREE_CODE (gimple_assign_rhs1 (stmt)) == SSA_NAME)
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if (code == SSA_NAME)
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return NULL_TREE;
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/* First try constant folding based on our current lattice. */
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tem = gimple_fold_stmt_to_constant (stmt, vn_valueize);
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if (tem)
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tem = gimple_fold_stmt_to_constant_1 (stmt, vn_valueize);
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if (tem
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&& (TREE_CODE (tem) == SSA_NAME
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|| is_gimple_min_invariant (tem)))
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return tem;
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/* If that didn't work try combining multiple statements. */
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switch (TREE_CODE_CLASS (gimple_assign_rhs_code (stmt)))
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switch (TREE_CODE_CLASS (code))
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{
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case tcc_reference:
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/* Fallthrough for some codes that can operate on registers. */
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if (!(TREE_CODE (gimple_assign_rhs1 (stmt)) == REALPART_EXPR
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|| TREE_CODE (gimple_assign_rhs1 (stmt)) == IMAGPART_EXPR
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|| TREE_CODE (gimple_assign_rhs1 (stmt)) == VIEW_CONVERT_EXPR))
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/* Fallthrough for some unary codes that can operate on registers. */
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if (!(code == REALPART_EXPR
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|| code == IMAGPART_EXPR
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|| code == VIEW_CONVERT_EXPR))
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break;
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/* We could do a little more with unary ops, if they expand
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into binary ops, but it's debatable whether it is worth it. */
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