re PR tree-optimization/52533 (ice in remove_range_assertions)
PR tree-optimization/52533 * tree-vrp.c (register_edge_assert_for_2): Use double_int type for mask, only handle shifts by non-zero in-range shift count, for LE_EXPR and GT_EXPR if new_val is maximum, don't add the assertion. * gcc.c-torture/compile/pr52533.c: New test. From-SVN: r185219
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@ -1,3 +1,11 @@
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2012-03-12 Jakub Jelinek <jakub@redhat.com>
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PR tree-optimization/52533
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* tree-vrp.c (register_edge_assert_for_2): Use double_int
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type for mask, only handle shifts by non-zero in-range
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shift count, for LE_EXPR and GT_EXPR if new_val is
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maximum, don't add the assertion.
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2012-02-12 Kirill Yukhin <kirill.yukhin@intel.com>
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* doc/invoke.texi: Document -mrtm option.
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@ -1,3 +1,8 @@
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2012-03-12 Jakub Jelinek <jakub@redhat.com>
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PR tree-optimization/52533
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* gcc.c-torture/compile/pr52533.c: New test.
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2012-03-12 Kirill Yukhin <kirill.yukhin@intel.com>
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* gcc.target/i386/rtm-xabort-1.c: New.
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@ -0,0 +1,19 @@
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/* PR tree-optimization/52533 */
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int
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foo (unsigned char x)
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{
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if (x <= 9)
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return '0' + x;
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else if (x <= 15)
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return 'a' + (x - 10);
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else
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return 0;
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}
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void
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bar (unsigned char x, unsigned char *y)
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{
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y[0] = foo ((unsigned char) (x >> 4));
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y[1] = foo ((unsigned char) (x & 0x0f));
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}
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@ -4470,7 +4470,8 @@ register_edge_assert_for_2 (tree name, edge e, gimple_stmt_iterator bsi,
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gimple def_stmt = SSA_NAME_DEF_STMT (name);
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tree name2 = NULL_TREE, cst2 = NULL_TREE;
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tree val2 = NULL_TREE;
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unsigned HOST_WIDE_INT mask[2] = { 0, 0 };
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double_int mask = double_int_zero;
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unsigned int prec = TYPE_PRECISION (TREE_TYPE (val));
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/* Extract CST2 from the right shift. */
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if (is_gimple_assign (def_stmt)
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@ -4480,23 +4481,13 @@ register_edge_assert_for_2 (tree name, edge e, gimple_stmt_iterator bsi,
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cst2 = gimple_assign_rhs2 (def_stmt);
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if (TREE_CODE (name2) == SSA_NAME
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&& host_integerp (cst2, 1)
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&& (unsigned HOST_WIDE_INT) tree_low_cst (cst2, 1)
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< 2 * HOST_BITS_PER_WIDE_INT
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&& INTEGRAL_TYPE_P (TREE_TYPE (name2))
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&& IN_RANGE (tree_low_cst (cst2, 1), 1, prec - 1)
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&& prec <= 2 * HOST_BITS_PER_WIDE_INT
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&& live_on_edge (e, name2)
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&& !has_single_use (name2))
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{
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if ((unsigned HOST_WIDE_INT) tree_low_cst (cst2, 1)
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< HOST_BITS_PER_WIDE_INT)
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mask[0] = ((unsigned HOST_WIDE_INT) 1
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<< tree_low_cst (cst2, 1)) - 1;
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else
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{
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mask[1] = ((unsigned HOST_WIDE_INT) 1
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<< (tree_low_cst (cst2, 1)
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- HOST_BITS_PER_WIDE_INT)) - 1;
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mask[0] = -1;
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}
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mask = double_int_mask (tree_low_cst (cst2, 1));
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val2 = fold_binary (LSHIFT_EXPR, TREE_TYPE (val), val, cst2);
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}
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}
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@ -4515,25 +4506,27 @@ register_edge_assert_for_2 (tree name, edge e, gimple_stmt_iterator bsi,
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{
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if (!TYPE_UNSIGNED (TREE_TYPE (val)))
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{
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unsigned int prec = TYPE_PRECISION (TREE_TYPE (val));
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tree type = build_nonstandard_integer_type (prec, 1);
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tmp = build1 (NOP_EXPR, type, name2);
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val2 = fold_convert (type, val2);
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}
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tmp = fold_build2 (MINUS_EXPR, TREE_TYPE (tmp), tmp, val2);
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new_val = build_int_cst_wide (TREE_TYPE (tmp), mask[0], mask[1]);
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new_val = double_int_to_tree (TREE_TYPE (tmp), mask);
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new_comp_code = comp_code == EQ_EXPR ? LE_EXPR : GT_EXPR;
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}
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else if (comp_code == LT_EXPR || comp_code == GE_EXPR)
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new_val = val2;
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else
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{
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new_val = build_int_cst_wide (TREE_TYPE (val2),
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mask[0], mask[1]);
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new_val = fold_binary (BIT_IOR_EXPR, TREE_TYPE (val2),
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val2, new_val);
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mask = double_int_ior (tree_to_double_int (val2), mask);
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if (double_int_minus_one_p (double_int_sext (mask, prec)))
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new_val = NULL_TREE;
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else
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new_val = double_int_to_tree (TREE_TYPE (val2), mask);
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}
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if (new_val)
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{
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if (dump_file)
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{
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fprintf (dump_file, "Adding assert for ");
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@ -4548,6 +4541,7 @@ register_edge_assert_for_2 (tree name, edge e, gimple_stmt_iterator bsi,
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retval = true;
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}
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}
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}
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return retval;
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}
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