[Bug middle-end/67239] [6 Regression] FAIL: 23_containers/unordered_set/insert/hash_policy.cc execution test

hjl.tools at gmail dot com gcc-bugzilla@gcc.gnu.org
Wed Nov 11 23:57:00 GMT 2015


https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67239

--- Comment #4 from H.J. Lu <hjl.tools at gmail dot com> ---
+       /* If that didn't simplify to a constant see if we have recorded
+          temporary expressions from taken edges.  */
+       if (!val || TREE_CODE (val) != INTEGER_CST)
+         {
+           tree ops[2];
+           ops[0] = gimple_cond_lhs (stmt);
+           ops[1] = gimple_cond_rhs (stmt);
+           val = vn_nary_op_lookup_pieces (2, gimple_cond_code (stmt),
+                                           boolean_type_node, ops, NULL);
+         }

turns

<ssa_name 0x7f20520c9af8
    type <integer_type 0x7f2055314d20 size_type sizes-gimplified asm_written
used unsigned type_6 SI
        size <integer_cst 0x7f2058946e58 constant 32>
        unit size <integer_cst 0x7f2058946e70 constant 4>
        align 32 symtab 1390664112 alias set -1 canonical type 0x7f205894a888
precision 32 min <integer_cst 0x7f20589670f0 0> max <integer_cst 0x7f20589670d8
4294967295>>
    visited var <parm_decl 0x7f20540e7900 __n>def_stmt GIMPLE_NOP

    version 5>
 <integer_cst 0x7f205253ce70 type <integer_type 0x7f2058aaa498 size_t> constant
536870911>

if (__n_5(D) > 536870911)

into

 <integer_cst 0x7f2058967210 type <boolean_type 0x7f205894ad20 bool> constant
0>

This can't be right.


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