[Bug tree-optimization/55955] New: ICE in optab_for_tree_code, at optabs.c:402

[antoine.balestrat at gmail dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55955

             Bug #: 55955
           Summary: ICE in optab_for_tree_code, at optabs.c:402
    Classification: Unclassified
           Product: gcc
           Version: 4.8.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: tree-optimization
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: antoine.balestrat@gmail.com


Hi ! Using GCC 4.8.0 as of 20130112 :

$ cat optab.c
int a, b;

void f(void)
{
    for(; a; a++)
    {
        for(b = 0; b < 2; b++)
            *((unsigned short*)(0x14524875)) %= 46;
    }
}

$ xgcc -O2 -ftree-vectorize -w optab.c
optab.c: In function ‘f’:
optab.c:3:6: internal compiler error: in optab_for_tree_code, at optabs.c:402
 void f(void)
      ^
0x827c81 optab_for_tree_code(tree_code, tree_node const*, optab_subtype)
    ../../srcdir/gcc/optabs.c:402
0xa8ba69 vectorizable_reduction(gimple_statement_d*, gimple_stmt_iterator*,
gimple_statement_d**, _slp_tree*)
    ../../srcdir/gcc/tree-vect-loop.c:4780
0xa806f5 vect_analyze_stmt(gimple_statement_d*, bool*, _slp_tree*)
    ../../srcdir/gcc/tree-vect-stmts.c:5704
0xa7f685 vect_analyze_stmt(gimple_statement_d*, bool*, _slp_tree*)
    ../../srcdir/gcc/tree-vect-stmts.c:5626
0x4cde84 vect_analyze_loop_operations
    ../../srcdir/gcc/tree-vect-loop.c:1443
0xa8a8ed vect_analyze_loop_2
    ../../srcdir/gcc/tree-vect-loop.c:1720
0xa8a8ed vect_analyze_loop(loop*)
    ../../srcdir/gcc/tree-vect-loop.c:1773
0xa9e60c vectorize_loops()
    ../../srcdir/gcc/tree-vectorizer.c:113
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