[Bug tree-optimization/55124] New: ICE in find_or_generate_expression, at tree-ssa-pre.c:2803

[antoine.balestrat at gmail dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55124

             Bug #: 55124
           Summary: ICE in find_or_generate_expression, at
                    tree-ssa-pre.c:2803
    Classification: Unclassified
           Product: gcc
           Version: 4.8.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: tree-optimization
        AssignedTo: unassig...@gcc.gnu.org
        ReportedBy: antoine.balest...@gmail.com


Using GCC 4.8.0 20121029 :

$ cat daexpr.c
int a, b;
long c;

void f2(void)
{
    unsigned long k = 1;

    foo(b ? k = 0 : 0);

    b = ((c = b) ? (k ? : (c = 0)) : a) * c;
}

void f1(void)
{
    f2();

    a = b | c;
}

$ xgcc -O3 -w daexpr.c
daexpr.c: In function ‘f1’:
daexpr.c:13:6: internal compiler error: in find_or_generate_expression, at
tree-ssa-pre.c:2803
 void f1(void)
      ^
0xb86241 find_or_generate_expression
    ../../srcdir/gcc/tree-ssa-pre.c:2803
0xb863cb create_expression_by_pieces
    ../../srcdir/gcc/tree-ssa-pre.c:2862
0xb86201 find_or_generate_expression
    ../../srcdir/gcc/tree-ssa-pre.c:2800
0xb863cb create_expression_by_pieces
    ../../srcdir/gcc/tree-ssa-pre.c:2862
0xb86f2b insert_into_preds_of_block
    ../../srcdir/gcc/tree-ssa-pre.c:3097
0xb87de3 do_regular_insertion
    ../../srcdir/gcc/tree-ssa-pre.c:3387
0xb8859b insert_aux
    ../../srcdir/gcc/tree-ssa-pre.c:3601
0xb885fe insert_aux
    ../../srcdir/gcc/tree-ssa-pre.c:3611
0xb885fe insert_aux
    ../../srcdir/gcc/tree-ssa-pre.c:3611
0xb886d8 insert
    ../../srcdir/gcc/tree-ssa-pre.c:3634
0xb8bb49 do_pre
    ../../srcdir/gcc/tree-ssa-pre.c:4710
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