Yes, I meant
--
basic_block my_basic_block;
basic_block dup_basic_block;
FOR_EACH_BB(my_basic_block)
{
dup_basic_block = duplicate_block(my_basic_block, NULL);
}
--
I also got some more precise context. The statement being copied at
that point is:
--
*D.1600 = 0;
--
whose GIMPLE representation looks like this:
--
MODIFY_EXPR (2)
INDIRECT_REF (1)
VAR_DECL(0)
INTEGER_CST(0)
--
where the number in parentheses is the number of operands. The
backtrace below:
--
#0 0x0000000100175688 in get_indirect_ref_operands
(stmt=0xffffffff7ea0c640, expr=0xffffffff7eaf8100, flags=0)
at ../../gcc-4.0.1/gcc/tree-ssa-operands.c:1417
#1 0x0000000100173dcc in get_expr_operands
(stmt=0xffffffff7ea0c640, expr_p=0xffffffff7ea0c3f8, flags=0)
at ../../gcc-4.0.1/gcc/tree-ssa-operands.c:1091
#2 0x000000010017406c in get_expr_operands
(stmt=0xffffffff7ea0c640, expr_p=0xffffffff7ea0c680, flags=0)
at ../../gcc-4.0.1/gcc/tree-ssa-operands.c:1134
#3 0x0000000100172f94 in build_ssa_operands
(stmt=0xffffffff7ea0c640, ann=0xffffffff7eaf6850,
old_ops=0xffffffff7fffcd90, new_ops=0xffffffff7eaf6878)
at ../../gcc-4.0.1/gcc/tree-ssa-operands.c:906
#4 0x0000000100173b20 in get_stmt_operands (stmt=0xffffffff7ea0c640)
at ../../gcc-4.0.1/gcc/tree-ssa-operands.c:1021
#5 0x000000010010ca18 in tree_duplicate_bb (bb=0xffffffff7eafbe10)
at ../../gcc-4.0.1/gcc/tree-cfg.c:4684
#6 0x0000000100591ea8 in duplicate_block (bb=0xffffffff7eafbe10,
e=0x0)
at ../../gcc-4.0.1/gcc/cfghooks.c:717
...
--
is from an ICE:
- get_expr_operands() on the INDIRECT_REF calls
get_indirect_ref_operands(), and
- get_indirect_ref_operands() tries to look at the var_ann for the
INDIRECT_REF, which is NULL at that point.
Is the var_ann NULL because I need to require something more than
PROP_gimple_any | PROP_ssa | PROP_cfg | PROP_referenced_vars, or is
there something else going on here?
Sincerely,
Sean Callanan
