------- Comment #8 from bergner at gcc dot gnu dot org 2010-07-08 21:50 -------
The test case that was added to the testsuite (pr30338.c) ICE's on
powerpc64-linux with the following options: -Os -m64
Looking at a backtrace, we're hitting this assert in tree.c:build2_stat():
if (code == POINTER_PLUS_EXPR && arg0 && arg1 && tt)
gcc_assert (POINTER_TYPE_P (tt) && POINTER_TYPE_P (TREE_TYPE (arg0))
&& INTEGRAL_TYPE_P (TREE_TYPE (arg1))
&& useless_type_conversion_p (sizetype, TREE_TYPE (arg1)));
gdb shows this:
(gdb) frame 1
#1 0x000000001066de84 in build2_stat (code=POINTER_PLUS_EXPR,
tt=0x40000410000, arg0=0x400005112e8, arg1=0x400003104b0)
at /home/bergner/gcc/gcc-mainline-r161924/gcc/tree.c:3715
3715 gcc_assert (POINTER_TYPE_P (tt) && POINTER_TYPE_P (TREE_TYPE
(arg0))
(gdb) call debug_tree(tt)
<integer_type 0x40000410000 long unsigned int public unsigned sizetype DI
size <integer_cst 0x40000310780 type <integer_type 0x400004100a8
bit_size_type> constant 64>
unit size <integer_cst 0x400003107a8 type <integer_type 0x40000410000 long
unsigned int> constant 8>
align 64 symtab 0 alias set -1 canonical type 0x40000410000 precision 64
min <integer_cst 0x400003107d0 0> max <integer_cst 0x40000310aa0 -1>>
(gdb) call debug_tree(arg0)
<ssa_name 0x400005112e8
type <integer_type 0x40000410000 long unsigned int public unsigned sizetype
DI
size <integer_cst 0x40000310780 constant 64>
unit size <integer_cst 0x400003107a8 constant 8>
align 64 symtab 0 alias set -1 canonical type 0x40000410000 precision
64 min <integer_cst 0x400003107d0 0> max <integer_cst 0x40000310aa0 -1>>
visited var <var_decl 0x400004f1fe0 D.2060>def_stmt D.2060_43 = ivtmp.27_37
+ D.2059_42;
version 43>
(gdb) call debug_tree(arg1)
<integer_cst 0x400003104b0 type <integer_type 0x40000410000 long unsigned int>
constant 1>
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=30338
