Although IPA-SRA is not yet enabled for general public...
Regression test on alpha with ipa-sra enabled in opts.c and with patch from
OR41395, comment $42 [1] applied to fix bootstrap failure with va_args, shows a
couple of segfaults in libstdc++ testsuite.
Soon-to-be-attached preprocessed c++ file fails with a crosscompiler from
x86_64-pc-linux-gnu to alpha-linux-gnu with "-O2 -g -std=c++0x":
~/gcc-build-alpha-c++/gcc/cc1plus -O2 -g -quiet -std=c++0x 24803.ii
In file included from
/home/uros/gcc-build/alphaev68-unknown-linux-gnu/libstdc++-v3/include/functional:70:0,
from
/home/uros/gcc-svn/trunk/libstdc++-v3/testsuite/20_util/reference_wrapper/24803.cc:22:
/home/uros/gcc-build/alphaev68-unknown-linux-gnu/libstdc++-v3/include/tr1_impl/functional:
In function typename __gnu_cxx::__enable_if<((std::is_member_pointer::value &&
(! std::is_function::value)) && (! std::is_function::value)), typename
std::result_of<_Functor(_ArgTypes ...)>::type>::__type std::__invoke(_Functor&,
_Args& ...) [with _Functor = int (test_type::*)(), _Args = test_type*, typename
__gnu_cxx::__enable_if<((std::is_member_pointer::value && (!
std::is_function::value)) && (! std::is_function::value)), typename
std::result_of<_Functor(_ArgTypes ...)>::type>::__type = int]:
/home/uros/gcc-build/alphaev68-unknown-linux-gnu/libstdc++-v3/include/tr1_impl/functional:464:36:
internal compiler error: Segmentation fault
Please submit a full bug report,
...
Starting program: /home/uros/gcc-build-alpha-c++/gcc/cc1plus -O2 -g -quiet
-std=c++0x 24803.ii
Program received signal SIGSEGV, Segmentation fault.
0x00000000004b0ae7 in function_parameter_expanded_from_pack_p
(param_decl=0x7ffff21dea20, pack=0x7ffff2824870)
at ../../gcc-svn/trunk/gcc/cp/pt.c:2679
2679 return DECL_PARM_INDEX (pack) == DECL_PARM_INDEX (param_decl);
Missing separate debuginfos, use: debuginfo-install glibc-2.10.1-5.x86_64
(gdb) bt
#0 0x00000000004b0ae7 in function_parameter_expanded_from_pack_p
(param_decl=0x7ffff21dea20, pack=0x7ffff2824870)
at ../../gcc-svn/trunk/gcc/cp/pt.c:2679
#1 0x00000000006bc559 in gen_formal_parameter_pack_die (next_arg=<value
optimized out>, subr_die=<value optimized out>,
pack_arg=<value optimized out>, parm_pack=<value optimized out>) at
../../gcc-svn/trunk/gcc/dwarf2out.c:15562
#2 gen_subprogram_die (next_arg=<value optimized out>, subr_die=<value
optimized out>, pack_arg=<value optimized out>,
parm_pack=<value optimized out>) at
../../gcc-svn/trunk/gcc/dwarf2out.c:16105
#3 0x00000000006bad5d in gen_decl_die (decl=0x7ffff216f800, origin=0x0,
context_die=0x7ffff2a4d360)
at ../../gcc-svn/trunk/gcc/dwarf2out.c:17641
#4 0x00000000006be194 in dwarf2out_abstract_function (decl=0x7ffff216f800) at
../../gcc-svn/trunk/gcc/dwarf2out.c:15727
#5 0x0000000000a5a2ea in expand_call_inline (bb=<value optimized out>,
stmt=0x7ffff2074780, id=0x7fffffffdda0)
at ../../gcc-svn/trunk/gcc/tree-inline.c:3820
(gdb) frame 0
#0 0x00000000004b0ae7 in function_parameter_expanded_from_pack_p
(param_decl=0x7ffff21dea20, pack=0x7ffff2824870)
at ../../gcc-svn/trunk/gcc/cp/pt.c:2679
2679 return DECL_PARM_INDEX (pack) == DECL_PARM_INDEX (param_decl);
(gdb) p debug_tree (pack)
<parm_decl 0x7ffff2824870 __args
type <type_pack_expansion 0x7ffff29a9180
type <reference_type 0x7ffff29a8900 type <template_type_parm
0x7ffff29a4480 _Args>
unsigned DI
size <integer_cst 0x7ffff29749f0 constant 64>
unit size <integer_cst 0x7ffff2974a20 constant 8>
align 64 symtab 0 alias set -1 canonical type 0x7ffff252e000>
type_0 type_6 VOID
align 8 symtab 0 alias set -1 structural equality
chain <tree_list 0x7ffff24809f0>>
used decl_1 VOID file
/home/uros/gcc-build/alphaev68-unknown-linux-gnu/libstdc++-v3/include/tr1_impl/functional
line 278 col 39
align 8 context <function_decl 0x7ffff2976500 __invoke>
>
$1 = void
(gdb) p debug_tree (param_decl)
<parm_decl 0x7ffff21dea20 ISRA.11
type <pointer_type 0x7ffff23b8480
type <record_type 0x7ffff23b7840 test_type asm_written type_5 type_6 QI
size <integer_cst 0x7ffff2974660 constant 8>
unit size <integer_cst 0x7ffff2974690 constant 1>
align 8 symtab -230694144 alias set 13 canonical type
0x7ffff23b7840 fields <type_decl 0x7ffff23b7cc0 test_type>
full-name "struct test_type"
X() X(constX&) this=(X&) n_parents=0 use_template=0
interface-unknown
pointer_to_this <pointer_type 0x7ffff23b8480> reference_to_this
<reference_type 0x7ffff21b5540> chain <type_decl 0x7ffff23b7c00 test_type>>
sizes-gimplified asm_written public unsigned type_6 DI
size <integer_cst 0x7ffff29749f0 constant 64>
unit size <integer_cst 0x7ffff2974a20 constant 8>
align 64 symtab -230693856 alias set 7 canonical type 0x7ffff23b8480
pointer_to_this <pointer_type 0x7ffff22b0e40> reference_to_this
<reference_type 0x7ffff22b0780>>
used unsigned ignored abstract DI file (null) line 0 col 0 size
<integer_cst 0x7ffff29749f0 64> unit size <integer_cst 0x7ffff2974a20 8>
align 64 context <function_decl 0x7ffff216f800 __invoke> arg-type
<pointer_type 0x7ffff23b8480>>
$2 = void
Please note the name of param_decl argument (ISRA.11).
I sincerely don't know which component is responsible for this failure, so I'll
mark this PR as c++. Looking at the backtrace and due to the fact that "-g" is
needed, recent debug changes should be considered, too.
Version signature:
xgcc (GCC) 4.5.0 20090930 (experimental) [trunk revision 152332]
[1] http://gcc.gnu.org/bugzilla/attachment.cgi?id=18676&action=view
--
Summary: IPA-SRA segfaults in libstdc++ tests (i.e.
20_util/reference_wrapper/24803.cc)
Product: gcc
Version: 4.5.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: ubizjak at gmail dot com
GCC build triplet: x86_64-pc-linux-gnu
GCC host triplet: x86_64-pc-linux-gnu
GCC target triplet: alphaev68-unknown-linux-gnu
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41527
