https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70621
Bug ID: 70621
Summary: ICE on invalid code at -O1 and above on
x86_64-linux-gnu in record_reference, at
cgraphbuild.c:64
Product: gcc
Version: 6.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: su at cs dot ucdavis.edu
Target Milestone: ---
The following code causes an ICE when compiled with the current GCC trunk at
-O1 and above on x86_64-linux-gnu in both 32-bit and 64-bit modes.
This is a regression from 5.3.x.
$ g++-trunk -v
Using built-in specs.
COLLECT_GCC=g++-trunk
COLLECT_LTO_WRAPPER=/usr/local/gcc-trunk/libexec/gcc/x86_64-pc-linux-gnu/6.0.0/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: ../gcc-source-trunk/configure --enable-languages=c,c++,lto
--prefix=/usr/local/gcc-trunk --disable-bootstrap
Thread model: posix
gcc version 6.0.0 20160410 (experimental) [trunk revision 234869] (GCC)
$
$ g++-trunk -O0 -c small.cpp
small.cpp:30:12: error: conflicting declaration ‘const B D::e’
const B D::e = { 0, (fp) &E::foo };
^
small.cpp:20:12: note: previous declaration as ‘B D::e’
static B e;
^
small.cpp:30:12: error: declaration of ‘B D::e’ outside of class is not
definition [-fpermissive]
const B D::e = { 0, (fp) &E::foo };
^
$
$ g++-5.3 -O1 -c small.cpp
small.cpp:30:12: error: conflicting declaration ‘const B D::e’
const B D::e = { 0, (fp) &E::foo };
^
small.cpp:20:12: note: previous declaration as ‘B D::e’
static B e;
^
small.cpp:30:12: error: declaration of ‘B D::e’ outside of class is not
definition [-fpermissive]
const B D::e = { 0, (fp) &E::foo };
^
$
$ g++-trunk -O1 -c small.cpp
small.cpp:30:12: error: conflicting declaration ‘const B D::e’
const B D::e = { 0, (fp) &E::foo };
^
small.cpp:20:12: note: previous declaration as ‘B D::e’
static B e;
^
small.cpp:30:12: error: declaration of ‘B D::e’ outside of class is not
definition [-fpermissive]
const B D::e = { 0, (fp) &E::foo };
^
cc1plus: internal compiler error: in record_reference, at cgraphbuild.c:64
0x95ef53 record_reference
../../gcc-source-trunk/gcc/cgraphbuild.c:64
0x100fec4 walk_tree_1(tree_node**, tree_node* (*)(tree_node**, int*, void*),
void*, hash_set<tree_node*, default_hash_traits<tree_node*> >*, tree_node*
(*)(tree_node**, int*, tree_node* (*)(tree_node**, int*, void*), void*,
hash_set<tree_node*, default_hash_traits<tree_node*> >*))
../../gcc-source-trunk/gcc/tree.c:11531
0x1010474 walk_tree_1(tree_node**, tree_node* (*)(tree_node**, int*, void*),
void*, hash_set<tree_node*, default_hash_traits<tree_node*> >*, tree_node*
(*)(tree_node**, int*, tree_node* (*)(tree_node**, int*, void*), void*,
hash_set<tree_node*, default_hash_traits<tree_node*> >*))
../../gcc-source-trunk/gcc/tree.c:11848
0x1010474 walk_tree_1(tree_node**, tree_node* (*)(tree_node**, int*, void*),
void*, hash_set<tree_node*, default_hash_traits<tree_node*> >*, tree_node*
(*)(tree_node**, int*, tree_node* (*)(tree_node**, int*, void*), void*,
hash_set<tree_node*, default_hash_traits<tree_node*> >*))
../../gcc-source-trunk/gcc/tree.c:11848
0x96008a record_references_in_initializer(tree_node*, bool)
../../gcc-source-trunk/gcc/cgraphbuild.c:404
0x1051957 varpool_node::analyze()
../../gcc-source-trunk/gcc/varpool.c:526
0x966359 analyze_functions
../../gcc-source-trunk/gcc/cgraphunit.c:1133
0x966f98 symbol_table::finalize_compilation_unit()
../../gcc-source-trunk/gcc/cgraphunit.c:2542
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <http://gcc.gnu.org/bugs.html> for instructions.
$
------------------------------------------
class A;
typedef void (A::*fp) (void);
struct B
{
int n;
fp f;
};
struct C
{
const C *c;
const B b;
};
class D
{
public:
static B e;
static C m;
};
class E : public D
{
public:
void foo ();
};
// OK: B D::e = { 0, (fp) &E::foo };
const B D::e = { 0, (fp) &E::foo };
C D::m = { &D::m, E::e };
