The following invalid code snippet triggers an ICE since GCC 4.0.0:
=====================================
struct A
{
static int i;
};
int j = __builtin_offsetof(volatile A, i);
=====================================
bug.cc:6: internal compiler error: in fold_offsetof_1, at c-common.c:6316
Please submit a full bug report, [etc.]
In addition there are diagnostic issues with a similar testcase:
=====================================
struct A
{
static void foo();
};
int i = __builtin_offsetof(volatile A, foo[0]);
=====================================
bug.cc:6: error: pointer to a function used in arithmetic
bug.cc:6: error: cannot apply 'offsetof' to member function '#'compound_expr'
not supported by dump_decl#<declaration error>'
Testing a patch.
--
Summary: [4.1/4.2/4.3 regression] Trouble with __builtin_offsetof
and volatile
Product: gcc
Version: 4.3.0
Status: UNCONFIRMED
Keywords: ice-on-invalid-code, diagnostic, monitored
Severity: normal
Priority: P3
Component: c++
AssignedTo: reichelt at gcc dot gnu dot org
ReportedBy: reichelt at gcc dot gnu dot org
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=30852
