This is the mail archive of the
gcc-bugs@gcc.gnu.org
mailing list for the GCC project.
[Bug tree-optimization/35011] New: [4.3 regression] ICE with -fcheck-data-deps
- From: "reichelt at gcc dot gnu dot org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 29 Jan 2008 08:56:19 -0000
- Subject: [Bug tree-optimization/35011] New: [4.3 regression] ICE with -fcheck-data-deps
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
The following testcase triggers an ICE when compiled with
"-O3 -fcheck-data-deps":
==========================================================================
double foo(const double* p0, const double* p1, const double* q0)
{
double d;
for (; p0 != p1; ++p0, ++q0)
d += *p0 * *q0;
return d;
}
struct A
{
double x[3];
const double* begin() const { return x; }
};
struct B
{
A a0, a1;
double d;
B(const A&);
};
B::B(const A& a) : a0(a), a1(a), d(foo(a0.begin(), a0.begin()+3, a1.begin()))
{}
==========================================================================
(Number of distance vectors differ: Banerjee has 1, Omega has 0.
Banerjee dist vectors:
3
Omega dist vectors:
data dependence relation:
(Data Dep:
access_fn_A: {0B, +, 8}_1
access_fn_B: {24B, +, 8}_1
(subscript
iterations_that_access_an_element_twice_in_A: [3 + 1 * x_1]
last_conflict: 0
iterations_that_access_an_element_twice_in_B: [0 + 1 * x_1]
last_conflict: 0
(Subscript distance: 3
)
)
inner loop index: 0
loop nest: (1 )
)
)
bug.cc: In constructor 'B::B(const A&)':
bug.cc:22: internal compiler error: in compute_affine_dependence, at
tree-data-ref.c:3849
Please submit a full bug report, [etc.]
--
Summary: [4.3 regression] ICE with -fcheck-data-deps
Product: gcc
Version: 4.3.0
Status: UNCONFIRMED
Keywords: ice-on-valid-code
Severity: normal
Priority: P3
Component: tree-optimization
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: reichelt at gcc dot gnu dot org
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=35011