https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63563
Bug ID: 63563
Summary: [4.9/5 Regression] ICE: in vectorizable_store, at
tree-vect-stmts.c:5106 with -mavx2
Product: gcc
Version: 4.9.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: trippels at gcc dot gnu.org
A gentoo user emailed me the following testcase:
markus@x4 ~ % cat blub.ii
struct A
{
unsigned long m_count;
unsigned long m_sum;
unsigned long m_min;
unsigned long m_max;
void
m_fn1 (A *p1)
{
m_count = m_sum = m_min = p1->m_min;
if (__builtin_expect (m_max, 0))
m_max = p1->m_max;
}
};
struct B
{
A m_stat[];
void
m_fn2 ()
{
A *a = &m_stat[0];
A b, c = m_stat[0];
for (; a < &b; a++)
a->m_fn1 (&c);
}
};
struct C
{
B m_lock_stat;
void
m_fn3 ()
{
m_lock_stat.m_fn2 ();
}
};
struct PFS_table_share
{
C m_table_stat;
} d;
void
PFS_tablesafe_aggregate_io ()
{
d.m_table_stat.m_fn3 ();
}
markus@x4 ~ % g++ -O3 -mavx2 -c blub.ii
blub.ii: In function ‘void PFS_tablesafe_aggregate_io()’:
blub.ii:41:1: internal compiler error: in vectorizable_store, at
tree-vect-stmts.c:5106
PFS_tablesafe_aggregate_io ()
^
0xdeba83 vectorizable_store
../../gcc/gcc/tree-vect-stmts.c:5106
0xdf0371 vect_analyze_stmt(gimple_statement_base*, bool*, _slp_tree*)
../../gcc/gcc/tree-vect-stmts.c:7105
0xdfbc91 vect_analyze_loop_operations
../../gcc/gcc/tree-vect-loop.c:1505
0xdfbc91 vect_analyze_loop_2
../../gcc/gcc/tree-vect-loop.c:1766
0xdfbc91 vect_analyze_loop(loop*)
../../gcc/gcc/tree-vect-loop.c:1864
0xe113f7 vectorize_loops()
../../gcc/gcc/tree-vectorizer.c:432
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.
