https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69053
Bug ID: 69053
Summary: [6 Regression] ICE in build_vector_from_val
Product: gcc
Version: 6.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: miyuki at gcc dot gnu.org
CC: alan.lawrence at arm dot com
Target Milestone: ---
Target: x86_64-*-*
Starting with r230423 the following testcase causes an ICE:
$ cat genattrtab.cc
struct A {
int *elem[1];
};
int a, d, e;
A *b;
int *c;
int main()
{
int *f = 0;
for (; e; e++)
if (b->elem[e])
f = c;
if (f)
a = d;
}
$ cc1plus -march=core-avx2 -quiet -O3 genattrtab.cc
genattrtab.cc: In function 'int main()':
genattrtab.cc:7:5: internal compiler error: in build_vector_from_val, at
tree.c:1754
int main()
^~~~
0xf62595 build_vector_from_val(tree_node*, tree_node*)
/home/miyuki/gcc/src/gcc/tree.c:1753
0xf0c94a get_initial_def_for_reduction(gimple*, tree_node*, tree_node**)
/home/miyuki/gcc/src/gcc/tree-vect-loop.c:4120
0x5b809a vect_create_epilog_for_reduction
/home/miyuki/gcc/src/gcc/tree-vect-loop.c:4283
0xf0e65d vectorizable_reduction(gimple*, gimple_stmt_iterator*, gimple**,
_slp_tree*)
/home/miyuki/gcc/src/gcc/tree-vect-loop.c:6100
0xf05e30 vect_transform_stmt(gimple*, gimple_stmt_iterator*, bool*, _slp_tree*,
_slp_instance*)
/home/miyuki/gcc/src/gcc/tree-vect-stmts.c:8048
0xf0be72 vect_transform_loop(_loop_vec_info*)
/home/miyuki/gcc/src/gcc/tree-vect-loop.c:6793
0xf27537 vectorize_loops()
/home/miyuki/gcc/src/gcc/tree-vectorizer.c:548
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.
