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8259430: C2: assert(in_vt->length() == out_vt->length()) failed: mismatch on number of elements

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Reviewed-by: kvn, thartmann
This commit is contained in:
Vladimir Ivanov 2021-02-11 10:16:09 +00:00
parent 1662373400
commit 3ede231dec
2 changed files with 20 additions and 16 deletions
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35
src/hotspot/share/opto/vectornode.cpp
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@ -1225,25 +1225,30 @@ Node* VectorUnboxNode::Ideal(PhaseGVN* phase, bool can_reshape) {
ciKlass* vbox_klass = vbox->box_type()->klass();
const TypeVect* in_vt = vbox->vec_type();
const TypeVect* out_vt = type()->is_vect();
assert(in_vt->length() == out_vt->length(), "mismatch on number of elements");
Node* value = vbox->in(VectorBoxNode::Value);
bool is_vector_mask = vbox_klass->is_subclass_of(ciEnv::current()->vector_VectorMask_klass());
bool is_vector_shuffle = vbox_klass->is_subclass_of(ciEnv::current()->vector_VectorShuffle_klass());
if (is_vector_mask) {
// VectorUnbox (VectorBox vmask) ==> VectorLoadMask (VectorStoreMask vmask)
value = phase->transform(VectorStoreMaskNode::make(*phase, value, in_vt->element_basic_type(), in_vt->length()));
return new VectorLoadMaskNode(value, out_vt);
} else if (is_vector_shuffle) {
if (is_shuffle_to_vector()) {
// VectorUnbox (VectorBox vshuffle) ==> VectorCastB2X vshuffle
return new VectorCastB2XNode(value, out_vt);
if (in_vt->length() == out_vt->length()) {
Node* value = vbox->in(VectorBoxNode::Value);
bool is_vector_mask = vbox_klass->is_subclass_of(ciEnv::current()->vector_VectorMask_klass());
bool is_vector_shuffle = vbox_klass->is_subclass_of(ciEnv::current()->vector_VectorShuffle_klass());
if (is_vector_mask) {
// VectorUnbox (VectorBox vmask) ==> VectorLoadMask (VectorStoreMask vmask)
value = phase->transform(VectorStoreMaskNode::make(*phase, value, in_vt->element_basic_type(), in_vt->length()));
return new VectorLoadMaskNode(value, out_vt);
} else if (is_vector_shuffle) {
if (is_shuffle_to_vector()) {
// VectorUnbox (VectorBox vshuffle) ==> VectorCastB2X vshuffle
return new VectorCastB2XNode(value, out_vt);
} else {
// VectorUnbox (VectorBox vshuffle) ==> VectorLoadShuffle vshuffle
return new VectorLoadShuffleNode(value, out_vt);
}
} else {
// VectorUnbox (VectorBox vshuffle) ==> VectorLoadShuffle vshuffle
return new VectorLoadShuffleNode(value, out_vt);
// Vector type mismatch is only supported for masks and shuffles, but sometimes it happens in pathological cases.
}
} else {
assert(false, "type mismatch on vector: %s", vbox_klass->name()->as_utf8());
// Vector length mismatch.
// Sometimes happen in pathological cases (e.g., when unboxing happens in effectively dead code).
}
}
}