1.1 --- a/src/share/vm/opto/superword.cpp Tue Aug 21 10:48:50 2012 -0700
1.2 +++ b/src/share/vm/opto/superword.cpp Tue Aug 21 14:50:02 2012 -0700
1.3 @@ -1055,6 +1055,9 @@
1.4 // Can code be generated for pack p?
1.5 bool SuperWord::implemented(Node_List* p) {
1.6 Node* p0 = p->at(0);
1.7 + if (VectorNode::is_shift(p0) && in_bb(p0->in(2))) {
1.8 + return false; // vector shift count should be loop's invariant.
1.9 + }
1.10 return VectorNode::implemented(p0->Opcode(), p->size(), velt_basic_type(p0));
1.11 }
1.12
1.13 @@ -1404,6 +1407,7 @@
1.14
1.15 if (same_opd) {
1.16 if (opd->is_Vector() || opd->is_LoadVector()) {
1.17 + assert(((opd_idx != 2) || !VectorNode::is_shift(p0)), "shift's count can't be vector");
1.18 return opd; // input is matching vector
1.19 }
1.20 if ((opd_idx == 2) && VectorNode::is_shift(p0)) {
