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8136725: Provide utility for creation a counted loop reserve copy (clone)

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Make it easier to revert to the original loop should that be needed

Reviewed-by: kvn
This commit is contained in:
Jan Civlin 2015-10-09 12:17:58 -07:00 • committed by Igor Veresov
parent 4c20e17d0a
commit 115afda88e
5 changed files with 253 additions and 1 deletions
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41
hotspot/src/share/vm/opto/superword.cpp
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@ -81,6 +81,10 @@ SuperWord::SuperWord(PhaseIdealLoop* phase) :
if (_phase->C->method() != NULL) {
_phase->C->method()->has_option_value("VectorizeDebug", _vector_loop_debug);
}
_CountedLoopReserveKit_debug = 0;
if (_phase->C->method() != NULL) {
_phase->C->method()->has_option_value("DoReserveCopyInSuperWordDebug", _CountedLoopReserveKit_debug);
}
#endif
}
@ -1763,6 +1767,22 @@ void SuperWord::co_locate_pack(Node_List* pk) {
}
}
#ifndef PRODUCT
void SuperWord::print_loop(bool whole) {
Node_Stack stack(_arena, _phase->C->unique() >> 2);
Node_List rpo_list;
VectorSet visited(_arena);
visited.set(lpt()->_head->_idx);
_phase->rpo(lpt()->_head, stack, visited, rpo_list);
_phase->dump(lpt(), rpo_list.size(), rpo_list );
if(whole) {
tty->print_cr("\n Whole loop tree");
_phase->dump();
tty->print_cr(" End of whole loop tree\n");
}
}
#endif
//------------------------------output---------------------------
// Convert packs into vector node operations
void SuperWord::output() {
@ -1770,7 +1790,7 @@ void SuperWord::output() {
#ifndef PRODUCT
if (TraceLoopOpts) {
tty->print("SuperWord ");
tty->print("SuperWord::output ");
lpt()->dump_head();
}
#endif
@ -1789,6 +1809,18 @@ void SuperWord::output() {
CountedLoopNode *cl = lpt()->_head->as_CountedLoop();
uint max_vlen_in_bytes = 0;
uint max_vlen = 0;
NOT_PRODUCT(if(_CountedLoopReserveKit_debug > 0) {tty->print_cr("SWPointer::output: print loop before create_reserve_version_of_loop"); print_loop(true);})
CountedLoopReserveKit make_reversable(_phase, _lpt, DoReserveCopyInSuperWord);
NOT_PRODUCT(if(_CountedLoopReserveKit_debug > 0) {tty->print_cr("SWPointer::output: print loop after create_reserve_version_of_loop"); print_loop(true);})
if (DoReserveCopyInSuperWord && !make_reversable.has_reserved()) {
NOT_PRODUCT({tty->print_cr("SWPointer::output: loop was not reserved correctly, exiting SuperWord");})
return;
}
for (int i = 0; i < _block.length(); i++) {
Node* n = _block.at(i);
Node_List* p = my_pack(n);
@ -1888,6 +1920,7 @@ void SuperWord::output() {
}
}
C->set_max_vector_size(max_vlen_in_bytes);
if (SuperWordLoopUnrollAnalysis) {
if (cl->has_passed_slp()) {
uint slp_max_unroll_factor = cl->slp_max_unroll();
@ -1900,6 +1933,12 @@ void SuperWord::output() {
}
}
}
if (DoReserveCopyInSuperWord) {
make_reversable.use_new();
}
NOT_PRODUCT(if(_CountedLoopReserveKit_debug > 0) {tty->print_cr("\n Final loop after SuperWord"); print_loop(true);})
return;
}
//------------------------------vector_opd---------------------------