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8022783: Nashorn test fails with: assert(!def_outside->member(r))

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Enables private copies of inputs for recent spill copies as well

Reviewed-by: kvn, twisti
This commit is contained in:
Niclas Adlertz 2013-10-18 10:50:17 +02:00
parent 0e8081e57b
commit 3838ed7b68
2 changed files with 5 additions and 21 deletions
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6
hotspot/src/share/vm/adlc/formssel.cpp
View file

@ -536,12 +536,6 @@ bool InstructForm::rematerialize(FormDict &globals, RegisterForm *registers ) {
if( data_type != Form::none )
rematerialize = true;
// Ugly: until a better fix is implemented, disable rematerialization for
// negD nodes because they are proved to be problematic.
if (is_ideal_negD()) {
return false;
}
// Constants
if( _components.count() == 1 && _components[0]->is(Component::USE_DEF) )
rematerialize = true;

20
hotspot/src/share/vm/opto/reg_split.cpp
View file

@ -51,15 +51,6 @@
static const char out_of_nodes[] = "out of nodes during split";
static bool contains_no_live_range_input(const Node* def) {
for (uint i = 1; i < def->req(); ++i) {
if (def->in(i) != NULL && def->in_RegMask(i).is_NotEmpty()) {
return false;
}
}
return true;
}
//------------------------------get_spillcopy_wide-----------------------------
// Get a SpillCopy node with wide-enough masks. Use the 'wide-mask', the
// wide ideal-register spill-mask if possible. If the 'wide-mask' does
@ -326,12 +317,11 @@ Node *PhaseChaitin::split_Rematerialize( Node *def, Block *b, uint insidx, uint
if( def->req() > 1 ) {
for( uint i = 1; i < def->req(); i++ ) {
Node *in = def->in(i);
// Check for single-def (LRG cannot redefined)
uint lidx = _lrg_map.live_range_id(in);
if (lidx >= _lrg_map.max_lrg_id()) {
continue; // Value is a recent spill-copy
}
if (lrgs(lidx).is_singledef()) {
// We do not need this for live ranges that are only defined once.
// However, this is not true for spill copies that are added in this
// Split() pass, since they might get coalesced later on in this pass.
if (lidx < _lrg_map.max_lrg_id() && lrgs(lidx).is_singledef()) {
continue;
}
@ -1327,7 +1317,7 @@ uint PhaseChaitin::Split(uint maxlrg, ResourceArea* split_arena) {
Node *def = Reaches[pidx][slidx];
assert( def, "must have reaching def" );
// If input up/down sense and reg-pressure DISagree
if (def->rematerialize() && contains_no_live_range_input(def)) {
if (def->rematerialize()) {
// Place the rematerialized node above any MSCs created during
// phi node splitting. end_idx points at the insertion point
// so look at the node before it.