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8186027: C2: loop strip mining

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Reviewed-by: kvn, neliasso
This commit is contained in:
Roland Westrelin 2017-11-28 11:59:16 +01:00
parent 46f665881f
commit 386e258e20
17 changed files with 1150 additions and 209 deletions
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9
src/hotspot/share/opto/macro.cpp
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@ -282,7 +282,8 @@ void PhaseMacroExpand::eliminate_card_mark(Node* p2x) {
if (!this_region->in(ind)->is_IfFalse()) {
ind = 2;
}
if (this_region->in(ind)->is_IfFalse()) {
if (this_region->in(ind)->is_IfFalse() &&
this_region->in(ind)->in(0)->Opcode() == Op_If) {
Node* bol = this_region->in(ind)->in(0)->in(1);
assert(bol->is_Bool(), "");
cmpx = bol->in(1);
@ -2660,6 +2661,8 @@ void PhaseMacroExpand::eliminate_macro_nodes() {
break;
case Node::Class_ArrayCopy:
break;
case Node::Class_OuterStripMinedLoop:
break;
default:
assert(n->Opcode() == Op_LoopLimit ||
n->Opcode() == Op_Opaque1 ||
@ -2733,6 +2736,10 @@ bool PhaseMacroExpand::expand_macro_nodes() {
} else if (n->Opcode() == Op_Opaque4) {
_igvn.replace_node(n, n->in(2));
success = true;
} else if (n->Opcode() == Op_OuterStripMinedLoop) {
n->as_OuterStripMinedLoop()->adjust_strip_mined_loop(&_igvn);
C->remove_macro_node(n);
success = true;
}
assert(success == (C->macro_count() < old_macro_count), "elimination reduces macro count");
progress = progress || success;