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8256655: rework long counted loop handling

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Reviewed-by: kvn, thartmann, vlivanov
This commit is contained in:
Roland Westrelin 2020-12-01 07:30:51 +00:00
parent 13bd2e82ca
commit 3d460bd295
25 changed files with 755 additions and 465 deletions
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3
src/hotspot/share/opto/compile.cpp
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@ -3395,6 +3395,7 @@ void Compile::final_graph_reshaping_main_switch(Node* n, Final_Reshape_Counts& f
case Op_Loop:
assert(!n->as_Loop()->is_transformed_long_loop() || _loop_opts_cnt == 0, "should have been turned into a counted loop");
case Op_CountedLoop:
case Op_LongCountedLoop:
case Op_OuterStripMinedLoop:
if (n->as_Loop()->is_inner_loop()) {
frc.inc_inner_loop_count();
@ -3713,7 +3714,7 @@ bool Compile::final_graph_reshaping() {
// Here so verification code in final_graph_reshaping_walk()
// always see an OuterStripMinedLoopEnd
if (n->is_OuterStripMinedLoopEnd()) {
if (n->is_OuterStripMinedLoopEnd() || n->is_LongCountedLoopEnd()) {
IfNode* init_iff = n->as_If();
Node* iff = new IfNode(init_iff->in(0), init_iff->in(1), init_iff->_prob, init_iff->_fcnt);
n->subsume_by(iff, this);