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8271600: C2: CheckCastPP which should closely follow Allocate is sunk of a loop

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Reviewed-by: chagedorn, roland
This commit is contained in:
Vladimir Ivanov 2021-08-23 20:23:41 +00:00
parent ad92033fcc
commit 2ff4c01d42
1 changed files with 4 additions and 0 deletions
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4
src/hotspot/share/opto/loopopts.cpp
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@ -1435,12 +1435,16 @@ void PhaseIdealLoop::split_if_with_blocks_post(Node *n) {
// like various versions of induction variable+offset. Clone the
// computation per usage to allow it to sink out of the loop.
void PhaseIdealLoop::try_sink_out_of_loop(Node* n) {
bool is_raw_to_oop_cast = n->is_ConstraintCast() &&
n->in(1)->bottom_type()->isa_rawptr() &&
!n->bottom_type()->isa_rawptr();
if (has_ctrl(n) &&
!n->is_Phi() &&
!n->is_Bool() &&
!n->is_Proj() &&
!n->is_MergeMem() &&
!n->is_CMove() &&
!is_raw_to_oop_cast && // don't extend live ranges of raw oops
n->Opcode() != Op_Opaque4) {
Node *n_ctrl = get_ctrl(n);
IdealLoopTree *n_loop = get_loop(n_ctrl);