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8260370: C2: LoopLimit node is not eliminated

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Reviewed-by: kvn, thartmann
This commit is contained in:
Vladimir Ivanov 2021-01-27 10:29:59 +00:00
parent 408772c966
commit e28e11119d
2 changed files with 9 additions and 1 deletions
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7
src/hotspot/share/opto/compile.cpp
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@ -1840,6 +1840,8 @@ void Compile::process_for_post_loop_opts_igvn(PhaseIterGVN& igvn) {
C->set_post_loop_opts_phase(); // no more loop opts allowed
assert(!C->major_progress(), "not cleared");
if (_for_post_loop_igvn.length() > 0) {
while (_for_post_loop_igvn.length() > 0) {
Node* n = _for_post_loop_igvn.pop();
@ -1848,6 +1850,11 @@ void Compile::process_for_post_loop_opts_igvn(PhaseIterGVN& igvn) {
}
igvn.optimize();
assert(_for_post_loop_igvn.length() == 0, "no more delayed nodes allowed");
// Sometimes IGVN sets major progress (e.g., when processing loop nodes).
if (C->major_progress()) {
C->clear_major_progress(); // ensure that major progress is now clear
}
}
}