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8341525: G1: use bit clearing to remove tightly-coupled initialization store pre-barriers

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Reviewed-by: mdoerr, kbarrett, shade, tschatzl
This commit is contained in:
Roberto Castañeda Lozano 2024-10-07 08:28:18 +00:00
parent 92186a2774
commit 81ebbb2463
1 changed files with 2 additions and 1 deletions
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src/hotspot/share/gc/g1/c2/g1BarrierSetC2.cpp
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@ -332,7 +332,8 @@ Node* G1BarrierSetC2::store_at_resolved(C2Access& access, C2AccessValue& val) co
if (tightly_coupled_alloc) { if (tightly_coupled_alloc) {
assert(!use_ReduceInitialCardMarks(), assert(!use_ReduceInitialCardMarks(),
"post-barriers are only needed for tightly-coupled initialization stores when ReduceInitialCardMarks is disabled"); "post-barriers are only needed for tightly-coupled initialization stores when ReduceInitialCardMarks is disabled");
access.set_barrier_data(access.barrier_data() ^ G1C2BarrierPre); // Pre-barriers are unnecessary for tightly-coupled initialization stores.
access.set_barrier_data(access.barrier_data() & ~G1C2BarrierPre);
} }
} }
return BarrierSetC2::store_at_resolved(access, val); return BarrierSetC2::store_at_resolved(access, val);