8262298: G1BarrierSetC2::step_over_gc_barrier fails with assert "bad …

…barrier shape" Reviewed-by: kvn, vlivanov
openjdk · Mar 17, 2021 · cdf78e4 · cdf78e4 · openjdk-notifier · Mar 17, 2021
1 parent 7674da4
commit cdf78e4
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/src/hotspot/share/gc/g1/c2/g1BarrierSetC2.cpp b/src/hotspot/share/gc/g1/c2/g1BarrierSetC2.cpp
@@ -759,7 +759,7 @@ Node* G1BarrierSetC2::step_over_gc_barrier(Node* c) const {
               r->in(j)->in(0)->as_Call()->entry_point() == CAST_FROM_FN_PTR(address, G1BarrierSetRuntime::write_ref_field_post_entry)) {
             Node* call = r->in(j)->in(0);
             c = c->in(i == 1 ? 2 : 1);
-            if (c != NULL) {
+            if (c != NULL && c->Opcode() != Op_Parm) {
               c = c->in(0);
               if (c != NULL) {
                 c = c->in(0);