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6671807: (Escape Analysis) Add new ideal node to represent the state of a scalarized object at a safepoint

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Values of non-static fields of a scalarized object should be saved in debug info to reallocate the object during deoptimization.

Reviewed-by: never
This commit is contained in:
Vladimir Kozlov 2008-03-13 16:06:34 -07:00
parent 1931e94bad
commit 000ac830a0
9 changed files with 322 additions and 26 deletions
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17
hotspot/src/share/vm/opto/macro.cpp
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@ -54,15 +54,30 @@ void PhaseMacroExpand::copy_call_debug_info(CallNode *oldcall, CallNode * newcal
uint new_dbg_start = newcall->tf()->domain()->cnt();
int jvms_adj = new_dbg_start - old_dbg_start;
assert (new_dbg_start == newcall->req(), "argument count mismatch");
Dict* sosn_map = new Dict(cmpkey,hashkey);
for (uint i = old_dbg_start; i < oldcall->req(); i++) {
newcall->add_req(oldcall->in(i));
Node* old_in = oldcall->in(i);
// Clone old SafePointScalarObjectNodes, adjusting their field contents.
if (old_in->is_SafePointScalarObject()) {
SafePointScalarObjectNode* old_sosn = old_in->as_SafePointScalarObject();
uint old_unique = C->unique();
Node* new_in = old_sosn->clone(jvms_adj, sosn_map);
if (old_unique != C->unique()) {
new_in = transform_later(new_in); // Register new node.
}
old_in = new_in;
}
newcall->add_req(old_in);
}
newcall->set_jvms(oldcall->jvms());
for (JVMState *jvms = newcall->jvms(); jvms != NULL; jvms = jvms->caller()) {
jvms->set_map(newcall);
jvms->set_locoff(jvms->locoff()+jvms_adj);
jvms->set_stkoff(jvms->stkoff()+jvms_adj);
jvms->set_monoff(jvms->monoff()+jvms_adj);
jvms->set_scloff(jvms->scloff()+jvms_adj);
jvms->set_endoff(jvms->endoff()+jvms_adj);
}
}