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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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8
hotspot/src/share/vm/opto/graphKit.cpp
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@ -857,6 +857,13 @@ void GraphKit::add_safepoint_edges(SafePointNode* call, bool must_throw) {
for (j = 0; j < l; j++)
call->set_req(p++, in_map->in(k+j));
// Copy any scalar object fields.
k = in_jvms->scloff();
l = in_jvms->scl_size();
out_jvms->set_scloff(p);
for (j = 0; j < l; j++)
call->set_req(p++, in_map->in(k+j));
// Finish the new jvms.
out_jvms->set_endoff(p);
@ -864,6 +871,7 @@ void GraphKit::add_safepoint_edges(SafePointNode* call, bool must_throw) {
assert(out_jvms->depth() == in_jvms->depth(), "depth must match");
assert(out_jvms->loc_size() == in_jvms->loc_size(), "size must match");
assert(out_jvms->mon_size() == in_jvms->mon_size(), "size must match");
assert(out_jvms->scl_size() == in_jvms->scl_size(), "size must match");
assert(out_jvms->debug_size() == in_jvms->debug_size(), "size must match");
// Update the two tail pointers in parallel.