archive/jdk
1
0
Fork 0
mirror of https://github.com/openjdk/jdk.git synced 2025-09-21 03:24:38 +02:00
Code Issues Projects Releases Packages Wiki Activity Actions

8024070: C2 needs some form of type speculation

Browse source 
Record unused type profile information with type system, propagate and use it.

Reviewed-by: kvn, twisti
This commit is contained in:
Roland Westrelin 2013-10-23 12:40:23 +02:00
parent ceb177b16f
commit 1b5bd82335
22 changed files with 1429 additions and 144 deletions
Download patch file Download diff file Expand all files Collapse all files

10
hotspot/src/share/vm/opto/callGenerator.cpp
View file

@ -486,6 +486,8 @@ class LateInlineStringCallGenerator : public LateInlineCallGenerator {
JVMState* new_jvms = DirectCallGenerator::generate(jvms, parent_parser);
return new_jvms;
}
virtual bool is_string_late_inline() const { return true; }
};
CallGenerator* CallGenerator::for_string_late_inline(ciMethod* method, CallGenerator* inline_cg) {
@ -773,7 +775,7 @@ CallGenerator* CallGenerator::for_method_handle_inline(JVMState* jvms, ciMethod*
ciMethod* target = oop_ptr->const_oop()->as_method_handle()->get_vmtarget();
guarantee(!target->is_method_handle_intrinsic(), "should not happen"); // XXX remove
const int vtable_index = Method::invalid_vtable_index;
CallGenerator* cg = C->call_generator(target, vtable_index, false, jvms, true, PROB_ALWAYS, true, true);
CallGenerator* cg = C->call_generator(target, vtable_index, false, jvms, true, PROB_ALWAYS, NULL, true, true);
assert(!cg->is_late_inline() || cg->is_mh_late_inline(), "no late inline here");
if (cg != NULL && cg->is_inline())
return cg;
@ -829,6 +831,7 @@ CallGenerator* CallGenerator::for_method_handle_inline(JVMState* jvms, ciMethod*
int vtable_index = Method::invalid_vtable_index;
bool call_does_dispatch = false;
ciKlass* speculative_receiver_type = NULL;
if (is_virtual_or_interface) {
ciInstanceKlass* klass = target->holder();
Node* receiver_node = kit.argument(0);
@ -837,9 +840,12 @@ CallGenerator* CallGenerator::for_method_handle_inline(JVMState* jvms, ciMethod*
target = C->optimize_virtual_call(caller, jvms->bci(), klass, target, receiver_type,
is_virtual,
call_does_dispatch, vtable_index); // out-parameters
// We lack profiling at this call but type speculation may
// provide us with a type
speculative_receiver_type = receiver_type->speculative_type();
}
CallGenerator* cg = C->call_generator(target, vtable_index, call_does_dispatch, jvms, true, PROB_ALWAYS, true, true);
CallGenerator* cg = C->call_generator(target, vtable_index, call_does_dispatch, jvms, true, PROB_ALWAYS, speculative_receiver_type, true, true);
assert(!cg->is_late_inline() || cg->is_mh_late_inline(), "no late inline here");
if (cg != NULL && cg->is_inline())
return cg;