Mercurial > hg > truffle
diff src/share/vm/opto/callGenerator.cpp @ 1080:7c57aead6d3e
6892658: C2 should optimize some stringbuilder patterns
Reviewed-by: kvn, twisti
author | never |
---|---|
date | Thu, 12 Nov 2009 09:24:21 -0800 |
parents | 9ee9cf798b59 |
children | 97125851f396 |
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--- a/src/share/vm/opto/callGenerator.cpp Fri Nov 27 07:56:58 2009 -0800 +++ b/src/share/vm/opto/callGenerator.cpp Thu Nov 12 09:24:21 2009 -0800 @@ -98,12 +98,21 @@ //---------------------------DirectCallGenerator------------------------------ // Internal class which handles all out-of-line calls w/o receiver type checks. class DirectCallGenerator : public CallGenerator { -public: - DirectCallGenerator(ciMethod* method) - : CallGenerator(method) + private: + CallStaticJavaNode* _call_node; + // Force separate memory and I/O projections for the exceptional + // paths to facilitate late inlinig. + bool _separate_io_proj; + + public: + DirectCallGenerator(ciMethod* method, bool separate_io_proj) + : CallGenerator(method), + _separate_io_proj(separate_io_proj) { } virtual JVMState* generate(JVMState* jvms); + + CallStaticJavaNode* call_node() const { return _call_node; } }; JVMState* DirectCallGenerator::generate(JVMState* jvms) { @@ -129,9 +138,10 @@ call->set_optimized_virtual(true); } kit.set_arguments_for_java_call(call); - kit.set_edges_for_java_call(call); - Node* ret = kit.set_results_for_java_call(call); + kit.set_edges_for_java_call(call, false, _separate_io_proj); + Node* ret = kit.set_results_for_java_call(call, _separate_io_proj); kit.push_node(method()->return_type()->basic_type(), ret); + _call_node = call; // Save the call node in case we need it later return kit.transfer_exceptions_into_jvms(); } @@ -238,9 +248,9 @@ return new ParseGenerator(m, expected_uses, true); } -CallGenerator* CallGenerator::for_direct_call(ciMethod* m) { +CallGenerator* CallGenerator::for_direct_call(ciMethod* m, bool separate_io_proj) { assert(!m->is_abstract(), "for_direct_call mismatch"); - return new DirectCallGenerator(m); + return new DirectCallGenerator(m, separate_io_proj); } CallGenerator* CallGenerator::for_virtual_call(ciMethod* m, int vtable_index) { @@ -248,6 +258,108 @@ return new VirtualCallGenerator(m, vtable_index); } +// Allow inlining decisions to be delayed +class LateInlineCallGenerator : public DirectCallGenerator { + CallGenerator* _inline_cg; + + public: + LateInlineCallGenerator(ciMethod* method, CallGenerator* inline_cg) : + DirectCallGenerator(method, true), _inline_cg(inline_cg) {} + + virtual bool is_late_inline() const { return true; } + + // Convert the CallStaticJava into an inline + virtual void do_late_inline(); + + JVMState* generate(JVMState* jvms) { + // Record that this call site should be revisited once the main + // parse is finished. + Compile::current()->add_late_inline(this); + + // Emit the CallStaticJava and request separate projections so + // that the late inlining logic can distinguish between fall + // through and exceptional uses of the memory and io projections + // as is done for allocations and macro expansion. + return DirectCallGenerator::generate(jvms); + } + +}; + + +void LateInlineCallGenerator::do_late_inline() { + // Can't inline it + if (call_node() == NULL || call_node()->outcnt() == 0 || + call_node()->in(0) == NULL || call_node()->in(0)->is_top()) + return; + + CallStaticJavaNode* call = call_node(); + + // Make a clone of the JVMState that appropriate to use for driving a parse + Compile* C = Compile::current(); + JVMState* jvms = call->jvms()->clone_shallow(C); + uint size = call->req(); + SafePointNode* map = new (C, size) SafePointNode(size, jvms); + for (uint i1 = 0; i1 < size; i1++) { + map->init_req(i1, call->in(i1)); + } + + // Make sure the state is a MergeMem for parsing. + if (!map->in(TypeFunc::Memory)->is_MergeMem()) { + map->set_req(TypeFunc::Memory, MergeMemNode::make(C, map->in(TypeFunc::Memory))); + } + + // Make enough space for the expression stack and transfer the incoming arguments + int nargs = method()->arg_size(); + jvms->set_map(map); + map->ensure_stack(jvms, jvms->method()->max_stack()); + if (nargs > 0) { + for (int i1 = 0; i1 < nargs; i1++) { + map->set_req(i1 + jvms->argoff(), call->in(TypeFunc::Parms + i1)); + } + } + + CompileLog* log = C->log(); + if (log != NULL) { + log->head("late_inline method='%d'", log->identify(method())); + JVMState* p = jvms; + while (p != NULL) { + log->elem("jvms bci='%d' method='%d'", p->bci(), log->identify(p->method())); + p = p->caller(); + } + log->tail("late_inline"); + } + + // Setup default node notes to be picked up by the inlining + Node_Notes* old_nn = C->default_node_notes(); + if (old_nn != NULL) { + Node_Notes* entry_nn = old_nn->clone(C); + entry_nn->set_jvms(jvms); + C->set_default_node_notes(entry_nn); + } + + // Now perform the inling using the synthesized JVMState + JVMState* new_jvms = _inline_cg->generate(jvms); + if (new_jvms == NULL) return; // no change + if (C->failing()) return; + + // Capture any exceptional control flow + GraphKit kit(new_jvms); + + // Find the result object + Node* result = C->top(); + int result_size = method()->return_type()->size(); + if (result_size != 0 && !kit.stopped()) { + result = (result_size == 1) ? kit.pop() : kit.pop_pair(); + } + + kit.replace_call(call, result); +} + + +CallGenerator* CallGenerator::for_late_inline(ciMethod* method, CallGenerator* inline_cg) { + return new LateInlineCallGenerator(method, inline_cg); +} + //---------------------------WarmCallGenerator-------------------------------- // Internal class which handles initial deferral of inlining decisions. @@ -315,70 +427,7 @@ } void WarmCallInfo::make_hot() { - Compile* C = Compile::current(); - // Replace the callnode with something better. - CallJavaNode* call = this->call()->as_CallJava(); - ciMethod* method = call->method(); - int nargs = method->arg_size(); - JVMState* jvms = call->jvms()->clone_shallow(C); - uint size = TypeFunc::Parms + MAX2(2, nargs); - SafePointNode* map = new (C, size) SafePointNode(size, jvms); - for (uint i1 = 0; i1 < (uint)(TypeFunc::Parms + nargs); i1++) { - map->init_req(i1, call->in(i1)); - } - jvms->set_map(map); - jvms->set_offsets(map->req()); - jvms->set_locoff(TypeFunc::Parms); - jvms->set_stkoff(TypeFunc::Parms); - GraphKit kit(jvms); - - JVMState* new_jvms = _hot_cg->generate(kit.jvms()); - if (new_jvms == NULL) return; // no change - if (C->failing()) return; - - kit.set_jvms(new_jvms); - Node* res = C->top(); - int res_size = method->return_type()->size(); - if (res_size != 0) { - kit.inc_sp(-res_size); - res = kit.argument(0); - } - GraphKit ekit(kit.combine_and_pop_all_exception_states()->jvms()); - - // Replace the call: - for (DUIterator i = call->outs(); call->has_out(i); i++) { - Node* n = call->out(i); - Node* nn = NULL; // replacement - if (n->is_Proj()) { - ProjNode* nproj = n->as_Proj(); - assert(nproj->_con < (uint)(TypeFunc::Parms + (res_size ? 1 : 0)), "sane proj"); - if (nproj->_con == TypeFunc::Parms) { - nn = res; - } else { - nn = kit.map()->in(nproj->_con); - } - if (nproj->_con == TypeFunc::I_O) { - for (DUIterator j = nproj->outs(); nproj->has_out(j); j++) { - Node* e = nproj->out(j); - if (e->Opcode() == Op_CreateEx) { - e->replace_by(ekit.argument(0)); - } else if (e->Opcode() == Op_Catch) { - for (DUIterator k = e->outs(); e->has_out(k); k++) { - CatchProjNode* p = e->out(j)->as_CatchProj(); - if (p->is_handler_proj()) { - p->replace_by(ekit.control()); - } else { - p->replace_by(kit.control()); - } - } - } - } - } - } - NOT_PRODUCT(if (!nn) n->dump(2)); - assert(nn != NULL, "don't know what to do with this user"); - n->replace_by(nn); - } + Unimplemented(); } void WarmCallInfo::make_cold() {