diff options
author | never <none@none> | 2009-11-12 09:24:21 -0800 |
---|---|---|
committer | never <none@none> | 2009-11-12 09:24:21 -0800 |
commit | d156d3d6a03f231076a0b2752e511f07fb421d1e (patch) | |
tree | 16db82a4764794dcace8c7e7d10edf4a6f16f460 /src/share/vm/opto/graphKit.cpp | |
parent | 90991b04f6e3a5d378ec7ae0b51d7651180285d9 (diff) |
6892658: C2 should optimize some stringbuilder patterns
Reviewed-by: kvn, twisti
Diffstat (limited to 'src/share/vm/opto/graphKit.cpp')
-rw-r--r-- | src/share/vm/opto/graphKit.cpp | 75 |
1 files changed, 67 insertions, 8 deletions
diff --git a/src/share/vm/opto/graphKit.cpp b/src/share/vm/opto/graphKit.cpp index b63aae489..1b5eb5442 100644 --- a/src/share/vm/opto/graphKit.cpp +++ b/src/share/vm/opto/graphKit.cpp @@ -1351,8 +1351,8 @@ void GraphKit::set_all_memory(Node* newmem) { } //------------------------------set_all_memory_call---------------------------- -void GraphKit::set_all_memory_call(Node* call) { - Node* newmem = _gvn.transform( new (C, 1) ProjNode(call, TypeFunc::Memory) ); +void GraphKit::set_all_memory_call(Node* call, bool separate_io_proj) { + Node* newmem = _gvn.transform( new (C, 1) ProjNode(call, TypeFunc::Memory, separate_io_proj) ); set_all_memory(newmem); } @@ -1573,7 +1573,7 @@ void GraphKit::set_arguments_for_java_call(CallJavaNode* call) { //---------------------------set_edges_for_java_call--------------------------- // Connect a newly created call into the current JVMS. // A return value node (if any) is returned from set_edges_for_java_call. -void GraphKit::set_edges_for_java_call(CallJavaNode* call, bool must_throw) { +void GraphKit::set_edges_for_java_call(CallJavaNode* call, bool must_throw, bool separate_io_proj) { // Add the predefined inputs: call->init_req( TypeFunc::Control, control() ); @@ -1595,13 +1595,13 @@ void GraphKit::set_edges_for_java_call(CallJavaNode* call, bool must_throw) { // Re-use the current map to produce the result. set_control(_gvn.transform(new (C, 1) ProjNode(call, TypeFunc::Control))); - set_i_o( _gvn.transform(new (C, 1) ProjNode(call, TypeFunc::I_O ))); - set_all_memory_call(xcall); + set_i_o( _gvn.transform(new (C, 1) ProjNode(call, TypeFunc::I_O , separate_io_proj))); + set_all_memory_call(xcall, separate_io_proj); //return xcall; // no need, caller already has it } -Node* GraphKit::set_results_for_java_call(CallJavaNode* call) { +Node* GraphKit::set_results_for_java_call(CallJavaNode* call, bool separate_io_proj) { if (stopped()) return top(); // maybe the call folded up? // Capture the return value, if any. @@ -1614,8 +1614,15 @@ Node* GraphKit::set_results_for_java_call(CallJavaNode* call) { // Note: Since any out-of-line call can produce an exception, // we always insert an I_O projection from the call into the result. - make_slow_call_ex(call, env()->Throwable_klass(), false); + make_slow_call_ex(call, env()->Throwable_klass(), separate_io_proj); + if (separate_io_proj) { + // The caller requested separate projections be used by the fall + // through and exceptional paths, so replace the projections for + // the fall through path. + set_i_o(_gvn.transform( new (C, 1) ProjNode(call, TypeFunc::I_O) )); + set_all_memory(_gvn.transform( new (C, 1) ProjNode(call, TypeFunc::Memory) )); + } return ret; } @@ -1678,6 +1685,59 @@ void GraphKit::set_predefined_output_for_runtime_call(Node* call, } } + +// Replace the call with the current state of the kit. +void GraphKit::replace_call(CallNode* call, Node* result) { + JVMState* ejvms = NULL; + if (has_exceptions()) { + ejvms = transfer_exceptions_into_jvms(); + } + + SafePointNode* final_state = stop(); + + // Find all the needed outputs of this call + CallProjections callprojs; + call->extract_projections(&callprojs, true); + + // Replace all the old call edges with the edges from the inlining result + C->gvn_replace_by(callprojs.fallthrough_catchproj, final_state->in(TypeFunc::Control)); + C->gvn_replace_by(callprojs.fallthrough_memproj, final_state->in(TypeFunc::Memory)); + C->gvn_replace_by(callprojs.fallthrough_ioproj, final_state->in(TypeFunc::I_O)); + + // Replace the result with the new result if it exists and is used + if (callprojs.resproj != NULL && result != NULL) { + C->gvn_replace_by(callprojs.resproj, result); + } + + if (ejvms == NULL) { + // No exception edges to simply kill off those paths + C->gvn_replace_by(callprojs.catchall_catchproj, C->top()); + C->gvn_replace_by(callprojs.catchall_memproj, C->top()); + C->gvn_replace_by(callprojs.catchall_ioproj, C->top()); + } else { + GraphKit ekit(ejvms); + + // Load my combined exception state into the kit, with all phis transformed: + SafePointNode* ex_map = ekit.combine_and_pop_all_exception_states(); + + Node* ex_oop = ekit.use_exception_state(ex_map); + + C->gvn_replace_by(callprojs.catchall_catchproj, ekit.control()); + C->gvn_replace_by(callprojs.catchall_memproj, ekit.reset_memory()); + C->gvn_replace_by(callprojs.catchall_ioproj, ekit.i_o()); + + // Replace the old exception object with the newly created one + if (callprojs.exobj != NULL) { + C->gvn_replace_by(callprojs.exobj, ex_oop); + } + } + + // Disconnect the call from the graph + call->disconnect_inputs(NULL); + C->gvn_replace_by(call, C->top()); +} + + //------------------------------increment_counter------------------------------ // for statistics: increment a VM counter by 1 @@ -3459,4 +3519,3 @@ void GraphKit::g1_write_barrier_post(Node* oop_store, sync_kit(ideal); } #undef __ - |