/* * Copyright (c) 1999, 2011, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation. * * This code is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. * */ #include "precompiled.hpp" #include "opto/c2compiler.hpp" #include "opto/runtime.hpp" #ifdef TARGET_ARCH_MODEL_x86_32 # include "adfiles/ad_x86_32.hpp" #endif #ifdef TARGET_ARCH_MODEL_x86_64 # include "adfiles/ad_x86_64.hpp" #endif #ifdef TARGET_ARCH_MODEL_sparc # include "adfiles/ad_sparc.hpp" #endif #ifdef TARGET_ARCH_MODEL_zero # include "adfiles/ad_zero.hpp" #endif #ifdef TARGET_ARCH_MODEL_arm # include "adfiles/ad_arm.hpp" #endif #ifdef TARGET_ARCH_MODEL_ppc # include "adfiles/ad_ppc.hpp" #endif volatile int C2Compiler::_runtimes = uninitialized; // register information defined by ADLC extern const char register_save_policy[]; extern const int register_save_type[]; const char* C2Compiler::retry_no_subsuming_loads() { return "retry without subsuming loads"; } const char* C2Compiler::retry_no_escape_analysis() { return "retry without escape analysis"; } void C2Compiler::initialize_runtime() { // Check assumptions used while running ADLC Compile::adlc_verification(); assert(REG_COUNT <= ConcreteRegisterImpl::number_of_registers, "incompatible register counts"); for (int i = 0; i < ConcreteRegisterImpl::number_of_registers ; i++ ) { OptoReg::vm2opto[i] = OptoReg::Bad; } for( OptoReg::Name i=OptoReg::Name(0); iis_valid()) { OptoReg::vm2opto[r->value()] = i; } } // Check that runtime and architecture description agree on callee-saved-floats bool callee_saved_floats = false; for( OptoReg::Name i=OptoReg::Name(0); ienv()); } void C2Compiler::initialize() { // This method can only be called once per C2Compiler object // The first compiler thread that gets here will initialize the // small amount of global state (and runtime stubs) that c2 needs. // There is a race possible once at startup and then we're fine // Note that this is being called from a compiler thread not the // main startup thread. if (_runtimes != initialized) { initialize_runtimes( initialize_runtime, &_runtimes); } // Mark this compiler object as ready to roll mark_initialized(); } void C2Compiler::compile_method(ciEnv* env, ciMethod* target, int entry_bci) { if (!is_initialized()) { initialize(); } bool subsume_loads = SubsumeLoads; bool do_escape_analysis = DoEscapeAnalysis && !env->jvmti_can_access_local_variables(); bool eliminate_boxing = EliminateAutoBox; while (!env->failing()) { // Attempt to compile while subsuming loads into machine instructions. Compile C(env, this, target, entry_bci, subsume_loads, do_escape_analysis, eliminate_boxing); // Check result and retry if appropriate. if (C.failure_reason() != NULL) { if (C.failure_reason_is(retry_no_subsuming_loads())) { assert(subsume_loads, "must make progress"); subsume_loads = false; continue; // retry } if (C.failure_reason_is(retry_no_escape_analysis())) { assert(do_escape_analysis, "must make progress"); do_escape_analysis = false; continue; // retry } if (C.has_boxed_value()) { // Recompile without boxing elimination regardless failure reason. assert(eliminate_boxing, "must make progress"); eliminate_boxing = false; continue; // retry } // Pass any other failure reason up to the ciEnv. // Note that serious, irreversible failures are already logged // on the ciEnv via env->record_method_not_compilable(). env->record_failure(C.failure_reason()); } if (StressRecompilation) { if (subsume_loads) { subsume_loads = false; continue; // retry } if (do_escape_analysis) { do_escape_analysis = false; continue; // retry } } // No retry; just break the loop. break; } } void C2Compiler::print_timers() { // do nothing }