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hotspot/src/share/vm/c1/c1_Compilation.cpp

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+/*
+ * Copyright 1999-2007 Sun Microsystems, Inc.  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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
+ * CA 95054 USA or visit www.sun.com if you need additional information or
+ * have any questions.
+ *
+ */
+
+#include "incls/_precompiled.incl"
+#include "incls/_c1_Compilation.cpp.incl"
+
+
+typedef enum {
+  _t_compile,
+  _t_setup,
+  _t_optimizeIR,
+  _t_buildIR,
+  _t_emit_lir,
+  _t_linearScan,
+  _t_lirGeneration,
+  _t_lir_schedule,
+  _t_codeemit,
+  _t_codeinstall,
+  max_phase_timers
+} TimerName;
+
+static const char * timer_name[] = {
+  "compile",
+  "setup",
+  "optimizeIR",
+  "buildIR",
+  "emit_lir",
+  "linearScan",
+  "lirGeneration",
+  "lir_schedule",
+  "codeemit",
+  "codeinstall"
+};
+
+static elapsedTimer timers[max_phase_timers];
+static int totalInstructionNodes = 0;
+
+class PhaseTraceTime: public TraceTime {
+ private:
+  JavaThread* _thread;
+
+ public:
+  PhaseTraceTime(TimerName timer):
+    TraceTime("", &timers[timer], CITime || CITimeEach, Verbose) {
+  }
+};
+
+Arena* Compilation::_arena = NULL;
+Compilation* Compilation::_compilation = NULL;
+
+// Implementation of Compilation
+
+
+#ifndef PRODUCT
+
+void Compilation::maybe_print_current_instruction() {
+  if (_current_instruction != NULL && _last_instruction_printed != _current_instruction) {
+    _last_instruction_printed = _current_instruction;
+    _current_instruction->print_line();
+  }
+}
+#endif // PRODUCT
+
+
+DebugInformationRecorder* Compilation::debug_info_recorder() const {
+  return _env->debug_info();
+}
+
+
+Dependencies* Compilation::dependency_recorder() const {
+  return _env->dependencies();
+}
+
+
+void Compilation::initialize() {
+  // Use an oop recorder bound to the CI environment.
+  // (The default oop recorder is ignorant of the CI.)
+  OopRecorder* ooprec = new OopRecorder(_env->arena());
+  _env->set_oop_recorder(ooprec);
+  _env->set_debug_info(new DebugInformationRecorder(ooprec));
+  debug_info_recorder()->set_oopmaps(new OopMapSet());
+  _env->set_dependencies(new Dependencies(_env));
+}
+
+
+void Compilation::build_hir() {
+  CHECK_BAILOUT();
+
+  // setup ir
+  _hir = new IR(this, method(), osr_bci());
+  if (!_hir->is_valid()) {
+    bailout("invalid parsing");
+    return;
+  }
+
+#ifndef PRODUCT
+  if (PrintCFGToFile) {
+    CFGPrinter::print_cfg(_hir, "After Generation of HIR", true, false);
+  }
+#endif
+
+#ifndef PRODUCT
+  if (PrintCFG || PrintCFG0) { tty->print_cr("CFG after parsing"); _hir->print(true); }
+  if (PrintIR  || PrintIR0 ) { tty->print_cr("IR after parsing"); _hir->print(false); }
+#endif
+
+  _hir->verify();
+
+  if (UseC1Optimizations) {
+    NEEDS_CLEANUP
+    // optimization
+    PhaseTraceTime timeit(_t_optimizeIR);
+
+    _hir->optimize();
+  }
+
+  _hir->verify();
+
+  _hir->split_critical_edges();
+
+#ifndef PRODUCT
+  if (PrintCFG || PrintCFG1) { tty->print_cr("CFG after optimizations"); _hir->print(true); }
+  if (PrintIR  || PrintIR1 ) { tty->print_cr("IR after optimizations"); _hir->print(false); }
+#endif
+
+  _hir->verify();
+
+  // compute block ordering for code generation
+  // the control flow must not be changed from here on
+  _hir->compute_code();
+
+  if (UseGlobalValueNumbering) {
+    ResourceMark rm;
+    int instructions = Instruction::number_of_instructions();
+    GlobalValueNumbering gvn(_hir);
+    assert(instructions == Instruction::number_of_instructions(),
+           "shouldn't have created an instructions");
+  }
+
+  // compute use counts after global value numbering
+  _hir->compute_use_counts();
+
+#ifndef PRODUCT
+  if (PrintCFG || PrintCFG2) { tty->print_cr("CFG before code generation"); _hir->code()->print(true); }
+  if (PrintIR  || PrintIR2 ) { tty->print_cr("IR before code generation"); _hir->code()->print(false, true); }
+#endif
+
+  _hir->verify();
+}
+
+
+void Compilation::emit_lir() {
+  CHECK_BAILOUT();
+
+  LIRGenerator gen(this, method());
+  {
+    PhaseTraceTime timeit(_t_lirGeneration);
+    hir()->iterate_linear_scan_order(&gen);
+  }
+
+  CHECK_BAILOUT();
+
+  {
+    PhaseTraceTime timeit(_t_linearScan);
+
+    LinearScan* allocator = new LinearScan(hir(), &gen, frame_map());
+    set_allocator(allocator);
+    // Assign physical registers to LIR operands using a linear scan algorithm.
+    allocator->do_linear_scan();
+    CHECK_BAILOUT();
+
+    _max_spills = allocator->max_spills();
+  }
+
+  if (BailoutAfterLIR) {
+    if (PrintLIR && !bailed_out()) {
+      print_LIR(hir()->code());
+    }
+    bailout("Bailing out because of -XX:+BailoutAfterLIR");
+  }
+}
+
+
+void Compilation::emit_code_epilog(LIR_Assembler* assembler) {
+  CHECK_BAILOUT();
+
+  // generate code or slow cases
+  assembler->emit_slow_case_stubs();
+  CHECK_BAILOUT();
+
+  // generate exception adapters
+  assembler->emit_exception_entries(exception_info_list());
+  CHECK_BAILOUT();
+
+  // generate code for exception handler
+  assembler->emit_exception_handler();
+  CHECK_BAILOUT();
+  assembler->emit_deopt_handler();
+  CHECK_BAILOUT();
+
+  // done
+  masm()->flush();
+}
+
+
+int Compilation::emit_code_body() {
+  // emit code
+  Runtime1::setup_code_buffer(code(), allocator()->num_calls());
+  code()->initialize_oop_recorder(env()->oop_recorder());
+
+  _masm = new C1_MacroAssembler(code());
+  _masm->set_oop_recorder(env()->oop_recorder());
+
+  LIR_Assembler lir_asm(this);
+
+  lir_asm.emit_code(hir()->code());
+  CHECK_BAILOUT_(0);
+
+  emit_code_epilog(&lir_asm);
+  CHECK_BAILOUT_(0);
+
+  generate_exception_handler_table();
+
+#ifndef PRODUCT
+  if (PrintExceptionHandlers && Verbose) {
+    exception_handler_table()->print();
+  }
+#endif /* PRODUCT */
+
+  return frame_map()->framesize();
+}
+
+
+int Compilation::compile_java_method() {
+  assert(!method()->is_native(), "should not reach here");
+
+  if (BailoutOnExceptionHandlers) {
+    if (method()->has_exception_handlers()) {
+      bailout("linear scan can't handle exception handlers");
+    }
+  }
+
+  CHECK_BAILOUT_(no_frame_size);
+
+  {
+    PhaseTraceTime timeit(_t_buildIR);
+  build_hir();
+  }
+  if (BailoutAfterHIR) {
+    BAILOUT_("Bailing out because of -XX:+BailoutAfterHIR", no_frame_size);
+  }
+
+
+  {
+    PhaseTraceTime timeit(_t_emit_lir);
+
+    _frame_map = new FrameMap(method(), hir()->number_of_locks(), MAX2(4, hir()->max_stack()));
+    emit_lir();
+  }
+  CHECK_BAILOUT_(no_frame_size);
+
+  {
+    PhaseTraceTime timeit(_t_codeemit);
+    return emit_code_body();
+  }
+}
+
+void Compilation::install_code(int frame_size) {
+  // frame_size is in 32-bit words so adjust it intptr_t words
+  assert(frame_size == frame_map()->framesize(), "must match");
+  assert(in_bytes(frame_map()->framesize_in_bytes()) % sizeof(intptr_t) == 0, "must be at least pointer aligned");
+  _env->register_method(
+    method(),
+    osr_bci(),
+    &_offsets,
+    in_bytes(_frame_map->sp_offset_for_orig_pc()),
+    code(),
+    in_bytes(frame_map()->framesize_in_bytes()) / sizeof(intptr_t),
+    debug_info_recorder()->_oopmaps,
+    exception_handler_table(),
+    implicit_exception_table(),
+    compiler(),
+    _env->comp_level(),
+    needs_debug_information(),
+    has_unsafe_access()
+  );
+}
+
+
+void Compilation::compile_method() {
+  // setup compilation
+  initialize();
+
+  if (!method()->can_be_compiled()) {
+    // Prevent race condition 6328518.
+    // This can happen if the method is obsolete or breakpointed.
+    bailout("Bailing out because method is not compilable");
+    return;
+  }
+
+  if (JvmtiExport::can_hotswap_or_post_breakpoint()) {
+    // We can assert evol_method because method->can_be_compiled is true.
+    dependency_recorder()->assert_evol_method(method());
+  }
+
+  if (method()->break_at_execute()) {
+    BREAKPOINT;
+  }
+
+#ifndef PRODUCT
+  if (PrintCFGToFile) {
+    CFGPrinter::print_compilation(this);
+  }
+#endif
+
+  // compile method
+  int frame_size = compile_java_method();
+
+  // bailout if method couldn't be compiled
+  // Note: make sure we mark the method as not compilable!
+  CHECK_BAILOUT();
+
+  if (InstallMethods) {
+    // install code
+    PhaseTraceTime timeit(_t_codeinstall);
+    install_code(frame_size);
+  }
+  totalInstructionNodes += Instruction::number_of_instructions();
+}
+
+
+void Compilation::generate_exception_handler_table() {
+  // Generate an ExceptionHandlerTable from the exception handler
+  // information accumulated during the compilation.
+  ExceptionInfoList* info_list = exception_info_list();
+
+  if (info_list->length() == 0) {
+    return;
+  }
+
+  // allocate some arrays for use by the collection code.
+  const int num_handlers = 5;
+  GrowableArray<intptr_t>* bcis = new GrowableArray<intptr_t>(num_handlers);
+  GrowableArray<intptr_t>* scope_depths = new GrowableArray<intptr_t>(num_handlers);
+  GrowableArray<intptr_t>* pcos = new GrowableArray<intptr_t>(num_handlers);
+
+  for (int i = 0; i < info_list->length(); i++) {
+    ExceptionInfo* info = info_list->at(i);
+    XHandlers* handlers = info->exception_handlers();
+
+    // empty the arrays
+    bcis->trunc_to(0);
+    scope_depths->trunc_to(0);
+    pcos->trunc_to(0);
+
+    for (int i = 0; i < handlers->length(); i++) {
+      XHandler* handler = handlers->handler_at(i);
+      assert(handler->entry_pco() != -1, "must have been generated");
+
+      int e = bcis->find(handler->handler_bci());
+      if (e >= 0 && scope_depths->at(e) == handler->scope_count()) {
+        // two different handlers are declared to dispatch to the same
+        // catch bci.  During parsing we created edges for each
+        // handler but we really only need one.  The exception handler
+        // table will also get unhappy if we try to declare both since
+        // it's nonsensical.  Just skip this handler.
+        continue;
+      }
+
+      bcis->append(handler->handler_bci());
+      if (handler->handler_bci() == -1) {
+        // insert a wildcard handler at scope depth 0 so that the
+        // exception lookup logic with find it.
+        scope_depths->append(0);
+      } else {
+        scope_depths->append(handler->scope_count());
+    }
+      pcos->append(handler->entry_pco());
+
+      // stop processing once we hit a catch any
+      if (handler->is_catch_all()) {
+        assert(i == handlers->length() - 1, "catch all must be last handler");
+  }
+    }
+    exception_handler_table()->add_subtable(info->pco(), bcis, scope_depths, pcos);
+  }
+}
+
+
+Compilation::Compilation(AbstractCompiler* compiler, ciEnv* env, ciMethod* method, int osr_bci)
+: _compiler(compiler)
+, _env(env)
+, _method(method)
+, _osr_bci(osr_bci)
+, _hir(NULL)
+, _max_spills(-1)
+, _frame_map(NULL)
+, _masm(NULL)
+, _has_exception_handlers(false)
+, _has_fpu_code(true)   // pessimistic assumption
+, _has_unsafe_access(false)
+, _bailout_msg(NULL)
+, _exception_info_list(NULL)
+, _allocator(NULL)
+, _code(Runtime1::get_buffer_blob()->instructions_begin(),
+        Runtime1::get_buffer_blob()->instructions_size())
+, _current_instruction(NULL)
+#ifndef PRODUCT
+, _last_instruction_printed(NULL)
+#endif // PRODUCT
+{
+  PhaseTraceTime timeit(_t_compile);
+
+  assert(_arena == NULL, "shouldn't only one instance of Compilation in existence at a time");
+  _arena = Thread::current()->resource_area();
+  _compilation = this;
+  _needs_debug_information = JvmtiExport::can_examine_or_deopt_anywhere() ||
+                               JavaMonitorsInStackTrace || AlwaysEmitDebugInfo || DeoptimizeALot;
+  _exception_info_list = new ExceptionInfoList();
+  _implicit_exception_table.set_size(0);
+  compile_method();
+}
+
+Compilation::~Compilation() {
+  _arena = NULL;
+  _compilation = NULL;
+}
+
+
+void Compilation::add_exception_handlers_for_pco(int pco, XHandlers* exception_handlers) {
+#ifndef PRODUCT
+  if (PrintExceptionHandlers && Verbose) {
+    tty->print_cr("  added exception scope for pco %d", pco);
+  }
+#endif
+  // Note: we do not have program counters for these exception handlers yet
+  exception_info_list()->push(new ExceptionInfo(pco, exception_handlers));
+}
+
+
+void Compilation::notice_inlined_method(ciMethod* method) {
+  _env->notice_inlined_method(method);
+}
+
+
+void Compilation::bailout(const char* msg) {
+  assert(msg != NULL, "bailout message must exist");
+  if (!bailed_out()) {
+    // keep first bailout message
+    if (PrintBailouts) tty->print_cr("compilation bailout: %s", msg);
+    _bailout_msg = msg;
+  }
+}
+
+
+void Compilation::print_timers() {
+  // tty->print_cr("    Native methods         : %6.3f s, Average : %2.3f", CompileBroker::_t_native_compilation.seconds(), CompileBroker::_t_native_compilation.seconds() / CompileBroker::_total_native_compile_count);
+  float total = timers[_t_setup].seconds() + timers[_t_buildIR].seconds() + timers[_t_emit_lir].seconds() + timers[_t_lir_schedule].seconds() + timers[_t_codeemit].seconds() + timers[_t_codeinstall].seconds();
+
+
+  tty->print_cr("    Detailed C1 Timings");
+  tty->print_cr("       Setup time:        %6.3f s (%4.1f%%)",    timers[_t_setup].seconds(),           (timers[_t_setup].seconds() / total) * 100.0);
+  tty->print_cr("       Build IR:          %6.3f s (%4.1f%%)",    timers[_t_buildIR].seconds(),         (timers[_t_buildIR].seconds() / total) * 100.0);
+  tty->print_cr("         Optimize:           %6.3f s (%4.1f%%)", timers[_t_optimizeIR].seconds(),      (timers[_t_optimizeIR].seconds() / total) * 100.0);
+  tty->print_cr("       Emit LIR:          %6.3f s (%4.1f%%)",    timers[_t_emit_lir].seconds(),        (timers[_t_emit_lir].seconds() / total) * 100.0);
+  tty->print_cr("         LIR Gen:          %6.3f s (%4.1f%%)",   timers[_t_lirGeneration].seconds(), (timers[_t_lirGeneration].seconds() / total) * 100.0);
+  tty->print_cr("         Linear Scan:      %6.3f s (%4.1f%%)",   timers[_t_linearScan].seconds(),    (timers[_t_linearScan].seconds() / total) * 100.0);
+  NOT_PRODUCT(LinearScan::print_timers(timers[_t_linearScan].seconds()));
+  tty->print_cr("       LIR Schedule:      %6.3f s (%4.1f%%)",    timers[_t_lir_schedule].seconds(),  (timers[_t_lir_schedule].seconds() / total) * 100.0);
+  tty->print_cr("       Code Emission:     %6.3f s (%4.1f%%)",    timers[_t_codeemit].seconds(),        (timers[_t_codeemit].seconds() / total) * 100.0);
+  tty->print_cr("       Code Installation: %6.3f s (%4.1f%%)",    timers[_t_codeinstall].seconds(),     (timers[_t_codeinstall].seconds() / total) * 100.0);
+  tty->print_cr("       Instruction Nodes: %6d nodes",    totalInstructionNodes);
+
+  NOT_PRODUCT(LinearScan::print_statistics());
+}
+
+
+#ifndef PRODUCT
+void Compilation::compile_only_this_method() {
+  ResourceMark rm;
+  fileStream stream(fopen("c1_compile_only", "wt"));
+  stream.print_cr("# c1 compile only directives");
+  compile_only_this_scope(&stream, hir()->top_scope());
+}
+
+
+void Compilation::compile_only_this_scope(outputStream* st, IRScope* scope) {
+  st->print("CompileOnly=");
+  scope->method()->holder()->name()->print_symbol_on(st);
+  st->print(".");
+  scope->method()->name()->print_symbol_on(st);
+  st->cr();
+}
+
+
+void Compilation::exclude_this_method() {
+  fileStream stream(fopen(".hotspot_compiler", "at"));
+  stream.print("exclude ");
+  method()->holder()->name()->print_symbol_on(&stream);
+  stream.print(" ");
+  method()->name()->print_symbol_on(&stream);
+  stream.cr();
+  stream.cr();
+}
+#endif