hotspot/src/share/vm/opto/doCall.cpp
author kvn
Wed, 08 May 2013 15:08:01 -0700
changeset 17383 3665c0901a0d
parent 15210 eb42543a7050
child 20073 bfc95277d42b
permissions -rw-r--r--
6934604: enable parts of EliminateAutoBox by default Summary: Resurrected autobox elimination code and enabled part of it by default. Reviewed-by: roland, twisti
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/*
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 * Copyright (c) 1998, 2012, Oracle and/or its affiliates. All rights reserved.
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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 *
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 * This code is free software; you can redistribute it and/or modify it
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 * under the terms of the GNU General Public License version 2 only, as
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 * published by the Free Software Foundation.
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 *
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 * This code is distributed in the hope that it will be useful, but WITHOUT
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 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
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 * version 2 for more details (a copy is included in the LICENSE file that
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 * accompanied this code).
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 *
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 * You should have received a copy of the GNU General Public License version
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 * 2 along with this work; if not, write to the Free Software Foundation,
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 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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 *
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 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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 * or visit www.oracle.com if you need additional information or have any
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 * questions.
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 *
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 */
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#include "precompiled.hpp"
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#include "ci/ciCallSite.hpp"
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#include "ci/ciMethodHandle.hpp"
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#include "classfile/vmSymbols.hpp"
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#include "compiler/compileBroker.hpp"
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#include "compiler/compileLog.hpp"
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#include "interpreter/linkResolver.hpp"
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#include "opto/addnode.hpp"
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#include "opto/callGenerator.hpp"
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#include "opto/cfgnode.hpp"
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#include "opto/mulnode.hpp"
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#include "opto/parse.hpp"
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#include "opto/rootnode.hpp"
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#include "opto/runtime.hpp"
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#include "opto/subnode.hpp"
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#include "prims/nativeLookup.hpp"
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#include "runtime/sharedRuntime.hpp"
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void trace_type_profile(Compile* C, ciMethod *method, int depth, int bci, ciMethod *prof_method, ciKlass *prof_klass, int site_count, int receiver_count) {
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  if (TraceTypeProfile || PrintInlining NOT_PRODUCT(|| PrintOptoInlining)) {
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    outputStream* out = tty;
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    if (!PrintInlining) {
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      if (NOT_PRODUCT(!PrintOpto &&) !PrintCompilation) {
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        method->print_short_name();
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        tty->cr();
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      }
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      CompileTask::print_inlining(prof_method, depth, bci);
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    } else {
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      out = C->print_inlining_stream();
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    }
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    CompileTask::print_inline_indent(depth, out);
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    out->print(" \\-> TypeProfile (%d/%d counts) = ", receiver_count, site_count);
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    stringStream ss;
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    prof_klass->name()->print_symbol_on(&ss);
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    out->print(ss.as_string());
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    out->cr();
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  }
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}
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CallGenerator* Compile::call_generator(ciMethod* callee, int vtable_index, bool call_does_dispatch,
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                                       JVMState* jvms, bool allow_inline,
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                                       float prof_factor, bool allow_intrinsics, bool delayed_forbidden) {
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  ciMethod*       caller   = jvms->method();
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  int             bci      = jvms->bci();
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  Bytecodes::Code bytecode = caller->java_code_at_bci(bci);
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  guarantee(callee != NULL, "failed method resolution");
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  // Dtrace currently doesn't work unless all calls are vanilla
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  if (env()->dtrace_method_probes()) {
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    allow_inline = false;
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  }
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  // Note: When we get profiling during stage-1 compiles, we want to pull
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  // from more specific profile data which pertains to this inlining.
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  // Right now, ignore the information in jvms->caller(), and do method[bci].
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  ciCallProfile profile = caller->call_profile_at_bci(bci);
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  // See how many times this site has been invoked.
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  int site_count = profile.count();
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  int receiver_count = -1;
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  if (call_does_dispatch && UseTypeProfile && profile.has_receiver(0)) {
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    // Receivers in the profile structure are ordered by call counts
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    // so that the most called (major) receiver is profile.receiver(0).
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    receiver_count = profile.receiver_count(0);
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  }
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  CompileLog* log = this->log();
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  if (log != NULL) {
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    int rid = (receiver_count >= 0)? log->identify(profile.receiver(0)): -1;
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    int r2id = (rid != -1 && profile.has_receiver(1))? log->identify(profile.receiver(1)):-1;
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    log->begin_elem("call method='%d' count='%d' prof_factor='%g'",
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                    log->identify(callee), site_count, prof_factor);
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    if (call_does_dispatch)  log->print(" virtual='1'");
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    if (allow_inline)     log->print(" inline='1'");
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    if (receiver_count >= 0) {
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      log->print(" receiver='%d' receiver_count='%d'", rid, receiver_count);
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      if (profile.has_receiver(1)) {
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        log->print(" receiver2='%d' receiver2_count='%d'", r2id, profile.receiver_count(1));
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      }
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    }
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    log->end_elem();
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  }
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  // Special case the handling of certain common, profitable library
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  // methods.  If these methods are replaced with specialized code,
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  // then we return it as the inlined version of the call.
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  // We do this before the strict f.p. check below because the
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  // intrinsics handle strict f.p. correctly.
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  if (allow_inline && allow_intrinsics) {
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    CallGenerator* cg = find_intrinsic(callee, call_does_dispatch);
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    if (cg != NULL) {
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      if (cg->is_predicted()) {
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        // Code without intrinsic but, hopefully, inlined.
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        CallGenerator* inline_cg = this->call_generator(callee,
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              vtable_index, call_does_dispatch, jvms, allow_inline, prof_factor, false);
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        if (inline_cg != NULL) {
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          cg = CallGenerator::for_predicted_intrinsic(cg, inline_cg);
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        }
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      }
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      return cg;
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    }
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  }
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  // Do method handle calls.
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  // NOTE: This must happen before normal inlining logic below since
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  // MethodHandle.invoke* are native methods which obviously don't
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  // have bytecodes and so normal inlining fails.
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  if (callee->is_method_handle_intrinsic()) {
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    CallGenerator* cg = CallGenerator::for_method_handle_call(jvms, caller, callee, delayed_forbidden);
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    assert(cg == NULL || !delayed_forbidden || !cg->is_late_inline() || cg->is_mh_late_inline(), "unexpected CallGenerator");
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    return cg;
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  }
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  // Do not inline strict fp into non-strict code, or the reverse
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  if (caller->is_strict() ^ callee->is_strict()) {
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    allow_inline = false;
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  }
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  // Attempt to inline...
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  if (allow_inline) {
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    // The profile data is only partly attributable to this caller,
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    // scale back the call site information.
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    float past_uses = jvms->method()->scale_count(site_count, prof_factor);
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    // This is the number of times we expect the call code to be used.
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    float expected_uses = past_uses;
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    // Try inlining a bytecoded method:
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    if (!call_does_dispatch) {
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      InlineTree* ilt;
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      if (UseOldInlining) {
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        ilt = InlineTree::find_subtree_from_root(this->ilt(), jvms->caller(), jvms->method());
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      } else {
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        // Make a disembodied, stateless ILT.
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        // TO DO:  When UseOldInlining is removed, copy the ILT code elsewhere.
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        float site_invoke_ratio = prof_factor;
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        // Note:  ilt is for the root of this parse, not the present call site.
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        ilt = new InlineTree(this, jvms->method(), jvms->caller(), site_invoke_ratio, MaxInlineLevel);
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      }
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      WarmCallInfo scratch_ci;
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      if (!UseOldInlining)
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        scratch_ci.init(jvms, callee, profile, prof_factor);
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      bool should_delay = false;
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      WarmCallInfo* ci = ilt->ok_to_inline(callee, jvms, profile, &scratch_ci, should_delay);
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      assert(ci != &scratch_ci, "do not let this pointer escape");
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      bool allow_inline   = (ci != NULL && !ci->is_cold());
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      bool require_inline = (allow_inline && ci->is_hot());
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      if (allow_inline) {
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        CallGenerator* cg = CallGenerator::for_inline(callee, expected_uses);
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        if (require_inline && cg != NULL) {
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          // Delay the inlining of this method to give us the
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          // opportunity to perform some high level optimizations
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          // first.
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          if (should_delay_string_inlining(callee, jvms)) {
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            assert(!delayed_forbidden, "strange");
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            return CallGenerator::for_string_late_inline(callee, cg);
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          } else if (should_delay_boxing_inlining(callee, jvms)) {
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            assert(!delayed_forbidden, "strange");
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            return CallGenerator::for_boxing_late_inline(callee, cg);
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          } else if ((should_delay || AlwaysIncrementalInline) && !delayed_forbidden) {
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            return CallGenerator::for_late_inline(callee, cg);
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          }
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        }
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        if (cg == NULL || should_delay) {
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          // Fall through.
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        } else if (require_inline || !InlineWarmCalls) {
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          return cg;
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        } else {
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          CallGenerator* cold_cg = call_generator(callee, vtable_index, call_does_dispatch, jvms, false, prof_factor);
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          return CallGenerator::for_warm_call(ci, cold_cg, cg);
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        }
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      }
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    }
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    // Try using the type profile.
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    if (call_does_dispatch && site_count > 0 && receiver_count > 0) {
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      // The major receiver's count >= TypeProfileMajorReceiverPercent of site_count.
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      bool have_major_receiver = (100.*profile.receiver_prob(0) >= (float)TypeProfileMajorReceiverPercent);
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      ciMethod* receiver_method = NULL;
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      if (have_major_receiver || profile.morphism() == 1 ||
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          (profile.morphism() == 2 && UseBimorphicInlining)) {
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        // receiver_method = profile.method();
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        // Profiles do not suggest methods now.  Look it up in the major receiver.
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        receiver_method = callee->resolve_invoke(jvms->method()->holder(),
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                                                      profile.receiver(0));
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      }
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      if (receiver_method != NULL) {
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        // The single majority receiver sufficiently outweighs the minority.
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        CallGenerator* hit_cg = this->call_generator(receiver_method,
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              vtable_index, !call_does_dispatch, jvms, allow_inline, prof_factor);
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        if (hit_cg != NULL) {
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          // Look up second receiver.
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          CallGenerator* next_hit_cg = NULL;
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          ciMethod* next_receiver_method = NULL;
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          if (profile.morphism() == 2 && UseBimorphicInlining) {
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            next_receiver_method = callee->resolve_invoke(jvms->method()->holder(),
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                                                               profile.receiver(1));
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            if (next_receiver_method != NULL) {
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              next_hit_cg = this->call_generator(next_receiver_method,
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                                  vtable_index, !call_does_dispatch, jvms,
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                                  allow_inline, prof_factor);
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              if (next_hit_cg != NULL && !next_hit_cg->is_inline() &&
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                  have_major_receiver && UseOnlyInlinedBimorphic) {
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                  // Skip if we can't inline second receiver's method
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                  next_hit_cg = NULL;
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              }
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            }
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          }
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          CallGenerator* miss_cg;
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          Deoptimization::DeoptReason reason = (profile.morphism() == 2) ?
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                                    Deoptimization::Reason_bimorphic :
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                                    Deoptimization::Reason_class_check;
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          if (( profile.morphism() == 1 ||
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               (profile.morphism() == 2 && next_hit_cg != NULL) ) &&
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              !too_many_traps(jvms->method(), jvms->bci(), reason)
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             ) {
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            // Generate uncommon trap for class check failure path
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            // in case of monomorphic or bimorphic virtual call site.
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            miss_cg = CallGenerator::for_uncommon_trap(callee, reason,
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                        Deoptimization::Action_maybe_recompile);
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          } else {
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            // Generate virtual call for class check failure path
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            // in case of polymorphic virtual call site.
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            miss_cg = CallGenerator::for_virtual_call(callee, vtable_index);
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          }
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          if (miss_cg != NULL) {
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            if (next_hit_cg != NULL) {
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              trace_type_profile(C, jvms->method(), jvms->depth() - 1, jvms->bci(), next_receiver_method, profile.receiver(1), site_count, profile.receiver_count(1));
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              // We don't need to record dependency on a receiver here and below.
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              // Whenever we inline, the dependency is added by Parse::Parse().
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              miss_cg = CallGenerator::for_predicted_call(profile.receiver(1), miss_cg, next_hit_cg, PROB_MAX);
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            }
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            if (miss_cg != NULL) {
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              trace_type_profile(C, jvms->method(), jvms->depth() - 1, jvms->bci(), receiver_method, profile.receiver(0), site_count, receiver_count);
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              CallGenerator* cg = CallGenerator::for_predicted_call(profile.receiver(0), miss_cg, hit_cg, profile.receiver_prob(0));
1
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              if (cg != NULL)  return cg;
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            }
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          }
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        }
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      }
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    }
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  }
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   268
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  // There was no special inlining tactic, or it bailed out.
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  // Use a more generic tactic, like a simple call.
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  if (call_does_dispatch) {
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    return CallGenerator::for_virtual_call(callee, vtable_index);
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  } else {
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    // Class Hierarchy Analysis or Type Profile reveals a unique target,
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    // or it is a static or special call.
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    return CallGenerator::for_direct_call(callee, should_delay_inlining(callee, jvms));
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  }
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}
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// Return true for methods that shouldn't be inlined early so that
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// they are easier to analyze and optimize as intrinsics.
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bool Compile::should_delay_string_inlining(ciMethod* call_method, JVMState* jvms) {
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  if (has_stringbuilder()) {
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    if ((call_method->holder() == C->env()->StringBuilder_klass() ||
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         call_method->holder() == C->env()->StringBuffer_klass()) &&
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        (jvms->method()->holder() == C->env()->StringBuilder_klass() ||
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         jvms->method()->holder() == C->env()->StringBuffer_klass())) {
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      // Delay SB calls only when called from non-SB code
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      return false;
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   291
    }
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    switch (call_method->intrinsic_id()) {
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      case vmIntrinsics::_StringBuilder_void:
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      case vmIntrinsics::_StringBuilder_int:
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      case vmIntrinsics::_StringBuilder_String:
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      case vmIntrinsics::_StringBuilder_append_char:
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      case vmIntrinsics::_StringBuilder_append_int:
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      case vmIntrinsics::_StringBuilder_append_String:
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      case vmIntrinsics::_StringBuilder_toString:
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      case vmIntrinsics::_StringBuffer_void:
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      case vmIntrinsics::_StringBuffer_int:
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      case vmIntrinsics::_StringBuffer_String:
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      case vmIntrinsics::_StringBuffer_append_char:
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      case vmIntrinsics::_StringBuffer_append_int:
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      case vmIntrinsics::_StringBuffer_append_String:
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      case vmIntrinsics::_StringBuffer_toString:
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   308
      case vmIntrinsics::_Integer_toString:
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   309
        return true;
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      case vmIntrinsics::_String_String:
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        {
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          Node* receiver = jvms->map()->in(jvms->argoff() + 1);
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          if (receiver->is_Proj() && receiver->in(0)->is_CallStaticJava()) {
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   315
            CallStaticJavaNode* csj = receiver->in(0)->as_CallStaticJava();
6d700b859b3e 6892658: C2 should optimize some stringbuilder patterns
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parents: 3261
diff changeset
   316
            ciMethod* m = csj->method();
6d700b859b3e 6892658: C2 should optimize some stringbuilder patterns
never
parents: 3261
diff changeset
   317
            if (m != NULL &&
6d700b859b3e 6892658: C2 should optimize some stringbuilder patterns
never
parents: 3261
diff changeset
   318
                (m->intrinsic_id() == vmIntrinsics::_StringBuffer_toString ||
6d700b859b3e 6892658: C2 should optimize some stringbuilder patterns
never
parents: 3261
diff changeset
   319
                 m->intrinsic_id() == vmIntrinsics::_StringBuilder_toString))
6d700b859b3e 6892658: C2 should optimize some stringbuilder patterns
never
parents: 3261
diff changeset
   320
              // Delay String.<init>(new SB())
6d700b859b3e 6892658: C2 should optimize some stringbuilder patterns
never
parents: 3261
diff changeset
   321
              return true;
6d700b859b3e 6892658: C2 should optimize some stringbuilder patterns
never
parents: 3261
diff changeset
   322
          }
6d700b859b3e 6892658: C2 should optimize some stringbuilder patterns
never
parents: 3261
diff changeset
   323
          return false;
6d700b859b3e 6892658: C2 should optimize some stringbuilder patterns
never
parents: 3261
diff changeset
   324
        }
6d700b859b3e 6892658: C2 should optimize some stringbuilder patterns
never
parents: 3261
diff changeset
   325
6d700b859b3e 6892658: C2 should optimize some stringbuilder patterns
never
parents: 3261
diff changeset
   326
      default:
6d700b859b3e 6892658: C2 should optimize some stringbuilder patterns
never
parents: 3261
diff changeset
   327
        return false;
6d700b859b3e 6892658: C2 should optimize some stringbuilder patterns
never
parents: 3261
diff changeset
   328
    }
6d700b859b3e 6892658: C2 should optimize some stringbuilder patterns
never
parents: 3261
diff changeset
   329
  }
6d700b859b3e 6892658: C2 should optimize some stringbuilder patterns
never
parents: 3261
diff changeset
   330
  return false;
6d700b859b3e 6892658: C2 should optimize some stringbuilder patterns
never
parents: 3261
diff changeset
   331
}
6d700b859b3e 6892658: C2 should optimize some stringbuilder patterns
never
parents: 3261
diff changeset
   332
17383
3665c0901a0d 6934604: enable parts of EliminateAutoBox by default
kvn
parents: 15210
diff changeset
   333
bool Compile::should_delay_boxing_inlining(ciMethod* call_method, JVMState* jvms) {
3665c0901a0d 6934604: enable parts of EliminateAutoBox by default
kvn
parents: 15210
diff changeset
   334
  if (eliminate_boxing() && call_method->is_boxing_method()) {
3665c0901a0d 6934604: enable parts of EliminateAutoBox by default
kvn
parents: 15210
diff changeset
   335
    set_has_boxed_value(true);
3665c0901a0d 6934604: enable parts of EliminateAutoBox by default
kvn
parents: 15210
diff changeset
   336
    return true;
3665c0901a0d 6934604: enable parts of EliminateAutoBox by default
kvn
parents: 15210
diff changeset
   337
  }
3665c0901a0d 6934604: enable parts of EliminateAutoBox by default
kvn
parents: 15210
diff changeset
   338
  return false;
3665c0901a0d 6934604: enable parts of EliminateAutoBox by default
kvn
parents: 15210
diff changeset
   339
}
1
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parents:
diff changeset
   340
489c9b5090e2 Initial load
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parents:
diff changeset
   341
// uncommon-trap call-sites where callee is unloaded, uninitialized or will not link
489c9b5090e2 Initial load
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parents:
diff changeset
   342
bool Parse::can_not_compile_call_site(ciMethod *dest_method, ciInstanceKlass* klass) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   343
  // Additional inputs to consider...
489c9b5090e2 Initial load
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parents:
diff changeset
   344
  // bc      = bc()
489c9b5090e2 Initial load
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parents:
diff changeset
   345
  // caller  = method()
489c9b5090e2 Initial load
duke
parents:
diff changeset
   346
  // iter().get_method_holder_index()
489c9b5090e2 Initial load
duke
parents:
diff changeset
   347
  assert( dest_method->is_loaded(), "ciTypeFlow should not let us get here" );
489c9b5090e2 Initial load
duke
parents:
diff changeset
   348
  // Interface classes can be loaded & linked and never get around to
489c9b5090e2 Initial load
duke
parents:
diff changeset
   349
  // being initialized.  Uncommon-trap for not-initialized static or
489c9b5090e2 Initial load
duke
parents:
diff changeset
   350
  // v-calls.  Let interface calls happen.
4566
b363f6ef4068 6829187: compiler optimizations required for JSR 292
twisti
parents: 4564
diff changeset
   351
  ciInstanceKlass* holder_klass = dest_method->holder();
5925
a30fef61d0b7 6958668: repeated uncommon trapping for new of klass which is being initialized
never
parents: 5547
diff changeset
   352
  if (!holder_klass->is_being_initialized() &&
a30fef61d0b7 6958668: repeated uncommon trapping for new of klass which is being initialized
never
parents: 5547
diff changeset
   353
      !holder_klass->is_initialized() &&
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   354
      !holder_klass->is_interface()) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   355
    uncommon_trap(Deoptimization::Reason_uninitialized,
489c9b5090e2 Initial load
duke
parents:
diff changeset
   356
                  Deoptimization::Action_reinterpret,
489c9b5090e2 Initial load
duke
parents:
diff changeset
   357
                  holder_klass);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   358
    return true;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   359
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   360
14478
1c4a20806af7 8001077: remove ciMethod::will_link
bharadwaj
parents: 14132
diff changeset
   361
  assert(dest_method->is_loaded(), "dest_method: typeflow responsibility");
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   362
  return false;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   363
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   364
489c9b5090e2 Initial load
duke
parents:
diff changeset
   365
489c9b5090e2 Initial load
duke
parents:
diff changeset
   366
//------------------------------do_call----------------------------------------
489c9b5090e2 Initial load
duke
parents:
diff changeset
   367
// Handle your basic call.  Inline if we can & want to, else just setup call.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   368
void Parse::do_call() {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   369
  // It's likely we are going to add debug info soon.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   370
  // Also, if we inline a guy who eventually needs debug info for this JVMS,
489c9b5090e2 Initial load
duke
parents:
diff changeset
   371
  // our contribution to it is cleaned up right here.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   372
  kill_dead_locals();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   373
489c9b5090e2 Initial load
duke
parents:
diff changeset
   374
  // Set frequently used booleans
13522
5ad4627e792a 7192406: JSR 292: C2 needs exact return type information for invokedynamic and invokehandle call sites
twisti
parents: 13395
diff changeset
   375
  const bool is_virtual = bc() == Bytecodes::_invokevirtual;
5ad4627e792a 7192406: JSR 292: C2 needs exact return type information for invokedynamic and invokehandle call sites
twisti
parents: 13395
diff changeset
   376
  const bool is_virtual_or_interface = is_virtual || bc() == Bytecodes::_invokeinterface;
14621
fd9265ab0f67 7172640: C2: instrinsic implementations in LibraryCallKit should use argument() instead of pop()
twisti
parents: 14478
diff changeset
   377
  const bool has_receiver = Bytecodes::has_receiver(bc());
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   378
489c9b5090e2 Initial load
duke
parents:
diff changeset
   379
  // Find target being called
489c9b5090e2 Initial load
duke
parents:
diff changeset
   380
  bool             will_link;
13522
5ad4627e792a 7192406: JSR 292: C2 needs exact return type information for invokedynamic and invokehandle call sites
twisti
parents: 13395
diff changeset
   381
  ciSignature*     declared_signature = NULL;
5ad4627e792a 7192406: JSR 292: C2 needs exact return type information for invokedynamic and invokehandle call sites
twisti
parents: 13395
diff changeset
   382
  ciMethod*        orig_callee  = iter().get_method(will_link, &declared_signature);  // callee in the bytecode
5ad4627e792a 7192406: JSR 292: C2 needs exact return type information for invokedynamic and invokehandle call sites
twisti
parents: 13395
diff changeset
   383
  ciInstanceKlass* holder_klass = orig_callee->holder();
5ad4627e792a 7192406: JSR 292: C2 needs exact return type information for invokedynamic and invokehandle call sites
twisti
parents: 13395
diff changeset
   384
  ciKlass*         holder       = iter().get_declared_method_holder();
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   385
  ciInstanceKlass* klass = ciEnv::get_instance_klass_for_declared_method_holder(holder);
13522
5ad4627e792a 7192406: JSR 292: C2 needs exact return type information for invokedynamic and invokehandle call sites
twisti
parents: 13395
diff changeset
   386
  assert(declared_signature != NULL, "cannot be null");
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   387
489c9b5090e2 Initial load
duke
parents:
diff changeset
   388
  // uncommon-trap when callee is unloaded, uninitialized or will not link
489c9b5090e2 Initial load
duke
parents:
diff changeset
   389
  // bailout when too many arguments for register representation
13522
5ad4627e792a 7192406: JSR 292: C2 needs exact return type information for invokedynamic and invokehandle call sites
twisti
parents: 13395
diff changeset
   390
  if (!will_link || can_not_compile_call_site(orig_callee, klass)) {
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   391
#ifndef PRODUCT
489c9b5090e2 Initial load
duke
parents:
diff changeset
   392
    if (PrintOpto && (Verbose || WizardMode)) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   393
      method()->print_name(); tty->print_cr(" can not compile call at bci %d to:", bci());
13522
5ad4627e792a 7192406: JSR 292: C2 needs exact return type information for invokedynamic and invokehandle call sites
twisti
parents: 13395
diff changeset
   394
      orig_callee->print_name(); tty->cr();
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   395
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   396
#endif
489c9b5090e2 Initial load
duke
parents:
diff changeset
   397
    return;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   398
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   399
  assert(holder_klass->is_loaded(), "");
13391
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 12741
diff changeset
   400
  //assert((bc_callee->is_static() || is_invokedynamic) == !has_receiver , "must match bc");  // XXX invokehandle (cur_bc_raw)
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   401
  // Note: this takes into account invokeinterface of methods declared in java/lang/Object,
489c9b5090e2 Initial load
duke
parents:
diff changeset
   402
  // which should be invokevirtuals but according to the VM spec may be invokeinterfaces
489c9b5090e2 Initial load
duke
parents:
diff changeset
   403
  assert(holder_klass->is_interface() || holder_klass->super() == NULL || (bc() != Bytecodes::_invokeinterface), "must match bc");
489c9b5090e2 Initial load
duke
parents:
diff changeset
   404
  // Note:  In the absence of miranda methods, an abstract class K can perform
489c9b5090e2 Initial load
duke
parents:
diff changeset
   405
  // an invokevirtual directly on an interface method I.m if K implements I.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   406
14621
fd9265ab0f67 7172640: C2: instrinsic implementations in LibraryCallKit should use argument() instead of pop()
twisti
parents: 14478
diff changeset
   407
  // orig_callee is the resolved callee which's signature includes the
fd9265ab0f67 7172640: C2: instrinsic implementations in LibraryCallKit should use argument() instead of pop()
twisti
parents: 14478
diff changeset
   408
  // appendix argument.
13522
5ad4627e792a 7192406: JSR 292: C2 needs exact return type information for invokedynamic and invokehandle call sites
twisti
parents: 13395
diff changeset
   409
  const int nargs = orig_callee->arg_size();
15118
1a1a6d1dfaab 8005418: JSR 292: virtual dispatch bug in 292 impl
twisti
parents: 15113
diff changeset
   410
  const bool is_signature_polymorphic = MethodHandles::is_signature_polymorphic(orig_callee->intrinsic_id());
13391
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 12741
diff changeset
   411
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 12741
diff changeset
   412
  // Push appendix argument (MethodType, CallSite, etc.), if one.
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 12741
diff changeset
   413
  if (iter().has_appendix()) {
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 12741
diff changeset
   414
    ciObject* appendix_arg = iter().get_appendix();
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 12741
diff changeset
   415
    const TypeOopPtr* appendix_arg_type = TypeOopPtr::make_from_constant(appendix_arg);
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 12741
diff changeset
   416
    Node* appendix_arg_node = _gvn.makecon(appendix_arg_type);
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 12741
diff changeset
   417
    push(appendix_arg_node);
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 12741
diff changeset
   418
  }
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 12741
diff changeset
   419
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   420
  // ---------------------
489c9b5090e2 Initial load
duke
parents:
diff changeset
   421
  // Does Class Hierarchy Analysis reveal only a single target of a v-call?
489c9b5090e2 Initial load
duke
parents:
diff changeset
   422
  // Then we may inline or make a static call, but become dependent on there being only 1 target.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   423
  // Does the call-site type profile reveal only one receiver?
489c9b5090e2 Initial load
duke
parents:
diff changeset
   424
  // Then we may introduce a run-time check and inline on the path where it succeeds.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   425
  // The other path may uncommon_trap, check for another receiver, or do a v-call.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   426
15118
1a1a6d1dfaab 8005418: JSR 292: virtual dispatch bug in 292 impl
twisti
parents: 15113
diff changeset
   427
  // Try to get the most accurate receiver type
1a1a6d1dfaab 8005418: JSR 292: virtual dispatch bug in 292 impl
twisti
parents: 15113
diff changeset
   428
  ciMethod* callee             = orig_callee;
1a1a6d1dfaab 8005418: JSR 292: virtual dispatch bug in 292 impl
twisti
parents: 15113
diff changeset
   429
  int       vtable_index       = Method::invalid_vtable_index;
1a1a6d1dfaab 8005418: JSR 292: virtual dispatch bug in 292 impl
twisti
parents: 15113
diff changeset
   430
  bool      call_does_dispatch = false;
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   431
489c9b5090e2 Initial load
duke
parents:
diff changeset
   432
  if (is_virtual_or_interface) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   433
    Node*             receiver_node = stack(sp() - nargs);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   434
    const TypeOopPtr* receiver_type = _gvn.type(receiver_node)->isa_oopptr();
15118
1a1a6d1dfaab 8005418: JSR 292: virtual dispatch bug in 292 impl
twisti
parents: 15113
diff changeset
   435
    // call_does_dispatch and vtable_index are out-parameters.  They might be changed.
1a1a6d1dfaab 8005418: JSR 292: virtual dispatch bug in 292 impl
twisti
parents: 15113
diff changeset
   436
    callee = C->optimize_virtual_call(method(), bci(), klass, orig_callee, receiver_type,
1a1a6d1dfaab 8005418: JSR 292: virtual dispatch bug in 292 impl
twisti
parents: 15113
diff changeset
   437
                                      is_virtual,
1a1a6d1dfaab 8005418: JSR 292: virtual dispatch bug in 292 impl
twisti
parents: 15113
diff changeset
   438
                                      call_does_dispatch, vtable_index);  // out-parameters
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   439
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   440
489c9b5090e2 Initial load
duke
parents:
diff changeset
   441
  // Note:  It's OK to try to inline a virtual call.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   442
  // The call generator will not attempt to inline a polymorphic call
489c9b5090e2 Initial load
duke
parents:
diff changeset
   443
  // unless it knows how to optimize the receiver dispatch.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   444
  bool try_inline = (C->do_inlining() || InlineAccessors);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   445
489c9b5090e2 Initial load
duke
parents:
diff changeset
   446
  // ---------------------
13391
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 12741
diff changeset
   447
  dec_sp(nargs);              // Temporarily pop args for JVM state of call
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   448
  JVMState* jvms = sync_jvms();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   449
489c9b5090e2 Initial load
duke
parents:
diff changeset
   450
  // ---------------------
489c9b5090e2 Initial load
duke
parents:
diff changeset
   451
  // Decide call tactic.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   452
  // This call checks with CHA, the interpreter profile, intrinsics table, etc.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   453
  // It decides whether inlining is desirable or not.
15118
1a1a6d1dfaab 8005418: JSR 292: virtual dispatch bug in 292 impl
twisti
parents: 15113
diff changeset
   454
  CallGenerator* cg = C->call_generator(callee, vtable_index, call_does_dispatch, jvms, try_inline, prof_factor());
13391
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 12741
diff changeset
   455
13522
5ad4627e792a 7192406: JSR 292: C2 needs exact return type information for invokedynamic and invokehandle call sites
twisti
parents: 13395
diff changeset
   456
  // NOTE:  Don't use orig_callee and callee after this point!  Use cg->method() instead.
5ad4627e792a 7192406: JSR 292: C2 needs exact return type information for invokedynamic and invokehandle call sites
twisti
parents: 13395
diff changeset
   457
  orig_callee = callee = NULL;
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   458
489c9b5090e2 Initial load
duke
parents:
diff changeset
   459
  // ---------------------
489c9b5090e2 Initial load
duke
parents:
diff changeset
   460
  // Round double arguments before call
13391
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 12741
diff changeset
   461
  round_double_arguments(cg->method());
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   462
489c9b5090e2 Initial load
duke
parents:
diff changeset
   463
#ifndef PRODUCT
489c9b5090e2 Initial load
duke
parents:
diff changeset
   464
  // bump global counters for calls
13391
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 12741
diff changeset
   465
  count_compiled_calls(/*at_method_entry*/ false, cg->is_inline());
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   466
489c9b5090e2 Initial load
duke
parents:
diff changeset
   467
  // Record first part of parsing work for this call
489c9b5090e2 Initial load
duke
parents:
diff changeset
   468
  parse_histogram()->record_change();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   469
#endif // not PRODUCT
489c9b5090e2 Initial load
duke
parents:
diff changeset
   470
489c9b5090e2 Initial load
duke
parents:
diff changeset
   471
  assert(jvms == this->jvms(), "still operating on the right JVMS");
489c9b5090e2 Initial load
duke
parents:
diff changeset
   472
  assert(jvms_in_sync(),       "jvms must carry full info into CG");
489c9b5090e2 Initial load
duke
parents:
diff changeset
   473
489c9b5090e2 Initial load
duke
parents:
diff changeset
   474
  // save across call, for a subsequent cast_not_null.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   475
  Node* receiver = has_receiver ? argument(0) : NULL;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   476
489c9b5090e2 Initial load
duke
parents:
diff changeset
   477
  // Bump method data counters (We profile *before* the call is made
489c9b5090e2 Initial load
duke
parents:
diff changeset
   478
  // because exceptions don't return to the call site.)
489c9b5090e2 Initial load
duke
parents:
diff changeset
   479
  profile_call(receiver);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   480
13391
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 12741
diff changeset
   481
  JVMState* new_jvms = cg->generate(jvms);
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 12741
diff changeset
   482
  if (new_jvms == NULL) {
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   483
    // When inlining attempt fails (e.g., too many arguments),
489c9b5090e2 Initial load
duke
parents:
diff changeset
   484
    // it may contaminate the current compile state, making it
489c9b5090e2 Initial load
duke
parents:
diff changeset
   485
    // impossible to pull back and try again.  Once we call
489c9b5090e2 Initial load
duke
parents:
diff changeset
   486
    // cg->generate(), we are committed.  If it fails, the whole
489c9b5090e2 Initial load
duke
parents:
diff changeset
   487
    // compilation task is compromised.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   488
    if (failing())  return;
12107
0d67c9f2abf2 6658428: C2 doesn't inline java method if corresponding intrinsic failed to inline.
never
parents: 11193
diff changeset
   489
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   490
    // This can happen if a library intrinsic is available, but refuses
489c9b5090e2 Initial load
duke
parents:
diff changeset
   491
    // the call site, perhaps because it did not match a pattern the
12107
0d67c9f2abf2 6658428: C2 doesn't inline java method if corresponding intrinsic failed to inline.
never
parents: 11193
diff changeset
   492
    // intrinsic was expecting to optimize. Should always be possible to
0d67c9f2abf2 6658428: C2 doesn't inline java method if corresponding intrinsic failed to inline.
never
parents: 11193
diff changeset
   493
    // get a normal java call that may inline in that case
15118
1a1a6d1dfaab 8005418: JSR 292: virtual dispatch bug in 292 impl
twisti
parents: 15113
diff changeset
   494
    cg = C->call_generator(cg->method(), vtable_index, call_does_dispatch, jvms, try_inline, prof_factor(), /* allow_intrinsics= */ false);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   495
    if ((new_jvms = cg->generate(jvms)) == NULL) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   496
      guarantee(failing(), "call failed to generate:  calls should work");
489c9b5090e2 Initial load
duke
parents:
diff changeset
   497
      return;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   498
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   499
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   500
489c9b5090e2 Initial load
duke
parents:
diff changeset
   501
  if (cg->is_inline()) {
240
a9ec1f7d29d6 6666343: Compile::has_loops not always set correctly
never
parents: 1
diff changeset
   502
    // Accumulate has_loops estimate
13391
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 12741
diff changeset
   503
    C->set_has_loops(C->has_loops() || cg->method()->has_loops());
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 12741
diff changeset
   504
    C->env()->notice_inlined_method(cg->method());
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   505
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   506
489c9b5090e2 Initial load
duke
parents:
diff changeset
   507
  // Reset parser state from [new_]jvms, which now carries results of the call.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   508
  // Return value (if any) is already pushed on the stack by the cg.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   509
  add_exception_states_from(new_jvms);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   510
  if (new_jvms->map()->control() == top()) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   511
    stop_and_kill_map();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   512
  } else {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   513
    assert(new_jvms->same_calls_as(jvms), "method/bci left unchanged");
489c9b5090e2 Initial load
duke
parents:
diff changeset
   514
    set_jvms(new_jvms);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   515
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   516
489c9b5090e2 Initial load
duke
parents:
diff changeset
   517
  if (!stopped()) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   518
    // This was some sort of virtual call, which did a null check for us.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   519
    // Now we can assert receiver-not-null, on the normal return path.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   520
    if (receiver != NULL && cg->is_virtual()) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   521
      Node* cast = cast_not_null(receiver);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   522
      // %%% assert(receiver == cast, "should already have cast the receiver");
489c9b5090e2 Initial load
duke
parents:
diff changeset
   523
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   524
489c9b5090e2 Initial load
duke
parents:
diff changeset
   525
    // Round double result after a call from strict to non-strict code
13391
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 12741
diff changeset
   526
    round_double_result(cg->method());
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 12741
diff changeset
   527
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 12741
diff changeset
   528
    ciType* rtype = cg->method()->return_type();
15118
1a1a6d1dfaab 8005418: JSR 292: virtual dispatch bug in 292 impl
twisti
parents: 15113
diff changeset
   529
    ciType* ctype = declared_signature->return_type();
1a1a6d1dfaab 8005418: JSR 292: virtual dispatch bug in 292 impl
twisti
parents: 15113
diff changeset
   530
1a1a6d1dfaab 8005418: JSR 292: virtual dispatch bug in 292 impl
twisti
parents: 15113
diff changeset
   531
    if (Bytecodes::has_optional_appendix(iter().cur_bc_raw()) || is_signature_polymorphic) {
13391
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 12741
diff changeset
   532
      // Be careful here with return types.
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 12741
diff changeset
   533
      if (ctype != rtype) {
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 12741
diff changeset
   534
        BasicType rt = rtype->basic_type();
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 12741
diff changeset
   535
        BasicType ct = ctype->basic_type();
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 12741
diff changeset
   536
        if (ct == T_VOID) {
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 12741
diff changeset
   537
          // It's OK for a method  to return a value that is discarded.
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 12741
diff changeset
   538
          // The discarding does not require any special action from the caller.
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 12741
diff changeset
   539
          // The Java code knows this, at VerifyType.isNullConversion.
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 12741
diff changeset
   540
          pop_node(rt);  // whatever it was, pop it
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 12741
diff changeset
   541
        } else if (rt == T_INT || is_subword_type(rt)) {
15118
1a1a6d1dfaab 8005418: JSR 292: virtual dispatch bug in 292 impl
twisti
parents: 15113
diff changeset
   542
          // Nothing.  These cases are handled in lambda form bytecode.
1a1a6d1dfaab 8005418: JSR 292: virtual dispatch bug in 292 impl
twisti
parents: 15113
diff changeset
   543
          assert(ct == T_INT || is_subword_type(ct), err_msg_res("must match: rt=%s, ct=%s", type2name(rt), type2name(ct)));
13395
edf37d840190 7188276: JSR 292: assert(ct == T_OBJECT) failed: rt=T_OBJECT, ct=13
twisti
parents: 13393
diff changeset
   544
        } else if (rt == T_OBJECT || rt == T_ARRAY) {
edf37d840190 7188276: JSR 292: assert(ct == T_OBJECT) failed: rt=T_OBJECT, ct=13
twisti
parents: 13393
diff changeset
   545
          assert(ct == T_OBJECT || ct == T_ARRAY, err_msg_res("rt=%s, ct=%s", type2name(rt), type2name(ct)));
13391
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 12741
diff changeset
   546
          if (ctype->is_loaded()) {
13522
5ad4627e792a 7192406: JSR 292: C2 needs exact return type information for invokedynamic and invokehandle call sites
twisti
parents: 13395
diff changeset
   547
            const TypeOopPtr* arg_type = TypeOopPtr::make_from_klass(rtype->as_klass());
5ad4627e792a 7192406: JSR 292: C2 needs exact return type information for invokedynamic and invokehandle call sites
twisti
parents: 13395
diff changeset
   548
            const Type*       sig_type = TypeOopPtr::make_from_klass(ctype->as_klass());
5ad4627e792a 7192406: JSR 292: C2 needs exact return type information for invokedynamic and invokehandle call sites
twisti
parents: 13395
diff changeset
   549
            if (arg_type != NULL && !arg_type->higher_equal(sig_type)) {
15118
1a1a6d1dfaab 8005418: JSR 292: virtual dispatch bug in 292 impl
twisti
parents: 15113
diff changeset
   550
              Node* retnode = pop();
13895
f6dfe4123709 7193318: C2: remove number of inputs requirement from Node's new operator
kvn
parents: 13884
diff changeset
   551
              Node* cast_obj = _gvn.transform(new (C) CheckCastPPNode(control(), retnode, sig_type));
13522
5ad4627e792a 7192406: JSR 292: C2 needs exact return type information for invokedynamic and invokehandle call sites
twisti
parents: 13395
diff changeset
   552
              push(cast_obj);
13391
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 12741
diff changeset
   553
            }
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 12741
diff changeset
   554
          }
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 12741
diff changeset
   555
        } else {
15118
1a1a6d1dfaab 8005418: JSR 292: virtual dispatch bug in 292 impl
twisti
parents: 15113
diff changeset
   556
          assert(rt == ct, err_msg_res("unexpected mismatch: rt=%s, ct=%s", type2name(rt), type2name(ct)));
13391
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 12741
diff changeset
   557
          // push a zero; it's better than getting an oop/int mismatch
15118
1a1a6d1dfaab 8005418: JSR 292: virtual dispatch bug in 292 impl
twisti
parents: 15113
diff changeset
   558
          pop_node(rt);
1a1a6d1dfaab 8005418: JSR 292: virtual dispatch bug in 292 impl
twisti
parents: 15113
diff changeset
   559
          Node* retnode = zerocon(ct);
13391
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 12741
diff changeset
   560
          push_node(ct, retnode);
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 12741
diff changeset
   561
        }
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 12741
diff changeset
   562
        // Now that the value is well-behaved, continue with the call-site type.
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 12741
diff changeset
   563
        rtype = ctype;
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 12741
diff changeset
   564
      }
15118
1a1a6d1dfaab 8005418: JSR 292: virtual dispatch bug in 292 impl
twisti
parents: 15113
diff changeset
   565
    } else {
15210
eb42543a7050 8006109: test/java/util/AbstractSequentialList/AddAll.java fails: assert(rtype == ctype) failed: mismatched return types
twisti
parents: 15118
diff changeset
   566
      // Symbolic resolution enforces the types to be the same.
eb42543a7050 8006109: test/java/util/AbstractSequentialList/AddAll.java fails: assert(rtype == ctype) failed: mismatched return types
twisti
parents: 15118
diff changeset
   567
      // NOTE: We must relax the assert for unloaded types because two
eb42543a7050 8006109: test/java/util/AbstractSequentialList/AddAll.java fails: assert(rtype == ctype) failed: mismatched return types
twisti
parents: 15118
diff changeset
   568
      // different ciType instances of the same unloaded class type
eb42543a7050 8006109: test/java/util/AbstractSequentialList/AddAll.java fails: assert(rtype == ctype) failed: mismatched return types
twisti
parents: 15118
diff changeset
   569
      // can appear to be "loaded" by different loaders (depending on
eb42543a7050 8006109: test/java/util/AbstractSequentialList/AddAll.java fails: assert(rtype == ctype) failed: mismatched return types
twisti
parents: 15118
diff changeset
   570
      // the accessing class).
eb42543a7050 8006109: test/java/util/AbstractSequentialList/AddAll.java fails: assert(rtype == ctype) failed: mismatched return types
twisti
parents: 15118
diff changeset
   571
      assert(!rtype->is_loaded() || !ctype->is_loaded() || rtype == ctype,
eb42543a7050 8006109: test/java/util/AbstractSequentialList/AddAll.java fails: assert(rtype == ctype) failed: mismatched return types
twisti
parents: 15118
diff changeset
   572
             err_msg_res("mismatched return types: rtype=%s, ctype=%s", rtype->name(), ctype->name()));
13391
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 12741
diff changeset
   573
    }
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   574
489c9b5090e2 Initial load
duke
parents:
diff changeset
   575
    // If the return type of the method is not loaded, assert that the
489c9b5090e2 Initial load
duke
parents:
diff changeset
   576
    // value we got is a null.  Otherwise, we need to recompile.
13391
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 12741
diff changeset
   577
    if (!rtype->is_loaded()) {
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   578
#ifndef PRODUCT
489c9b5090e2 Initial load
duke
parents:
diff changeset
   579
      if (PrintOpto && (Verbose || WizardMode)) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   580
        method()->print_name(); tty->print_cr(" asserting nullness of result at bci: %d", bci());
13391
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 12741
diff changeset
   581
        cg->method()->print_name(); tty->cr();
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   582
      }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   583
#endif
489c9b5090e2 Initial load
duke
parents:
diff changeset
   584
      if (C->log() != NULL) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   585
        C->log()->elem("assert_null reason='return' klass='%d'",
13391
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 12741
diff changeset
   586
                       C->log()->identify(rtype));
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   587
      }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   588
      // If there is going to be a trap, put it at the next bytecode:
489c9b5090e2 Initial load
duke
parents:
diff changeset
   589
      set_bci(iter().next_bci());
14621
fd9265ab0f67 7172640: C2: instrinsic implementations in LibraryCallKit should use argument() instead of pop()
twisti
parents: 14478
diff changeset
   590
      null_assert(peek());
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   591
      set_bci(iter().cur_bci()); // put it back
489c9b5090e2 Initial load
duke
parents:
diff changeset
   592
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   593
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   594
489c9b5090e2 Initial load
duke
parents:
diff changeset
   595
  // Restart record of parsing work after possible inlining of call
489c9b5090e2 Initial load
duke
parents:
diff changeset
   596
#ifndef PRODUCT
489c9b5090e2 Initial load
duke
parents:
diff changeset
   597
  parse_histogram()->set_initial_state(bc());
489c9b5090e2 Initial load
duke
parents:
diff changeset
   598
#endif
489c9b5090e2 Initial load
duke
parents:
diff changeset
   599
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   600
489c9b5090e2 Initial load
duke
parents:
diff changeset
   601
//---------------------------catch_call_exceptions-----------------------------
489c9b5090e2 Initial load
duke
parents:
diff changeset
   602
// Put a Catch and CatchProj nodes behind a just-created call.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   603
// Send their caught exceptions to the proper handler.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   604
// This may be used after a call to the rethrow VM stub,
489c9b5090e2 Initial load
duke
parents:
diff changeset
   605
// when it is needed to process unloaded exception classes.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   606
void Parse::catch_call_exceptions(ciExceptionHandlerStream& handlers) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   607
  // Exceptions are delivered through this channel:
489c9b5090e2 Initial load
duke
parents:
diff changeset
   608
  Node* i_o = this->i_o();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   609
489c9b5090e2 Initial load
duke
parents:
diff changeset
   610
  // Add a CatchNode.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   611
  GrowableArray<int>* bcis = new (C->node_arena()) GrowableArray<int>(C->node_arena(), 8, 0, -1);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   612
  GrowableArray<const Type*>* extypes = new (C->node_arena()) GrowableArray<const Type*>(C->node_arena(), 8, 0, NULL);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   613
  GrowableArray<int>* saw_unloaded = new (C->node_arena()) GrowableArray<int>(C->node_arena(), 8, 0, 0);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   614
489c9b5090e2 Initial load
duke
parents:
diff changeset
   615
  for (; !handlers.is_done(); handlers.next()) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   616
    ciExceptionHandler* h        = handlers.handler();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   617
    int                 h_bci    = h->handler_bci();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   618
    ciInstanceKlass*    h_klass  = h->is_catch_all() ? env()->Throwable_klass() : h->catch_klass();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   619
    // Do not introduce unloaded exception types into the graph:
489c9b5090e2 Initial load
duke
parents:
diff changeset
   620
    if (!h_klass->is_loaded()) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   621
      if (saw_unloaded->contains(h_bci)) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   622
        /* We've already seen an unloaded exception with h_bci,
489c9b5090e2 Initial load
duke
parents:
diff changeset
   623
           so don't duplicate. Duplication will cause the CatchNode to be
489c9b5090e2 Initial load
duke
parents:
diff changeset
   624
           unnecessarily large. See 4713716. */
489c9b5090e2 Initial load
duke
parents:
diff changeset
   625
        continue;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   626
      } else {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   627
        saw_unloaded->append(h_bci);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   628
      }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   629
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   630
    const Type*         h_extype = TypeOopPtr::make_from_klass(h_klass);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   631
    // (We use make_from_klass because it respects UseUniqueSubclasses.)
489c9b5090e2 Initial load
duke
parents:
diff changeset
   632
    h_extype = h_extype->join(TypeInstPtr::NOTNULL);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   633
    assert(!h_extype->empty(), "sanity");
489c9b5090e2 Initial load
duke
parents:
diff changeset
   634
    // Note:  It's OK if the BCIs repeat themselves.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   635
    bcis->append(h_bci);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   636
    extypes->append(h_extype);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   637
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   638
489c9b5090e2 Initial load
duke
parents:
diff changeset
   639
  int len = bcis->length();
13895
f6dfe4123709 7193318: C2: remove number of inputs requirement from Node's new operator
kvn
parents: 13884
diff changeset
   640
  CatchNode *cn = new (C) CatchNode(control(), i_o, len+1);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   641
  Node *catch_ = _gvn.transform(cn);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   642
489c9b5090e2 Initial load
duke
parents:
diff changeset
   643
  // now branch with the exception state to each of the (potential)
489c9b5090e2 Initial load
duke
parents:
diff changeset
   644
  // handlers
489c9b5090e2 Initial load
duke
parents:
diff changeset
   645
  for(int i=0; i < len; i++) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   646
    // Setup JVM state to enter the handler.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   647
    PreserveJVMState pjvms(this);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   648
    // Locals are just copied from before the call.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   649
    // Get control from the CatchNode.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   650
    int handler_bci = bcis->at(i);
13895
f6dfe4123709 7193318: C2: remove number of inputs requirement from Node's new operator
kvn
parents: 13884
diff changeset
   651
    Node* ctrl = _gvn.transform( new (C) CatchProjNode(catch_, i+1,handler_bci));
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   652
    // This handler cannot happen?
489c9b5090e2 Initial load
duke
parents:
diff changeset
   653
    if (ctrl == top())  continue;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   654
    set_control(ctrl);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   655
489c9b5090e2 Initial load
duke
parents:
diff changeset
   656
    // Create exception oop
489c9b5090e2 Initial load
duke
parents:
diff changeset
   657
    const TypeInstPtr* extype = extypes->at(i)->is_instptr();
13895
f6dfe4123709 7193318: C2: remove number of inputs requirement from Node's new operator
kvn
parents: 13884
diff changeset
   658
    Node *ex_oop = _gvn.transform(new (C) CreateExNode(extypes->at(i), ctrl, i_o));
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   659
489c9b5090e2 Initial load
duke
parents:
diff changeset
   660
    // Handle unloaded exception classes.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   661
    if (saw_unloaded->contains(handler_bci)) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   662
      // An unloaded exception type is coming here.  Do an uncommon trap.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   663
#ifndef PRODUCT
489c9b5090e2 Initial load
duke
parents:
diff changeset
   664
      // We do not expect the same handler bci to take both cold unloaded
489c9b5090e2 Initial load
duke
parents:
diff changeset
   665
      // and hot loaded exceptions.  But, watch for it.
13392
1ef07ae0723d 7187290: nightly failures after JSR 292 lazy method handle update
twisti
parents: 13391
diff changeset
   666
      if ((Verbose || WizardMode) && extype->is_loaded()) {
1ef07ae0723d 7187290: nightly failures after JSR 292 lazy method handle update
twisti
parents: 13391
diff changeset
   667
        tty->print("Warning: Handler @%d takes mixed loaded/unloaded exceptions in ", bci());
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   668
        method()->print_name(); tty->cr();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   669
      } else if (PrintOpto && (Verbose || WizardMode)) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   670
        tty->print("Bailing out on unloaded exception type ");
489c9b5090e2 Initial load
duke
parents:
diff changeset
   671
        extype->klass()->print_name();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   672
        tty->print(" at bci:%d in ", bci());
489c9b5090e2 Initial load
duke
parents:
diff changeset
   673
        method()->print_name(); tty->cr();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   674
      }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   675
#endif
489c9b5090e2 Initial load
duke
parents:
diff changeset
   676
      // Emit an uncommon trap instead of processing the block.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   677
      set_bci(handler_bci);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   678
      push_ex_oop(ex_oop);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   679
      uncommon_trap(Deoptimization::Reason_unloaded,
489c9b5090e2 Initial load
duke
parents:
diff changeset
   680
                    Deoptimization::Action_reinterpret,
489c9b5090e2 Initial load
duke
parents:
diff changeset
   681
                    extype->klass(), "!loaded exception");
489c9b5090e2 Initial load
duke
parents:
diff changeset
   682
      set_bci(iter().cur_bci()); // put it back
489c9b5090e2 Initial load
duke
parents:
diff changeset
   683
      continue;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   684
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   685
489c9b5090e2 Initial load
duke
parents:
diff changeset
   686
    // go to the exception handler
489c9b5090e2 Initial load
duke
parents:
diff changeset
   687
    if (handler_bci < 0) {     // merge with corresponding rethrow node
489c9b5090e2 Initial load
duke
parents:
diff changeset
   688
      throw_to_exit(make_exception_state(ex_oop));
489c9b5090e2 Initial load
duke
parents:
diff changeset
   689
    } else {                      // Else jump to corresponding handle
489c9b5090e2 Initial load
duke
parents:
diff changeset
   690
      push_ex_oop(ex_oop);        // Clear stack and push just the oop.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   691
      merge_exception(handler_bci);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   692
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   693
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   694
489c9b5090e2 Initial load
duke
parents:
diff changeset
   695
  // The first CatchProj is for the normal return.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   696
  // (Note:  If this is a call to rethrow_Java, this node goes dead.)
13895
f6dfe4123709 7193318: C2: remove number of inputs requirement from Node's new operator
kvn
parents: 13884
diff changeset
   697
  set_control(_gvn.transform( new (C) CatchProjNode(catch_, CatchProjNode::fall_through_index, CatchProjNode::no_handler_bci)));
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   698
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   699
489c9b5090e2 Initial load
duke
parents:
diff changeset
   700
489c9b5090e2 Initial load
duke
parents:
diff changeset
   701
//----------------------------catch_inline_exceptions--------------------------
489c9b5090e2 Initial load
duke
parents:
diff changeset
   702
// Handle all exceptions thrown by an inlined method or individual bytecode.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   703
// Common case 1: we have no handler, so all exceptions merge right into
489c9b5090e2 Initial load
duke
parents:
diff changeset
   704
// the rethrow case.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   705
// Case 2: we have some handlers, with loaded exception klasses that have
489c9b5090e2 Initial load
duke
parents:
diff changeset
   706
// no subklasses.  We do a Deutsch-Shiffman style type-check on the incoming
489c9b5090e2 Initial load
duke
parents:
diff changeset
   707
// exception oop and branch to the handler directly.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   708
// Case 3: We have some handlers with subklasses or are not loaded at
489c9b5090e2 Initial load
duke
parents:
diff changeset
   709
// compile-time.  We have to call the runtime to resolve the exception.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   710
// So we insert a RethrowCall and all the logic that goes with it.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   711
void Parse::catch_inline_exceptions(SafePointNode* ex_map) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   712
  // Caller is responsible for saving away the map for normal control flow!
489c9b5090e2 Initial load
duke
parents:
diff changeset
   713
  assert(stopped(), "call set_map(NULL) first");
489c9b5090e2 Initial load
duke
parents:
diff changeset
   714
  assert(method()->has_exception_handlers(), "don't come here w/o work to do");
489c9b5090e2 Initial load
duke
parents:
diff changeset
   715
489c9b5090e2 Initial load
duke
parents:
diff changeset
   716
  Node* ex_node = saved_ex_oop(ex_map);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   717
  if (ex_node == top()) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   718
    // No action needed.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   719
    return;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   720
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   721
  const TypeInstPtr* ex_type = _gvn.type(ex_node)->isa_instptr();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   722
  NOT_PRODUCT(if (ex_type==NULL) tty->print_cr("*** Exception not InstPtr"));
489c9b5090e2 Initial load
duke
parents:
diff changeset
   723
  if (ex_type == NULL)
489c9b5090e2 Initial load
duke
parents:
diff changeset
   724
    ex_type = TypeOopPtr::make_from_klass(env()->Throwable_klass())->is_instptr();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   725
489c9b5090e2 Initial load
duke
parents:
diff changeset
   726
  // determine potential exception handlers
489c9b5090e2 Initial load
duke
parents:
diff changeset
   727
  ciExceptionHandlerStream handlers(method(), bci(),
489c9b5090e2 Initial load
duke
parents:
diff changeset
   728
                                    ex_type->klass()->as_instance_klass(),
489c9b5090e2 Initial load
duke
parents:
diff changeset
   729
                                    ex_type->klass_is_exact());
489c9b5090e2 Initial load
duke
parents:
diff changeset
   730
489c9b5090e2 Initial load
duke
parents:
diff changeset
   731
  // Start executing from the given throw state.  (Keep its stack, for now.)
489c9b5090e2 Initial load
duke
parents:
diff changeset
   732
  // Get the exception oop as known at compile time.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   733
  ex_node = use_exception_state(ex_map);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   734
489c9b5090e2 Initial load
duke
parents:
diff changeset
   735
  // Get the exception oop klass from its header
489c9b5090e2 Initial load
duke
parents:
diff changeset
   736
  Node* ex_klass_node = NULL;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   737
  if (has_ex_handler() && !ex_type->klass_is_exact()) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   738
    Node* p = basic_plus_adr( ex_node, ex_node, oopDesc::klass_offset_in_bytes());
590
2954744d7bba 6703890: Compressed Oops: add LoadNKlass node to generate narrow oops (32-bits) compare instructions
kvn
parents: 240
diff changeset
   739
    ex_klass_node = _gvn.transform( LoadKlassNode::make(_gvn, immutable_memory(), p, TypeInstPtr::KLASS, TypeKlassPtr::OBJECT) );
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   740
489c9b5090e2 Initial load
duke
parents:
diff changeset
   741
    // Compute the exception klass a little more cleverly.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   742
    // Obvious solution is to simple do a LoadKlass from the 'ex_node'.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   743
    // However, if the ex_node is a PhiNode, I'm going to do a LoadKlass for
489c9b5090e2 Initial load
duke
parents:
diff changeset
   744
    // each arm of the Phi.  If I know something clever about the exceptions
489c9b5090e2 Initial load
duke
parents:
diff changeset
   745
    // I'm loading the class from, I can replace the LoadKlass with the
489c9b5090e2 Initial load
duke
parents:
diff changeset
   746
    // klass constant for the exception oop.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   747
    if( ex_node->is_Phi() ) {
13895
f6dfe4123709 7193318: C2: remove number of inputs requirement from Node's new operator
kvn
parents: 13884
diff changeset
   748
      ex_klass_node = new (C) PhiNode( ex_node->in(0), TypeKlassPtr::OBJECT );
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   749
      for( uint i = 1; i < ex_node->req(); i++ ) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   750
        Node* p = basic_plus_adr( ex_node->in(i), ex_node->in(i), oopDesc::klass_offset_in_bytes() );
590
2954744d7bba 6703890: Compressed Oops: add LoadNKlass node to generate narrow oops (32-bits) compare instructions
kvn
parents: 240
diff changeset
   751
        Node* k = _gvn.transform( LoadKlassNode::make(_gvn, immutable_memory(), p, TypeInstPtr::KLASS, TypeKlassPtr::OBJECT) );
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   752
        ex_klass_node->init_req( i, k );
489c9b5090e2 Initial load
duke
parents:
diff changeset
   753
      }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   754
      _gvn.set_type(ex_klass_node, TypeKlassPtr::OBJECT);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   755
489c9b5090e2 Initial load
duke
parents:
diff changeset
   756
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   757
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   758
489c9b5090e2 Initial load
duke
parents:
diff changeset
   759
  // Scan the exception table for applicable handlers.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   760
  // If none, we can call rethrow() and be done!
489c9b5090e2 Initial load
duke
parents:
diff changeset
   761
  // If precise (loaded with no subklasses), insert a D.S. style
489c9b5090e2 Initial load
duke
parents:
diff changeset
   762
  // pointer compare to the correct handler and loop back.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   763
  // If imprecise, switch to the Rethrow VM-call style handling.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   764
489c9b5090e2 Initial load
duke
parents:
diff changeset
   765
  int remaining = handlers.count_remaining();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   766
489c9b5090e2 Initial load
duke
parents:
diff changeset
   767
  // iterate through all entries sequentially
489c9b5090e2 Initial load
duke
parents:
diff changeset
   768
  for (;!handlers.is_done(); handlers.next()) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   769
    ciExceptionHandler* handler = handlers.handler();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   770
489c9b5090e2 Initial load
duke
parents:
diff changeset
   771
    if (handler->is_rethrow()) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   772
      // If we fell off the end of the table without finding an imprecise
489c9b5090e2 Initial load
duke
parents:
diff changeset
   773
      // exception klass (and without finding a generic handler) then we
489c9b5090e2 Initial load
duke
parents:
diff changeset
   774
      // know this exception is not handled in this method.  We just rethrow
489c9b5090e2 Initial load
duke
parents:
diff changeset
   775
      // the exception into the caller.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   776
      throw_to_exit(make_exception_state(ex_node));
489c9b5090e2 Initial load
duke
parents:
diff changeset
   777
      return;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   778
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   779
489c9b5090e2 Initial load
duke
parents:
diff changeset
   780
    // exception handler bci range covers throw_bci => investigate further
489c9b5090e2 Initial load
duke
parents:
diff changeset
   781
    int handler_bci = handler->handler_bci();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   782
489c9b5090e2 Initial load
duke
parents:
diff changeset
   783
    if (remaining == 1) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   784
      push_ex_oop(ex_node);        // Push exception oop for handler
489c9b5090e2 Initial load
duke
parents:
diff changeset
   785
#ifndef PRODUCT
489c9b5090e2 Initial load
duke
parents:
diff changeset
   786
      if (PrintOpto && WizardMode) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   787
        tty->print_cr("  Catching every inline exception bci:%d -> handler_bci:%d", bci(), handler_bci);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   788
      }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   789
#endif
489c9b5090e2 Initial load
duke
parents:
diff changeset
   790
      merge_exception(handler_bci); // jump to handler
489c9b5090e2 Initial load
duke
parents:
diff changeset
   791
      return;                   // No more handling to be done here!
489c9b5090e2 Initial load
duke
parents:
diff changeset
   792
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   793
5228
2b4da47127ba 6926979: should simplify catch_inline_exception
never
parents: 4892
diff changeset
   794
    // Get the handler's klass
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   795
    ciInstanceKlass* klass = handler->catch_klass();
5228
2b4da47127ba 6926979: should simplify catch_inline_exception
never
parents: 4892
diff changeset
   796
2b4da47127ba 6926979: should simplify catch_inline_exception
never
parents: 4892
diff changeset
   797
    if (!klass->is_loaded()) {  // klass is not loaded?
2b4da47127ba 6926979: should simplify catch_inline_exception
never
parents: 4892
diff changeset
   798
      // fall through into catch_call_exceptions which will emit a
2b4da47127ba 6926979: should simplify catch_inline_exception
never
parents: 4892
diff changeset
   799
      // handler with an uncommon trap.
2b4da47127ba 6926979: should simplify catch_inline_exception
never
parents: 4892
diff changeset
   800
      break;
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   801
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   802
489c9b5090e2 Initial load
duke
parents:
diff changeset
   803
    if (klass->is_interface())  // should not happen, but...
489c9b5090e2 Initial load
duke
parents:
diff changeset
   804
      break;                    // bail out
489c9b5090e2 Initial load
duke
parents:
diff changeset
   805
5228
2b4da47127ba 6926979: should simplify catch_inline_exception
never
parents: 4892
diff changeset
   806
    // Check the type of the exception against the catch type
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   807
    const TypeKlassPtr *tk = TypeKlassPtr::make(klass);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   808
    Node* con = _gvn.makecon(tk);
5228
2b4da47127ba 6926979: should simplify catch_inline_exception
never
parents: 4892
diff changeset
   809
    Node* not_subtype_ctrl = gen_subtype_check(ex_klass_node, con);
2b4da47127ba 6926979: should simplify catch_inline_exception
never
parents: 4892
diff changeset
   810
    if (!stopped()) {
2b4da47127ba 6926979: should simplify catch_inline_exception
never
parents: 4892
diff changeset
   811
      PreserveJVMState pjvms(this);
2b4da47127ba 6926979: should simplify catch_inline_exception
never
parents: 4892
diff changeset
   812
      const TypeInstPtr* tinst = TypeOopPtr::make_from_klass_unique(klass)->cast_to_ptr_type(TypePtr::NotNull)->is_instptr();
2b4da47127ba 6926979: should simplify catch_inline_exception
never
parents: 4892
diff changeset
   813
      assert(klass->has_subklass() || tinst->klass_is_exact(), "lost exactness");
13895
f6dfe4123709 7193318: C2: remove number of inputs requirement from Node's new operator
kvn
parents: 13884
diff changeset
   814
      Node* ex_oop = _gvn.transform(new (C) CheckCastPPNode(control(), ex_node, tinst));
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   815
      push_ex_oop(ex_oop);      // Push exception oop for handler
489c9b5090e2 Initial load
duke
parents:
diff changeset
   816
#ifndef PRODUCT
489c9b5090e2 Initial load
duke
parents:
diff changeset
   817
      if (PrintOpto && WizardMode) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   818
        tty->print("  Catching inline exception bci:%d -> handler_bci:%d -- ", bci(), handler_bci);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   819
        klass->print_name();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   820
        tty->cr();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   821
      }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   822
#endif
489c9b5090e2 Initial load
duke
parents:
diff changeset
   823
      merge_exception(handler_bci);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   824
    }
5228
2b4da47127ba 6926979: should simplify catch_inline_exception
never
parents: 4892
diff changeset
   825
    set_control(not_subtype_ctrl);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   826
489c9b5090e2 Initial load
duke
parents:
diff changeset
   827
    // Come here if exception does not match handler.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   828
    // Carry on with more handler checks.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   829
    --remaining;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   830
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   831
489c9b5090e2 Initial load
duke
parents:
diff changeset
   832
  assert(!stopped(), "you should return if you finish the chain");
489c9b5090e2 Initial load
duke
parents:
diff changeset
   833
489c9b5090e2 Initial load
duke
parents:
diff changeset
   834
  // Oops, need to call into the VM to resolve the klasses at runtime.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   835
  // Note:  This call must not deoptimize, since it is not a real at this bci!
489c9b5090e2 Initial load
duke
parents:
diff changeset
   836
  kill_dead_locals();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   837
489c9b5090e2 Initial load
duke
parents:
diff changeset
   838
  make_runtime_call(RC_NO_LEAF | RC_MUST_THROW,
489c9b5090e2 Initial load
duke
parents:
diff changeset
   839
                    OptoRuntime::rethrow_Type(),
489c9b5090e2 Initial load
duke
parents:
diff changeset
   840
                    OptoRuntime::rethrow_stub(),
489c9b5090e2 Initial load
duke
parents:
diff changeset
   841
                    NULL, NULL,
489c9b5090e2 Initial load
duke
parents:
diff changeset
   842
                    ex_node);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   843
489c9b5090e2 Initial load
duke
parents:
diff changeset
   844
  // Rethrow is a pure call, no side effects, only a result.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   845
  // The result cannot be allocated, so we use I_O
489c9b5090e2 Initial load
duke
parents:
diff changeset
   846
489c9b5090e2 Initial load
duke
parents:
diff changeset
   847
  // Catch exceptions from the rethrow
489c9b5090e2 Initial load
duke
parents:
diff changeset
   848
  catch_call_exceptions(handlers);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   849
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   850
489c9b5090e2 Initial load
duke
parents:
diff changeset
   851
489c9b5090e2 Initial load
duke
parents:
diff changeset
   852
// (Note:  Moved add_debug_info into GraphKit::add_safepoint_edges.)
489c9b5090e2 Initial load
duke
parents:
diff changeset
   853
489c9b5090e2 Initial load
duke
parents:
diff changeset
   854
489c9b5090e2 Initial load
duke
parents:
diff changeset
   855
#ifndef PRODUCT
489c9b5090e2 Initial load
duke
parents:
diff changeset
   856
void Parse::count_compiled_calls(bool at_method_entry, bool is_inline) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   857
  if( CountCompiledCalls ) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   858
    if( at_method_entry ) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   859
      // bump invocation counter if top method (for statistics)
489c9b5090e2 Initial load
duke
parents:
diff changeset
   860
      if (CountCompiledCalls && depth() == 1) {
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13522
diff changeset
   861
        const TypePtr* addr_type = TypeMetadataPtr::make(method());
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   862
        Node* adr1 = makecon(addr_type);
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13522
diff changeset
   863
        Node* adr2 = basic_plus_adr(adr1, adr1, in_bytes(Method::compiled_invocation_counter_offset()));
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   864
        increment_counter(adr2);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   865
      }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   866
    } else if (is_inline) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   867
      switch (bc()) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   868
      case Bytecodes::_invokevirtual:   increment_counter(SharedRuntime::nof_inlined_calls_addr()); break;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   869
      case Bytecodes::_invokeinterface: increment_counter(SharedRuntime::nof_inlined_interface_calls_addr()); break;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   870
      case Bytecodes::_invokestatic:
2570
ecc7862946d4 6655646: dynamic languages need dynamically linked call sites
jrose
parents: 1399
diff changeset
   871
      case Bytecodes::_invokedynamic:
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   872
      case Bytecodes::_invokespecial:   increment_counter(SharedRuntime::nof_inlined_static_calls_addr()); break;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   873
      default: fatal("unexpected call bytecode");
489c9b5090e2 Initial load
duke
parents:
diff changeset
   874
      }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   875
    } else {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   876
      switch (bc()) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   877
      case Bytecodes::_invokevirtual:   increment_counter(SharedRuntime::nof_normal_calls_addr()); break;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   878
      case Bytecodes::_invokeinterface: increment_counter(SharedRuntime::nof_interface_calls_addr()); break;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   879
      case Bytecodes::_invokestatic:
2570
ecc7862946d4 6655646: dynamic languages need dynamically linked call sites
jrose
parents: 1399
diff changeset
   880
      case Bytecodes::_invokedynamic:
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   881
      case Bytecodes::_invokespecial:   increment_counter(SharedRuntime::nof_static_calls_addr()); break;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   882
      default: fatal("unexpected call bytecode");
489c9b5090e2 Initial load
duke
parents:
diff changeset
   883
      }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   884
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   885
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   886
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   887
#endif //PRODUCT
489c9b5090e2 Initial load
duke
parents:
diff changeset
   888
489c9b5090e2 Initial load
duke
parents:
diff changeset
   889
15118
1a1a6d1dfaab 8005418: JSR 292: virtual dispatch bug in 292 impl
twisti
parents: 15113
diff changeset
   890
ciMethod* Compile::optimize_virtual_call(ciMethod* caller, int bci, ciInstanceKlass* klass,
1a1a6d1dfaab 8005418: JSR 292: virtual dispatch bug in 292 impl
twisti
parents: 15113
diff changeset
   891
                                         ciMethod* callee, const TypeOopPtr* receiver_type,
1a1a6d1dfaab 8005418: JSR 292: virtual dispatch bug in 292 impl
twisti
parents: 15113
diff changeset
   892
                                         bool is_virtual,
1a1a6d1dfaab 8005418: JSR 292: virtual dispatch bug in 292 impl
twisti
parents: 15113
diff changeset
   893
                                         bool& call_does_dispatch, int& vtable_index) {
1a1a6d1dfaab 8005418: JSR 292: virtual dispatch bug in 292 impl
twisti
parents: 15113
diff changeset
   894
  // Set default values for out-parameters.
1a1a6d1dfaab 8005418: JSR 292: virtual dispatch bug in 292 impl
twisti
parents: 15113
diff changeset
   895
  call_does_dispatch = true;
1a1a6d1dfaab 8005418: JSR 292: virtual dispatch bug in 292 impl
twisti
parents: 15113
diff changeset
   896
  vtable_index       = Method::invalid_vtable_index;
1a1a6d1dfaab 8005418: JSR 292: virtual dispatch bug in 292 impl
twisti
parents: 15113
diff changeset
   897
1a1a6d1dfaab 8005418: JSR 292: virtual dispatch bug in 292 impl
twisti
parents: 15113
diff changeset
   898
  // Choose call strategy.
1a1a6d1dfaab 8005418: JSR 292: virtual dispatch bug in 292 impl
twisti
parents: 15113
diff changeset
   899
  ciMethod* optimized_virtual_method = optimize_inlining(caller, bci, klass, callee, receiver_type);
1a1a6d1dfaab 8005418: JSR 292: virtual dispatch bug in 292 impl
twisti
parents: 15113
diff changeset
   900
1a1a6d1dfaab 8005418: JSR 292: virtual dispatch bug in 292 impl
twisti
parents: 15113
diff changeset
   901
  // Have the call been sufficiently improved such that it is no longer a virtual?
1a1a6d1dfaab 8005418: JSR 292: virtual dispatch bug in 292 impl
twisti
parents: 15113
diff changeset
   902
  if (optimized_virtual_method != NULL) {
1a1a6d1dfaab 8005418: JSR 292: virtual dispatch bug in 292 impl
twisti
parents: 15113
diff changeset
   903
    callee             = optimized_virtual_method;
1a1a6d1dfaab 8005418: JSR 292: virtual dispatch bug in 292 impl
twisti
parents: 15113
diff changeset
   904
    call_does_dispatch = false;
1a1a6d1dfaab 8005418: JSR 292: virtual dispatch bug in 292 impl
twisti
parents: 15113
diff changeset
   905
  } else if (!UseInlineCaches && is_virtual && callee->is_loaded()) {
1a1a6d1dfaab 8005418: JSR 292: virtual dispatch bug in 292 impl
twisti
parents: 15113
diff changeset
   906
    // We can make a vtable call at this site
1a1a6d1dfaab 8005418: JSR 292: virtual dispatch bug in 292 impl
twisti
parents: 15113
diff changeset
   907
    vtable_index = callee->resolve_vtable_index(caller->holder(), klass);
1a1a6d1dfaab 8005418: JSR 292: virtual dispatch bug in 292 impl
twisti
parents: 15113
diff changeset
   908
  }
1a1a6d1dfaab 8005418: JSR 292: virtual dispatch bug in 292 impl
twisti
parents: 15113
diff changeset
   909
  return callee;
1a1a6d1dfaab 8005418: JSR 292: virtual dispatch bug in 292 impl
twisti
parents: 15113
diff changeset
   910
}
1a1a6d1dfaab 8005418: JSR 292: virtual dispatch bug in 292 impl
twisti
parents: 15113
diff changeset
   911
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   912
// Identify possible target method and inlining style
15118
1a1a6d1dfaab 8005418: JSR 292: virtual dispatch bug in 292 impl
twisti
parents: 15113
diff changeset
   913
ciMethod* Compile::optimize_inlining(ciMethod* caller, int bci, ciInstanceKlass* klass,
1a1a6d1dfaab 8005418: JSR 292: virtual dispatch bug in 292 impl
twisti
parents: 15113
diff changeset
   914
                                     ciMethod* callee, const TypeOopPtr* receiver_type) {
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   915
  // only use for virtual or interface calls
489c9b5090e2 Initial load
duke
parents:
diff changeset
   916
489c9b5090e2 Initial load
duke
parents:
diff changeset
   917
  // If it is obviously final, do not bother to call find_monomorphic_target,
489c9b5090e2 Initial load
duke
parents:
diff changeset
   918
  // because the class hierarchy checks are not needed, and may fail due to
489c9b5090e2 Initial load
duke
parents:
diff changeset
   919
  // incompletely loaded classes.  Since we do our own class loading checks
489c9b5090e2 Initial load
duke
parents:
diff changeset
   920
  // in this module, we may confidently bind to any method.
15118
1a1a6d1dfaab 8005418: JSR 292: virtual dispatch bug in 292 impl
twisti
parents: 15113
diff changeset
   921
  if (callee->can_be_statically_bound()) {
1a1a6d1dfaab 8005418: JSR 292: virtual dispatch bug in 292 impl
twisti
parents: 15113
diff changeset
   922
    return callee;
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   923
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   924
489c9b5090e2 Initial load
duke
parents:
diff changeset
   925
  // Attempt to improve the receiver
489c9b5090e2 Initial load
duke
parents:
diff changeset
   926
  bool actual_receiver_is_exact = false;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   927
  ciInstanceKlass* actual_receiver = klass;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   928
  if (receiver_type != NULL) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   929
    // Array methods are all inherited from Object, and are monomorphic.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   930
    if (receiver_type->isa_aryptr() &&
15118
1a1a6d1dfaab 8005418: JSR 292: virtual dispatch bug in 292 impl
twisti
parents: 15113
diff changeset
   931
        callee->holder() == env()->Object_klass()) {
1a1a6d1dfaab 8005418: JSR 292: virtual dispatch bug in 292 impl
twisti
parents: 15113
diff changeset
   932
      return callee;
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   933
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   934
489c9b5090e2 Initial load
duke
parents:
diff changeset
   935
    // All other interesting cases are instance klasses.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   936
    if (!receiver_type->isa_instptr()) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   937
      return NULL;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   938
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   939
489c9b5090e2 Initial load
duke
parents:
diff changeset
   940
    ciInstanceKlass *ikl = receiver_type->klass()->as_instance_klass();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   941
    if (ikl->is_loaded() && ikl->is_initialized() && !ikl->is_interface() &&
1399
9648dfd4ce09 6384206: Phis which are later unneeded are impairing our ability to inline based on static types
never
parents: 670
diff changeset
   942
        (ikl == actual_receiver || ikl->is_subtype_of(actual_receiver))) {
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   943
      // ikl is a same or better type than the original actual_receiver,
489c9b5090e2 Initial load
duke
parents:
diff changeset
   944
      // e.g. static receiver from bytecodes.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   945
      actual_receiver = ikl;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   946
      // Is the actual_receiver exact?
489c9b5090e2 Initial load
duke
parents:
diff changeset
   947
      actual_receiver_is_exact = receiver_type->klass_is_exact();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   948
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   949
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   950
489c9b5090e2 Initial load
duke
parents:
diff changeset
   951
  ciInstanceKlass*   calling_klass = caller->holder();
15118
1a1a6d1dfaab 8005418: JSR 292: virtual dispatch bug in 292 impl
twisti
parents: 15113
diff changeset
   952
  ciMethod* cha_monomorphic_target = callee->find_monomorphic_target(calling_klass, klass, actual_receiver);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   953
  if (cha_monomorphic_target != NULL) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   954
    assert(!cha_monomorphic_target->is_abstract(), "");
489c9b5090e2 Initial load
duke
parents:
diff changeset
   955
    // Look at the method-receiver type.  Does it add "too much information"?
489c9b5090e2 Initial load
duke
parents:
diff changeset
   956
    ciKlass*    mr_klass = cha_monomorphic_target->holder();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   957
    const Type* mr_type  = TypeInstPtr::make(TypePtr::BotPTR, mr_klass);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   958
    if (receiver_type == NULL || !receiver_type->higher_equal(mr_type)) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   959
      // Calling this method would include an implicit cast to its holder.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   960
      // %%% Not yet implemented.  Would throw minor asserts at present.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   961
      // %%% The most common wins are already gained by +UseUniqueSubclasses.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   962
      // To fix, put the higher_equal check at the call of this routine,
489c9b5090e2 Initial load
duke
parents:
diff changeset
   963
      // and add a CheckCastPP to the receiver.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   964
      if (TraceDependencies) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   965
        tty->print_cr("found unique CHA method, but could not cast up");
489c9b5090e2 Initial load
duke
parents:
diff changeset
   966
        tty->print("  method  = ");
489c9b5090e2 Initial load
duke
parents:
diff changeset
   967
        cha_monomorphic_target->print();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   968
        tty->cr();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   969
      }
15118
1a1a6d1dfaab 8005418: JSR 292: virtual dispatch bug in 292 impl
twisti
parents: 15113
diff changeset
   970
      if (log() != NULL) {
1a1a6d1dfaab 8005418: JSR 292: virtual dispatch bug in 292 impl
twisti
parents: 15113
diff changeset
   971
        log()->elem("missed_CHA_opportunity klass='%d' method='%d'",
1a1a6d1dfaab 8005418: JSR 292: virtual dispatch bug in 292 impl
twisti
parents: 15113
diff changeset
   972
                       log()->identify(klass),
1a1a6d1dfaab 8005418: JSR 292: virtual dispatch bug in 292 impl
twisti
parents: 15113
diff changeset
   973
                       log()->identify(cha_monomorphic_target));
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   974
      }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   975
      cha_monomorphic_target = NULL;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   976
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   977
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   978
  if (cha_monomorphic_target != NULL) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   979
    // Hardwiring a virtual.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   980
    // If we inlined because CHA revealed only a single target method,
489c9b5090e2 Initial load
duke
parents:
diff changeset
   981
    // then we are dependent on that target method not getting overridden
489c9b5090e2 Initial load
duke
parents:
diff changeset
   982
    // by dynamic class loading.  Be sure to test the "static" receiver
489c9b5090e2 Initial load
duke
parents:
diff changeset
   983
    // dest_method here, as opposed to the actual receiver, which may
489c9b5090e2 Initial load
duke
parents:
diff changeset
   984
    // falsely lead us to believe that the receiver is final or private.
15118
1a1a6d1dfaab 8005418: JSR 292: virtual dispatch bug in 292 impl
twisti
parents: 15113
diff changeset
   985
    dependencies()->assert_unique_concrete_method(actual_receiver, cha_monomorphic_target);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   986
    return cha_monomorphic_target;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   987
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   988
489c9b5090e2 Initial load
duke
parents:
diff changeset
   989
  // If the type is exact, we can still bind the method w/o a vcall.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   990
  // (This case comes after CHA so we can see how much extra work it does.)
489c9b5090e2 Initial load
duke
parents:
diff changeset
   991
  if (actual_receiver_is_exact) {
489c9b5090e2 Initial load
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parents:
diff changeset
   992
    // In case of evolution, there is a dependence on every inlined method, since each
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parents:
diff changeset
   993
    // such method can be changed when its class is redefined.
15118
1a1a6d1dfaab 8005418: JSR 292: virtual dispatch bug in 292 impl
twisti
parents: 15113
diff changeset
   994
    ciMethod* exact_method = callee->resolve_invoke(calling_klass, actual_receiver);
1
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duke
parents:
diff changeset
   995
    if (exact_method != NULL) {
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parents:
diff changeset
   996
#ifndef PRODUCT
489c9b5090e2 Initial load
duke
parents:
diff changeset
   997
      if (PrintOpto) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   998
        tty->print("  Calling method via exact type @%d --- ", bci);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   999
        exact_method->print_name();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1000
        tty->cr();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1001
      }
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parents:
diff changeset
  1002
#endif
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1003
      return exact_method;
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duke
parents:
diff changeset
  1004
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1005
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1006
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1007
  return NULL;
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duke
parents:
diff changeset
  1008
}