69f9ddee90
Use zero based compressed oops if java heap is below 32gb and unscaled compressed oops if java heap is below 4gb. Reviewed-by: never, twisti, jcoomes, coleenp
2696 lines
96 KiB
C++
2696 lines
96 KiB
C++
/*
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* Copyright 1997-2009 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
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* CA 95054 USA or visit www.sun.com if you need additional information or
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* have any questions.
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*
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*/
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#include "incls/_precompiled.incl"
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#include "incls/_compile.cpp.incl"
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/// Support for intrinsics.
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// Return the index at which m must be inserted (or already exists).
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// The sort order is by the address of the ciMethod, with is_virtual as minor key.
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int Compile::intrinsic_insertion_index(ciMethod* m, bool is_virtual) {
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#ifdef ASSERT
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for (int i = 1; i < _intrinsics->length(); i++) {
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CallGenerator* cg1 = _intrinsics->at(i-1);
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CallGenerator* cg2 = _intrinsics->at(i);
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assert(cg1->method() != cg2->method()
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? cg1->method() < cg2->method()
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: cg1->is_virtual() < cg2->is_virtual(),
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"compiler intrinsics list must stay sorted");
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}
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#endif
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// Binary search sorted list, in decreasing intervals [lo, hi].
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int lo = 0, hi = _intrinsics->length()-1;
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while (lo <= hi) {
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int mid = (uint)(hi + lo) / 2;
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ciMethod* mid_m = _intrinsics->at(mid)->method();
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if (m < mid_m) {
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hi = mid-1;
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} else if (m > mid_m) {
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lo = mid+1;
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} else {
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// look at minor sort key
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bool mid_virt = _intrinsics->at(mid)->is_virtual();
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if (is_virtual < mid_virt) {
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hi = mid-1;
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} else if (is_virtual > mid_virt) {
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lo = mid+1;
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} else {
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return mid; // exact match
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}
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}
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}
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return lo; // inexact match
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}
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void Compile::register_intrinsic(CallGenerator* cg) {
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if (_intrinsics == NULL) {
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_intrinsics = new GrowableArray<CallGenerator*>(60);
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}
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// This code is stolen from ciObjectFactory::insert.
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// Really, GrowableArray should have methods for
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// insert_at, remove_at, and binary_search.
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int len = _intrinsics->length();
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int index = intrinsic_insertion_index(cg->method(), cg->is_virtual());
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if (index == len) {
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_intrinsics->append(cg);
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} else {
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#ifdef ASSERT
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CallGenerator* oldcg = _intrinsics->at(index);
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assert(oldcg->method() != cg->method() || oldcg->is_virtual() != cg->is_virtual(), "don't register twice");
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#endif
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_intrinsics->append(_intrinsics->at(len-1));
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int pos;
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for (pos = len-2; pos >= index; pos--) {
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_intrinsics->at_put(pos+1,_intrinsics->at(pos));
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}
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_intrinsics->at_put(index, cg);
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}
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assert(find_intrinsic(cg->method(), cg->is_virtual()) == cg, "registration worked");
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}
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CallGenerator* Compile::find_intrinsic(ciMethod* m, bool is_virtual) {
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assert(m->is_loaded(), "don't try this on unloaded methods");
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if (_intrinsics != NULL) {
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int index = intrinsic_insertion_index(m, is_virtual);
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if (index < _intrinsics->length()
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&& _intrinsics->at(index)->method() == m
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&& _intrinsics->at(index)->is_virtual() == is_virtual) {
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return _intrinsics->at(index);
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}
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}
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// Lazily create intrinsics for intrinsic IDs well-known in the runtime.
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if (m->intrinsic_id() != vmIntrinsics::_none) {
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CallGenerator* cg = make_vm_intrinsic(m, is_virtual);
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if (cg != NULL) {
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// Save it for next time:
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register_intrinsic(cg);
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return cg;
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} else {
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gather_intrinsic_statistics(m->intrinsic_id(), is_virtual, _intrinsic_disabled);
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}
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}
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return NULL;
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}
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// Compile:: register_library_intrinsics and make_vm_intrinsic are defined
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// in library_call.cpp.
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#ifndef PRODUCT
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// statistics gathering...
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juint Compile::_intrinsic_hist_count[vmIntrinsics::ID_LIMIT] = {0};
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jubyte Compile::_intrinsic_hist_flags[vmIntrinsics::ID_LIMIT] = {0};
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bool Compile::gather_intrinsic_statistics(vmIntrinsics::ID id, bool is_virtual, int flags) {
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assert(id > vmIntrinsics::_none && id < vmIntrinsics::ID_LIMIT, "oob");
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int oflags = _intrinsic_hist_flags[id];
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assert(flags != 0, "what happened?");
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if (is_virtual) {
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flags |= _intrinsic_virtual;
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}
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bool changed = (flags != oflags);
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if ((flags & _intrinsic_worked) != 0) {
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juint count = (_intrinsic_hist_count[id] += 1);
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if (count == 1) {
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changed = true; // first time
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}
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// increment the overall count also:
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_intrinsic_hist_count[vmIntrinsics::_none] += 1;
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}
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if (changed) {
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if (((oflags ^ flags) & _intrinsic_virtual) != 0) {
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// Something changed about the intrinsic's virtuality.
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if ((flags & _intrinsic_virtual) != 0) {
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// This is the first use of this intrinsic as a virtual call.
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if (oflags != 0) {
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// We already saw it as a non-virtual, so note both cases.
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flags |= _intrinsic_both;
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}
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} else if ((oflags & _intrinsic_both) == 0) {
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// This is the first use of this intrinsic as a non-virtual
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flags |= _intrinsic_both;
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}
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}
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_intrinsic_hist_flags[id] = (jubyte) (oflags | flags);
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}
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// update the overall flags also:
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_intrinsic_hist_flags[vmIntrinsics::_none] |= (jubyte) flags;
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return changed;
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}
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static char* format_flags(int flags, char* buf) {
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buf[0] = 0;
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if ((flags & Compile::_intrinsic_worked) != 0) strcat(buf, ",worked");
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if ((flags & Compile::_intrinsic_failed) != 0) strcat(buf, ",failed");
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if ((flags & Compile::_intrinsic_disabled) != 0) strcat(buf, ",disabled");
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if ((flags & Compile::_intrinsic_virtual) != 0) strcat(buf, ",virtual");
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if ((flags & Compile::_intrinsic_both) != 0) strcat(buf, ",nonvirtual");
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if (buf[0] == 0) strcat(buf, ",");
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assert(buf[0] == ',', "must be");
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return &buf[1];
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}
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void Compile::print_intrinsic_statistics() {
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char flagsbuf[100];
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ttyLocker ttyl;
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if (xtty != NULL) xtty->head("statistics type='intrinsic'");
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tty->print_cr("Compiler intrinsic usage:");
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juint total = _intrinsic_hist_count[vmIntrinsics::_none];
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if (total == 0) total = 1; // avoid div0 in case of no successes
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#define PRINT_STAT_LINE(name, c, f) \
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tty->print_cr(" %4d (%4.1f%%) %s (%s)", (int)(c), ((c) * 100.0) / total, name, f);
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for (int index = 1 + (int)vmIntrinsics::_none; index < (int)vmIntrinsics::ID_LIMIT; index++) {
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vmIntrinsics::ID id = (vmIntrinsics::ID) index;
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int flags = _intrinsic_hist_flags[id];
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juint count = _intrinsic_hist_count[id];
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if ((flags | count) != 0) {
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PRINT_STAT_LINE(vmIntrinsics::name_at(id), count, format_flags(flags, flagsbuf));
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}
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}
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PRINT_STAT_LINE("total", total, format_flags(_intrinsic_hist_flags[vmIntrinsics::_none], flagsbuf));
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if (xtty != NULL) xtty->tail("statistics");
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}
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void Compile::print_statistics() {
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{ ttyLocker ttyl;
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if (xtty != NULL) xtty->head("statistics type='opto'");
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Parse::print_statistics();
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PhaseCCP::print_statistics();
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PhaseRegAlloc::print_statistics();
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Scheduling::print_statistics();
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PhasePeephole::print_statistics();
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PhaseIdealLoop::print_statistics();
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if (xtty != NULL) xtty->tail("statistics");
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}
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if (_intrinsic_hist_flags[vmIntrinsics::_none] != 0) {
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// put this under its own <statistics> element.
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print_intrinsic_statistics();
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}
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}
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#endif //PRODUCT
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// Support for bundling info
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Bundle* Compile::node_bundling(const Node *n) {
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assert(valid_bundle_info(n), "oob");
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return &_node_bundling_base[n->_idx];
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}
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bool Compile::valid_bundle_info(const Node *n) {
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return (_node_bundling_limit > n->_idx);
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}
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// Identify all nodes that are reachable from below, useful.
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// Use breadth-first pass that records state in a Unique_Node_List,
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// recursive traversal is slower.
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void Compile::identify_useful_nodes(Unique_Node_List &useful) {
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int estimated_worklist_size = unique();
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useful.map( estimated_worklist_size, NULL ); // preallocate space
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// Initialize worklist
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if (root() != NULL) { useful.push(root()); }
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// If 'top' is cached, declare it useful to preserve cached node
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if( cached_top_node() ) { useful.push(cached_top_node()); }
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// Push all useful nodes onto the list, breadthfirst
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for( uint next = 0; next < useful.size(); ++next ) {
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assert( next < unique(), "Unique useful nodes < total nodes");
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Node *n = useful.at(next);
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uint max = n->len();
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for( uint i = 0; i < max; ++i ) {
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Node *m = n->in(i);
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if( m == NULL ) continue;
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useful.push(m);
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}
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}
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}
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// Disconnect all useless nodes by disconnecting those at the boundary.
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void Compile::remove_useless_nodes(Unique_Node_List &useful) {
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uint next = 0;
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while( next < useful.size() ) {
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Node *n = useful.at(next++);
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// Use raw traversal of out edges since this code removes out edges
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int max = n->outcnt();
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for (int j = 0; j < max; ++j ) {
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Node* child = n->raw_out(j);
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if( ! useful.member(child) ) {
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assert( !child->is_top() || child != top(),
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"If top is cached in Compile object it is in useful list");
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// Only need to remove this out-edge to the useless node
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n->raw_del_out(j);
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--j;
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--max;
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}
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}
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if (n->outcnt() == 1 && n->has_special_unique_user()) {
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record_for_igvn( n->unique_out() );
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}
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}
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debug_only(verify_graph_edges(true/*check for no_dead_code*/);)
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}
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//------------------------------frame_size_in_words-----------------------------
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// frame_slots in units of words
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int Compile::frame_size_in_words() const {
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// shift is 0 in LP32 and 1 in LP64
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const int shift = (LogBytesPerWord - LogBytesPerInt);
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int words = _frame_slots >> shift;
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assert( words << shift == _frame_slots, "frame size must be properly aligned in LP64" );
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return words;
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}
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// ============================================================================
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//------------------------------CompileWrapper---------------------------------
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class CompileWrapper : public StackObj {
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Compile *const _compile;
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public:
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CompileWrapper(Compile* compile);
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~CompileWrapper();
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};
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CompileWrapper::CompileWrapper(Compile* compile) : _compile(compile) {
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// the Compile* pointer is stored in the current ciEnv:
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ciEnv* env = compile->env();
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assert(env == ciEnv::current(), "must already be a ciEnv active");
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assert(env->compiler_data() == NULL, "compile already active?");
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env->set_compiler_data(compile);
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assert(compile == Compile::current(), "sanity");
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compile->set_type_dict(NULL);
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compile->set_type_hwm(NULL);
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compile->set_type_last_size(0);
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compile->set_last_tf(NULL, NULL);
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compile->set_indexSet_arena(NULL);
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compile->set_indexSet_free_block_list(NULL);
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compile->init_type_arena();
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Type::Initialize(compile);
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_compile->set_scratch_buffer_blob(NULL);
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_compile->begin_method();
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}
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CompileWrapper::~CompileWrapper() {
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_compile->end_method();
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if (_compile->scratch_buffer_blob() != NULL)
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BufferBlob::free(_compile->scratch_buffer_blob());
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_compile->env()->set_compiler_data(NULL);
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}
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//----------------------------print_compile_messages---------------------------
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void Compile::print_compile_messages() {
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#ifndef PRODUCT
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// Check if recompiling
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if (_subsume_loads == false && PrintOpto) {
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// Recompiling without allowing machine instructions to subsume loads
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tty->print_cr("*********************************************************");
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tty->print_cr("** Bailout: Recompile without subsuming loads **");
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tty->print_cr("*********************************************************");
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}
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if (_do_escape_analysis != DoEscapeAnalysis && PrintOpto) {
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// Recompiling without escape analysis
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tty->print_cr("*********************************************************");
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tty->print_cr("** Bailout: Recompile without escape analysis **");
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tty->print_cr("*********************************************************");
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}
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if (env()->break_at_compile()) {
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// Open the debugger when compiling this method.
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tty->print("### Breaking when compiling: ");
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method()->print_short_name();
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tty->cr();
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BREAKPOINT;
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}
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if( PrintOpto ) {
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if (is_osr_compilation()) {
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tty->print("[OSR]%3d", _compile_id);
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} else {
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tty->print("%3d", _compile_id);
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}
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}
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#endif
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}
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void Compile::init_scratch_buffer_blob() {
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if( scratch_buffer_blob() != NULL ) return;
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// Construct a temporary CodeBuffer to have it construct a BufferBlob
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// Cache this BufferBlob for this compile.
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ResourceMark rm;
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int size = (MAX_inst_size + MAX_stubs_size + MAX_const_size);
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BufferBlob* blob = BufferBlob::create("Compile::scratch_buffer", size);
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// Record the buffer blob for next time.
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set_scratch_buffer_blob(blob);
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// Have we run out of code space?
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if (scratch_buffer_blob() == NULL) {
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// Let CompilerBroker disable further compilations.
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record_failure("Not enough space for scratch buffer in CodeCache");
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return;
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}
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// Initialize the relocation buffers
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relocInfo* locs_buf = (relocInfo*) blob->instructions_end() - MAX_locs_size;
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set_scratch_locs_memory(locs_buf);
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}
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//-----------------------scratch_emit_size-------------------------------------
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// Helper function that computes size by emitting code
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uint Compile::scratch_emit_size(const Node* n) {
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// Emit into a trash buffer and count bytes emitted.
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// This is a pretty expensive way to compute a size,
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// but it works well enough if seldom used.
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// All common fixed-size instructions are given a size
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// method by the AD file.
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// Note that the scratch buffer blob and locs memory are
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// allocated at the beginning of the compile task, and
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// may be shared by several calls to scratch_emit_size.
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// The allocation of the scratch buffer blob is particularly
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// expensive, since it has to grab the code cache lock.
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BufferBlob* blob = this->scratch_buffer_blob();
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assert(blob != NULL, "Initialize BufferBlob at start");
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assert(blob->size() > MAX_inst_size, "sanity");
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relocInfo* locs_buf = scratch_locs_memory();
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address blob_begin = blob->instructions_begin();
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address blob_end = (address)locs_buf;
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assert(blob->instructions_contains(blob_end), "sanity");
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CodeBuffer buf(blob_begin, blob_end - blob_begin);
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buf.initialize_consts_size(MAX_const_size);
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buf.initialize_stubs_size(MAX_stubs_size);
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assert(locs_buf != NULL, "sanity");
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int lsize = MAX_locs_size / 2;
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buf.insts()->initialize_shared_locs(&locs_buf[0], lsize);
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buf.stubs()->initialize_shared_locs(&locs_buf[lsize], lsize);
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n->emit(buf, this->regalloc());
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return buf.code_size();
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}
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// ============================================================================
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//------------------------------Compile standard-------------------------------
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debug_only( int Compile::_debug_idx = 100000; )
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// Compile a method. entry_bci is -1 for normal compilations and indicates
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// the continuation bci for on stack replacement.
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Compile::Compile( ciEnv* ci_env, C2Compiler* compiler, ciMethod* target, int osr_bci, bool subsume_loads, bool do_escape_analysis )
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: Phase(Compiler),
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_env(ci_env),
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_log(ci_env->log()),
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_compile_id(ci_env->compile_id()),
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_save_argument_registers(false),
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_stub_name(NULL),
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_stub_function(NULL),
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_stub_entry_point(NULL),
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_method(target),
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_entry_bci(osr_bci),
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_initial_gvn(NULL),
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_for_igvn(NULL),
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_warm_calls(NULL),
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_subsume_loads(subsume_loads),
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_do_escape_analysis(do_escape_analysis),
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_failure_reason(NULL),
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_code_buffer("Compile::Fill_buffer"),
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_orig_pc_slot(0),
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_orig_pc_slot_offset_in_bytes(0),
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_node_bundling_limit(0),
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_node_bundling_base(NULL),
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#ifndef PRODUCT
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_trace_opto_output(TraceOptoOutput || method()->has_option("TraceOptoOutput")),
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_printer(IdealGraphPrinter::printer()),
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#endif
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_congraph(NULL) {
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C = this;
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CompileWrapper cw(this);
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#ifndef PRODUCT
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if (TimeCompiler2) {
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tty->print(" ");
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target->holder()->name()->print();
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tty->print(".");
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target->print_short_name();
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tty->print(" ");
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}
|
|
TraceTime t1("Total compilation time", &_t_totalCompilation, TimeCompiler, TimeCompiler2);
|
|
TraceTime t2(NULL, &_t_methodCompilation, TimeCompiler, false);
|
|
bool print_opto_assembly = PrintOptoAssembly || _method->has_option("PrintOptoAssembly");
|
|
if (!print_opto_assembly) {
|
|
bool print_assembly = (PrintAssembly || _method->should_print_assembly());
|
|
if (print_assembly && !Disassembler::can_decode()) {
|
|
tty->print_cr("PrintAssembly request changed to PrintOptoAssembly");
|
|
print_opto_assembly = true;
|
|
}
|
|
}
|
|
set_print_assembly(print_opto_assembly);
|
|
set_parsed_irreducible_loop(false);
|
|
#endif
|
|
|
|
if (ProfileTraps) {
|
|
// Make sure the method being compiled gets its own MDO,
|
|
// so we can at least track the decompile_count().
|
|
method()->build_method_data();
|
|
}
|
|
|
|
Init(::AliasLevel);
|
|
|
|
|
|
print_compile_messages();
|
|
|
|
if (UseOldInlining || PrintCompilation NOT_PRODUCT( || PrintOpto) )
|
|
_ilt = InlineTree::build_inline_tree_root();
|
|
else
|
|
_ilt = NULL;
|
|
|
|
// Even if NO memory addresses are used, MergeMem nodes must have at least 1 slice
|
|
assert(num_alias_types() >= AliasIdxRaw, "");
|
|
|
|
#define MINIMUM_NODE_HASH 1023
|
|
// Node list that Iterative GVN will start with
|
|
Unique_Node_List for_igvn(comp_arena());
|
|
set_for_igvn(&for_igvn);
|
|
|
|
// GVN that will be run immediately on new nodes
|
|
uint estimated_size = method()->code_size()*4+64;
|
|
estimated_size = (estimated_size < MINIMUM_NODE_HASH ? MINIMUM_NODE_HASH : estimated_size);
|
|
PhaseGVN gvn(node_arena(), estimated_size);
|
|
set_initial_gvn(&gvn);
|
|
|
|
{ // Scope for timing the parser
|
|
TracePhase t3("parse", &_t_parser, true);
|
|
|
|
// Put top into the hash table ASAP.
|
|
initial_gvn()->transform_no_reclaim(top());
|
|
|
|
// Set up tf(), start(), and find a CallGenerator.
|
|
CallGenerator* cg;
|
|
if (is_osr_compilation()) {
|
|
const TypeTuple *domain = StartOSRNode::osr_domain();
|
|
const TypeTuple *range = TypeTuple::make_range(method()->signature());
|
|
init_tf(TypeFunc::make(domain, range));
|
|
StartNode* s = new (this, 2) StartOSRNode(root(), domain);
|
|
initial_gvn()->set_type_bottom(s);
|
|
init_start(s);
|
|
cg = CallGenerator::for_osr(method(), entry_bci());
|
|
} else {
|
|
// Normal case.
|
|
init_tf(TypeFunc::make(method()));
|
|
StartNode* s = new (this, 2) StartNode(root(), tf()->domain());
|
|
initial_gvn()->set_type_bottom(s);
|
|
init_start(s);
|
|
float past_uses = method()->interpreter_invocation_count();
|
|
float expected_uses = past_uses;
|
|
cg = CallGenerator::for_inline(method(), expected_uses);
|
|
}
|
|
if (failing()) return;
|
|
if (cg == NULL) {
|
|
record_method_not_compilable_all_tiers("cannot parse method");
|
|
return;
|
|
}
|
|
JVMState* jvms = build_start_state(start(), tf());
|
|
if ((jvms = cg->generate(jvms)) == NULL) {
|
|
record_method_not_compilable("method parse failed");
|
|
return;
|
|
}
|
|
GraphKit kit(jvms);
|
|
|
|
if (!kit.stopped()) {
|
|
// Accept return values, and transfer control we know not where.
|
|
// This is done by a special, unique ReturnNode bound to root.
|
|
return_values(kit.jvms());
|
|
}
|
|
|
|
if (kit.has_exceptions()) {
|
|
// Any exceptions that escape from this call must be rethrown
|
|
// to whatever caller is dynamically above us on the stack.
|
|
// This is done by a special, unique RethrowNode bound to root.
|
|
rethrow_exceptions(kit.transfer_exceptions_into_jvms());
|
|
}
|
|
|
|
print_method("Before RemoveUseless", 3);
|
|
|
|
// Remove clutter produced by parsing.
|
|
if (!failing()) {
|
|
ResourceMark rm;
|
|
PhaseRemoveUseless pru(initial_gvn(), &for_igvn);
|
|
}
|
|
}
|
|
|
|
// Note: Large methods are capped off in do_one_bytecode().
|
|
if (failing()) return;
|
|
|
|
// After parsing, node notes are no longer automagic.
|
|
// They must be propagated by register_new_node_with_optimizer(),
|
|
// clone(), or the like.
|
|
set_default_node_notes(NULL);
|
|
|
|
for (;;) {
|
|
int successes = Inline_Warm();
|
|
if (failing()) return;
|
|
if (successes == 0) break;
|
|
}
|
|
|
|
// Drain the list.
|
|
Finish_Warm();
|
|
#ifndef PRODUCT
|
|
if (_printer) {
|
|
_printer->print_inlining(this);
|
|
}
|
|
#endif
|
|
|
|
if (failing()) return;
|
|
NOT_PRODUCT( verify_graph_edges(); )
|
|
|
|
// Perform escape analysis
|
|
if (_do_escape_analysis && ConnectionGraph::has_candidates(this)) {
|
|
TracePhase t2("escapeAnalysis", &_t_escapeAnalysis, true);
|
|
// Add ConP#NULL and ConN#NULL nodes before ConnectionGraph construction.
|
|
PhaseGVN* igvn = initial_gvn();
|
|
Node* oop_null = igvn->zerocon(T_OBJECT);
|
|
Node* noop_null = igvn->zerocon(T_NARROWOOP);
|
|
|
|
_congraph = new(comp_arena()) ConnectionGraph(this);
|
|
bool has_non_escaping_obj = _congraph->compute_escape();
|
|
|
|
#ifndef PRODUCT
|
|
if (PrintEscapeAnalysis) {
|
|
_congraph->dump();
|
|
}
|
|
#endif
|
|
// Cleanup.
|
|
if (oop_null->outcnt() == 0)
|
|
igvn->hash_delete(oop_null);
|
|
if (noop_null->outcnt() == 0)
|
|
igvn->hash_delete(noop_null);
|
|
|
|
if (!has_non_escaping_obj) {
|
|
_congraph = NULL;
|
|
}
|
|
|
|
if (failing()) return;
|
|
}
|
|
// Now optimize
|
|
Optimize();
|
|
if (failing()) return;
|
|
NOT_PRODUCT( verify_graph_edges(); )
|
|
|
|
#ifndef PRODUCT
|
|
if (PrintIdeal) {
|
|
ttyLocker ttyl; // keep the following output all in one block
|
|
// This output goes directly to the tty, not the compiler log.
|
|
// To enable tools to match it up with the compilation activity,
|
|
// be sure to tag this tty output with the compile ID.
|
|
if (xtty != NULL) {
|
|
xtty->head("ideal compile_id='%d'%s", compile_id(),
|
|
is_osr_compilation() ? " compile_kind='osr'" :
|
|
"");
|
|
}
|
|
root()->dump(9999);
|
|
if (xtty != NULL) {
|
|
xtty->tail("ideal");
|
|
}
|
|
}
|
|
#endif
|
|
|
|
// Now that we know the size of all the monitors we can add a fixed slot
|
|
// for the original deopt pc.
|
|
|
|
_orig_pc_slot = fixed_slots();
|
|
int next_slot = _orig_pc_slot + (sizeof(address) / VMRegImpl::stack_slot_size);
|
|
set_fixed_slots(next_slot);
|
|
|
|
// Now generate code
|
|
Code_Gen();
|
|
if (failing()) return;
|
|
|
|
// Check if we want to skip execution of all compiled code.
|
|
{
|
|
#ifndef PRODUCT
|
|
if (OptoNoExecute) {
|
|
record_method_not_compilable("+OptoNoExecute"); // Flag as failed
|
|
return;
|
|
}
|
|
TracePhase t2("install_code", &_t_registerMethod, TimeCompiler);
|
|
#endif
|
|
|
|
if (is_osr_compilation()) {
|
|
_code_offsets.set_value(CodeOffsets::Verified_Entry, 0);
|
|
_code_offsets.set_value(CodeOffsets::OSR_Entry, _first_block_size);
|
|
} else {
|
|
_code_offsets.set_value(CodeOffsets::Verified_Entry, _first_block_size);
|
|
_code_offsets.set_value(CodeOffsets::OSR_Entry, 0);
|
|
}
|
|
|
|
env()->register_method(_method, _entry_bci,
|
|
&_code_offsets,
|
|
_orig_pc_slot_offset_in_bytes,
|
|
code_buffer(),
|
|
frame_size_in_words(), _oop_map_set,
|
|
&_handler_table, &_inc_table,
|
|
compiler,
|
|
env()->comp_level(),
|
|
true, /*has_debug_info*/
|
|
has_unsafe_access()
|
|
);
|
|
}
|
|
}
|
|
|
|
//------------------------------Compile----------------------------------------
|
|
// Compile a runtime stub
|
|
Compile::Compile( ciEnv* ci_env,
|
|
TypeFunc_generator generator,
|
|
address stub_function,
|
|
const char *stub_name,
|
|
int is_fancy_jump,
|
|
bool pass_tls,
|
|
bool save_arg_registers,
|
|
bool return_pc )
|
|
: Phase(Compiler),
|
|
_env(ci_env),
|
|
_log(ci_env->log()),
|
|
_compile_id(-1),
|
|
_save_argument_registers(save_arg_registers),
|
|
_method(NULL),
|
|
_stub_name(stub_name),
|
|
_stub_function(stub_function),
|
|
_stub_entry_point(NULL),
|
|
_entry_bci(InvocationEntryBci),
|
|
_initial_gvn(NULL),
|
|
_for_igvn(NULL),
|
|
_warm_calls(NULL),
|
|
_orig_pc_slot(0),
|
|
_orig_pc_slot_offset_in_bytes(0),
|
|
_subsume_loads(true),
|
|
_do_escape_analysis(false),
|
|
_failure_reason(NULL),
|
|
_code_buffer("Compile::Fill_buffer"),
|
|
_node_bundling_limit(0),
|
|
_node_bundling_base(NULL),
|
|
#ifndef PRODUCT
|
|
_trace_opto_output(TraceOptoOutput),
|
|
_printer(NULL),
|
|
#endif
|
|
_congraph(NULL) {
|
|
C = this;
|
|
|
|
#ifndef PRODUCT
|
|
TraceTime t1(NULL, &_t_totalCompilation, TimeCompiler, false);
|
|
TraceTime t2(NULL, &_t_stubCompilation, TimeCompiler, false);
|
|
set_print_assembly(PrintFrameConverterAssembly);
|
|
set_parsed_irreducible_loop(false);
|
|
#endif
|
|
CompileWrapper cw(this);
|
|
Init(/*AliasLevel=*/ 0);
|
|
init_tf((*generator)());
|
|
|
|
{
|
|
// The following is a dummy for the sake of GraphKit::gen_stub
|
|
Unique_Node_List for_igvn(comp_arena());
|
|
set_for_igvn(&for_igvn); // not used, but some GraphKit guys push on this
|
|
PhaseGVN gvn(Thread::current()->resource_area(),255);
|
|
set_initial_gvn(&gvn); // not significant, but GraphKit guys use it pervasively
|
|
gvn.transform_no_reclaim(top());
|
|
|
|
GraphKit kit;
|
|
kit.gen_stub(stub_function, stub_name, is_fancy_jump, pass_tls, return_pc);
|
|
}
|
|
|
|
NOT_PRODUCT( verify_graph_edges(); )
|
|
Code_Gen();
|
|
if (failing()) return;
|
|
|
|
|
|
// Entry point will be accessed using compile->stub_entry_point();
|
|
if (code_buffer() == NULL) {
|
|
Matcher::soft_match_failure();
|
|
} else {
|
|
if (PrintAssembly && (WizardMode || Verbose))
|
|
tty->print_cr("### Stub::%s", stub_name);
|
|
|
|
if (!failing()) {
|
|
assert(_fixed_slots == 0, "no fixed slots used for runtime stubs");
|
|
|
|
// Make the NMethod
|
|
// For now we mark the frame as never safe for profile stackwalking
|
|
RuntimeStub *rs = RuntimeStub::new_runtime_stub(stub_name,
|
|
code_buffer(),
|
|
CodeOffsets::frame_never_safe,
|
|
// _code_offsets.value(CodeOffsets::Frame_Complete),
|
|
frame_size_in_words(),
|
|
_oop_map_set,
|
|
save_arg_registers);
|
|
assert(rs != NULL && rs->is_runtime_stub(), "sanity check");
|
|
|
|
_stub_entry_point = rs->entry_point();
|
|
}
|
|
}
|
|
}
|
|
|
|
#ifndef PRODUCT
|
|
void print_opto_verbose_signature( const TypeFunc *j_sig, const char *stub_name ) {
|
|
if(PrintOpto && Verbose) {
|
|
tty->print("%s ", stub_name); j_sig->print_flattened(); tty->cr();
|
|
}
|
|
}
|
|
#endif
|
|
|
|
void Compile::print_codes() {
|
|
}
|
|
|
|
//------------------------------Init-------------------------------------------
|
|
// Prepare for a single compilation
|
|
void Compile::Init(int aliaslevel) {
|
|
_unique = 0;
|
|
_regalloc = NULL;
|
|
|
|
_tf = NULL; // filled in later
|
|
_top = NULL; // cached later
|
|
_matcher = NULL; // filled in later
|
|
_cfg = NULL; // filled in later
|
|
|
|
set_24_bit_selection_and_mode(Use24BitFP, false);
|
|
|
|
_node_note_array = NULL;
|
|
_default_node_notes = NULL;
|
|
|
|
_immutable_memory = NULL; // filled in at first inquiry
|
|
|
|
// Globally visible Nodes
|
|
// First set TOP to NULL to give safe behavior during creation of RootNode
|
|
set_cached_top_node(NULL);
|
|
set_root(new (this, 3) RootNode());
|
|
// Now that you have a Root to point to, create the real TOP
|
|
set_cached_top_node( new (this, 1) ConNode(Type::TOP) );
|
|
set_recent_alloc(NULL, NULL);
|
|
|
|
// Create Debug Information Recorder to record scopes, oopmaps, etc.
|
|
env()->set_oop_recorder(new OopRecorder(comp_arena()));
|
|
env()->set_debug_info(new DebugInformationRecorder(env()->oop_recorder()));
|
|
env()->set_dependencies(new Dependencies(env()));
|
|
|
|
_fixed_slots = 0;
|
|
set_has_split_ifs(false);
|
|
set_has_loops(has_method() && method()->has_loops()); // first approximation
|
|
_deopt_happens = true; // start out assuming the worst
|
|
_trap_can_recompile = false; // no traps emitted yet
|
|
_major_progress = true; // start out assuming good things will happen
|
|
set_has_unsafe_access(false);
|
|
Copy::zero_to_bytes(_trap_hist, sizeof(_trap_hist));
|
|
set_decompile_count(0);
|
|
|
|
set_do_freq_based_layout(BlockLayoutByFrequency || method_has_option("BlockLayoutByFrequency"));
|
|
// Compilation level related initialization
|
|
if (env()->comp_level() == CompLevel_fast_compile) {
|
|
set_num_loop_opts(Tier1LoopOptsCount);
|
|
set_do_inlining(Tier1Inline != 0);
|
|
set_max_inline_size(Tier1MaxInlineSize);
|
|
set_freq_inline_size(Tier1FreqInlineSize);
|
|
set_do_scheduling(false);
|
|
set_do_count_invocations(Tier1CountInvocations);
|
|
set_do_method_data_update(Tier1UpdateMethodData);
|
|
} else {
|
|
assert(env()->comp_level() == CompLevel_full_optimization, "unknown comp level");
|
|
set_num_loop_opts(LoopOptsCount);
|
|
set_do_inlining(Inline);
|
|
set_max_inline_size(MaxInlineSize);
|
|
set_freq_inline_size(FreqInlineSize);
|
|
set_do_scheduling(OptoScheduling);
|
|
set_do_count_invocations(false);
|
|
set_do_method_data_update(false);
|
|
}
|
|
|
|
if (debug_info()->recording_non_safepoints()) {
|
|
set_node_note_array(new(comp_arena()) GrowableArray<Node_Notes*>
|
|
(comp_arena(), 8, 0, NULL));
|
|
set_default_node_notes(Node_Notes::make(this));
|
|
}
|
|
|
|
// // -- Initialize types before each compile --
|
|
// // Update cached type information
|
|
// if( _method && _method->constants() )
|
|
// Type::update_loaded_types(_method, _method->constants());
|
|
|
|
// Init alias_type map.
|
|
if (!_do_escape_analysis && aliaslevel == 3)
|
|
aliaslevel = 2; // No unique types without escape analysis
|
|
_AliasLevel = aliaslevel;
|
|
const int grow_ats = 16;
|
|
_max_alias_types = grow_ats;
|
|
_alias_types = NEW_ARENA_ARRAY(comp_arena(), AliasType*, grow_ats);
|
|
AliasType* ats = NEW_ARENA_ARRAY(comp_arena(), AliasType, grow_ats);
|
|
Copy::zero_to_bytes(ats, sizeof(AliasType)*grow_ats);
|
|
{
|
|
for (int i = 0; i < grow_ats; i++) _alias_types[i] = &ats[i];
|
|
}
|
|
// Initialize the first few types.
|
|
_alias_types[AliasIdxTop]->Init(AliasIdxTop, NULL);
|
|
_alias_types[AliasIdxBot]->Init(AliasIdxBot, TypePtr::BOTTOM);
|
|
_alias_types[AliasIdxRaw]->Init(AliasIdxRaw, TypeRawPtr::BOTTOM);
|
|
_num_alias_types = AliasIdxRaw+1;
|
|
// Zero out the alias type cache.
|
|
Copy::zero_to_bytes(_alias_cache, sizeof(_alias_cache));
|
|
// A NULL adr_type hits in the cache right away. Preload the right answer.
|
|
probe_alias_cache(NULL)->_index = AliasIdxTop;
|
|
|
|
_intrinsics = NULL;
|
|
_macro_nodes = new GrowableArray<Node*>(comp_arena(), 8, 0, NULL);
|
|
register_library_intrinsics();
|
|
}
|
|
|
|
//---------------------------init_start----------------------------------------
|
|
// Install the StartNode on this compile object.
|
|
void Compile::init_start(StartNode* s) {
|
|
if (failing())
|
|
return; // already failing
|
|
assert(s == start(), "");
|
|
}
|
|
|
|
StartNode* Compile::start() const {
|
|
assert(!failing(), "");
|
|
for (DUIterator_Fast imax, i = root()->fast_outs(imax); i < imax; i++) {
|
|
Node* start = root()->fast_out(i);
|
|
if( start->is_Start() )
|
|
return start->as_Start();
|
|
}
|
|
ShouldNotReachHere();
|
|
return NULL;
|
|
}
|
|
|
|
//-------------------------------immutable_memory-------------------------------------
|
|
// Access immutable memory
|
|
Node* Compile::immutable_memory() {
|
|
if (_immutable_memory != NULL) {
|
|
return _immutable_memory;
|
|
}
|
|
StartNode* s = start();
|
|
for (DUIterator_Fast imax, i = s->fast_outs(imax); true; i++) {
|
|
Node *p = s->fast_out(i);
|
|
if (p != s && p->as_Proj()->_con == TypeFunc::Memory) {
|
|
_immutable_memory = p;
|
|
return _immutable_memory;
|
|
}
|
|
}
|
|
ShouldNotReachHere();
|
|
return NULL;
|
|
}
|
|
|
|
//----------------------set_cached_top_node------------------------------------
|
|
// Install the cached top node, and make sure Node::is_top works correctly.
|
|
void Compile::set_cached_top_node(Node* tn) {
|
|
if (tn != NULL) verify_top(tn);
|
|
Node* old_top = _top;
|
|
_top = tn;
|
|
// Calling Node::setup_is_top allows the nodes the chance to adjust
|
|
// their _out arrays.
|
|
if (_top != NULL) _top->setup_is_top();
|
|
if (old_top != NULL) old_top->setup_is_top();
|
|
assert(_top == NULL || top()->is_top(), "");
|
|
}
|
|
|
|
#ifndef PRODUCT
|
|
void Compile::verify_top(Node* tn) const {
|
|
if (tn != NULL) {
|
|
assert(tn->is_Con(), "top node must be a constant");
|
|
assert(((ConNode*)tn)->type() == Type::TOP, "top node must have correct type");
|
|
assert(tn->in(0) != NULL, "must have live top node");
|
|
}
|
|
}
|
|
#endif
|
|
|
|
|
|
///-------------------Managing Per-Node Debug & Profile Info-------------------
|
|
|
|
void Compile::grow_node_notes(GrowableArray<Node_Notes*>* arr, int grow_by) {
|
|
guarantee(arr != NULL, "");
|
|
int num_blocks = arr->length();
|
|
if (grow_by < num_blocks) grow_by = num_blocks;
|
|
int num_notes = grow_by * _node_notes_block_size;
|
|
Node_Notes* notes = NEW_ARENA_ARRAY(node_arena(), Node_Notes, num_notes);
|
|
Copy::zero_to_bytes(notes, num_notes * sizeof(Node_Notes));
|
|
while (num_notes > 0) {
|
|
arr->append(notes);
|
|
notes += _node_notes_block_size;
|
|
num_notes -= _node_notes_block_size;
|
|
}
|
|
assert(num_notes == 0, "exact multiple, please");
|
|
}
|
|
|
|
bool Compile::copy_node_notes_to(Node* dest, Node* source) {
|
|
if (source == NULL || dest == NULL) return false;
|
|
|
|
if (dest->is_Con())
|
|
return false; // Do not push debug info onto constants.
|
|
|
|
#ifdef ASSERT
|
|
// Leave a bread crumb trail pointing to the original node:
|
|
if (dest != NULL && dest != source && dest->debug_orig() == NULL) {
|
|
dest->set_debug_orig(source);
|
|
}
|
|
#endif
|
|
|
|
if (node_note_array() == NULL)
|
|
return false; // Not collecting any notes now.
|
|
|
|
// This is a copy onto a pre-existing node, which may already have notes.
|
|
// If both nodes have notes, do not overwrite any pre-existing notes.
|
|
Node_Notes* source_notes = node_notes_at(source->_idx);
|
|
if (source_notes == NULL || source_notes->is_clear()) return false;
|
|
Node_Notes* dest_notes = node_notes_at(dest->_idx);
|
|
if (dest_notes == NULL || dest_notes->is_clear()) {
|
|
return set_node_notes_at(dest->_idx, source_notes);
|
|
}
|
|
|
|
Node_Notes merged_notes = (*source_notes);
|
|
// The order of operations here ensures that dest notes will win...
|
|
merged_notes.update_from(dest_notes);
|
|
return set_node_notes_at(dest->_idx, &merged_notes);
|
|
}
|
|
|
|
|
|
//--------------------------allow_range_check_smearing-------------------------
|
|
// Gating condition for coalescing similar range checks.
|
|
// Sometimes we try 'speculatively' replacing a series of a range checks by a
|
|
// single covering check that is at least as strong as any of them.
|
|
// If the optimization succeeds, the simplified (strengthened) range check
|
|
// will always succeed. If it fails, we will deopt, and then give up
|
|
// on the optimization.
|
|
bool Compile::allow_range_check_smearing() const {
|
|
// If this method has already thrown a range-check,
|
|
// assume it was because we already tried range smearing
|
|
// and it failed.
|
|
uint already_trapped = trap_count(Deoptimization::Reason_range_check);
|
|
return !already_trapped;
|
|
}
|
|
|
|
|
|
//------------------------------flatten_alias_type-----------------------------
|
|
const TypePtr *Compile::flatten_alias_type( const TypePtr *tj ) const {
|
|
int offset = tj->offset();
|
|
TypePtr::PTR ptr = tj->ptr();
|
|
|
|
// Known instance (scalarizable allocation) alias only with itself.
|
|
bool is_known_inst = tj->isa_oopptr() != NULL &&
|
|
tj->is_oopptr()->is_known_instance();
|
|
|
|
// Process weird unsafe references.
|
|
if (offset == Type::OffsetBot && (tj->isa_instptr() /*|| tj->isa_klassptr()*/)) {
|
|
assert(InlineUnsafeOps, "indeterminate pointers come only from unsafe ops");
|
|
assert(!is_known_inst, "scalarizable allocation should not have unsafe references");
|
|
tj = TypeOopPtr::BOTTOM;
|
|
ptr = tj->ptr();
|
|
offset = tj->offset();
|
|
}
|
|
|
|
// Array pointers need some flattening
|
|
const TypeAryPtr *ta = tj->isa_aryptr();
|
|
if( ta && is_known_inst ) {
|
|
if ( offset != Type::OffsetBot &&
|
|
offset > arrayOopDesc::length_offset_in_bytes() ) {
|
|
offset = Type::OffsetBot; // Flatten constant access into array body only
|
|
tj = ta = TypeAryPtr::make(ptr, ta->ary(), ta->klass(), true, offset, ta->instance_id());
|
|
}
|
|
} else if( ta && _AliasLevel >= 2 ) {
|
|
// For arrays indexed by constant indices, we flatten the alias
|
|
// space to include all of the array body. Only the header, klass
|
|
// and array length can be accessed un-aliased.
|
|
if( offset != Type::OffsetBot ) {
|
|
if( ta->const_oop() ) { // methodDataOop or methodOop
|
|
offset = Type::OffsetBot; // Flatten constant access into array body
|
|
tj = ta = TypeAryPtr::make(ptr,ta->const_oop(),ta->ary(),ta->klass(),false,offset);
|
|
} else if( offset == arrayOopDesc::length_offset_in_bytes() ) {
|
|
// range is OK as-is.
|
|
tj = ta = TypeAryPtr::RANGE;
|
|
} else if( offset == oopDesc::klass_offset_in_bytes() ) {
|
|
tj = TypeInstPtr::KLASS; // all klass loads look alike
|
|
ta = TypeAryPtr::RANGE; // generic ignored junk
|
|
ptr = TypePtr::BotPTR;
|
|
} else if( offset == oopDesc::mark_offset_in_bytes() ) {
|
|
tj = TypeInstPtr::MARK;
|
|
ta = TypeAryPtr::RANGE; // generic ignored junk
|
|
ptr = TypePtr::BotPTR;
|
|
} else { // Random constant offset into array body
|
|
offset = Type::OffsetBot; // Flatten constant access into array body
|
|
tj = ta = TypeAryPtr::make(ptr,ta->ary(),ta->klass(),false,offset);
|
|
}
|
|
}
|
|
// Arrays of fixed size alias with arrays of unknown size.
|
|
if (ta->size() != TypeInt::POS) {
|
|
const TypeAry *tary = TypeAry::make(ta->elem(), TypeInt::POS);
|
|
tj = ta = TypeAryPtr::make(ptr,ta->const_oop(),tary,ta->klass(),false,offset);
|
|
}
|
|
// Arrays of known objects become arrays of unknown objects.
|
|
if (ta->elem()->isa_narrowoop() && ta->elem() != TypeNarrowOop::BOTTOM) {
|
|
const TypeAry *tary = TypeAry::make(TypeNarrowOop::BOTTOM, ta->size());
|
|
tj = ta = TypeAryPtr::make(ptr,ta->const_oop(),tary,NULL,false,offset);
|
|
}
|
|
if (ta->elem()->isa_oopptr() && ta->elem() != TypeInstPtr::BOTTOM) {
|
|
const TypeAry *tary = TypeAry::make(TypeInstPtr::BOTTOM, ta->size());
|
|
tj = ta = TypeAryPtr::make(ptr,ta->const_oop(),tary,NULL,false,offset);
|
|
}
|
|
// Arrays of bytes and of booleans both use 'bastore' and 'baload' so
|
|
// cannot be distinguished by bytecode alone.
|
|
if (ta->elem() == TypeInt::BOOL) {
|
|
const TypeAry *tary = TypeAry::make(TypeInt::BYTE, ta->size());
|
|
ciKlass* aklass = ciTypeArrayKlass::make(T_BYTE);
|
|
tj = ta = TypeAryPtr::make(ptr,ta->const_oop(),tary,aklass,false,offset);
|
|
}
|
|
// During the 2nd round of IterGVN, NotNull castings are removed.
|
|
// Make sure the Bottom and NotNull variants alias the same.
|
|
// Also, make sure exact and non-exact variants alias the same.
|
|
if( ptr == TypePtr::NotNull || ta->klass_is_exact() ) {
|
|
if (ta->const_oop()) {
|
|
tj = ta = TypeAryPtr::make(TypePtr::Constant,ta->const_oop(),ta->ary(),ta->klass(),false,offset);
|
|
} else {
|
|
tj = ta = TypeAryPtr::make(TypePtr::BotPTR,ta->ary(),ta->klass(),false,offset);
|
|
}
|
|
}
|
|
}
|
|
|
|
// Oop pointers need some flattening
|
|
const TypeInstPtr *to = tj->isa_instptr();
|
|
if( to && _AliasLevel >= 2 && to != TypeOopPtr::BOTTOM ) {
|
|
if( ptr == TypePtr::Constant ) {
|
|
// No constant oop pointers (such as Strings); they alias with
|
|
// unknown strings.
|
|
assert(!is_known_inst, "not scalarizable allocation");
|
|
tj = to = TypeInstPtr::make(TypePtr::BotPTR,to->klass(),false,0,offset);
|
|
} else if( is_known_inst ) {
|
|
tj = to; // Keep NotNull and klass_is_exact for instance type
|
|
} else if( ptr == TypePtr::NotNull || to->klass_is_exact() ) {
|
|
// During the 2nd round of IterGVN, NotNull castings are removed.
|
|
// Make sure the Bottom and NotNull variants alias the same.
|
|
// Also, make sure exact and non-exact variants alias the same.
|
|
tj = to = TypeInstPtr::make(TypePtr::BotPTR,to->klass(),false,0,offset);
|
|
}
|
|
// Canonicalize the holder of this field
|
|
ciInstanceKlass *k = to->klass()->as_instance_klass();
|
|
if (offset >= 0 && offset < instanceOopDesc::base_offset_in_bytes()) {
|
|
// First handle header references such as a LoadKlassNode, even if the
|
|
// object's klass is unloaded at compile time (4965979).
|
|
if (!is_known_inst) { // Do it only for non-instance types
|
|
tj = to = TypeInstPtr::make(TypePtr::BotPTR, env()->Object_klass(), false, NULL, offset);
|
|
}
|
|
} else if (offset < 0 || offset >= k->size_helper() * wordSize) {
|
|
to = NULL;
|
|
tj = TypeOopPtr::BOTTOM;
|
|
offset = tj->offset();
|
|
} else {
|
|
ciInstanceKlass *canonical_holder = k->get_canonical_holder(offset);
|
|
if (!k->equals(canonical_holder) || tj->offset() != offset) {
|
|
if( is_known_inst ) {
|
|
tj = to = TypeInstPtr::make(to->ptr(), canonical_holder, true, NULL, offset, to->instance_id());
|
|
} else {
|
|
tj = to = TypeInstPtr::make(to->ptr(), canonical_holder, false, NULL, offset);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
// Klass pointers to object array klasses need some flattening
|
|
const TypeKlassPtr *tk = tj->isa_klassptr();
|
|
if( tk ) {
|
|
// If we are referencing a field within a Klass, we need
|
|
// to assume the worst case of an Object. Both exact and
|
|
// inexact types must flatten to the same alias class.
|
|
// Since the flattened result for a klass is defined to be
|
|
// precisely java.lang.Object, use a constant ptr.
|
|
if ( offset == Type::OffsetBot || (offset >= 0 && (size_t)offset < sizeof(Klass)) ) {
|
|
|
|
tj = tk = TypeKlassPtr::make(TypePtr::Constant,
|
|
TypeKlassPtr::OBJECT->klass(),
|
|
offset);
|
|
}
|
|
|
|
ciKlass* klass = tk->klass();
|
|
if( klass->is_obj_array_klass() ) {
|
|
ciKlass* k = TypeAryPtr::OOPS->klass();
|
|
if( !k || !k->is_loaded() ) // Only fails for some -Xcomp runs
|
|
k = TypeInstPtr::BOTTOM->klass();
|
|
tj = tk = TypeKlassPtr::make( TypePtr::NotNull, k, offset );
|
|
}
|
|
|
|
// Check for precise loads from the primary supertype array and force them
|
|
// to the supertype cache alias index. Check for generic array loads from
|
|
// the primary supertype array and also force them to the supertype cache
|
|
// alias index. Since the same load can reach both, we need to merge
|
|
// these 2 disparate memories into the same alias class. Since the
|
|
// primary supertype array is read-only, there's no chance of confusion
|
|
// where we bypass an array load and an array store.
|
|
uint off2 = offset - Klass::primary_supers_offset_in_bytes();
|
|
if( offset == Type::OffsetBot ||
|
|
off2 < Klass::primary_super_limit()*wordSize ) {
|
|
offset = sizeof(oopDesc) +Klass::secondary_super_cache_offset_in_bytes();
|
|
tj = tk = TypeKlassPtr::make( TypePtr::NotNull, tk->klass(), offset );
|
|
}
|
|
}
|
|
|
|
// Flatten all Raw pointers together.
|
|
if (tj->base() == Type::RawPtr)
|
|
tj = TypeRawPtr::BOTTOM;
|
|
|
|
if (tj->base() == Type::AnyPtr)
|
|
tj = TypePtr::BOTTOM; // An error, which the caller must check for.
|
|
|
|
// Flatten all to bottom for now
|
|
switch( _AliasLevel ) {
|
|
case 0:
|
|
tj = TypePtr::BOTTOM;
|
|
break;
|
|
case 1: // Flatten to: oop, static, field or array
|
|
switch (tj->base()) {
|
|
//case Type::AryPtr: tj = TypeAryPtr::RANGE; break;
|
|
case Type::RawPtr: tj = TypeRawPtr::BOTTOM; break;
|
|
case Type::AryPtr: // do not distinguish arrays at all
|
|
case Type::InstPtr: tj = TypeInstPtr::BOTTOM; break;
|
|
case Type::KlassPtr: tj = TypeKlassPtr::OBJECT; break;
|
|
case Type::AnyPtr: tj = TypePtr::BOTTOM; break; // caller checks it
|
|
default: ShouldNotReachHere();
|
|
}
|
|
break;
|
|
case 2: // No collapsing at level 2; keep all splits
|
|
case 3: // No collapsing at level 3; keep all splits
|
|
break;
|
|
default:
|
|
Unimplemented();
|
|
}
|
|
|
|
offset = tj->offset();
|
|
assert( offset != Type::OffsetTop, "Offset has fallen from constant" );
|
|
|
|
assert( (offset != Type::OffsetBot && tj->base() != Type::AryPtr) ||
|
|
(offset == Type::OffsetBot && tj->base() == Type::AryPtr) ||
|
|
(offset == Type::OffsetBot && tj == TypeOopPtr::BOTTOM) ||
|
|
(offset == Type::OffsetBot && tj == TypePtr::BOTTOM) ||
|
|
(offset == oopDesc::mark_offset_in_bytes() && tj->base() == Type::AryPtr) ||
|
|
(offset == oopDesc::klass_offset_in_bytes() && tj->base() == Type::AryPtr) ||
|
|
(offset == arrayOopDesc::length_offset_in_bytes() && tj->base() == Type::AryPtr) ,
|
|
"For oops, klasses, raw offset must be constant; for arrays the offset is never known" );
|
|
assert( tj->ptr() != TypePtr::TopPTR &&
|
|
tj->ptr() != TypePtr::AnyNull &&
|
|
tj->ptr() != TypePtr::Null, "No imprecise addresses" );
|
|
// assert( tj->ptr() != TypePtr::Constant ||
|
|
// tj->base() == Type::RawPtr ||
|
|
// tj->base() == Type::KlassPtr, "No constant oop addresses" );
|
|
|
|
return tj;
|
|
}
|
|
|
|
void Compile::AliasType::Init(int i, const TypePtr* at) {
|
|
_index = i;
|
|
_adr_type = at;
|
|
_field = NULL;
|
|
_is_rewritable = true; // default
|
|
const TypeOopPtr *atoop = (at != NULL) ? at->isa_oopptr() : NULL;
|
|
if (atoop != NULL && atoop->is_known_instance()) {
|
|
const TypeOopPtr *gt = atoop->cast_to_instance_id(TypeOopPtr::InstanceBot);
|
|
_general_index = Compile::current()->get_alias_index(gt);
|
|
} else {
|
|
_general_index = 0;
|
|
}
|
|
}
|
|
|
|
//---------------------------------print_on------------------------------------
|
|
#ifndef PRODUCT
|
|
void Compile::AliasType::print_on(outputStream* st) {
|
|
if (index() < 10)
|
|
st->print("@ <%d> ", index());
|
|
else st->print("@ <%d>", index());
|
|
st->print(is_rewritable() ? " " : " RO");
|
|
int offset = adr_type()->offset();
|
|
if (offset == Type::OffsetBot)
|
|
st->print(" +any");
|
|
else st->print(" +%-3d", offset);
|
|
st->print(" in ");
|
|
adr_type()->dump_on(st);
|
|
const TypeOopPtr* tjp = adr_type()->isa_oopptr();
|
|
if (field() != NULL && tjp) {
|
|
if (tjp->klass() != field()->holder() ||
|
|
tjp->offset() != field()->offset_in_bytes()) {
|
|
st->print(" != ");
|
|
field()->print();
|
|
st->print(" ***");
|
|
}
|
|
}
|
|
}
|
|
|
|
void print_alias_types() {
|
|
Compile* C = Compile::current();
|
|
tty->print_cr("--- Alias types, AliasIdxBot .. %d", C->num_alias_types()-1);
|
|
for (int idx = Compile::AliasIdxBot; idx < C->num_alias_types(); idx++) {
|
|
C->alias_type(idx)->print_on(tty);
|
|
tty->cr();
|
|
}
|
|
}
|
|
#endif
|
|
|
|
|
|
//----------------------------probe_alias_cache--------------------------------
|
|
Compile::AliasCacheEntry* Compile::probe_alias_cache(const TypePtr* adr_type) {
|
|
intptr_t key = (intptr_t) adr_type;
|
|
key ^= key >> logAliasCacheSize;
|
|
return &_alias_cache[key & right_n_bits(logAliasCacheSize)];
|
|
}
|
|
|
|
|
|
//-----------------------------grow_alias_types--------------------------------
|
|
void Compile::grow_alias_types() {
|
|
const int old_ats = _max_alias_types; // how many before?
|
|
const int new_ats = old_ats; // how many more?
|
|
const int grow_ats = old_ats+new_ats; // how many now?
|
|
_max_alias_types = grow_ats;
|
|
_alias_types = REALLOC_ARENA_ARRAY(comp_arena(), AliasType*, _alias_types, old_ats, grow_ats);
|
|
AliasType* ats = NEW_ARENA_ARRAY(comp_arena(), AliasType, new_ats);
|
|
Copy::zero_to_bytes(ats, sizeof(AliasType)*new_ats);
|
|
for (int i = 0; i < new_ats; i++) _alias_types[old_ats+i] = &ats[i];
|
|
}
|
|
|
|
|
|
//--------------------------------find_alias_type------------------------------
|
|
Compile::AliasType* Compile::find_alias_type(const TypePtr* adr_type, bool no_create) {
|
|
if (_AliasLevel == 0)
|
|
return alias_type(AliasIdxBot);
|
|
|
|
AliasCacheEntry* ace = probe_alias_cache(adr_type);
|
|
if (ace->_adr_type == adr_type) {
|
|
return alias_type(ace->_index);
|
|
}
|
|
|
|
// Handle special cases.
|
|
if (adr_type == NULL) return alias_type(AliasIdxTop);
|
|
if (adr_type == TypePtr::BOTTOM) return alias_type(AliasIdxBot);
|
|
|
|
// Do it the slow way.
|
|
const TypePtr* flat = flatten_alias_type(adr_type);
|
|
|
|
#ifdef ASSERT
|
|
assert(flat == flatten_alias_type(flat), "idempotent");
|
|
assert(flat != TypePtr::BOTTOM, "cannot alias-analyze an untyped ptr");
|
|
if (flat->isa_oopptr() && !flat->isa_klassptr()) {
|
|
const TypeOopPtr* foop = flat->is_oopptr();
|
|
// Scalarizable allocations have exact klass always.
|
|
bool exact = !foop->klass_is_exact() || foop->is_known_instance();
|
|
const TypePtr* xoop = foop->cast_to_exactness(exact)->is_ptr();
|
|
assert(foop == flatten_alias_type(xoop), "exactness must not affect alias type");
|
|
}
|
|
assert(flat == flatten_alias_type(flat), "exact bit doesn't matter");
|
|
#endif
|
|
|
|
int idx = AliasIdxTop;
|
|
for (int i = 0; i < num_alias_types(); i++) {
|
|
if (alias_type(i)->adr_type() == flat) {
|
|
idx = i;
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (idx == AliasIdxTop) {
|
|
if (no_create) return NULL;
|
|
// Grow the array if necessary.
|
|
if (_num_alias_types == _max_alias_types) grow_alias_types();
|
|
// Add a new alias type.
|
|
idx = _num_alias_types++;
|
|
_alias_types[idx]->Init(idx, flat);
|
|
if (flat == TypeInstPtr::KLASS) alias_type(idx)->set_rewritable(false);
|
|
if (flat == TypeAryPtr::RANGE) alias_type(idx)->set_rewritable(false);
|
|
if (flat->isa_instptr()) {
|
|
if (flat->offset() == java_lang_Class::klass_offset_in_bytes()
|
|
&& flat->is_instptr()->klass() == env()->Class_klass())
|
|
alias_type(idx)->set_rewritable(false);
|
|
}
|
|
if (flat->isa_klassptr()) {
|
|
if (flat->offset() == Klass::super_check_offset_offset_in_bytes() + (int)sizeof(oopDesc))
|
|
alias_type(idx)->set_rewritable(false);
|
|
if (flat->offset() == Klass::modifier_flags_offset_in_bytes() + (int)sizeof(oopDesc))
|
|
alias_type(idx)->set_rewritable(false);
|
|
if (flat->offset() == Klass::access_flags_offset_in_bytes() + (int)sizeof(oopDesc))
|
|
alias_type(idx)->set_rewritable(false);
|
|
if (flat->offset() == Klass::java_mirror_offset_in_bytes() + (int)sizeof(oopDesc))
|
|
alias_type(idx)->set_rewritable(false);
|
|
}
|
|
// %%% (We would like to finalize JavaThread::threadObj_offset(),
|
|
// but the base pointer type is not distinctive enough to identify
|
|
// references into JavaThread.)
|
|
|
|
// Check for final instance fields.
|
|
const TypeInstPtr* tinst = flat->isa_instptr();
|
|
if (tinst && tinst->offset() >= instanceOopDesc::base_offset_in_bytes()) {
|
|
ciInstanceKlass *k = tinst->klass()->as_instance_klass();
|
|
ciField* field = k->get_field_by_offset(tinst->offset(), false);
|
|
// Set field() and is_rewritable() attributes.
|
|
if (field != NULL) alias_type(idx)->set_field(field);
|
|
}
|
|
const TypeKlassPtr* tklass = flat->isa_klassptr();
|
|
// Check for final static fields.
|
|
if (tklass && tklass->klass()->is_instance_klass()) {
|
|
ciInstanceKlass *k = tklass->klass()->as_instance_klass();
|
|
ciField* field = k->get_field_by_offset(tklass->offset(), true);
|
|
// Set field() and is_rewritable() attributes.
|
|
if (field != NULL) alias_type(idx)->set_field(field);
|
|
}
|
|
}
|
|
|
|
// Fill the cache for next time.
|
|
ace->_adr_type = adr_type;
|
|
ace->_index = idx;
|
|
assert(alias_type(adr_type) == alias_type(idx), "type must be installed");
|
|
|
|
// Might as well try to fill the cache for the flattened version, too.
|
|
AliasCacheEntry* face = probe_alias_cache(flat);
|
|
if (face->_adr_type == NULL) {
|
|
face->_adr_type = flat;
|
|
face->_index = idx;
|
|
assert(alias_type(flat) == alias_type(idx), "flat type must work too");
|
|
}
|
|
|
|
return alias_type(idx);
|
|
}
|
|
|
|
|
|
Compile::AliasType* Compile::alias_type(ciField* field) {
|
|
const TypeOopPtr* t;
|
|
if (field->is_static())
|
|
t = TypeKlassPtr::make(field->holder());
|
|
else
|
|
t = TypeOopPtr::make_from_klass_raw(field->holder());
|
|
AliasType* atp = alias_type(t->add_offset(field->offset_in_bytes()));
|
|
assert(field->is_final() == !atp->is_rewritable(), "must get the rewritable bits correct");
|
|
return atp;
|
|
}
|
|
|
|
|
|
//------------------------------have_alias_type--------------------------------
|
|
bool Compile::have_alias_type(const TypePtr* adr_type) {
|
|
AliasCacheEntry* ace = probe_alias_cache(adr_type);
|
|
if (ace->_adr_type == adr_type) {
|
|
return true;
|
|
}
|
|
|
|
// Handle special cases.
|
|
if (adr_type == NULL) return true;
|
|
if (adr_type == TypePtr::BOTTOM) return true;
|
|
|
|
return find_alias_type(adr_type, true) != NULL;
|
|
}
|
|
|
|
//-----------------------------must_alias--------------------------------------
|
|
// True if all values of the given address type are in the given alias category.
|
|
bool Compile::must_alias(const TypePtr* adr_type, int alias_idx) {
|
|
if (alias_idx == AliasIdxBot) return true; // the universal category
|
|
if (adr_type == NULL) return true; // NULL serves as TypePtr::TOP
|
|
if (alias_idx == AliasIdxTop) return false; // the empty category
|
|
if (adr_type->base() == Type::AnyPtr) return false; // TypePtr::BOTTOM or its twins
|
|
|
|
// the only remaining possible overlap is identity
|
|
int adr_idx = get_alias_index(adr_type);
|
|
assert(adr_idx != AliasIdxBot && adr_idx != AliasIdxTop, "");
|
|
assert(adr_idx == alias_idx ||
|
|
(alias_type(alias_idx)->adr_type() != TypeOopPtr::BOTTOM
|
|
&& adr_type != TypeOopPtr::BOTTOM),
|
|
"should not be testing for overlap with an unsafe pointer");
|
|
return adr_idx == alias_idx;
|
|
}
|
|
|
|
//------------------------------can_alias--------------------------------------
|
|
// True if any values of the given address type are in the given alias category.
|
|
bool Compile::can_alias(const TypePtr* adr_type, int alias_idx) {
|
|
if (alias_idx == AliasIdxTop) return false; // the empty category
|
|
if (adr_type == NULL) return false; // NULL serves as TypePtr::TOP
|
|
if (alias_idx == AliasIdxBot) return true; // the universal category
|
|
if (adr_type->base() == Type::AnyPtr) return true; // TypePtr::BOTTOM or its twins
|
|
|
|
// the only remaining possible overlap is identity
|
|
int adr_idx = get_alias_index(adr_type);
|
|
assert(adr_idx != AliasIdxBot && adr_idx != AliasIdxTop, "");
|
|
return adr_idx == alias_idx;
|
|
}
|
|
|
|
|
|
|
|
//---------------------------pop_warm_call-------------------------------------
|
|
WarmCallInfo* Compile::pop_warm_call() {
|
|
WarmCallInfo* wci = _warm_calls;
|
|
if (wci != NULL) _warm_calls = wci->remove_from(wci);
|
|
return wci;
|
|
}
|
|
|
|
//----------------------------Inline_Warm--------------------------------------
|
|
int Compile::Inline_Warm() {
|
|
// If there is room, try to inline some more warm call sites.
|
|
// %%% Do a graph index compaction pass when we think we're out of space?
|
|
if (!InlineWarmCalls) return 0;
|
|
|
|
int calls_made_hot = 0;
|
|
int room_to_grow = NodeCountInliningCutoff - unique();
|
|
int amount_to_grow = MIN2(room_to_grow, (int)NodeCountInliningStep);
|
|
int amount_grown = 0;
|
|
WarmCallInfo* call;
|
|
while (amount_to_grow > 0 && (call = pop_warm_call()) != NULL) {
|
|
int est_size = (int)call->size();
|
|
if (est_size > (room_to_grow - amount_grown)) {
|
|
// This one won't fit anyway. Get rid of it.
|
|
call->make_cold();
|
|
continue;
|
|
}
|
|
call->make_hot();
|
|
calls_made_hot++;
|
|
amount_grown += est_size;
|
|
amount_to_grow -= est_size;
|
|
}
|
|
|
|
if (calls_made_hot > 0) set_major_progress();
|
|
return calls_made_hot;
|
|
}
|
|
|
|
|
|
//----------------------------Finish_Warm--------------------------------------
|
|
void Compile::Finish_Warm() {
|
|
if (!InlineWarmCalls) return;
|
|
if (failing()) return;
|
|
if (warm_calls() == NULL) return;
|
|
|
|
// Clean up loose ends, if we are out of space for inlining.
|
|
WarmCallInfo* call;
|
|
while ((call = pop_warm_call()) != NULL) {
|
|
call->make_cold();
|
|
}
|
|
}
|
|
|
|
|
|
//------------------------------Optimize---------------------------------------
|
|
// Given a graph, optimize it.
|
|
void Compile::Optimize() {
|
|
TracePhase t1("optimizer", &_t_optimizer, true);
|
|
|
|
#ifndef PRODUCT
|
|
if (env()->break_at_compile()) {
|
|
BREAKPOINT;
|
|
}
|
|
|
|
#endif
|
|
|
|
ResourceMark rm;
|
|
int loop_opts_cnt;
|
|
|
|
NOT_PRODUCT( verify_graph_edges(); )
|
|
|
|
print_method("After Parsing");
|
|
|
|
{
|
|
// Iterative Global Value Numbering, including ideal transforms
|
|
// Initialize IterGVN with types and values from parse-time GVN
|
|
PhaseIterGVN igvn(initial_gvn());
|
|
{
|
|
NOT_PRODUCT( TracePhase t2("iterGVN", &_t_iterGVN, TimeCompiler); )
|
|
igvn.optimize();
|
|
}
|
|
|
|
print_method("Iter GVN 1", 2);
|
|
|
|
if (failing()) return;
|
|
|
|
// Loop transforms on the ideal graph. Range Check Elimination,
|
|
// peeling, unrolling, etc.
|
|
|
|
// Set loop opts counter
|
|
loop_opts_cnt = num_loop_opts();
|
|
if((loop_opts_cnt > 0) && (has_loops() || has_split_ifs())) {
|
|
{
|
|
TracePhase t2("idealLoop", &_t_idealLoop, true);
|
|
PhaseIdealLoop ideal_loop( igvn, NULL, true );
|
|
loop_opts_cnt--;
|
|
if (major_progress()) print_method("PhaseIdealLoop 1", 2);
|
|
if (failing()) return;
|
|
}
|
|
// Loop opts pass if partial peeling occurred in previous pass
|
|
if(PartialPeelLoop && major_progress() && (loop_opts_cnt > 0)) {
|
|
TracePhase t3("idealLoop", &_t_idealLoop, true);
|
|
PhaseIdealLoop ideal_loop( igvn, NULL, false );
|
|
loop_opts_cnt--;
|
|
if (major_progress()) print_method("PhaseIdealLoop 2", 2);
|
|
if (failing()) return;
|
|
}
|
|
// Loop opts pass for loop-unrolling before CCP
|
|
if(major_progress() && (loop_opts_cnt > 0)) {
|
|
TracePhase t4("idealLoop", &_t_idealLoop, true);
|
|
PhaseIdealLoop ideal_loop( igvn, NULL, false );
|
|
loop_opts_cnt--;
|
|
if (major_progress()) print_method("PhaseIdealLoop 3", 2);
|
|
}
|
|
}
|
|
if (failing()) return;
|
|
|
|
// Conditional Constant Propagation;
|
|
PhaseCCP ccp( &igvn );
|
|
assert( true, "Break here to ccp.dump_nodes_and_types(_root,999,1)");
|
|
{
|
|
TracePhase t2("ccp", &_t_ccp, true);
|
|
ccp.do_transform();
|
|
}
|
|
print_method("PhaseCPP 1", 2);
|
|
|
|
assert( true, "Break here to ccp.dump_old2new_map()");
|
|
|
|
// Iterative Global Value Numbering, including ideal transforms
|
|
{
|
|
NOT_PRODUCT( TracePhase t2("iterGVN2", &_t_iterGVN2, TimeCompiler); )
|
|
igvn = ccp;
|
|
igvn.optimize();
|
|
}
|
|
|
|
print_method("Iter GVN 2", 2);
|
|
|
|
if (failing()) return;
|
|
|
|
// Loop transforms on the ideal graph. Range Check Elimination,
|
|
// peeling, unrolling, etc.
|
|
if(loop_opts_cnt > 0) {
|
|
debug_only( int cnt = 0; );
|
|
while(major_progress() && (loop_opts_cnt > 0)) {
|
|
TracePhase t2("idealLoop", &_t_idealLoop, true);
|
|
assert( cnt++ < 40, "infinite cycle in loop optimization" );
|
|
PhaseIdealLoop ideal_loop( igvn, NULL, true );
|
|
loop_opts_cnt--;
|
|
if (major_progress()) print_method("PhaseIdealLoop iterations", 2);
|
|
if (failing()) return;
|
|
}
|
|
}
|
|
{
|
|
NOT_PRODUCT( TracePhase t2("macroExpand", &_t_macroExpand, TimeCompiler); )
|
|
PhaseMacroExpand mex(igvn);
|
|
if (mex.expand_macro_nodes()) {
|
|
assert(failing(), "must bail out w/ explicit message");
|
|
return;
|
|
}
|
|
}
|
|
|
|
} // (End scope of igvn; run destructor if necessary for asserts.)
|
|
|
|
// A method with only infinite loops has no edges entering loops from root
|
|
{
|
|
NOT_PRODUCT( TracePhase t2("graphReshape", &_t_graphReshaping, TimeCompiler); )
|
|
if (final_graph_reshaping()) {
|
|
assert(failing(), "must bail out w/ explicit message");
|
|
return;
|
|
}
|
|
}
|
|
|
|
print_method("Optimize finished", 2);
|
|
}
|
|
|
|
|
|
//------------------------------Code_Gen---------------------------------------
|
|
// Given a graph, generate code for it
|
|
void Compile::Code_Gen() {
|
|
if (failing()) return;
|
|
|
|
// Perform instruction selection. You might think we could reclaim Matcher
|
|
// memory PDQ, but actually the Matcher is used in generating spill code.
|
|
// Internals of the Matcher (including some VectorSets) must remain live
|
|
// for awhile - thus I cannot reclaim Matcher memory lest a VectorSet usage
|
|
// set a bit in reclaimed memory.
|
|
|
|
// In debug mode can dump m._nodes.dump() for mapping of ideal to machine
|
|
// nodes. Mapping is only valid at the root of each matched subtree.
|
|
NOT_PRODUCT( verify_graph_edges(); )
|
|
|
|
Node_List proj_list;
|
|
Matcher m(proj_list);
|
|
_matcher = &m;
|
|
{
|
|
TracePhase t2("matcher", &_t_matcher, true);
|
|
m.match();
|
|
}
|
|
// In debug mode can dump m._nodes.dump() for mapping of ideal to machine
|
|
// nodes. Mapping is only valid at the root of each matched subtree.
|
|
NOT_PRODUCT( verify_graph_edges(); )
|
|
|
|
// If you have too many nodes, or if matching has failed, bail out
|
|
check_node_count(0, "out of nodes matching instructions");
|
|
if (failing()) return;
|
|
|
|
// Build a proper-looking CFG
|
|
PhaseCFG cfg(node_arena(), root(), m);
|
|
_cfg = &cfg;
|
|
{
|
|
NOT_PRODUCT( TracePhase t2("scheduler", &_t_scheduler, TimeCompiler); )
|
|
cfg.Dominators();
|
|
if (failing()) return;
|
|
|
|
NOT_PRODUCT( verify_graph_edges(); )
|
|
|
|
cfg.Estimate_Block_Frequency();
|
|
cfg.GlobalCodeMotion(m,unique(),proj_list);
|
|
|
|
print_method("Global code motion", 2);
|
|
|
|
if (failing()) return;
|
|
NOT_PRODUCT( verify_graph_edges(); )
|
|
|
|
debug_only( cfg.verify(); )
|
|
}
|
|
NOT_PRODUCT( verify_graph_edges(); )
|
|
|
|
PhaseChaitin regalloc(unique(),cfg,m);
|
|
_regalloc = ®alloc;
|
|
{
|
|
TracePhase t2("regalloc", &_t_registerAllocation, true);
|
|
// Perform any platform dependent preallocation actions. This is used,
|
|
// for example, to avoid taking an implicit null pointer exception
|
|
// using the frame pointer on win95.
|
|
_regalloc->pd_preallocate_hook();
|
|
|
|
// Perform register allocation. After Chaitin, use-def chains are
|
|
// no longer accurate (at spill code) and so must be ignored.
|
|
// Node->LRG->reg mappings are still accurate.
|
|
_regalloc->Register_Allocate();
|
|
|
|
// Bail out if the allocator builds too many nodes
|
|
if (failing()) return;
|
|
}
|
|
|
|
// Prior to register allocation we kept empty basic blocks in case the
|
|
// the allocator needed a place to spill. After register allocation we
|
|
// are not adding any new instructions. If any basic block is empty, we
|
|
// can now safely remove it.
|
|
{
|
|
NOT_PRODUCT( TracePhase t2("blockOrdering", &_t_blockOrdering, TimeCompiler); )
|
|
cfg.remove_empty();
|
|
if (do_freq_based_layout()) {
|
|
PhaseBlockLayout layout(cfg);
|
|
} else {
|
|
cfg.set_loop_alignment();
|
|
}
|
|
cfg.fixup_flow();
|
|
}
|
|
|
|
// Perform any platform dependent postallocation verifications.
|
|
debug_only( _regalloc->pd_postallocate_verify_hook(); )
|
|
|
|
// Apply peephole optimizations
|
|
if( OptoPeephole ) {
|
|
NOT_PRODUCT( TracePhase t2("peephole", &_t_peephole, TimeCompiler); )
|
|
PhasePeephole peep( _regalloc, cfg);
|
|
peep.do_transform();
|
|
}
|
|
|
|
// Convert Nodes to instruction bits in a buffer
|
|
{
|
|
// %%%% workspace merge brought two timers together for one job
|
|
TracePhase t2a("output", &_t_output, true);
|
|
NOT_PRODUCT( TraceTime t2b(NULL, &_t_codeGeneration, TimeCompiler, false); )
|
|
Output();
|
|
}
|
|
|
|
print_method("Final Code");
|
|
|
|
// He's dead, Jim.
|
|
_cfg = (PhaseCFG*)0xdeadbeef;
|
|
_regalloc = (PhaseChaitin*)0xdeadbeef;
|
|
}
|
|
|
|
|
|
//------------------------------dump_asm---------------------------------------
|
|
// Dump formatted assembly
|
|
#ifndef PRODUCT
|
|
void Compile::dump_asm(int *pcs, uint pc_limit) {
|
|
bool cut_short = false;
|
|
tty->print_cr("#");
|
|
tty->print("# "); _tf->dump(); tty->cr();
|
|
tty->print_cr("#");
|
|
|
|
// For all blocks
|
|
int pc = 0x0; // Program counter
|
|
char starts_bundle = ' ';
|
|
_regalloc->dump_frame();
|
|
|
|
Node *n = NULL;
|
|
for( uint i=0; i<_cfg->_num_blocks; i++ ) {
|
|
if (VMThread::should_terminate()) { cut_short = true; break; }
|
|
Block *b = _cfg->_blocks[i];
|
|
if (b->is_connector() && !Verbose) continue;
|
|
n = b->_nodes[0];
|
|
if (pcs && n->_idx < pc_limit)
|
|
tty->print("%3.3x ", pcs[n->_idx]);
|
|
else
|
|
tty->print(" ");
|
|
b->dump_head( &_cfg->_bbs );
|
|
if (b->is_connector()) {
|
|
tty->print_cr(" # Empty connector block");
|
|
} else if (b->num_preds() == 2 && b->pred(1)->is_CatchProj() && b->pred(1)->as_CatchProj()->_con == CatchProjNode::fall_through_index) {
|
|
tty->print_cr(" # Block is sole successor of call");
|
|
}
|
|
|
|
// For all instructions
|
|
Node *delay = NULL;
|
|
for( uint j = 0; j<b->_nodes.size(); j++ ) {
|
|
if (VMThread::should_terminate()) { cut_short = true; break; }
|
|
n = b->_nodes[j];
|
|
if (valid_bundle_info(n)) {
|
|
Bundle *bundle = node_bundling(n);
|
|
if (bundle->used_in_unconditional_delay()) {
|
|
delay = n;
|
|
continue;
|
|
}
|
|
if (bundle->starts_bundle())
|
|
starts_bundle = '+';
|
|
}
|
|
|
|
if (WizardMode) n->dump();
|
|
|
|
if( !n->is_Region() && // Dont print in the Assembly
|
|
!n->is_Phi() && // a few noisely useless nodes
|
|
!n->is_Proj() &&
|
|
!n->is_MachTemp() &&
|
|
!n->is_Catch() && // Would be nice to print exception table targets
|
|
!n->is_MergeMem() && // Not very interesting
|
|
!n->is_top() && // Debug info table constants
|
|
!(n->is_Con() && !n->is_Mach())// Debug info table constants
|
|
) {
|
|
if (pcs && n->_idx < pc_limit)
|
|
tty->print("%3.3x", pcs[n->_idx]);
|
|
else
|
|
tty->print(" ");
|
|
tty->print(" %c ", starts_bundle);
|
|
starts_bundle = ' ';
|
|
tty->print("\t");
|
|
n->format(_regalloc, tty);
|
|
tty->cr();
|
|
}
|
|
|
|
// If we have an instruction with a delay slot, and have seen a delay,
|
|
// then back up and print it
|
|
if (valid_bundle_info(n) && node_bundling(n)->use_unconditional_delay()) {
|
|
assert(delay != NULL, "no unconditional delay instruction");
|
|
if (WizardMode) delay->dump();
|
|
|
|
if (node_bundling(delay)->starts_bundle())
|
|
starts_bundle = '+';
|
|
if (pcs && n->_idx < pc_limit)
|
|
tty->print("%3.3x", pcs[n->_idx]);
|
|
else
|
|
tty->print(" ");
|
|
tty->print(" %c ", starts_bundle);
|
|
starts_bundle = ' ';
|
|
tty->print("\t");
|
|
delay->format(_regalloc, tty);
|
|
tty->print_cr("");
|
|
delay = NULL;
|
|
}
|
|
|
|
// Dump the exception table as well
|
|
if( n->is_Catch() && (Verbose || WizardMode) ) {
|
|
// Print the exception table for this offset
|
|
_handler_table.print_subtable_for(pc);
|
|
}
|
|
}
|
|
|
|
if (pcs && n->_idx < pc_limit)
|
|
tty->print_cr("%3.3x", pcs[n->_idx]);
|
|
else
|
|
tty->print_cr("");
|
|
|
|
assert(cut_short || delay == NULL, "no unconditional delay branch");
|
|
|
|
} // End of per-block dump
|
|
tty->print_cr("");
|
|
|
|
if (cut_short) tty->print_cr("*** disassembly is cut short ***");
|
|
}
|
|
#endif
|
|
|
|
//------------------------------Final_Reshape_Counts---------------------------
|
|
// This class defines counters to help identify when a method
|
|
// may/must be executed using hardware with only 24-bit precision.
|
|
struct Final_Reshape_Counts : public StackObj {
|
|
int _call_count; // count non-inlined 'common' calls
|
|
int _float_count; // count float ops requiring 24-bit precision
|
|
int _double_count; // count double ops requiring more precision
|
|
int _java_call_count; // count non-inlined 'java' calls
|
|
VectorSet _visited; // Visitation flags
|
|
Node_List _tests; // Set of IfNodes & PCTableNodes
|
|
|
|
Final_Reshape_Counts() :
|
|
_call_count(0), _float_count(0), _double_count(0), _java_call_count(0),
|
|
_visited( Thread::current()->resource_area() ) { }
|
|
|
|
void inc_call_count () { _call_count ++; }
|
|
void inc_float_count () { _float_count ++; }
|
|
void inc_double_count() { _double_count++; }
|
|
void inc_java_call_count() { _java_call_count++; }
|
|
|
|
int get_call_count () const { return _call_count ; }
|
|
int get_float_count () const { return _float_count ; }
|
|
int get_double_count() const { return _double_count; }
|
|
int get_java_call_count() const { return _java_call_count; }
|
|
};
|
|
|
|
static bool oop_offset_is_sane(const TypeInstPtr* tp) {
|
|
ciInstanceKlass *k = tp->klass()->as_instance_klass();
|
|
// Make sure the offset goes inside the instance layout.
|
|
return k->contains_field_offset(tp->offset());
|
|
// Note that OffsetBot and OffsetTop are very negative.
|
|
}
|
|
|
|
//------------------------------final_graph_reshaping_impl----------------------
|
|
// Implement items 1-5 from final_graph_reshaping below.
|
|
static void final_graph_reshaping_impl( Node *n, Final_Reshape_Counts &fpu ) {
|
|
|
|
if ( n->outcnt() == 0 ) return; // dead node
|
|
uint nop = n->Opcode();
|
|
|
|
// Check for 2-input instruction with "last use" on right input.
|
|
// Swap to left input. Implements item (2).
|
|
if( n->req() == 3 && // two-input instruction
|
|
n->in(1)->outcnt() > 1 && // left use is NOT a last use
|
|
(!n->in(1)->is_Phi() || n->in(1)->in(2) != n) && // it is not data loop
|
|
n->in(2)->outcnt() == 1 &&// right use IS a last use
|
|
!n->in(2)->is_Con() ) { // right use is not a constant
|
|
// Check for commutative opcode
|
|
switch( nop ) {
|
|
case Op_AddI: case Op_AddF: case Op_AddD: case Op_AddL:
|
|
case Op_MaxI: case Op_MinI:
|
|
case Op_MulI: case Op_MulF: case Op_MulD: case Op_MulL:
|
|
case Op_AndL: case Op_XorL: case Op_OrL:
|
|
case Op_AndI: case Op_XorI: case Op_OrI: {
|
|
// Move "last use" input to left by swapping inputs
|
|
n->swap_edges(1, 2);
|
|
break;
|
|
}
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
|
|
// Count FPU ops and common calls, implements item (3)
|
|
switch( nop ) {
|
|
// Count all float operations that may use FPU
|
|
case Op_AddF:
|
|
case Op_SubF:
|
|
case Op_MulF:
|
|
case Op_DivF:
|
|
case Op_NegF:
|
|
case Op_ModF:
|
|
case Op_ConvI2F:
|
|
case Op_ConF:
|
|
case Op_CmpF:
|
|
case Op_CmpF3:
|
|
// case Op_ConvL2F: // longs are split into 32-bit halves
|
|
fpu.inc_float_count();
|
|
break;
|
|
|
|
case Op_ConvF2D:
|
|
case Op_ConvD2F:
|
|
fpu.inc_float_count();
|
|
fpu.inc_double_count();
|
|
break;
|
|
|
|
// Count all double operations that may use FPU
|
|
case Op_AddD:
|
|
case Op_SubD:
|
|
case Op_MulD:
|
|
case Op_DivD:
|
|
case Op_NegD:
|
|
case Op_ModD:
|
|
case Op_ConvI2D:
|
|
case Op_ConvD2I:
|
|
// case Op_ConvL2D: // handled by leaf call
|
|
// case Op_ConvD2L: // handled by leaf call
|
|
case Op_ConD:
|
|
case Op_CmpD:
|
|
case Op_CmpD3:
|
|
fpu.inc_double_count();
|
|
break;
|
|
case Op_Opaque1: // Remove Opaque Nodes before matching
|
|
case Op_Opaque2: // Remove Opaque Nodes before matching
|
|
n->subsume_by(n->in(1));
|
|
break;
|
|
case Op_CallStaticJava:
|
|
case Op_CallJava:
|
|
case Op_CallDynamicJava:
|
|
fpu.inc_java_call_count(); // Count java call site;
|
|
case Op_CallRuntime:
|
|
case Op_CallLeaf:
|
|
case Op_CallLeafNoFP: {
|
|
assert( n->is_Call(), "" );
|
|
CallNode *call = n->as_Call();
|
|
// Count call sites where the FP mode bit would have to be flipped.
|
|
// Do not count uncommon runtime calls:
|
|
// uncommon_trap, _complete_monitor_locking, _complete_monitor_unlocking,
|
|
// _new_Java, _new_typeArray, _new_objArray, _rethrow_Java, ...
|
|
if( !call->is_CallStaticJava() || !call->as_CallStaticJava()->_name ) {
|
|
fpu.inc_call_count(); // Count the call site
|
|
} else { // See if uncommon argument is shared
|
|
Node *n = call->in(TypeFunc::Parms);
|
|
int nop = n->Opcode();
|
|
// Clone shared simple arguments to uncommon calls, item (1).
|
|
if( n->outcnt() > 1 &&
|
|
!n->is_Proj() &&
|
|
nop != Op_CreateEx &&
|
|
nop != Op_CheckCastPP &&
|
|
nop != Op_DecodeN &&
|
|
!n->is_Mem() ) {
|
|
Node *x = n->clone();
|
|
call->set_req( TypeFunc::Parms, x );
|
|
}
|
|
}
|
|
break;
|
|
}
|
|
|
|
case Op_StoreD:
|
|
case Op_LoadD:
|
|
case Op_LoadD_unaligned:
|
|
fpu.inc_double_count();
|
|
goto handle_mem;
|
|
case Op_StoreF:
|
|
case Op_LoadF:
|
|
fpu.inc_float_count();
|
|
goto handle_mem;
|
|
|
|
case Op_StoreB:
|
|
case Op_StoreC:
|
|
case Op_StoreCM:
|
|
case Op_StorePConditional:
|
|
case Op_StoreI:
|
|
case Op_StoreL:
|
|
case Op_StoreIConditional:
|
|
case Op_StoreLConditional:
|
|
case Op_CompareAndSwapI:
|
|
case Op_CompareAndSwapL:
|
|
case Op_CompareAndSwapP:
|
|
case Op_CompareAndSwapN:
|
|
case Op_StoreP:
|
|
case Op_StoreN:
|
|
case Op_LoadB:
|
|
case Op_LoadUB:
|
|
case Op_LoadUS:
|
|
case Op_LoadI:
|
|
case Op_LoadUI2L:
|
|
case Op_LoadKlass:
|
|
case Op_LoadNKlass:
|
|
case Op_LoadL:
|
|
case Op_LoadL_unaligned:
|
|
case Op_LoadPLocked:
|
|
case Op_LoadLLocked:
|
|
case Op_LoadP:
|
|
case Op_LoadN:
|
|
case Op_LoadRange:
|
|
case Op_LoadS: {
|
|
handle_mem:
|
|
#ifdef ASSERT
|
|
if( VerifyOptoOopOffsets ) {
|
|
assert( n->is_Mem(), "" );
|
|
MemNode *mem = (MemNode*)n;
|
|
// Check to see if address types have grounded out somehow.
|
|
const TypeInstPtr *tp = mem->in(MemNode::Address)->bottom_type()->isa_instptr();
|
|
assert( !tp || oop_offset_is_sane(tp), "" );
|
|
}
|
|
#endif
|
|
break;
|
|
}
|
|
|
|
case Op_AddP: { // Assert sane base pointers
|
|
Node *addp = n->in(AddPNode::Address);
|
|
assert( !addp->is_AddP() ||
|
|
addp->in(AddPNode::Base)->is_top() || // Top OK for allocation
|
|
addp->in(AddPNode::Base) == n->in(AddPNode::Base),
|
|
"Base pointers must match" );
|
|
#ifdef _LP64
|
|
if (UseCompressedOops &&
|
|
addp->Opcode() == Op_ConP &&
|
|
addp == n->in(AddPNode::Base) &&
|
|
n->in(AddPNode::Offset)->is_Con()) {
|
|
// Use addressing with narrow klass to load with offset on x86.
|
|
// On sparc loading 32-bits constant and decoding it have less
|
|
// instructions (4) then load 64-bits constant (7).
|
|
// Do this transformation here since IGVN will convert ConN back to ConP.
|
|
const Type* t = addp->bottom_type();
|
|
if (t->isa_oopptr()) {
|
|
Node* nn = NULL;
|
|
|
|
// Look for existing ConN node of the same exact type.
|
|
Compile* C = Compile::current();
|
|
Node* r = C->root();
|
|
uint cnt = r->outcnt();
|
|
for (uint i = 0; i < cnt; i++) {
|
|
Node* m = r->raw_out(i);
|
|
if (m!= NULL && m->Opcode() == Op_ConN &&
|
|
m->bottom_type()->make_ptr() == t) {
|
|
nn = m;
|
|
break;
|
|
}
|
|
}
|
|
if (nn != NULL) {
|
|
// Decode a narrow oop to match address
|
|
// [R12 + narrow_oop_reg<<3 + offset]
|
|
nn = new (C, 2) DecodeNNode(nn, t);
|
|
n->set_req(AddPNode::Base, nn);
|
|
n->set_req(AddPNode::Address, nn);
|
|
if (addp->outcnt() == 0) {
|
|
addp->disconnect_inputs(NULL);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
#endif
|
|
break;
|
|
}
|
|
|
|
#ifdef _LP64
|
|
case Op_CastPP:
|
|
if (n->in(1)->is_DecodeN() && Universe::narrow_oop_use_implicit_null_checks()) {
|
|
Compile* C = Compile::current();
|
|
Node* in1 = n->in(1);
|
|
const Type* t = n->bottom_type();
|
|
Node* new_in1 = in1->clone();
|
|
new_in1->as_DecodeN()->set_type(t);
|
|
|
|
if (!Matcher::clone_shift_expressions) {
|
|
//
|
|
// x86, ARM and friends can handle 2 adds in addressing mode
|
|
// and Matcher can fold a DecodeN node into address by using
|
|
// a narrow oop directly and do implicit NULL check in address:
|
|
//
|
|
// [R12 + narrow_oop_reg<<3 + offset]
|
|
// NullCheck narrow_oop_reg
|
|
//
|
|
// On other platforms (Sparc) we have to keep new DecodeN node and
|
|
// use it to do implicit NULL check in address:
|
|
//
|
|
// decode_not_null narrow_oop_reg, base_reg
|
|
// [base_reg + offset]
|
|
// NullCheck base_reg
|
|
//
|
|
// Pin the new DecodeN node to non-null path on these platform (Sparc)
|
|
// to keep the information to which NULL check the new DecodeN node
|
|
// corresponds to use it as value in implicit_null_check().
|
|
//
|
|
new_in1->set_req(0, n->in(0));
|
|
}
|
|
|
|
n->subsume_by(new_in1);
|
|
if (in1->outcnt() == 0) {
|
|
in1->disconnect_inputs(NULL);
|
|
}
|
|
}
|
|
break;
|
|
|
|
case Op_CmpP:
|
|
// Do this transformation here to preserve CmpPNode::sub() and
|
|
// other TypePtr related Ideal optimizations (for example, ptr nullness).
|
|
if (n->in(1)->is_DecodeN() || n->in(2)->is_DecodeN()) {
|
|
Node* in1 = n->in(1);
|
|
Node* in2 = n->in(2);
|
|
if (!in1->is_DecodeN()) {
|
|
in2 = in1;
|
|
in1 = n->in(2);
|
|
}
|
|
assert(in1->is_DecodeN(), "sanity");
|
|
|
|
Compile* C = Compile::current();
|
|
Node* new_in2 = NULL;
|
|
if (in2->is_DecodeN()) {
|
|
new_in2 = in2->in(1);
|
|
} else if (in2->Opcode() == Op_ConP) {
|
|
const Type* t = in2->bottom_type();
|
|
if (t == TypePtr::NULL_PTR && Universe::narrow_oop_use_implicit_null_checks()) {
|
|
new_in2 = ConNode::make(C, TypeNarrowOop::NULL_PTR);
|
|
//
|
|
// This transformation together with CastPP transformation above
|
|
// will generated code for implicit NULL checks for compressed oops.
|
|
//
|
|
// The original code after Optimize()
|
|
//
|
|
// LoadN memory, narrow_oop_reg
|
|
// decode narrow_oop_reg, base_reg
|
|
// CmpP base_reg, NULL
|
|
// CastPP base_reg // NotNull
|
|
// Load [base_reg + offset], val_reg
|
|
//
|
|
// after these transformations will be
|
|
//
|
|
// LoadN memory, narrow_oop_reg
|
|
// CmpN narrow_oop_reg, NULL
|
|
// decode_not_null narrow_oop_reg, base_reg
|
|
// Load [base_reg + offset], val_reg
|
|
//
|
|
// and the uncommon path (== NULL) will use narrow_oop_reg directly
|
|
// since narrow oops can be used in debug info now (see the code in
|
|
// final_graph_reshaping_walk()).
|
|
//
|
|
// At the end the code will be matched to
|
|
// on x86:
|
|
//
|
|
// Load_narrow_oop memory, narrow_oop_reg
|
|
// Load [R12 + narrow_oop_reg<<3 + offset], val_reg
|
|
// NullCheck narrow_oop_reg
|
|
//
|
|
// and on sparc:
|
|
//
|
|
// Load_narrow_oop memory, narrow_oop_reg
|
|
// decode_not_null narrow_oop_reg, base_reg
|
|
// Load [base_reg + offset], val_reg
|
|
// NullCheck base_reg
|
|
//
|
|
} else if (t->isa_oopptr()) {
|
|
new_in2 = ConNode::make(C, t->make_narrowoop());
|
|
}
|
|
}
|
|
if (new_in2 != NULL) {
|
|
Node* cmpN = new (C, 3) CmpNNode(in1->in(1), new_in2);
|
|
n->subsume_by( cmpN );
|
|
if (in1->outcnt() == 0) {
|
|
in1->disconnect_inputs(NULL);
|
|
}
|
|
if (in2->outcnt() == 0) {
|
|
in2->disconnect_inputs(NULL);
|
|
}
|
|
}
|
|
}
|
|
break;
|
|
|
|
case Op_DecodeN:
|
|
assert(!n->in(1)->is_EncodeP(), "should be optimized out");
|
|
// DecodeN could be pinned on Sparc where it can't be fold into
|
|
// an address expression, see the code for Op_CastPP above.
|
|
assert(n->in(0) == NULL || !Matcher::clone_shift_expressions, "no control except on sparc");
|
|
break;
|
|
|
|
case Op_EncodeP: {
|
|
Node* in1 = n->in(1);
|
|
if (in1->is_DecodeN()) {
|
|
n->subsume_by(in1->in(1));
|
|
} else if (in1->Opcode() == Op_ConP) {
|
|
Compile* C = Compile::current();
|
|
const Type* t = in1->bottom_type();
|
|
if (t == TypePtr::NULL_PTR) {
|
|
n->subsume_by(ConNode::make(C, TypeNarrowOop::NULL_PTR));
|
|
} else if (t->isa_oopptr()) {
|
|
n->subsume_by(ConNode::make(C, t->make_narrowoop()));
|
|
}
|
|
}
|
|
if (in1->outcnt() == 0) {
|
|
in1->disconnect_inputs(NULL);
|
|
}
|
|
break;
|
|
}
|
|
|
|
case Op_Phi:
|
|
if (n->as_Phi()->bottom_type()->isa_narrowoop()) {
|
|
// The EncodeP optimization may create Phi with the same edges
|
|
// for all paths. It is not handled well by Register Allocator.
|
|
Node* unique_in = n->in(1);
|
|
assert(unique_in != NULL, "");
|
|
uint cnt = n->req();
|
|
for (uint i = 2; i < cnt; i++) {
|
|
Node* m = n->in(i);
|
|
assert(m != NULL, "");
|
|
if (unique_in != m)
|
|
unique_in = NULL;
|
|
}
|
|
if (unique_in != NULL) {
|
|
n->subsume_by(unique_in);
|
|
}
|
|
}
|
|
break;
|
|
|
|
#endif
|
|
|
|
case Op_ModI:
|
|
if (UseDivMod) {
|
|
// Check if a%b and a/b both exist
|
|
Node* d = n->find_similar(Op_DivI);
|
|
if (d) {
|
|
// Replace them with a fused divmod if supported
|
|
Compile* C = Compile::current();
|
|
if (Matcher::has_match_rule(Op_DivModI)) {
|
|
DivModINode* divmod = DivModINode::make(C, n);
|
|
d->subsume_by(divmod->div_proj());
|
|
n->subsume_by(divmod->mod_proj());
|
|
} else {
|
|
// replace a%b with a-((a/b)*b)
|
|
Node* mult = new (C, 3) MulINode(d, d->in(2));
|
|
Node* sub = new (C, 3) SubINode(d->in(1), mult);
|
|
n->subsume_by( sub );
|
|
}
|
|
}
|
|
}
|
|
break;
|
|
|
|
case Op_ModL:
|
|
if (UseDivMod) {
|
|
// Check if a%b and a/b both exist
|
|
Node* d = n->find_similar(Op_DivL);
|
|
if (d) {
|
|
// Replace them with a fused divmod if supported
|
|
Compile* C = Compile::current();
|
|
if (Matcher::has_match_rule(Op_DivModL)) {
|
|
DivModLNode* divmod = DivModLNode::make(C, n);
|
|
d->subsume_by(divmod->div_proj());
|
|
n->subsume_by(divmod->mod_proj());
|
|
} else {
|
|
// replace a%b with a-((a/b)*b)
|
|
Node* mult = new (C, 3) MulLNode(d, d->in(2));
|
|
Node* sub = new (C, 3) SubLNode(d->in(1), mult);
|
|
n->subsume_by( sub );
|
|
}
|
|
}
|
|
}
|
|
break;
|
|
|
|
case Op_Load16B:
|
|
case Op_Load8B:
|
|
case Op_Load4B:
|
|
case Op_Load8S:
|
|
case Op_Load4S:
|
|
case Op_Load2S:
|
|
case Op_Load8C:
|
|
case Op_Load4C:
|
|
case Op_Load2C:
|
|
case Op_Load4I:
|
|
case Op_Load2I:
|
|
case Op_Load2L:
|
|
case Op_Load4F:
|
|
case Op_Load2F:
|
|
case Op_Load2D:
|
|
case Op_Store16B:
|
|
case Op_Store8B:
|
|
case Op_Store4B:
|
|
case Op_Store8C:
|
|
case Op_Store4C:
|
|
case Op_Store2C:
|
|
case Op_Store4I:
|
|
case Op_Store2I:
|
|
case Op_Store2L:
|
|
case Op_Store4F:
|
|
case Op_Store2F:
|
|
case Op_Store2D:
|
|
break;
|
|
|
|
case Op_PackB:
|
|
case Op_PackS:
|
|
case Op_PackC:
|
|
case Op_PackI:
|
|
case Op_PackF:
|
|
case Op_PackL:
|
|
case Op_PackD:
|
|
if (n->req()-1 > 2) {
|
|
// Replace many operand PackNodes with a binary tree for matching
|
|
PackNode* p = (PackNode*) n;
|
|
Node* btp = p->binaryTreePack(Compile::current(), 1, n->req());
|
|
n->subsume_by(btp);
|
|
}
|
|
break;
|
|
default:
|
|
assert( !n->is_Call(), "" );
|
|
assert( !n->is_Mem(), "" );
|
|
break;
|
|
}
|
|
|
|
// Collect CFG split points
|
|
if (n->is_MultiBranch())
|
|
fpu._tests.push(n);
|
|
}
|
|
|
|
//------------------------------final_graph_reshaping_walk---------------------
|
|
// Replacing Opaque nodes with their input in final_graph_reshaping_impl(),
|
|
// requires that the walk visits a node's inputs before visiting the node.
|
|
static void final_graph_reshaping_walk( Node_Stack &nstack, Node *root, Final_Reshape_Counts &fpu ) {
|
|
ResourceArea *area = Thread::current()->resource_area();
|
|
Unique_Node_List sfpt(area);
|
|
|
|
fpu._visited.set(root->_idx); // first, mark node as visited
|
|
uint cnt = root->req();
|
|
Node *n = root;
|
|
uint i = 0;
|
|
while (true) {
|
|
if (i < cnt) {
|
|
// Place all non-visited non-null inputs onto stack
|
|
Node* m = n->in(i);
|
|
++i;
|
|
if (m != NULL && !fpu._visited.test_set(m->_idx)) {
|
|
if (m->is_SafePoint() && m->as_SafePoint()->jvms() != NULL)
|
|
sfpt.push(m);
|
|
cnt = m->req();
|
|
nstack.push(n, i); // put on stack parent and next input's index
|
|
n = m;
|
|
i = 0;
|
|
}
|
|
} else {
|
|
// Now do post-visit work
|
|
final_graph_reshaping_impl( n, fpu );
|
|
if (nstack.is_empty())
|
|
break; // finished
|
|
n = nstack.node(); // Get node from stack
|
|
cnt = n->req();
|
|
i = nstack.index();
|
|
nstack.pop(); // Shift to the next node on stack
|
|
}
|
|
}
|
|
|
|
// Go over safepoints nodes to skip DecodeN nodes for debug edges.
|
|
// It could be done for an uncommon traps or any safepoints/calls
|
|
// if the DecodeN node is referenced only in a debug info.
|
|
while (sfpt.size() > 0) {
|
|
n = sfpt.pop();
|
|
JVMState *jvms = n->as_SafePoint()->jvms();
|
|
assert(jvms != NULL, "sanity");
|
|
int start = jvms->debug_start();
|
|
int end = n->req();
|
|
bool is_uncommon = (n->is_CallStaticJava() &&
|
|
n->as_CallStaticJava()->uncommon_trap_request() != 0);
|
|
for (int j = start; j < end; j++) {
|
|
Node* in = n->in(j);
|
|
if (in->is_DecodeN()) {
|
|
bool safe_to_skip = true;
|
|
if (!is_uncommon ) {
|
|
// Is it safe to skip?
|
|
for (uint i = 0; i < in->outcnt(); i++) {
|
|
Node* u = in->raw_out(i);
|
|
if (!u->is_SafePoint() ||
|
|
u->is_Call() && u->as_Call()->has_non_debug_use(n)) {
|
|
safe_to_skip = false;
|
|
}
|
|
}
|
|
}
|
|
if (safe_to_skip) {
|
|
n->set_req(j, in->in(1));
|
|
}
|
|
if (in->outcnt() == 0) {
|
|
in->disconnect_inputs(NULL);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
//------------------------------final_graph_reshaping--------------------------
|
|
// Final Graph Reshaping.
|
|
//
|
|
// (1) Clone simple inputs to uncommon calls, so they can be scheduled late
|
|
// and not commoned up and forced early. Must come after regular
|
|
// optimizations to avoid GVN undoing the cloning. Clone constant
|
|
// inputs to Loop Phis; these will be split by the allocator anyways.
|
|
// Remove Opaque nodes.
|
|
// (2) Move last-uses by commutative operations to the left input to encourage
|
|
// Intel update-in-place two-address operations and better register usage
|
|
// on RISCs. Must come after regular optimizations to avoid GVN Ideal
|
|
// calls canonicalizing them back.
|
|
// (3) Count the number of double-precision FP ops, single-precision FP ops
|
|
// and call sites. On Intel, we can get correct rounding either by
|
|
// forcing singles to memory (requires extra stores and loads after each
|
|
// FP bytecode) or we can set a rounding mode bit (requires setting and
|
|
// clearing the mode bit around call sites). The mode bit is only used
|
|
// if the relative frequency of single FP ops to calls is low enough.
|
|
// This is a key transform for SPEC mpeg_audio.
|
|
// (4) Detect infinite loops; blobs of code reachable from above but not
|
|
// below. Several of the Code_Gen algorithms fail on such code shapes,
|
|
// so we simply bail out. Happens a lot in ZKM.jar, but also happens
|
|
// from time to time in other codes (such as -Xcomp finalizer loops, etc).
|
|
// Detection is by looking for IfNodes where only 1 projection is
|
|
// reachable from below or CatchNodes missing some targets.
|
|
// (5) Assert for insane oop offsets in debug mode.
|
|
|
|
bool Compile::final_graph_reshaping() {
|
|
// an infinite loop may have been eliminated by the optimizer,
|
|
// in which case the graph will be empty.
|
|
if (root()->req() == 1) {
|
|
record_method_not_compilable("trivial infinite loop");
|
|
return true;
|
|
}
|
|
|
|
Final_Reshape_Counts fpu;
|
|
|
|
// Visit everybody reachable!
|
|
// Allocate stack of size C->unique()/2 to avoid frequent realloc
|
|
Node_Stack nstack(unique() >> 1);
|
|
final_graph_reshaping_walk(nstack, root(), fpu);
|
|
|
|
// Check for unreachable (from below) code (i.e., infinite loops).
|
|
for( uint i = 0; i < fpu._tests.size(); i++ ) {
|
|
MultiBranchNode *n = fpu._tests[i]->as_MultiBranch();
|
|
// Get number of CFG targets.
|
|
// Note that PCTables include exception targets after calls.
|
|
uint required_outcnt = n->required_outcnt();
|
|
if (n->outcnt() != required_outcnt) {
|
|
// Check for a few special cases. Rethrow Nodes never take the
|
|
// 'fall-thru' path, so expected kids is 1 less.
|
|
if (n->is_PCTable() && n->in(0) && n->in(0)->in(0)) {
|
|
if (n->in(0)->in(0)->is_Call()) {
|
|
CallNode *call = n->in(0)->in(0)->as_Call();
|
|
if (call->entry_point() == OptoRuntime::rethrow_stub()) {
|
|
required_outcnt--; // Rethrow always has 1 less kid
|
|
} else if (call->req() > TypeFunc::Parms &&
|
|
call->is_CallDynamicJava()) {
|
|
// Check for null receiver. In such case, the optimizer has
|
|
// detected that the virtual call will always result in a null
|
|
// pointer exception. The fall-through projection of this CatchNode
|
|
// will not be populated.
|
|
Node *arg0 = call->in(TypeFunc::Parms);
|
|
if (arg0->is_Type() &&
|
|
arg0->as_Type()->type()->higher_equal(TypePtr::NULL_PTR)) {
|
|
required_outcnt--;
|
|
}
|
|
} else if (call->entry_point() == OptoRuntime::new_array_Java() &&
|
|
call->req() > TypeFunc::Parms+1 &&
|
|
call->is_CallStaticJava()) {
|
|
// Check for negative array length. In such case, the optimizer has
|
|
// detected that the allocation attempt will always result in an
|
|
// exception. There is no fall-through projection of this CatchNode .
|
|
Node *arg1 = call->in(TypeFunc::Parms+1);
|
|
if (arg1->is_Type() &&
|
|
arg1->as_Type()->type()->join(TypeInt::POS)->empty()) {
|
|
required_outcnt--;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
// Recheck with a better notion of 'required_outcnt'
|
|
if (n->outcnt() != required_outcnt) {
|
|
record_method_not_compilable("malformed control flow");
|
|
return true; // Not all targets reachable!
|
|
}
|
|
}
|
|
// Check that I actually visited all kids. Unreached kids
|
|
// must be infinite loops.
|
|
for (DUIterator_Fast jmax, j = n->fast_outs(jmax); j < jmax; j++)
|
|
if (!fpu._visited.test(n->fast_out(j)->_idx)) {
|
|
record_method_not_compilable("infinite loop");
|
|
return true; // Found unvisited kid; must be unreach
|
|
}
|
|
}
|
|
|
|
// If original bytecodes contained a mixture of floats and doubles
|
|
// check if the optimizer has made it homogenous, item (3).
|
|
if( Use24BitFPMode && Use24BitFP &&
|
|
fpu.get_float_count() > 32 &&
|
|
fpu.get_double_count() == 0 &&
|
|
(10 * fpu.get_call_count() < fpu.get_float_count()) ) {
|
|
set_24_bit_selection_and_mode( false, true );
|
|
}
|
|
|
|
set_has_java_calls(fpu.get_java_call_count() > 0);
|
|
|
|
// No infinite loops, no reason to bail out.
|
|
return false;
|
|
}
|
|
|
|
//-----------------------------too_many_traps----------------------------------
|
|
// Report if there are too many traps at the current method and bci.
|
|
// Return true if there was a trap, and/or PerMethodTrapLimit is exceeded.
|
|
bool Compile::too_many_traps(ciMethod* method,
|
|
int bci,
|
|
Deoptimization::DeoptReason reason) {
|
|
ciMethodData* md = method->method_data();
|
|
if (md->is_empty()) {
|
|
// Assume the trap has not occurred, or that it occurred only
|
|
// because of a transient condition during start-up in the interpreter.
|
|
return false;
|
|
}
|
|
if (md->has_trap_at(bci, reason) != 0) {
|
|
// Assume PerBytecodeTrapLimit==0, for a more conservative heuristic.
|
|
// Also, if there are multiple reasons, or if there is no per-BCI record,
|
|
// assume the worst.
|
|
if (log())
|
|
log()->elem("observe trap='%s' count='%d'",
|
|
Deoptimization::trap_reason_name(reason),
|
|
md->trap_count(reason));
|
|
return true;
|
|
} else {
|
|
// Ignore method/bci and see if there have been too many globally.
|
|
return too_many_traps(reason, md);
|
|
}
|
|
}
|
|
|
|
// Less-accurate variant which does not require a method and bci.
|
|
bool Compile::too_many_traps(Deoptimization::DeoptReason reason,
|
|
ciMethodData* logmd) {
|
|
if (trap_count(reason) >= (uint)PerMethodTrapLimit) {
|
|
// Too many traps globally.
|
|
// Note that we use cumulative trap_count, not just md->trap_count.
|
|
if (log()) {
|
|
int mcount = (logmd == NULL)? -1: (int)logmd->trap_count(reason);
|
|
log()->elem("observe trap='%s' count='0' mcount='%d' ccount='%d'",
|
|
Deoptimization::trap_reason_name(reason),
|
|
mcount, trap_count(reason));
|
|
}
|
|
return true;
|
|
} else {
|
|
// The coast is clear.
|
|
return false;
|
|
}
|
|
}
|
|
|
|
//--------------------------too_many_recompiles--------------------------------
|
|
// Report if there are too many recompiles at the current method and bci.
|
|
// Consults PerBytecodeRecompilationCutoff and PerMethodRecompilationCutoff.
|
|
// Is not eager to return true, since this will cause the compiler to use
|
|
// Action_none for a trap point, to avoid too many recompilations.
|
|
bool Compile::too_many_recompiles(ciMethod* method,
|
|
int bci,
|
|
Deoptimization::DeoptReason reason) {
|
|
ciMethodData* md = method->method_data();
|
|
if (md->is_empty()) {
|
|
// Assume the trap has not occurred, or that it occurred only
|
|
// because of a transient condition during start-up in the interpreter.
|
|
return false;
|
|
}
|
|
// Pick a cutoff point well within PerBytecodeRecompilationCutoff.
|
|
uint bc_cutoff = (uint) PerBytecodeRecompilationCutoff / 8;
|
|
uint m_cutoff = (uint) PerMethodRecompilationCutoff / 2 + 1; // not zero
|
|
Deoptimization::DeoptReason per_bc_reason
|
|
= Deoptimization::reason_recorded_per_bytecode_if_any(reason);
|
|
if ((per_bc_reason == Deoptimization::Reason_none
|
|
|| md->has_trap_at(bci, reason) != 0)
|
|
// The trap frequency measure we care about is the recompile count:
|
|
&& md->trap_recompiled_at(bci)
|
|
&& md->overflow_recompile_count() >= bc_cutoff) {
|
|
// Do not emit a trap here if it has already caused recompilations.
|
|
// Also, if there are multiple reasons, or if there is no per-BCI record,
|
|
// assume the worst.
|
|
if (log())
|
|
log()->elem("observe trap='%s recompiled' count='%d' recompiles2='%d'",
|
|
Deoptimization::trap_reason_name(reason),
|
|
md->trap_count(reason),
|
|
md->overflow_recompile_count());
|
|
return true;
|
|
} else if (trap_count(reason) != 0
|
|
&& decompile_count() >= m_cutoff) {
|
|
// Too many recompiles globally, and we have seen this sort of trap.
|
|
// Use cumulative decompile_count, not just md->decompile_count.
|
|
if (log())
|
|
log()->elem("observe trap='%s' count='%d' mcount='%d' decompiles='%d' mdecompiles='%d'",
|
|
Deoptimization::trap_reason_name(reason),
|
|
md->trap_count(reason), trap_count(reason),
|
|
md->decompile_count(), decompile_count());
|
|
return true;
|
|
} else {
|
|
// The coast is clear.
|
|
return false;
|
|
}
|
|
}
|
|
|
|
|
|
#ifndef PRODUCT
|
|
//------------------------------verify_graph_edges---------------------------
|
|
// Walk the Graph and verify that there is a one-to-one correspondence
|
|
// between Use-Def edges and Def-Use edges in the graph.
|
|
void Compile::verify_graph_edges(bool no_dead_code) {
|
|
if (VerifyGraphEdges) {
|
|
ResourceArea *area = Thread::current()->resource_area();
|
|
Unique_Node_List visited(area);
|
|
// Call recursive graph walk to check edges
|
|
_root->verify_edges(visited);
|
|
if (no_dead_code) {
|
|
// Now make sure that no visited node is used by an unvisited node.
|
|
bool dead_nodes = 0;
|
|
Unique_Node_List checked(area);
|
|
while (visited.size() > 0) {
|
|
Node* n = visited.pop();
|
|
checked.push(n);
|
|
for (uint i = 0; i < n->outcnt(); i++) {
|
|
Node* use = n->raw_out(i);
|
|
if (checked.member(use)) continue; // already checked
|
|
if (visited.member(use)) continue; // already in the graph
|
|
if (use->is_Con()) continue; // a dead ConNode is OK
|
|
// At this point, we have found a dead node which is DU-reachable.
|
|
if (dead_nodes++ == 0)
|
|
tty->print_cr("*** Dead nodes reachable via DU edges:");
|
|
use->dump(2);
|
|
tty->print_cr("---");
|
|
checked.push(use); // No repeats; pretend it is now checked.
|
|
}
|
|
}
|
|
assert(dead_nodes == 0, "using nodes must be reachable from root");
|
|
}
|
|
}
|
|
}
|
|
#endif
|
|
|
|
// The Compile object keeps track of failure reasons separately from the ciEnv.
|
|
// This is required because there is not quite a 1-1 relation between the
|
|
// ciEnv and its compilation task and the Compile object. Note that one
|
|
// ciEnv might use two Compile objects, if C2Compiler::compile_method decides
|
|
// to backtrack and retry without subsuming loads. Other than this backtracking
|
|
// behavior, the Compile's failure reason is quietly copied up to the ciEnv
|
|
// by the logic in C2Compiler.
|
|
void Compile::record_failure(const char* reason) {
|
|
if (log() != NULL) {
|
|
log()->elem("failure reason='%s' phase='compile'", reason);
|
|
}
|
|
if (_failure_reason == NULL) {
|
|
// Record the first failure reason.
|
|
_failure_reason = reason;
|
|
}
|
|
if (!C->failure_reason_is(C2Compiler::retry_no_subsuming_loads())) {
|
|
C->print_method(_failure_reason);
|
|
}
|
|
_root = NULL; // flush the graph, too
|
|
}
|
|
|
|
Compile::TracePhase::TracePhase(const char* name, elapsedTimer* accumulator, bool dolog)
|
|
: TraceTime(NULL, accumulator, false NOT_PRODUCT( || TimeCompiler ), false)
|
|
{
|
|
if (dolog) {
|
|
C = Compile::current();
|
|
_log = C->log();
|
|
} else {
|
|
C = NULL;
|
|
_log = NULL;
|
|
}
|
|
if (_log != NULL) {
|
|
_log->begin_head("phase name='%s' nodes='%d'", name, C->unique());
|
|
_log->stamp();
|
|
_log->end_head();
|
|
}
|
|
}
|
|
|
|
Compile::TracePhase::~TracePhase() {
|
|
if (_log != NULL) {
|
|
_log->done("phase nodes='%d'", C->unique());
|
|
}
|
|
}
|