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compile.cpp
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compile.cpp
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/*
* Copyright (c) 1997, 2021, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*
*/
#include "precompiled.hpp"
#include "jvm_io.h"
#include "asm/macroAssembler.hpp"
#include "asm/macroAssembler.inline.hpp"
#include "ci/ciReplay.hpp"
#include "classfile/javaClasses.hpp"
#include "code/exceptionHandlerTable.hpp"
#include "code/nmethod.hpp"
#include "compiler/compileBroker.hpp"
#include "compiler/compileLog.hpp"
#include "compiler/disassembler.hpp"
#include "compiler/oopMap.hpp"
#include "gc/shared/barrierSet.hpp"
#include "gc/shared/c2/barrierSetC2.hpp"
#include "jfr/jfrEvents.hpp"
#include "memory/resourceArea.hpp"
#include "opto/addnode.hpp"
#include "opto/block.hpp"
#include "opto/c2compiler.hpp"
#include "opto/callGenerator.hpp"
#include "opto/callnode.hpp"
#include "opto/castnode.hpp"
#include "opto/cfgnode.hpp"
#include "opto/chaitin.hpp"
#include "opto/compile.hpp"
#include "opto/connode.hpp"
#include "opto/convertnode.hpp"
#include "opto/divnode.hpp"
#include "opto/escape.hpp"
#include "opto/idealGraphPrinter.hpp"
#include "opto/loopnode.hpp"
#include "opto/machnode.hpp"
#include "opto/macro.hpp"
#include "opto/matcher.hpp"
#include "opto/mathexactnode.hpp"
#include "opto/memnode.hpp"
#include "opto/mulnode.hpp"
#include "opto/narrowptrnode.hpp"
#include "opto/node.hpp"
#include "opto/opcodes.hpp"
#include "opto/output.hpp"
#include "opto/parse.hpp"
#include "opto/phaseX.hpp"
#include "opto/rootnode.hpp"
#include "opto/runtime.hpp"
#include "opto/stringopts.hpp"
#include "opto/type.hpp"
#include "opto/vector.hpp"
#include "opto/vectornode.hpp"
#include "runtime/globals_extension.hpp"
#include "runtime/sharedRuntime.hpp"
#include "runtime/signature.hpp"
#include "runtime/stubRoutines.hpp"
#include "runtime/timer.hpp"
#include "utilities/align.hpp"
#include "utilities/copy.hpp"
#include "utilities/macros.hpp"
#include "utilities/resourceHash.hpp"
// -------------------- Compile::mach_constant_base_node -----------------------
// Constant table base node singleton.
MachConstantBaseNode* Compile::mach_constant_base_node() {
if (_mach_constant_base_node == NULL) {
_mach_constant_base_node = new MachConstantBaseNode();
_mach_constant_base_node->add_req(C->root());
}
return _mach_constant_base_node;
}
/// Support for intrinsics.
// Return the index at which m must be inserted (or already exists).
// The sort order is by the address of the ciMethod, with is_virtual as minor key.
class IntrinsicDescPair {
private:
ciMethod* _m;
bool _is_virtual;
public:
IntrinsicDescPair(ciMethod* m, bool is_virtual) : _m(m), _is_virtual(is_virtual) {}
static int compare(IntrinsicDescPair* const& key, CallGenerator* const& elt) {
ciMethod* m= elt->method();
ciMethod* key_m = key->_m;
if (key_m < m) return -1;
else if (key_m > m) return 1;
else {
bool is_virtual = elt->is_virtual();
bool key_virtual = key->_is_virtual;
if (key_virtual < is_virtual) return -1;
else if (key_virtual > is_virtual) return 1;
else return 0;
}
}
};
int Compile::intrinsic_insertion_index(ciMethod* m, bool is_virtual, bool& found) {
#ifdef ASSERT
for (int i = 1; i < _intrinsics.length(); i++) {
CallGenerator* cg1 = _intrinsics.at(i-1);
CallGenerator* cg2 = _intrinsics.at(i);
assert(cg1->method() != cg2->method()
? cg1->method() < cg2->method()
: cg1->is_virtual() < cg2->is_virtual(),
"compiler intrinsics list must stay sorted");
}
#endif
IntrinsicDescPair pair(m, is_virtual);
return _intrinsics.find_sorted<IntrinsicDescPair*, IntrinsicDescPair::compare>(&pair, found);
}
void Compile::register_intrinsic(CallGenerator* cg) {
bool found = false;
int index = intrinsic_insertion_index(cg->method(), cg->is_virtual(), found);
assert(!found, "registering twice");
_intrinsics.insert_before(index, cg);
assert(find_intrinsic(cg->method(), cg->is_virtual()) == cg, "registration worked");
}
CallGenerator* Compile::find_intrinsic(ciMethod* m, bool is_virtual) {
assert(m->is_loaded(), "don't try this on unloaded methods");
if (_intrinsics.length() > 0) {
bool found = false;
int index = intrinsic_insertion_index(m, is_virtual, found);
if (found) {
return _intrinsics.at(index);
}
}
// Lazily create intrinsics for intrinsic IDs well-known in the runtime.
if (m->intrinsic_id() != vmIntrinsics::_none &&
m->intrinsic_id() <= vmIntrinsics::LAST_COMPILER_INLINE) {
CallGenerator* cg = make_vm_intrinsic(m, is_virtual);
if (cg != NULL) {
// Save it for next time:
register_intrinsic(cg);
return cg;
} else {
gather_intrinsic_statistics(m->intrinsic_id(), is_virtual, _intrinsic_disabled);
}
}
return NULL;
}
// Compile::make_vm_intrinsic is defined in library_call.cpp.
#ifndef PRODUCT
// statistics gathering...
juint Compile::_intrinsic_hist_count[vmIntrinsics::number_of_intrinsics()] = {0};
jubyte Compile::_intrinsic_hist_flags[vmIntrinsics::number_of_intrinsics()] = {0};
inline int as_int(vmIntrinsics::ID id) {
return vmIntrinsics::as_int(id);
}
bool Compile::gather_intrinsic_statistics(vmIntrinsics::ID id, bool is_virtual, int flags) {
assert(id > vmIntrinsics::_none && id < vmIntrinsics::ID_LIMIT, "oob");
int oflags = _intrinsic_hist_flags[as_int(id)];
assert(flags != 0, "what happened?");
if (is_virtual) {
flags |= _intrinsic_virtual;
}
bool changed = (flags != oflags);
if ((flags & _intrinsic_worked) != 0) {
juint count = (_intrinsic_hist_count[as_int(id)] += 1);
if (count == 1) {
changed = true; // first time
}
// increment the overall count also:
_intrinsic_hist_count[as_int(vmIntrinsics::_none)] += 1;
}
if (changed) {
if (((oflags ^ flags) & _intrinsic_virtual) != 0) {
// Something changed about the intrinsic's virtuality.
if ((flags & _intrinsic_virtual) != 0) {
// This is the first use of this intrinsic as a virtual call.
if (oflags != 0) {
// We already saw it as a non-virtual, so note both cases.
flags |= _intrinsic_both;
}
} else if ((oflags & _intrinsic_both) == 0) {
// This is the first use of this intrinsic as a non-virtual
flags |= _intrinsic_both;
}
}
_intrinsic_hist_flags[as_int(id)] = (jubyte) (oflags | flags);
}
// update the overall flags also:
_intrinsic_hist_flags[as_int(vmIntrinsics::_none)] |= (jubyte) flags;
return changed;
}
static char* format_flags(int flags, char* buf) {
buf[0] = 0;
if ((flags & Compile::_intrinsic_worked) != 0) strcat(buf, ",worked");
if ((flags & Compile::_intrinsic_failed) != 0) strcat(buf, ",failed");
if ((flags & Compile::_intrinsic_disabled) != 0) strcat(buf, ",disabled");
if ((flags & Compile::_intrinsic_virtual) != 0) strcat(buf, ",virtual");
if ((flags & Compile::_intrinsic_both) != 0) strcat(buf, ",nonvirtual");
if (buf[0] == 0) strcat(buf, ",");
assert(buf[0] == ',', "must be");
return &buf[1];
}
void Compile::print_intrinsic_statistics() {
char flagsbuf[100];
ttyLocker ttyl;
if (xtty != NULL) xtty->head("statistics type='intrinsic'");
tty->print_cr("Compiler intrinsic usage:");
juint total = _intrinsic_hist_count[as_int(vmIntrinsics::_none)];
if (total == 0) total = 1; // avoid div0 in case of no successes
#define PRINT_STAT_LINE(name, c, f) \
tty->print_cr(" %4d (%4.1f%%) %s (%s)", (int)(c), ((c) * 100.0) / total, name, f);
for (auto id : EnumRange<vmIntrinsicID>{}) {
int flags = _intrinsic_hist_flags[as_int(id)];
juint count = _intrinsic_hist_count[as_int(id)];
if ((flags | count) != 0) {
PRINT_STAT_LINE(vmIntrinsics::name_at(id), count, format_flags(flags, flagsbuf));
}
}
PRINT_STAT_LINE("total", total, format_flags(_intrinsic_hist_flags[as_int(vmIntrinsics::_none)], flagsbuf));
if (xtty != NULL) xtty->tail("statistics");
}
void Compile::print_statistics() {
{ ttyLocker ttyl;
if (xtty != NULL) xtty->head("statistics type='opto'");
Parse::print_statistics();
PhaseCCP::print_statistics();
PhaseRegAlloc::print_statistics();
PhaseOutput::print_statistics();
PhasePeephole::print_statistics();
PhaseIdealLoop::print_statistics();
if (xtty != NULL) xtty->tail("statistics");
}
if (_intrinsic_hist_flags[as_int(vmIntrinsics::_none)] != 0) {
// put this under its own <statistics> element.
print_intrinsic_statistics();
}
}
#endif //PRODUCT
void Compile::gvn_replace_by(Node* n, Node* nn) {
for (DUIterator_Last imin, i = n->last_outs(imin); i >= imin; ) {
Node* use = n->last_out(i);
bool is_in_table = initial_gvn()->hash_delete(use);
uint uses_found = 0;
for (uint j = 0; j < use->len(); j++) {
if (use->in(j) == n) {
if (j < use->req())
use->set_req(j, nn);
else
use->set_prec(j, nn);
uses_found++;
}
}
if (is_in_table) {
// reinsert into table
initial_gvn()->hash_find_insert(use);
}
record_for_igvn(use);
i -= uses_found; // we deleted 1 or more copies of this edge
}
}
static inline bool not_a_node(const Node* n) {
if (n == NULL) return true;
if (((intptr_t)n & 1) != 0) return true; // uninitialized, etc.
if (*(address*)n == badAddress) return true; // kill by Node::destruct
return false;
}
// Identify all nodes that are reachable from below, useful.
// Use breadth-first pass that records state in a Unique_Node_List,
// recursive traversal is slower.
void Compile::identify_useful_nodes(Unique_Node_List &useful) {
int estimated_worklist_size = live_nodes();
useful.map( estimated_worklist_size, NULL ); // preallocate space
// Initialize worklist
if (root() != NULL) { useful.push(root()); }
// If 'top' is cached, declare it useful to preserve cached node
if( cached_top_node() ) { useful.push(cached_top_node()); }
// Push all useful nodes onto the list, breadthfirst
for( uint next = 0; next < useful.size(); ++next ) {
assert( next < unique(), "Unique useful nodes < total nodes");
Node *n = useful.at(next);
uint max = n->len();
for( uint i = 0; i < max; ++i ) {
Node *m = n->in(i);
if (not_a_node(m)) continue;
useful.push(m);
}
}
}
// Update dead_node_list with any missing dead nodes using useful
// list. Consider all non-useful nodes to be useless i.e., dead nodes.
void Compile::update_dead_node_list(Unique_Node_List &useful) {
uint max_idx = unique();
VectorSet& useful_node_set = useful.member_set();
for (uint node_idx = 0; node_idx < max_idx; node_idx++) {
// If node with index node_idx is not in useful set,
// mark it as dead in dead node list.
if (!useful_node_set.test(node_idx)) {
record_dead_node(node_idx);
}
}
}
void Compile::remove_useless_late_inlines(GrowableArray<CallGenerator*>* inlines, Unique_Node_List &useful) {
int shift = 0;
for (int i = 0; i < inlines->length(); i++) {
CallGenerator* cg = inlines->at(i);
if (useful.member(cg->call_node())) {
if (shift > 0) {
inlines->at_put(i - shift, cg);
}
} else {
shift++; // skip over the dead element
}
}
if (shift > 0) {
inlines->trunc_to(inlines->length() - shift); // remove last elements from compacted array
}
}
void Compile::remove_useless_late_inlines(GrowableArray<CallGenerator*>* inlines, Node* dead) {
assert(dead != NULL && dead->is_Call(), "sanity");
int found = 0;
for (int i = 0; i < inlines->length(); i++) {
if (inlines->at(i)->call_node() == dead) {
inlines->remove_at(i);
found++;
NOT_DEBUG( break; ) // elements are unique, so exit early
}
}
assert(found <= 1, "not unique");
}
void Compile::remove_useless_nodes(GrowableArray<Node*>& node_list, Unique_Node_List& useful) {
for (int i = node_list.length() - 1; i >= 0; i--) {
Node* n = node_list.at(i);
if (!useful.member(n)) {
node_list.delete_at(i); // replaces i-th with last element which is known to be useful (already processed)
}
}
}
void Compile::remove_useless_node(Node* dead) {
remove_modified_node(dead);
// Constant node that has no out-edges and has only one in-edge from
// root is usually dead. However, sometimes reshaping walk makes
// it reachable by adding use edges. So, we will NOT count Con nodes
// as dead to be conservative about the dead node count at any
// given time.
if (!dead->is_Con()) {
record_dead_node(dead->_idx);
}
if (dead->is_macro()) {
remove_macro_node(dead);
}
if (dead->is_expensive()) {
remove_expensive_node(dead);
}
if (dead->Opcode() == Op_Opaque4) {
remove_skeleton_predicate_opaq(dead);
}
if (dead->for_post_loop_opts_igvn()) {
remove_from_post_loop_opts_igvn(dead);
}
if (dead->is_Call()) {
remove_useless_late_inlines( &_late_inlines, dead);
remove_useless_late_inlines( &_string_late_inlines, dead);
remove_useless_late_inlines( &_boxing_late_inlines, dead);
remove_useless_late_inlines(&_vector_reboxing_late_inlines, dead);
}
BarrierSetC2* bs = BarrierSet::barrier_set()->barrier_set_c2();
bs->unregister_potential_barrier_node(dead);
}
// Disconnect all useless nodes by disconnecting those at the boundary.
void Compile::remove_useless_nodes(Unique_Node_List &useful) {
uint next = 0;
while (next < useful.size()) {
Node *n = useful.at(next++);
if (n->is_SafePoint()) {
// We're done with a parsing phase. Replaced nodes are not valid
// beyond that point.
n->as_SafePoint()->delete_replaced_nodes();
}
// Use raw traversal of out edges since this code removes out edges
int max = n->outcnt();
for (int j = 0; j < max; ++j) {
Node* child = n->raw_out(j);
if (!useful.member(child)) {
assert(!child->is_top() || child != top(),
"If top is cached in Compile object it is in useful list");
// Only need to remove this out-edge to the useless node
n->raw_del_out(j);
--j;
--max;
}
}
if (n->outcnt() == 1 && n->has_special_unique_user()) {
record_for_igvn(n->unique_out());
}
}
remove_useless_nodes(_macro_nodes, useful); // remove useless macro and predicate opaq nodes
remove_useless_nodes(_expensive_nodes, useful); // remove useless expensive nodes
remove_useless_nodes(_for_post_loop_igvn, useful); // remove useless node recorded for post loop opts IGVN pass
BarrierSetC2* bs = BarrierSet::barrier_set()->barrier_set_c2();
bs->eliminate_useless_gc_barriers(useful, this);
// clean up the late inline lists
remove_useless_late_inlines( &_late_inlines, useful);
remove_useless_late_inlines( &_string_late_inlines, useful);
remove_useless_late_inlines( &_boxing_late_inlines, useful);
remove_useless_late_inlines(&_vector_reboxing_late_inlines, useful);
debug_only(verify_graph_edges(true/*check for no_dead_code*/);)
}
// ============================================================================
//------------------------------CompileWrapper---------------------------------
class CompileWrapper : public StackObj {
Compile *const _compile;
public:
CompileWrapper(Compile* compile);
~CompileWrapper();
};
CompileWrapper::CompileWrapper(Compile* compile) : _compile(compile) {
// the Compile* pointer is stored in the current ciEnv:
ciEnv* env = compile->env();
assert(env == ciEnv::current(), "must already be a ciEnv active");
assert(env->compiler_data() == NULL, "compile already active?");
env->set_compiler_data(compile);
assert(compile == Compile::current(), "sanity");
compile->set_type_dict(NULL);
compile->set_clone_map(new Dict(cmpkey, hashkey, _compile->comp_arena()));
compile->clone_map().set_clone_idx(0);
compile->set_type_last_size(0);
compile->set_last_tf(NULL, NULL);
compile->set_indexSet_arena(NULL);
compile->set_indexSet_free_block_list(NULL);
compile->init_type_arena();
Type::Initialize(compile);
_compile->begin_method();
_compile->clone_map().set_debug(_compile->has_method() && _compile->directive()->CloneMapDebugOption);
}
CompileWrapper::~CompileWrapper() {
_compile->end_method();
_compile->env()->set_compiler_data(NULL);
}
//----------------------------print_compile_messages---------------------------
void Compile::print_compile_messages() {
#ifndef PRODUCT
// Check if recompiling
if (_subsume_loads == false && PrintOpto) {
// Recompiling without allowing machine instructions to subsume loads
tty->print_cr("*********************************************************");
tty->print_cr("** Bailout: Recompile without subsuming loads **");
tty->print_cr("*********************************************************");
}
if (_do_escape_analysis != DoEscapeAnalysis && PrintOpto) {
// Recompiling without escape analysis
tty->print_cr("*********************************************************");
tty->print_cr("** Bailout: Recompile without escape analysis **");
tty->print_cr("*********************************************************");
}
if (_eliminate_boxing != EliminateAutoBox && PrintOpto) {
// Recompiling without boxing elimination
tty->print_cr("*********************************************************");
tty->print_cr("** Bailout: Recompile without boxing elimination **");
tty->print_cr("*********************************************************");
}
if (env()->break_at_compile()) {
// Open the debugger when compiling this method.
tty->print("### Breaking when compiling: ");
method()->print_short_name();
tty->cr();
BREAKPOINT;
}
if( PrintOpto ) {
if (is_osr_compilation()) {
tty->print("[OSR]%3d", _compile_id);
} else {
tty->print("%3d", _compile_id);
}
}
#endif
}
// ============================================================================
//------------------------------Compile standard-------------------------------
debug_only( int Compile::_debug_idx = 100000; )
// Compile a method. entry_bci is -1 for normal compilations and indicates
// the continuation bci for on stack replacement.
Compile::Compile( ciEnv* ci_env, ciMethod* target, int osr_bci,
bool subsume_loads, bool do_escape_analysis, bool eliminate_boxing, bool install_code, DirectiveSet* directive)
: Phase(Compiler),
_compile_id(ci_env->compile_id()),
_save_argument_registers(false),
_subsume_loads(subsume_loads),
_do_escape_analysis(do_escape_analysis),
_install_code(install_code),
_eliminate_boxing(eliminate_boxing),
_method(target),
_entry_bci(osr_bci),
_stub_function(NULL),
_stub_name(NULL),
_stub_entry_point(NULL),
_max_node_limit(MaxNodeLimit),
_post_loop_opts_phase(false),
_inlining_progress(false),
_inlining_incrementally(false),
_do_cleanup(false),
_has_reserved_stack_access(target->has_reserved_stack_access()),
#ifndef PRODUCT
_igv_idx(0),
_trace_opto_output(directive->TraceOptoOutputOption),
_print_ideal(directive->PrintIdealOption),
#endif
_has_method_handle_invokes(false),
_clinit_barrier_on_entry(false),
_stress_seed(0),
_comp_arena(mtCompiler),
_barrier_set_state(BarrierSet::barrier_set()->barrier_set_c2()->create_barrier_state(comp_arena())),
_env(ci_env),
_directive(directive),
_log(ci_env->log()),
_failure_reason(NULL),
_intrinsics (comp_arena(), 0, 0, NULL),
_macro_nodes (comp_arena(), 8, 0, NULL),
_predicate_opaqs (comp_arena(), 8, 0, NULL),
_skeleton_predicate_opaqs (comp_arena(), 8, 0, NULL),
_expensive_nodes (comp_arena(), 8, 0, NULL),
_for_post_loop_igvn(comp_arena(), 8, 0, NULL),
_congraph(NULL),
NOT_PRODUCT(_printer(NULL) COMMA)
_dead_node_list(comp_arena()),
_dead_node_count(0),
_node_arena(mtCompiler),
_old_arena(mtCompiler),
_mach_constant_base_node(NULL),
_Compile_types(mtCompiler),
_initial_gvn(NULL),
_for_igvn(NULL),
_warm_calls(NULL),
_late_inlines(comp_arena(), 2, 0, NULL),
_string_late_inlines(comp_arena(), 2, 0, NULL),
_boxing_late_inlines(comp_arena(), 2, 0, NULL),
_vector_reboxing_late_inlines(comp_arena(), 2, 0, NULL),
_late_inlines_pos(0),
_number_of_mh_late_inlines(0),
_native_invokers(comp_arena(), 1, 0, NULL),
_print_inlining_stream(NULL),
_print_inlining_list(NULL),
_print_inlining_idx(0),
_print_inlining_output(NULL),
_replay_inline_data(NULL),
_java_calls(0),
_inner_loops(0),
_interpreter_frame_size(0)
#ifndef PRODUCT
, _in_dump_cnt(0)
#endif
{
C = this;
CompileWrapper cw(this);
if (CITimeVerbose) {
tty->print(" ");
target->holder()->name()->print();
tty->print(".");
target->print_short_name();
tty->print(" ");
}
TraceTime t1("Total compilation time", &_t_totalCompilation, CITime, CITimeVerbose);
TraceTime t2(NULL, &_t_methodCompilation, CITime, false);
#if defined(SUPPORT_ASSEMBLY) || defined(SUPPORT_ABSTRACT_ASSEMBLY)
bool print_opto_assembly = directive->PrintOptoAssemblyOption;
// We can always print a disassembly, either abstract (hex dump) or
// with the help of a suitable hsdis library. Thus, we should not
// couple print_assembly and print_opto_assembly controls.
// But: always print opto and regular assembly on compile command 'print'.
bool print_assembly = directive->PrintAssemblyOption;
set_print_assembly(print_opto_assembly || print_assembly);
#else
set_print_assembly(false); // must initialize.
#endif
#ifndef PRODUCT
set_parsed_irreducible_loop(false);
if (directive->ReplayInlineOption) {
_replay_inline_data = ciReplay::load_inline_data(method(), entry_bci(), ci_env->comp_level());
}
#endif
set_print_inlining(directive->PrintInliningOption || PrintOptoInlining);
set_print_intrinsics(directive->PrintIntrinsicsOption);
set_has_irreducible_loop(true); // conservative until build_loop_tree() reset it
if (ProfileTraps RTM_OPT_ONLY( || UseRTMLocking )) {
// Make sure the method being compiled gets its own MDO,
// so we can at least track the decompile_count().
// Need MDO to record RTM code generation state.
method()->ensure_method_data();
}
Init(::AliasLevel);
print_compile_messages();
_ilt = InlineTree::build_inline_tree_root();
// 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);
print_inlining_init();
{ // Scope for timing the parser
TracePhase tp("parse", &timers[_t_parser]);
// Put top into the hash table ASAP.
initial_gvn()->transform_no_reclaim(top());
// Set up tf(), start(), and find a CallGenerator.
CallGenerator* cg = NULL;
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 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 StartNode(root(), tf()->domain());
initial_gvn()->set_type_bottom(s);
init_start(s);
if (method()->intrinsic_id() == vmIntrinsics::_Reference_get) {
// With java.lang.ref.reference.get() we must go through the
// intrinsic - even when get() is the root
// method of the compile - so that, if necessary, the value in
// the referent field of the reference object gets recorded by
// the pre-barrier code.
cg = find_intrinsic(method(), false);
}
if (cg == NULL) {
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("cannot parse method");
return;
}
JVMState* jvms = build_start_state(start(), tf());
if ((jvms = cg->generate(jvms)) == NULL) {
if (!failure_reason_is(C2Compiler::retry_class_loading_during_parsing())) {
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());
}
assert(IncrementalInline || (_late_inlines.length() == 0 && !has_mh_late_inlines()), "incremental inlining is off");
if (_late_inlines.length() == 0 && !has_mh_late_inlines() && !failing() && has_stringbuilder()) {
inline_string_calls(true);
}
if (failing()) return;
print_method(PHASE_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 (should_print(1)) {
_printer->print_inlining();
}
#endif
if (failing()) return;
NOT_PRODUCT( verify_graph_edges(); )
// If any phase is randomized for stress testing, seed random number
// generation and log the seed for repeatability.
if (StressLCM || StressGCM || StressIGVN || StressCCP) {
_stress_seed = FLAG_IS_DEFAULT(StressSeed) ?
static_cast<uint>(Ticks::now().nanoseconds()) : StressSeed;
if (_log != NULL) {
_log->elem("stress_test seed='%u'", _stress_seed);
}
}
// Now optimize
Optimize();
if (failing()) return;
NOT_PRODUCT( verify_graph_edges(); )
#ifndef PRODUCT
if (print_ideal()) {
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
#ifdef ASSERT
BarrierSetC2* bs = BarrierSet::barrier_set()->barrier_set_c2();
bs->verify_gc_barriers(this, BarrierSetC2::BeforeCodeGen);
#endif
// Dump compilation data to replay it.
if (directive->DumpReplayOption) {
env()->dump_replay_data(_compile_id);
}
if (directive->DumpInlineOption && (ilt() != NULL)) {
env()->dump_inline_data(_compile_id);
}
// Now that we know the size of all the monitors we can add a fixed slot
// for the original deopt pc.
int next_slot = fixed_slots() + (sizeof(address) / VMRegImpl::stack_slot_size);
set_fixed_slots(next_slot);
// Compute when to use implicit null checks. Used by matching trap based
// nodes and NullCheck optimization.
set_allowed_deopt_reasons();
// Now generate code
Code_Gen();
}
//------------------------------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,
DirectiveSet* directive)
: Phase(Compiler),
_compile_id(0),
_save_argument_registers(save_arg_registers),
_subsume_loads(true),
_do_escape_analysis(false),
_install_code(true),
_eliminate_boxing(false),
_method(NULL),
_entry_bci(InvocationEntryBci),
_stub_function(stub_function),
_stub_name(stub_name),
_stub_entry_point(NULL),
_max_node_limit(MaxNodeLimit),
_post_loop_opts_phase(false),
_inlining_progress(false),
_inlining_incrementally(false),
_has_reserved_stack_access(false),
#ifndef PRODUCT
_igv_idx(0),
_trace_opto_output(directive->TraceOptoOutputOption),
_print_ideal(directive->PrintIdealOption),
#endif
_has_method_handle_invokes(false),
_clinit_barrier_on_entry(false),
_stress_seed(0),
_comp_arena(mtCompiler),
_barrier_set_state(BarrierSet::barrier_set()->barrier_set_c2()->create_barrier_state(comp_arena())),
_env(ci_env),
_directive(directive),
_log(ci_env->log()),
_failure_reason(NULL),
_congraph(NULL),
NOT_PRODUCT(_printer(NULL) COMMA)
_dead_node_list(comp_arena()),
_dead_node_count(0),
_node_arena(mtCompiler),
_old_arena(mtCompiler),
_mach_constant_base_node(NULL),
_Compile_types(mtCompiler),
_initial_gvn(NULL),
_for_igvn(NULL),
_warm_calls(NULL),
_number_of_mh_late_inlines(0),
_native_invokers(),
_print_inlining_stream(NULL),
_print_inlining_list(NULL),
_print_inlining_idx(0),
_print_inlining_output(NULL),
_replay_inline_data(NULL),
_java_calls(0),
_inner_loops(0),
_interpreter_frame_size(0),
#ifndef PRODUCT
_in_dump_cnt(0),
#endif
_allowed_reasons(0) {
C = this;
TraceTime t1(NULL, &_t_totalCompilation, CITime, false);
TraceTime t2(NULL, &_t_stubCompilation, CITime, false);
#ifndef PRODUCT
set_print_assembly(PrintFrameConverterAssembly);
set_parsed_irreducible_loop(false);
#else
set_print_assembly(false); // Must initialize.
#endif
set_has_irreducible_loop(false); // no loops
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();
}
//------------------------------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
IA32_ONLY( set_24_bit_selection_and_mode(true, false); )
_node_note_array = NULL;
_default_node_notes = NULL;
DEBUG_ONLY( _modified_nodes = NULL; ) // Used in Optimize()
_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 RootNode());
// Now that you have a Root to point to, create the real TOP
set_cached_top_node( new ConNode(Type::TOP) );
set_recent_alloc(NULL, NULL);
// Create Debug Information Recorder to record scopes, oopmaps, etc.
env()->set_oop_recorder(new OopRecorder(env()->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(false); // first approximation
set_has_stringbuilder(false);
set_has_boxed_value(false);
_trap_can_recompile = false; // no traps emitted yet
_major_progress = true; // start out assuming good things will happen
set_has_unsafe_access(false);
set_max_vector_size(0);
set_clear_upper_avx(false); //false as default for clear upper bits of ymm registers
Copy::zero_to_bytes(_trap_hist, sizeof(_trap_hist));
set_decompile_count(0);
set_do_freq_based_layout(_directive->BlockLayoutByFrequencyOption);
_loop_opts_cnt = LoopOptsCount;
set_do_inlining(Inline);
set_max_inline_size(MaxInlineSize);
set_freq_inline_size(FreqInlineSize);
set_do_scheduling(OptoScheduling);
set_do_vector_loop(false);
if (AllowVectorizeOnDemand) {
if (has_method() && (_directive->VectorizeOption || _directive->VectorizeDebugOption)) {
set_do_vector_loop(true);
NOT_PRODUCT(if (do_vector_loop() && Verbose) {tty->print("Compile::Init: do vectorized loops (SIMD like) for method %s\n", method()->name()->as_quoted_ascii());})
} else if (has_method() && method()->name() != 0 &&
method()->intrinsic_id() == vmIntrinsics::_forEachRemaining) {
set_do_vector_loop(true);
}
}
set_use_cmove(UseCMoveUnconditionally /* || do_vector_loop()*/); //TODO: consider do_vector_loop() mandate use_cmove unconditionally
NOT_PRODUCT(if (use_cmove() && Verbose && has_method()) {tty->print("Compile::Init: use CMove without profitability tests for method %s\n", method()->name()->as_quoted_ascii());})