jdk8-mips64-public/hotspot: src/cpu/sparc/vm/c1_LIRGenerator

src/cpu/sparc/vm/c1_LIRGenerator_sparc.cpp@46f6f063b272 (annotated)

src/cpu/sparc/vm/c1_LIRGenerator_sparc.cpp

Thu, 21 Mar 2013 09:27:54 +0100

author: roland
date: Thu, 21 Mar 2013 09:27:54 +0100
changeset 4860: 46f6f063b272
parent 4106: 7eca5de9e0b6
child 5353: b800986664f4
permissions: -rw-r--r--

7153771: array bound check elimination for c1
Summary: when possible optimize out array bound checks, inserting predicates when needed.
Reviewed-by: never, kvn, twisti
Contributed-by: thomaswue <thomas.wuerthinger@oracle.com>

 /*
  * Copyright (c) 2005, 2012, 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 "c1/c1_Compilation.hpp"
 #include "c1/c1_FrameMap.hpp"
 #include "c1/c1_Instruction.hpp"
 #include "c1/c1_LIRAssembler.hpp"
 #include "c1/c1_LIRGenerator.hpp"
 #include "c1/c1_Runtime1.hpp"
 #include "c1/c1_ValueStack.hpp"
 #include "ci/ciArray.hpp"
 #include "ci/ciObjArrayKlass.hpp"
 #include "ci/ciTypeArrayKlass.hpp"
 #include "runtime/sharedRuntime.hpp"
 #include "runtime/stubRoutines.hpp"
 #include "vmreg_sparc.inline.hpp"
 #ifdef ASSERT
 #define __ gen()->lir(__FILE__, __LINE__)->
 #else
 #define __ gen()->lir()->
 #endif
 void LIRItem::load_byte_item() {
   // byte loads use same registers as other loads
   load_item();
 }
 void LIRItem::load_nonconstant() {
   LIR_Opr r = value()->operand();
   if (_gen->can_inline_as_constant(value())) {
     if (!r->is_constant()) {
       r = LIR_OprFact::value_type(value()->type());
     }
     _result = r;
   } else {
     load_item();
   }
 }
 //--------------------------------------------------------------
 //               LIRGenerator
 //--------------------------------------------------------------
 LIR_Opr LIRGenerator::exceptionOopOpr()              { return FrameMap::Oexception_opr;  }
 LIR_Opr LIRGenerator::exceptionPcOpr()               { return FrameMap::Oissuing_pc_opr; }
 LIR_Opr LIRGenerator::syncTempOpr()                  { return new_register(T_OBJECT); }
 LIR_Opr LIRGenerator::getThreadTemp()                { return rlock_callee_saved(T_INT); }
 LIR_Opr LIRGenerator::result_register_for(ValueType* type, bool callee) {
   LIR_Opr opr;
   switch (type->tag()) {
   case intTag:     opr = callee ? FrameMap::I0_opr      : FrameMap::O0_opr;       break;
   case objectTag:  opr = callee ? FrameMap::I0_oop_opr  : FrameMap::O0_oop_opr;   break;
   case longTag:    opr = callee ? FrameMap::in_long_opr : FrameMap::out_long_opr; break;
   case floatTag:   opr = FrameMap::F0_opr;                                        break;
   case doubleTag:  opr = FrameMap::F0_double_opr;                                 break;
   case addressTag:
   default: ShouldNotReachHere(); return LIR_OprFact::illegalOpr;
   }
   assert(opr->type_field() == as_OprType(as_BasicType(type)), "type mismatch");
   return opr;
 }
 LIR_Opr LIRGenerator::rlock_callee_saved(BasicType type) {
   LIR_Opr reg = new_register(type);
   set_vreg_flag(reg, callee_saved);
   return reg;
 }
 LIR_Opr LIRGenerator::rlock_byte(BasicType type) {
   return new_register(T_INT);
 }
 //--------- loading items into registers --------------------------------
 // SPARC cannot inline all constants
 bool LIRGenerator::can_store_as_constant(Value v, BasicType type) const {
   if (v->type()->as_IntConstant() != NULL) {
     return v->type()->as_IntConstant()->value() == 0;
   } else if (v->type()->as_LongConstant() != NULL) {
     return v->type()->as_LongConstant()->value() == 0L;
   } else if (v->type()->as_ObjectConstant() != NULL) {
     return v->type()->as_ObjectConstant()->value()->is_null_object();
   } else {
     return false;
   }
 }
 // only simm13 constants can be inlined
 bool LIRGenerator:: can_inline_as_constant(Value i) const {
   if (i->type()->as_IntConstant() != NULL) {
     return Assembler::is_simm13(i->type()->as_IntConstant()->value());
   } else {
     return can_store_as_constant(i, as_BasicType(i->type()));
   }
 }
 bool LIRGenerator:: can_inline_as_constant(LIR_Const* c) const {
   if (c->type() == T_INT) {
     return Assembler::is_simm13(c->as_jint());
   }
   return false;
 }
 LIR_Opr LIRGenerator::safepoint_poll_register() {
   return new_register(T_INT);
 }
 LIR_Address* LIRGenerator::generate_address(LIR_Opr base, LIR_Opr index,
                                             int shift, int disp, BasicType type) {
   assert(base->is_register(), "must be");
   // accumulate fixed displacements
   if (index->is_constant()) {
     disp += index->as_constant_ptr()->as_jint() << shift;
     index = LIR_OprFact::illegalOpr;
   }
   if (index->is_register()) {
     // apply the shift and accumulate the displacement
     if (shift > 0) {
       LIR_Opr tmp = new_pointer_register();
       __ shift_left(index, shift, tmp);
       index = tmp;
     }
     if (disp != 0) {
       LIR_Opr tmp = new_pointer_register();
       if (Assembler::is_simm13(disp)) {
         __ add(tmp, LIR_OprFact::intptrConst(disp), tmp);
         index = tmp;
       } else {
         __ move(LIR_OprFact::intptrConst(disp), tmp);
         __ add(tmp, index, tmp);
         index = tmp;
       }
       disp = 0;
     }
   } else if (disp != 0 && !Assembler::is_simm13(disp)) {
     // index is illegal so replace it with the displacement loaded into a register
     index = new_pointer_register();
     __ move(LIR_OprFact::intptrConst(disp), index);
     disp = 0;
   }
   // at this point we either have base + index or base + displacement
   if (disp == 0) {
     return new LIR_Address(base, index, type);
   } else {
     assert(Assembler::is_simm13(disp), "must be");
     return new LIR_Address(base, disp, type);
   }
 }
 LIR_Address* LIRGenerator::emit_array_address(LIR_Opr array_opr, LIR_Opr index_opr,
                                               BasicType type, bool needs_card_mark) {
   int elem_size = type2aelembytes(type);
   int shift = exact_log2(elem_size);
   LIR_Opr base_opr;
   int offset = arrayOopDesc::base_offset_in_bytes(type);
   if (index_opr->is_constant()) {
     int i = index_opr->as_constant_ptr()->as_jint();
     int array_offset = i * elem_size;
     if (Assembler::is_simm13(array_offset + offset)) {
       base_opr = array_opr;
       offset = array_offset + offset;
     } else {
       base_opr = new_pointer_register();
       if (Assembler::is_simm13(array_offset)) {
         __ add(array_opr, LIR_OprFact::intptrConst(array_offset), base_opr);
       } else {
         __ move(LIR_OprFact::intptrConst(array_offset), base_opr);
         __ add(base_opr, array_opr, base_opr);
       }
     }
   } else {
 #ifdef _LP64
     if (index_opr->type() == T_INT) {
       LIR_Opr tmp = new_register(T_LONG);
       __ convert(Bytecodes::_i2l, index_opr, tmp);
       index_opr = tmp;
     }
 #endif
     base_opr = new_pointer_register();
     assert (index_opr->is_register(), "Must be register");
     if (shift > 0) {
       __ shift_left(index_opr, shift, base_opr);
       __ add(base_opr, array_opr, base_opr);
     } else {
       __ add(index_opr, array_opr, base_opr);
     }
   }
   if (needs_card_mark) {
     LIR_Opr ptr = new_pointer_register();
     __ add(base_opr, LIR_OprFact::intptrConst(offset), ptr);
     return new LIR_Address(ptr, type);
   } else {
     return new LIR_Address(base_opr, offset, type);
   }
 }
 LIR_Opr LIRGenerator::load_immediate(int x, BasicType type) {
   LIR_Opr r;
   if (type == T_LONG) {
     r = LIR_OprFact::longConst(x);
   } else if (type == T_INT) {
     r = LIR_OprFact::intConst(x);
   } else {
     ShouldNotReachHere();
   }
   if (!Assembler::is_simm13(x)) {
     LIR_Opr tmp = new_register(type);
     __ move(r, tmp);
     return tmp;
   }
   return r;
 }
 void LIRGenerator::increment_counter(address counter, BasicType type, int step) {
   LIR_Opr pointer = new_pointer_register();
   __ move(LIR_OprFact::intptrConst(counter), pointer);
   LIR_Address* addr = new LIR_Address(pointer, type);
   increment_counter(addr, step);
 }
 void LIRGenerator::increment_counter(LIR_Address* addr, int step) {
   LIR_Opr temp = new_register(addr->type());
   __ move(addr, temp);
   __ add(temp, load_immediate(step, addr->type()), temp);
   __ move(temp, addr);
 }
 void LIRGenerator::cmp_mem_int(LIR_Condition condition, LIR_Opr base, int disp, int c, CodeEmitInfo* info) {
   LIR_Opr o7opr = FrameMap::O7_opr;
   __ load(new LIR_Address(base, disp, T_INT), o7opr, info);
   __ cmp(condition, o7opr, c);
 }
 void LIRGenerator::cmp_reg_mem(LIR_Condition condition, LIR_Opr reg, LIR_Opr base, int disp, BasicType type, CodeEmitInfo* info) {
   LIR_Opr o7opr = FrameMap::O7_opr;
   __ load(new LIR_Address(base, disp, type), o7opr, info);
   __ cmp(condition, reg, o7opr);
 }
 void LIRGenerator::cmp_reg_mem(LIR_Condition condition, LIR_Opr reg, LIR_Opr base, LIR_Opr disp, BasicType type, CodeEmitInfo* info) {
   LIR_Opr o7opr = FrameMap::O7_opr;
   __ load(new LIR_Address(base, disp, type), o7opr, info);
   __ cmp(condition, reg, o7opr);
 }
 bool LIRGenerator::strength_reduce_multiply(LIR_Opr left, int c, LIR_Opr result, LIR_Opr tmp) {
   assert(left != result, "should be different registers");
   if (is_power_of_2(c + 1)) {
     __ shift_left(left, log2_intptr(c + 1), result);
     __ sub(result, left, result);
     return true;
   } else if (is_power_of_2(c - 1)) {
     __ shift_left(left, log2_intptr(c - 1), result);
     __ add(result, left, result);
     return true;
   }
   return false;
 }
 void LIRGenerator::store_stack_parameter (LIR_Opr item, ByteSize offset_from_sp) {
   BasicType t = item->type();
   LIR_Opr sp_opr = FrameMap::SP_opr;
   if ((t == T_LONG || t == T_DOUBLE) &&
       ((in_bytes(offset_from_sp) - STACK_BIAS) % 8 != 0)) {
     __ unaligned_move(item, new LIR_Address(sp_opr, in_bytes(offset_from_sp), t));
   } else {
     __ move(item, new LIR_Address(sp_opr, in_bytes(offset_from_sp), t));
   }
 }
 //----------------------------------------------------------------------
 //             visitor functions
 //----------------------------------------------------------------------
 void LIRGenerator::do_StoreIndexed(StoreIndexed* x) {
   assert(x->is_pinned(),"");
   bool needs_range_check = x->compute_needs_range_check();
   bool use_length = x->length() != NULL;
   bool obj_store = x->elt_type() == T_ARRAY || x->elt_type() == T_OBJECT;
   bool needs_store_check = obj_store && (x->value()->as_Constant() == NULL ||
                                          !get_jobject_constant(x->value())->is_null_object() ||
                                          x->should_profile());
   LIRItem array(x->array(), this);
   LIRItem index(x->index(), this);
   LIRItem value(x->value(), this);
   LIRItem length(this);
   array.load_item();
   index.load_nonconstant();
   if (use_length && needs_range_check) {
     length.set_instruction(x->length());
     length.load_item();
   }
   if (needs_store_check) {
     value.load_item();
   } else {
     value.load_for_store(x->elt_type());
   }
   set_no_result(x);
   // the CodeEmitInfo must be duplicated for each different
   // LIR-instruction because spilling can occur anywhere between two
   // instructions and so the debug information must be different
   CodeEmitInfo* range_check_info = state_for(x);
   CodeEmitInfo* null_check_info = NULL;
   if (x->needs_null_check()) {
     null_check_info = new CodeEmitInfo(range_check_info);
   }
   // emit array address setup early so it schedules better
   LIR_Address* array_addr = emit_array_address(array.result(), index.result(), x->elt_type(), obj_store);
   if (GenerateRangeChecks && needs_range_check) {
     if (use_length) {
       __ cmp(lir_cond_belowEqual, length.result(), index.result());
       __ branch(lir_cond_belowEqual, T_INT, new RangeCheckStub(range_check_info, index.result()));
     } else {
       array_range_check(array.result(), index.result(), null_check_info, range_check_info);
       // range_check also does the null check
       null_check_info = NULL;
     }
   }
   if (GenerateArrayStoreCheck && needs_store_check) {
     LIR_Opr tmp1 = FrameMap::G1_opr;
     LIR_Opr tmp2 = FrameMap::G3_opr;
     LIR_Opr tmp3 = FrameMap::G5_opr;
     CodeEmitInfo* store_check_info = new CodeEmitInfo(range_check_info);
     __ store_check(value.result(), array.result(), tmp1, tmp2, tmp3, store_check_info, x->profiled_method(), x->profiled_bci());
   }
   if (obj_store) {
     // Needs GC write barriers.
     pre_barrier(LIR_OprFact::address(array_addr), LIR_OprFact::illegalOpr /* pre_val */,
                 true /* do_load */, false /* patch */, NULL);
   }
   __ move(value.result(), array_addr, null_check_info);
   if (obj_store) {
     // Precise card mark
     post_barrier(LIR_OprFact::address(array_addr), value.result());
   }
 }
 void LIRGenerator::do_MonitorEnter(MonitorEnter* x) {
   assert(x->is_pinned(),"");
   LIRItem obj(x->obj(), this);
   obj.load_item();
   set_no_result(x);
   LIR_Opr lock    = FrameMap::G1_opr;
   LIR_Opr scratch = FrameMap::G3_opr;
   LIR_Opr hdr     = FrameMap::G4_opr;
   CodeEmitInfo* info_for_exception = NULL;
   if (x->needs_null_check()) {
     info_for_exception = state_for(x);
   }
   // this CodeEmitInfo must not have the xhandlers because here the
   // object is already locked (xhandlers expects object to be unlocked)
   CodeEmitInfo* info = state_for(x, x->state(), true);
   monitor_enter(obj.result(), lock, hdr, scratch, x->monitor_no(), info_for_exception, info);
 }
 void LIRGenerator::do_MonitorExit(MonitorExit* x) {
   assert(x->is_pinned(),"");
   LIRItem obj(x->obj(), this);
   obj.dont_load_item();
   set_no_result(x);
   LIR_Opr lock      = FrameMap::G1_opr;
   LIR_Opr hdr       = FrameMap::G3_opr;
   LIR_Opr obj_temp  = FrameMap::G4_opr;
   monitor_exit(obj_temp, lock, hdr, LIR_OprFact::illegalOpr, x->monitor_no());
 }
 // _ineg, _lneg, _fneg, _dneg
 void LIRGenerator::do_NegateOp(NegateOp* x) {
   LIRItem value(x->x(), this);
   value.load_item();
   LIR_Opr reg = rlock_result(x);
   __ negate(value.result(), reg);
 }
 // for  _fadd, _fmul, _fsub, _fdiv, _frem
 //      _dadd, _dmul, _dsub, _ddiv, _drem
 void LIRGenerator::do_ArithmeticOp_FPU(ArithmeticOp* x) {
   switch (x->op()) {
   case Bytecodes::_fadd:
   case Bytecodes::_fmul:
   case Bytecodes::_fsub:
   case Bytecodes::_fdiv:
   case Bytecodes::_dadd:
   case Bytecodes::_dmul:
   case Bytecodes::_dsub:
   case Bytecodes::_ddiv: {
     LIRItem left(x->x(), this);
     LIRItem right(x->y(), this);
     left.load_item();
     right.load_item();
     rlock_result(x);
     arithmetic_op_fpu(x->op(), x->operand(), left.result(), right.result(), x->is_strictfp());
   }
   break;
   case Bytecodes::_frem:
   case Bytecodes::_drem: {
     address entry;
     switch (x->op()) {
     case Bytecodes::_frem:
       entry = CAST_FROM_FN_PTR(address, SharedRuntime::frem);
       break;
     case Bytecodes::_drem:
       entry = CAST_FROM_FN_PTR(address, SharedRuntime::drem);
       break;
     default:
       ShouldNotReachHere();
     }
     LIR_Opr result = call_runtime(x->x(), x->y(), entry, x->type(), NULL);
     set_result(x, result);
   }
   break;
   default: ShouldNotReachHere();
   }
 }
 // for  _ladd, _lmul, _lsub, _ldiv, _lrem
 void LIRGenerator::do_ArithmeticOp_Long(ArithmeticOp* x) {
   switch (x->op()) {
   case Bytecodes::_lrem:
   case Bytecodes::_lmul:
   case Bytecodes::_ldiv: {
     if (x->op() == Bytecodes::_ldiv || x->op() == Bytecodes::_lrem) {
       LIRItem right(x->y(), this);
       right.load_item();
       CodeEmitInfo* info = state_for(x);
       LIR_Opr item = right.result();
       assert(item->is_register(), "must be");
       __ cmp(lir_cond_equal, item, LIR_OprFact::longConst(0));
       __ branch(lir_cond_equal, T_LONG, new DivByZeroStub(info));
     }
     address entry;
     switch (x->op()) {
     case Bytecodes::_lrem:
       entry = CAST_FROM_FN_PTR(address, SharedRuntime::lrem);
       break; // check if dividend is 0 is done elsewhere
     case Bytecodes::_ldiv:
       entry = CAST_FROM_FN_PTR(address, SharedRuntime::ldiv);
       break; // check if dividend is 0 is done elsewhere
     case Bytecodes::_lmul:
       entry = CAST_FROM_FN_PTR(address, SharedRuntime::lmul);
       break;
     default:
       ShouldNotReachHere();
     }
     // order of arguments to runtime call is reversed.
     LIR_Opr result = call_runtime(x->y(), x->x(), entry, x->type(), NULL);
     set_result(x, result);
     break;
   }
   case Bytecodes::_ladd:
   case Bytecodes::_lsub: {
     LIRItem left(x->x(), this);
     LIRItem right(x->y(), this);
     left.load_item();
     right.load_item();
     rlock_result(x);
     arithmetic_op_long(x->op(), x->operand(), left.result(), right.result(), NULL);
     break;
   }
   default: ShouldNotReachHere();
   }
 }
 // Returns if item is an int constant that can be represented by a simm13
 static bool is_simm13(LIR_Opr item) {
   if (item->is_constant() && item->type() == T_INT) {
     return Assembler::is_simm13(item->as_constant_ptr()->as_jint());
   } else {
     return false;
   }
 }
 // for: _iadd, _imul, _isub, _idiv, _irem
 void LIRGenerator::do_ArithmeticOp_Int(ArithmeticOp* x) {
   bool is_div_rem = x->op() == Bytecodes::_idiv || x->op() == Bytecodes::_irem;
   LIRItem left(x->x(), this);
   LIRItem right(x->y(), this);
   // missing test if instr is commutative and if we should swap
   right.load_nonconstant();
   assert(right.is_constant() || right.is_register(), "wrong state of right");
   left.load_item();
   rlock_result(x);
   if (is_div_rem) {
     CodeEmitInfo* info = state_for(x);
     LIR_Opr tmp = FrameMap::G1_opr;
     if (x->op() == Bytecodes::_irem) {
       __ irem(left.result(), right.result(), x->operand(), tmp, info);
     } else if (x->op() == Bytecodes::_idiv) {
       __ idiv(left.result(), right.result(), x->operand(), tmp, info);
     }
   } else {
     arithmetic_op_int(x->op(), x->operand(), left.result(), right.result(), FrameMap::G1_opr);
   }
 }
 void LIRGenerator::do_ArithmeticOp(ArithmeticOp* x) {
   ValueTag tag = x->type()->tag();
   assert(x->x()->type()->tag() == tag && x->y()->type()->tag() == tag, "wrong parameters");
   switch (tag) {
     case floatTag:
     case doubleTag:  do_ArithmeticOp_FPU(x);  return;
     case longTag:    do_ArithmeticOp_Long(x); return;
     case intTag:     do_ArithmeticOp_Int(x);  return;
   }
   ShouldNotReachHere();
 }
 // _ishl, _lshl, _ishr, _lshr, _iushr, _lushr
 void LIRGenerator::do_ShiftOp(ShiftOp* x) {
   LIRItem value(x->x(), this);
   LIRItem count(x->y(), this);
   // Long shift destroys count register
   if (value.type()->is_long()) {
     count.set_destroys_register();
   }
   value.load_item();
   // the old backend doesn't support this
   if (count.is_constant() && count.type()->as_IntConstant() != NULL && value.type()->is_int()) {
     jint c = count.get_jint_constant() & 0x1f;
     assert(c >= 0 && c < 32, "should be small");
     count.dont_load_item();
   } else {
     count.load_item();
   }
   LIR_Opr reg = rlock_result(x);
   shift_op(x->op(), reg, value.result(), count.result(), LIR_OprFact::illegalOpr);
 }
 // _iand, _land, _ior, _lor, _ixor, _lxor
 void LIRGenerator::do_LogicOp(LogicOp* x) {
   LIRItem left(x->x(), this);
   LIRItem right(x->y(), this);
   left.load_item();
   right.load_nonconstant();
   LIR_Opr reg = rlock_result(x);
   logic_op(x->op(), reg, left.result(), right.result());
 }
 // _lcmp, _fcmpl, _fcmpg, _dcmpl, _dcmpg
 void LIRGenerator::do_CompareOp(CompareOp* x) {
   LIRItem left(x->x(), this);
   LIRItem right(x->y(), this);
   left.load_item();
   right.load_item();
   LIR_Opr reg = rlock_result(x);
   if (x->x()->type()->is_float_kind()) {
     Bytecodes::Code code = x->op();
     __ fcmp2int(left.result(), right.result(), reg, (code == Bytecodes::_fcmpl || code == Bytecodes::_dcmpl));
   } else if (x->x()->type()->tag() == longTag) {
     __ lcmp2int(left.result(), right.result(), reg);
   } else {
     Unimplemented();
   }
 }
 void LIRGenerator::do_CompareAndSwap(Intrinsic* x, ValueType* type) {
   assert(x->number_of_arguments() == 4, "wrong type");
   LIRItem obj   (x->argument_at(0), this);  // object
   LIRItem offset(x->argument_at(1), this);  // offset of field
   LIRItem cmp   (x->argument_at(2), this);  // value to compare with field
   LIRItem val   (x->argument_at(3), this);  // replace field with val if matches cmp
   // Use temps to avoid kills
   LIR_Opr t1 = FrameMap::G1_opr;
   LIR_Opr t2 = FrameMap::G3_opr;
   LIR_Opr addr = new_pointer_register();
   // get address of field
   obj.load_item();
   offset.load_item();
   cmp.load_item();
   val.load_item();
   __ add(obj.result(), offset.result(), addr);
   if (type == objectType) {  // Write-barrier needed for Object fields.
     pre_barrier(addr, LIR_OprFact::illegalOpr /* pre_val */,
                 true /* do_load */, false /* patch */, NULL);
   }
   if (type == objectType)
     __ cas_obj(addr, cmp.result(), val.result(), t1, t2);
   else if (type == intType)
     __ cas_int(addr, cmp.result(), val.result(), t1, t2);
   else if (type == longType)
     __ cas_long(addr, cmp.result(), val.result(), t1, t2);
   else {
     ShouldNotReachHere();
   }
   // generate conditional move of boolean result
   LIR_Opr result = rlock_result(x);
   __ cmove(lir_cond_equal, LIR_OprFact::intConst(1), LIR_OprFact::intConst(0),
            result, as_BasicType(type));
   if (type == objectType) {  // Write-barrier needed for Object fields.
     // Precise card mark since could either be object or array
     post_barrier(addr, val.result());
   }
 }
 void LIRGenerator::do_MathIntrinsic(Intrinsic* x) {
   switch (x->id()) {
     case vmIntrinsics::_dabs:
     case vmIntrinsics::_dsqrt: {
       assert(x->number_of_arguments() == 1, "wrong type");
       LIRItem value(x->argument_at(0), this);
       value.load_item();
       LIR_Opr dst = rlock_result(x);
       switch (x->id()) {
       case vmIntrinsics::_dsqrt: {
         __ sqrt(value.result(), dst, LIR_OprFact::illegalOpr);
         break;
       }
       case vmIntrinsics::_dabs: {
         __ abs(value.result(), dst, LIR_OprFact::illegalOpr);
         break;
       }
       }
       break;
     }
     case vmIntrinsics::_dlog10: // fall through
     case vmIntrinsics::_dlog: // fall through
     case vmIntrinsics::_dsin: // fall through
     case vmIntrinsics::_dtan: // fall through
     case vmIntrinsics::_dcos: // fall through
     case vmIntrinsics::_dexp: {
       assert(x->number_of_arguments() == 1, "wrong type");
       address runtime_entry = NULL;
       switch (x->id()) {
       case vmIntrinsics::_dsin:
         runtime_entry = CAST_FROM_FN_PTR(address, SharedRuntime::dsin);
         break;
       case vmIntrinsics::_dcos:
         runtime_entry = CAST_FROM_FN_PTR(address, SharedRuntime::dcos);
         break;
       case vmIntrinsics::_dtan:
         runtime_entry = CAST_FROM_FN_PTR(address, SharedRuntime::dtan);
         break;
       case vmIntrinsics::_dlog:
         runtime_entry = CAST_FROM_FN_PTR(address, SharedRuntime::dlog);
         break;
       case vmIntrinsics::_dlog10:
         runtime_entry = CAST_FROM_FN_PTR(address, SharedRuntime::dlog10);
         break;
       case vmIntrinsics::_dexp:
         runtime_entry = CAST_FROM_FN_PTR(address, SharedRuntime::dexp);
         break;
       default:
         ShouldNotReachHere();
       }
       LIR_Opr result = call_runtime(x->argument_at(0), runtime_entry, x->type(), NULL);
       set_result(x, result);
       break;
     }
     case vmIntrinsics::_dpow: {
       assert(x->number_of_arguments() == 2, "wrong type");
       address runtime_entry = CAST_FROM_FN_PTR(address, SharedRuntime::dpow);
       LIR_Opr result = call_runtime(x->argument_at(0), x->argument_at(1), runtime_entry, x->type(), NULL);
       set_result(x, result);
       break;
     }
   }
 }
 void LIRGenerator::do_ArrayCopy(Intrinsic* x) {
   assert(x->number_of_arguments() == 5, "wrong type");
   // Make all state_for calls early since they can emit code
   CodeEmitInfo* info = state_for(x, x->state());
   // Note: spill caller save before setting the item
   LIRItem src     (x->argument_at(0), this);
   LIRItem src_pos (x->argument_at(1), this);
   LIRItem dst     (x->argument_at(2), this);
   LIRItem dst_pos (x->argument_at(3), this);
   LIRItem length  (x->argument_at(4), this);
   // load all values in callee_save_registers, as this makes the
   // parameter passing to the fast case simpler
   src.load_item_force     (rlock_callee_saved(T_OBJECT));
   src_pos.load_item_force (rlock_callee_saved(T_INT));
   dst.load_item_force     (rlock_callee_saved(T_OBJECT));
   dst_pos.load_item_force (rlock_callee_saved(T_INT));
   length.load_item_force  (rlock_callee_saved(T_INT));
   int flags;
   ciArrayKlass* expected_type;
   arraycopy_helper(x, &flags, &expected_type);
   __ arraycopy(src.result(), src_pos.result(), dst.result(), dst_pos.result(),
                length.result(), rlock_callee_saved(T_INT),
                expected_type, flags, info);
   set_no_result(x);
 }
 // _i2l, _i2f, _i2d, _l2i, _l2f, _l2d, _f2i, _f2l, _f2d, _d2i, _d2l, _d2f
 // _i2b, _i2c, _i2s
 void LIRGenerator::do_Convert(Convert* x) {
   switch (x->op()) {
     case Bytecodes::_f2l:
     case Bytecodes::_d2l:
     case Bytecodes::_d2i:
     case Bytecodes::_l2f:
     case Bytecodes::_l2d: {
       address entry;
       switch (x->op()) {
       case Bytecodes::_l2f:
         entry = CAST_FROM_FN_PTR(address, SharedRuntime::l2f);
         break;
       case Bytecodes::_l2d:
         entry = CAST_FROM_FN_PTR(address, SharedRuntime::l2d);
         break;
       case Bytecodes::_f2l:
         entry = CAST_FROM_FN_PTR(address, SharedRuntime::f2l);
         break;
       case Bytecodes::_d2l:
         entry = CAST_FROM_FN_PTR(address, SharedRuntime::d2l);
         break;
       case Bytecodes::_d2i:
         entry = CAST_FROM_FN_PTR(address, SharedRuntime::d2i);
         break;
       default:
         ShouldNotReachHere();
       }
       LIR_Opr result = call_runtime(x->value(), entry, x->type(), NULL);
       set_result(x, result);
       break;
     }
     case Bytecodes::_i2f:
     case Bytecodes::_i2d: {
       LIRItem value(x->value(), this);
       LIR_Opr reg = rlock_result(x);
       // To convert an int to double, we need to load the 32-bit int
       // from memory into a single precision floating point register
       // (even numbered). Then the sparc fitod instruction takes care
       // of the conversion. This is a bit ugly, but is the best way to
       // get the int value in a single precision floating point register
       value.load_item();
       LIR_Opr tmp = force_to_spill(value.result(), T_FLOAT);
       __ convert(x->op(), tmp, reg);
       break;
     }
     break;
     case Bytecodes::_i2l:
     case Bytecodes::_i2b:
     case Bytecodes::_i2c:
     case Bytecodes::_i2s:
     case Bytecodes::_l2i:
     case Bytecodes::_f2d:
     case Bytecodes::_d2f: { // inline code
       LIRItem value(x->value(), this);
       value.load_item();
       LIR_Opr reg = rlock_result(x);
       __ convert(x->op(), value.result(), reg, false);
     }
     break;
     case Bytecodes::_f2i: {
       LIRItem value (x->value(), this);
       value.set_destroys_register();
       value.load_item();
       LIR_Opr reg = rlock_result(x);
       set_vreg_flag(reg, must_start_in_memory);
       __ convert(x->op(), value.result(), reg, false);
     }
     break;
     default: ShouldNotReachHere();
   }
 }
 void LIRGenerator::do_NewInstance(NewInstance* x) {
   // This instruction can be deoptimized in the slow path : use
   // O0 as result register.
   const LIR_Opr reg = result_register_for(x->type());
 #ifndef PRODUCT
   if (PrintNotLoaded && !x->klass()->is_loaded()) {
     tty->print_cr("   ###class not loaded at new bci %d", x->printable_bci());
   }
 #endif
   CodeEmitInfo* info = state_for(x, x->state());
   LIR_Opr tmp1 = FrameMap::G1_oop_opr;
   LIR_Opr tmp2 = FrameMap::G3_oop_opr;
   LIR_Opr tmp3 = FrameMap::G4_oop_opr;
   LIR_Opr tmp4 = FrameMap::O1_oop_opr;
   LIR_Opr klass_reg = FrameMap::G5_metadata_opr;
   new_instance(reg, x->klass(), tmp1, tmp2, tmp3, tmp4, klass_reg, info);
   LIR_Opr result = rlock_result(x);
   __ move(reg, result);
 }
 void LIRGenerator::do_NewTypeArray(NewTypeArray* x) {
   // Evaluate state_for early since it may emit code
   CodeEmitInfo* info = state_for(x, x->state());
   LIRItem length(x->length(), this);
   length.load_item();
   LIR_Opr reg = result_register_for(x->type());
   LIR_Opr tmp1 = FrameMap::G1_oop_opr;
   LIR_Opr tmp2 = FrameMap::G3_oop_opr;
   LIR_Opr tmp3 = FrameMap::G4_oop_opr;
   LIR_Opr tmp4 = FrameMap::O1_oop_opr;
   LIR_Opr klass_reg = FrameMap::G5_metadata_opr;
   LIR_Opr len = length.result();
   BasicType elem_type = x->elt_type();
   __ metadata2reg(ciTypeArrayKlass::make(elem_type)->constant_encoding(), klass_reg);
   CodeStub* slow_path = new NewTypeArrayStub(klass_reg, len, reg, info);
   __ allocate_array(reg, len, tmp1, tmp2, tmp3, tmp4, elem_type, klass_reg, slow_path);
   LIR_Opr result = rlock_result(x);
   __ move(reg, result);
 }
 void LIRGenerator::do_NewObjectArray(NewObjectArray* x) {
   // Evaluate state_for early since it may emit code.
   CodeEmitInfo* info = state_for(x, x->state());
   // in case of patching (i.e., object class is not yet loaded), we need to reexecute the instruction
   // and therefore provide the state before the parameters have been consumed
   CodeEmitInfo* patching_info = NULL;
   if (!x->klass()->is_loaded() || PatchALot) {
     patching_info = state_for(x, x->state_before());
   }
   LIRItem length(x->length(), this);
   length.load_item();
   const LIR_Opr reg = result_register_for(x->type());
   LIR_Opr tmp1 = FrameMap::G1_oop_opr;
   LIR_Opr tmp2 = FrameMap::G3_oop_opr;
   LIR_Opr tmp3 = FrameMap::G4_oop_opr;
   LIR_Opr tmp4 = FrameMap::O1_oop_opr;
   LIR_Opr klass_reg = FrameMap::G5_metadata_opr;
   LIR_Opr len = length.result();
   CodeStub* slow_path = new NewObjectArrayStub(klass_reg, len, reg, info);
   ciMetadata* obj = ciObjArrayKlass::make(x->klass());
   if (obj == ciEnv::unloaded_ciobjarrayklass()) {
     BAILOUT("encountered unloaded_ciobjarrayklass due to out of memory error");
   }
   klass2reg_with_patching(klass_reg, obj, patching_info);
   __ allocate_array(reg, len, tmp1, tmp2, tmp3, tmp4, T_OBJECT, klass_reg, slow_path);
   LIR_Opr result = rlock_result(x);
   __ move(reg, result);
 }
 void LIRGenerator::do_NewMultiArray(NewMultiArray* x) {
   Values* dims = x->dims();
   int i = dims->length();
   LIRItemList* items = new LIRItemList(dims->length(), NULL);
   while (i-- > 0) {
     LIRItem* size = new LIRItem(dims->at(i), this);
     items->at_put(i, size);
   }
   // Evaluate state_for early since it may emit code.
   CodeEmitInfo* patching_info = NULL;
   if (!x->klass()->is_loaded() || PatchALot) {
     patching_info = state_for(x, x->state_before());
     // Cannot re-use same xhandlers for multiple CodeEmitInfos, so
     // clone all handlers (NOTE: Usually this is handled transparently
     // by the CodeEmitInfo cloning logic in CodeStub constructors but
     // is done explicitly here because a stub isn't being used).
     x->set_exception_handlers(new XHandlers(x->exception_handlers()));
   }
   CodeEmitInfo* info = state_for(x, x->state());
   i = dims->length();
   while (i-- > 0) {
     LIRItem* size = items->at(i);
     size->load_item();
     store_stack_parameter (size->result(),
                            in_ByteSize(STACK_BIAS +
                                        frame::memory_parameter_word_sp_offset * wordSize +
                                        i * sizeof(jint)));
   }
   // This instruction can be deoptimized in the slow path : use
   // O0 as result register.
   const LIR_Opr klass_reg = FrameMap::O0_metadata_opr;
   klass2reg_with_patching(klass_reg, x->klass(), patching_info);
   LIR_Opr rank = FrameMap::O1_opr;
   __ move(LIR_OprFact::intConst(x->rank()), rank);
   LIR_Opr varargs = FrameMap::as_pointer_opr(O2);
   int offset_from_sp = (frame::memory_parameter_word_sp_offset * wordSize) + STACK_BIAS;
   __ add(FrameMap::SP_opr,
          LIR_OprFact::intptrConst(offset_from_sp),
          varargs);
   LIR_OprList* args = new LIR_OprList(3);
   args->append(klass_reg);
   args->append(rank);
   args->append(varargs);
   const LIR_Opr reg = result_register_for(x->type());
   __ call_runtime(Runtime1::entry_for(Runtime1::new_multi_array_id),
                   LIR_OprFact::illegalOpr,
                   reg, args, info);
   LIR_Opr result = rlock_result(x);
   __ move(reg, result);
 }
 void LIRGenerator::do_BlockBegin(BlockBegin* x) {
 }
 void LIRGenerator::do_CheckCast(CheckCast* x) {
   LIRItem obj(x->obj(), this);
   CodeEmitInfo* patching_info = NULL;
   if (!x->klass()->is_loaded() || (PatchALot && !x->is_incompatible_class_change_check())) {
     // must do this before locking the destination register as an oop register,
     // and before the obj is loaded (so x->obj()->item() is valid for creating a debug info location)
     patching_info = state_for(x, x->state_before());
   }
   obj.load_item();
   LIR_Opr out_reg = rlock_result(x);
   CodeStub* stub;
   CodeEmitInfo* info_for_exception = state_for(x);
   if (x->is_incompatible_class_change_check()) {
     assert(patching_info == NULL, "can't patch this");
     stub = new SimpleExceptionStub(Runtime1::throw_incompatible_class_change_error_id, LIR_OprFact::illegalOpr, info_for_exception);
   } else {
     stub = new SimpleExceptionStub(Runtime1::throw_class_cast_exception_id, obj.result(), info_for_exception);
   }
   LIR_Opr tmp1 = FrameMap::G1_oop_opr;
   LIR_Opr tmp2 = FrameMap::G3_oop_opr;
   LIR_Opr tmp3 = FrameMap::G4_oop_opr;
   __ checkcast(out_reg, obj.result(), x->klass(), tmp1, tmp2, tmp3,
                x->direct_compare(), info_for_exception, patching_info, stub,
                x->profiled_method(), x->profiled_bci());
 }
 void LIRGenerator::do_InstanceOf(InstanceOf* x) {
   LIRItem obj(x->obj(), this);
   CodeEmitInfo* patching_info = NULL;
   if (!x->klass()->is_loaded() || PatchALot) {
     patching_info = state_for(x, x->state_before());
   }
   // ensure the result register is not the input register because the result is initialized before the patching safepoint
   obj.load_item();
   LIR_Opr out_reg = rlock_result(x);
   LIR_Opr tmp1 = FrameMap::G1_oop_opr;
   LIR_Opr tmp2 = FrameMap::G3_oop_opr;
   LIR_Opr tmp3 = FrameMap::G4_oop_opr;
   __ instanceof(out_reg, obj.result(), x->klass(), tmp1, tmp2, tmp3,
                 x->direct_compare(), patching_info,
                 x->profiled_method(), x->profiled_bci());
 }
 void LIRGenerator::do_If(If* x) {
   assert(x->number_of_sux() == 2, "inconsistency");
   ValueTag tag = x->x()->type()->tag();
   LIRItem xitem(x->x(), this);
   LIRItem yitem(x->y(), this);
   LIRItem* xin = &xitem;
   LIRItem* yin = &yitem;
   If::Condition cond = x->cond();
   if (tag == longTag) {
     // for longs, only conditions "eql", "neq", "lss", "geq" are valid;
     // mirror for other conditions
     if (cond == If::gtr || cond == If::leq) {
       // swap inputs
       cond = Instruction::mirror(cond);
       xin = &yitem;
       yin = &xitem;
     }
     xin->set_destroys_register();
   }
   LIR_Opr left = LIR_OprFact::illegalOpr;
   LIR_Opr right = LIR_OprFact::illegalOpr;
   xin->load_item();
   left = xin->result();
   if (is_simm13(yin->result())) {
     // inline int constants which are small enough to be immediate operands
     right = LIR_OprFact::value_type(yin->value()->type());
   } else if (tag == longTag && yin->is_constant() && yin->get_jlong_constant() == 0 &&
              (cond == If::eql || cond == If::neq)) {
     // inline long zero
     right = LIR_OprFact::value_type(yin->value()->type());
   } else if (tag == objectTag && yin->is_constant() && (yin->get_jobject_constant()->is_null_object())) {
     right = LIR_OprFact::value_type(yin->value()->type());
   } else {
     yin->load_item();
     right = yin->result();
   }
   set_no_result(x);
   // add safepoint before generating condition code so it can be recomputed
   if (x->is_safepoint()) {
     // increment backedge counter if needed
     increment_backedge_counter(state_for(x, x->state_before()), x->profiled_bci());
     __ safepoint(new_register(T_INT), state_for(x, x->state_before()));
   }
   __ cmp(lir_cond(cond), left, right);
   // Generate branch profiling. Profiling code doesn't kill flags.
   profile_branch(x, cond);
   move_to_phi(x->state());
   if (x->x()->type()->is_float_kind()) {
     __ branch(lir_cond(cond), right->type(), x->tsux(), x->usux());
   } else {
     __ branch(lir_cond(cond), right->type(), x->tsux());
   }
   assert(x->default_sux() == x->fsux(), "wrong destination above");
   __ jump(x->default_sux());
 }
 LIR_Opr LIRGenerator::getThreadPointer() {
   return FrameMap::as_pointer_opr(G2);
 }
 void LIRGenerator::trace_block_entry(BlockBegin* block) {
   __ move(LIR_OprFact::intConst(block->block_id()), FrameMap::O0_opr);
   LIR_OprList* args = new LIR_OprList(1);
   args->append(FrameMap::O0_opr);
   address func = CAST_FROM_FN_PTR(address, Runtime1::trace_block_entry);
   __ call_runtime_leaf(func, rlock_callee_saved(T_INT), LIR_OprFact::illegalOpr, args);
 }
 void LIRGenerator::volatile_field_store(LIR_Opr value, LIR_Address* address,
                                         CodeEmitInfo* info) {
 #ifdef _LP64
   __ store(value, address, info);
 #else
   __ volatile_store_mem_reg(value, address, info);
 #endif
 }
 void LIRGenerator::volatile_field_load(LIR_Address* address, LIR_Opr result,
                                        CodeEmitInfo* info) {
 #ifdef _LP64
   __ load(address, result, info);
 #else
   __ volatile_load_mem_reg(address, result, info);
 #endif
 }
 void LIRGenerator::put_Object_unsafe(LIR_Opr src, LIR_Opr offset, LIR_Opr data,
                                      BasicType type, bool is_volatile) {
   LIR_Opr base_op = src;
   LIR_Opr index_op = offset;
   bool is_obj = (type == T_ARRAY || type == T_OBJECT);
 #ifndef _LP64
   if (is_volatile && type == T_LONG) {
     __ volatile_store_unsafe_reg(data, src, offset, type, NULL, lir_patch_none);
   } else
 #endif
     {
       if (type == T_BOOLEAN) {
         type = T_BYTE;
       }
       LIR_Address* addr;
       if (type == T_ARRAY || type == T_OBJECT) {
         LIR_Opr tmp = new_pointer_register();
         __ add(base_op, index_op, tmp);
         addr = new LIR_Address(tmp, type);
       } else {
         addr = new LIR_Address(base_op, index_op, type);
       }
       if (is_obj) {
         pre_barrier(LIR_OprFact::address(addr), LIR_OprFact::illegalOpr /* pre_val */,
                     true /* do_load */, false /* patch */, NULL);
         // _bs->c1_write_barrier_pre(this, LIR_OprFact::address(addr));
       }
       __ move(data, addr);
       if (is_obj) {
         // This address is precise
         post_barrier(LIR_OprFact::address(addr), data);
       }
     }
 }
 void LIRGenerator::get_Object_unsafe(LIR_Opr dst, LIR_Opr src, LIR_Opr offset,
                                      BasicType type, bool is_volatile) {
 #ifndef _LP64
   if (is_volatile && type == T_LONG) {
     __ volatile_load_unsafe_reg(src, offset, dst, type, NULL, lir_patch_none);
   } else
 #endif
     {
     LIR_Address* addr = new LIR_Address(src, offset, type);
     __ load(addr, dst);
   }
 }
 void LIRGenerator::do_UnsafeGetAndSetObject(UnsafeGetAndSetObject* x) {
   BasicType type = x->basic_type();
   LIRItem src(x->object(), this);
   LIRItem off(x->offset(), this);
   LIRItem value(x->value(), this);
   src.load_item();
   value.load_item();
   off.load_nonconstant();
   LIR_Opr dst = rlock_result(x, type);
   LIR_Opr data = value.result();
   bool is_obj = (type == T_ARRAY || type == T_OBJECT);
   LIR_Opr offset = off.result();
   if (data != dst) {
     __ move(data, dst);
     data = dst;
   }
   assert (!x->is_add() && (type == T_INT || (is_obj LP64_ONLY(&& UseCompressedOops))), "unexpected type");
   LIR_Address* addr;
   if (offset->is_constant()) {
 #ifdef _LP64
     jlong l = offset->as_jlong();
     assert((jlong)((jint)l) == l, "offset too large for constant");
     jint c = (jint)l;
 #else
     jint c = offset->as_jint();
 #endif
     addr = new LIR_Address(src.result(), c, type);
   } else {
     addr = new LIR_Address(src.result(), offset, type);
   }
   LIR_Opr tmp = LIR_OprFact::illegalOpr;
   LIR_Opr ptr = LIR_OprFact::illegalOpr;
   if (is_obj) {
     // Do the pre-write barrier, if any.
     // barriers on sparc don't work with a base + index address
     tmp = FrameMap::G3_opr;
     ptr = new_pointer_register();
     __ add(src.result(), off.result(), ptr);
     pre_barrier(ptr, LIR_OprFact::illegalOpr /* pre_val */,
                 true /* do_load */, false /* patch */, NULL);
   }
   __ xchg(LIR_OprFact::address(addr), data, dst, tmp);
   if (is_obj) {
     // Seems to be a precise address
     post_barrier(ptr, data);
   }
 }

Mercurial > jdk8-mips64-public > hotspot / annotate

src/cpu/sparc/vm/c1_LIRGenerator_sparc.cpp@46f6f063b272 (annotated)

src/cpu/sparc/vm/c1_LIRGenerator_sparc.cpp