| /* |
| * Copyright (c) 2005, 2016, Oracle and/or its affiliates. All rights reserved. |
| * Copyright (c) 2014, Red Hat Inc. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact 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_aarch64.inline.hpp" |
| |
| #ifdef ASSERT |
| #define __ gen()->lir(__FILE__, __LINE__)-> |
| #else |
| #define __ gen()->lir()-> |
| #endif |
| |
| // Item will be loaded into a byte register; Intel only |
| void LIRItem::load_byte_item() { |
| load_item(); |
| } |
| |
| |
| void LIRItem::load_nonconstant() { |
| LIR_Opr r = value()->operand(); |
| if (r->is_constant()) { |
| _result = r; |
| } else { |
| load_item(); |
| } |
| } |
| |
| //-------------------------------------------------------------- |
| // LIRGenerator |
| //-------------------------------------------------------------- |
| |
| |
| LIR_Opr LIRGenerator::exceptionOopOpr() { return FrameMap::r0_oop_opr; } |
| LIR_Opr LIRGenerator::exceptionPcOpr() { return FrameMap::r3_opr; } |
| LIR_Opr LIRGenerator::divInOpr() { Unimplemented(); return LIR_OprFact::illegalOpr; } |
| LIR_Opr LIRGenerator::divOutOpr() { Unimplemented(); return LIR_OprFact::illegalOpr; } |
| LIR_Opr LIRGenerator::remOutOpr() { Unimplemented(); return LIR_OprFact::illegalOpr; } |
| LIR_Opr LIRGenerator::shiftCountOpr() { Unimplemented(); return LIR_OprFact::illegalOpr; } |
| LIR_Opr LIRGenerator::syncLockOpr() { return new_register(T_INT); } |
| LIR_Opr LIRGenerator::syncTempOpr() { return FrameMap::r0_opr; } |
| LIR_Opr LIRGenerator::getThreadTemp() { return LIR_OprFact::illegalOpr; } |
| |
| |
| LIR_Opr LIRGenerator::result_register_for(ValueType* type, bool callee) { |
| LIR_Opr opr; |
| switch (type->tag()) { |
| case intTag: opr = FrameMap::r0_opr; break; |
| case objectTag: opr = FrameMap::r0_oop_opr; break; |
| case longTag: opr = FrameMap::long0_opr; break; |
| case floatTag: opr = FrameMap::fpu0_float_opr; break; |
| case doubleTag: opr = FrameMap::fpu0_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_byte(BasicType type) { |
| LIR_Opr reg = new_register(T_INT); |
| set_vreg_flag(reg, LIRGenerator::byte_reg); |
| return reg; |
| } |
| |
| |
| //--------- loading items into registers -------------------------------- |
| |
| |
| bool LIRGenerator::can_store_as_constant(Value v, BasicType type) const { |
| if (v->type()->as_IntConstant() != NULL) { |
| return v->type()->as_IntConstant()->value() == 0L; |
| } 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; |
| } |
| } |
| |
| bool LIRGenerator::can_inline_as_constant(Value v) const { |
| // FIXME: Just a guess |
| if (v->type()->as_IntConstant() != NULL) { |
| return Assembler::operand_valid_for_add_sub_immediate(v->type()->as_IntConstant()->value()); |
| } 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; |
| } |
| } |
| |
| |
| bool LIRGenerator::can_inline_as_constant(LIR_Const* c) const { return false; } |
| |
| |
| LIR_Opr LIRGenerator::safepoint_poll_register() { |
| return LIR_OprFact::illegalOpr; |
| } |
| |
| |
| LIR_Address* LIRGenerator::generate_address(LIR_Opr base, LIR_Opr index, |
| int shift, int disp, BasicType type) { |
| assert(base->is_register(), "must be"); |
| intx large_disp = disp; |
| |
| // accumulate fixed displacements |
| if (index->is_constant()) { |
| large_disp += (intx)(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 (large_disp != 0) { |
| LIR_Opr tmp = new_pointer_register(); |
| if (Assembler::operand_valid_for_add_sub_immediate(large_disp)) { |
| __ add(tmp, tmp, LIR_OprFact::intptrConst(large_disp)); |
| index = tmp; |
| } else { |
| __ move(tmp, LIR_OprFact::intptrConst(large_disp)); |
| __ add(tmp, index, tmp); |
| index = tmp; |
| } |
| large_disp = 0; |
| } |
| } else if (large_disp != 0 && !Address::offset_ok_for_immed(large_disp, shift)) { |
| // index is illegal so replace it with the displacement loaded into a register |
| index = new_pointer_register(); |
| __ move(LIR_OprFact::intptrConst(large_disp), index); |
| large_disp = 0; |
| } |
| |
| // at this point we either have base + index or base + displacement |
| if (large_disp == 0) { |
| return new LIR_Address(base, index, type); |
| } else { |
| assert(Address::offset_ok_for_immed(large_disp, 0), "must be"); |
| return new LIR_Address(base, large_disp, type); |
| } |
| } |
| |
| |
| LIR_Address* LIRGenerator::emit_array_address(LIR_Opr array_opr, LIR_Opr index_opr, |
| BasicType type, bool needs_card_mark) { |
| int offset_in_bytes = arrayOopDesc::base_offset_in_bytes(type); |
| int elem_size = type2aelembytes(type); |
| int shift = exact_log2(elem_size); |
| |
| LIR_Address* addr; |
| if (index_opr->is_constant()) { |
| addr = new LIR_Address(array_opr, |
| offset_in_bytes + (intx)(index_opr->as_jint()) * elem_size, type); |
| } else { |
| if (offset_in_bytes) { |
| LIR_Opr tmp = new_pointer_register(); |
| __ add(array_opr, LIR_OprFact::intConst(offset_in_bytes), tmp); |
| array_opr = tmp; |
| offset_in_bytes = 0; |
| } |
| addr = new LIR_Address(array_opr, |
| index_opr, |
| LIR_Address::scale(type), |
| offset_in_bytes, type); |
| } |
| if (needs_card_mark) { |
| // This store will need a precise card mark, so go ahead and |
| // compute the full adddres instead of computing once for the |
| // store and again for the card mark. |
| LIR_Opr tmp = new_pointer_register(); |
| __ leal(LIR_OprFact::address(addr), tmp); |
| return new LIR_Address(tmp, type); |
| } else { |
| return addr; |
| } |
| } |
| |
| LIR_Opr LIRGenerator::load_immediate(int x, BasicType type) { |
| LIR_Opr r; |
| if (type == T_LONG) { |
| r = LIR_OprFact::longConst(x); |
| if (!Assembler::operand_valid_for_logical_immediate(false, x)) { |
| LIR_Opr tmp = new_register(type); |
| __ move(r, tmp); |
| return tmp; |
| } |
| } else if (type == T_INT) { |
| r = LIR_OprFact::intConst(x); |
| if (!Assembler::operand_valid_for_logical_immediate(true, x)) { |
| // This is all rather nasty. We don't know whether our constant |
| // is required for a logical or an arithmetic operation, wo we |
| // don't know what the range of valid values is!! |
| LIR_Opr tmp = new_register(type); |
| __ move(r, tmp); |
| return tmp; |
| } |
| } else { |
| ShouldNotReachHere(); |
| r = NULL; // unreachable |
| } |
| 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 imm = NULL; |
| switch(addr->type()) { |
| case T_INT: |
| imm = LIR_OprFact::intConst(step); |
| break; |
| case T_LONG: |
| imm = LIR_OprFact::longConst(step); |
| break; |
| default: |
| ShouldNotReachHere(); |
| } |
| LIR_Opr reg = new_register(addr->type()); |
| __ load(addr, reg); |
| __ add(reg, imm, reg); |
| __ store(reg, addr); |
| } |
| |
| void LIRGenerator::cmp_mem_int(LIR_Condition condition, LIR_Opr base, int disp, int c, CodeEmitInfo* info) { |
| LIR_Opr reg = new_register(T_INT); |
| __ load(generate_address(base, disp, T_INT), reg, info); |
| __ cmp(condition, reg, LIR_OprFact::intConst(c)); |
| } |
| |
| void LIRGenerator::cmp_reg_mem(LIR_Condition condition, LIR_Opr reg, LIR_Opr base, int disp, BasicType type, CodeEmitInfo* info) { |
| LIR_Opr reg1 = new_register(T_INT); |
| __ load(generate_address(base, disp, type), reg1, info); |
| __ cmp(condition, reg, reg1); |
| } |
| |
| |
| bool LIRGenerator::strength_reduce_multiply(LIR_Opr left, int c, LIR_Opr result, LIR_Opr tmp) { |
| |
| if (is_power_of_2(c - 1)) { |
| __ shift_left(left, exact_log2(c - 1), tmp); |
| __ add(tmp, left, result); |
| return true; |
| } else if (is_power_of_2(c + 1)) { |
| __ shift_left(left, exact_log2(c + 1), tmp); |
| __ sub(tmp, left, result); |
| return true; |
| } else { |
| return false; |
| } |
| } |
| |
| void LIRGenerator::store_stack_parameter (LIR_Opr item, ByteSize offset_from_sp) { |
| BasicType type = item->type(); |
| __ store(item, new LIR_Address(FrameMap::sp_opr, in_bytes(offset_from_sp), type)); |
| } |
| |
| //---------------------------------------------------------------------- |
| // 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 || x->check_boolean()) { |
| 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 |
| // FIXME? No harm in this on aarch64, and it might help |
| 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 = new_register(objectType); |
| LIR_Opr tmp2 = new_register(objectType); |
| LIR_Opr tmp3 = new_register(objectType); |
| |
| 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); |
| // Seems to be a precise |
| post_barrier(LIR_OprFact::address(array_addr), value.result()); |
| } else { |
| LIR_Opr result = maybe_mask_boolean(x, array.result(), value.result(), null_check_info); |
| __ move(result, array_addr, null_check_info); |
| } |
| } |
| |
| void LIRGenerator::do_MonitorEnter(MonitorEnter* x) { |
| assert(x->is_pinned(),""); |
| LIRItem obj(x->obj(), this); |
| obj.load_item(); |
| |
| set_no_result(x); |
| |
| // "lock" stores the address of the monitor stack slot, so this is not an oop |
| LIR_Opr lock = new_register(T_INT); |
| // Need a scratch register for biased locking |
| LIR_Opr scratch = LIR_OprFact::illegalOpr; |
| if (UseBiasedLocking) { |
| scratch = new_register(T_INT); |
| } |
| |
| 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 expect object to be unlocked) |
| CodeEmitInfo* info = state_for(x, x->state(), true); |
| monitor_enter(obj.result(), lock, syncTempOpr(), 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(); |
| |
| LIR_Opr lock = new_register(T_INT); |
| LIR_Opr obj_temp = new_register(T_INT); |
| set_no_result(x); |
| monitor_exit(obj_temp, lock, syncTempOpr(), LIR_OprFact::illegalOpr, x->monitor_no()); |
| } |
| |
| |
| void LIRGenerator::do_NegateOp(NegateOp* x) { |
| |
| LIRItem from(x->x(), this); |
| from.load_item(); |
| LIR_Opr result = rlock_result(x); |
| __ negate (from.result(), result); |
| |
| } |
| |
| // for _fadd, _fmul, _fsub, _fdiv, _frem |
| // _dadd, _dmul, _dsub, _ddiv, _drem |
| void LIRGenerator::do_ArithmeticOp_FPU(ArithmeticOp* x) { |
| |
| if (x->op() == Bytecodes::_frem || x->op() == Bytecodes::_drem) { |
| // float remainder is implemented as a direct call into the runtime |
| LIRItem right(x->x(), this); |
| LIRItem left(x->y(), this); |
| |
| BasicTypeList signature(2); |
| if (x->op() == Bytecodes::_frem) { |
| signature.append(T_FLOAT); |
| signature.append(T_FLOAT); |
| } else { |
| signature.append(T_DOUBLE); |
| signature.append(T_DOUBLE); |
| } |
| CallingConvention* cc = frame_map()->c_calling_convention(&signature); |
| |
| const LIR_Opr result_reg = result_register_for(x->type()); |
| left.load_item_force(cc->at(1)); |
| right.load_item(); |
| |
| __ move(right.result(), cc->at(0)); |
| |
| address entry; |
| if (x->op() == Bytecodes::_frem) { |
| entry = CAST_FROM_FN_PTR(address, SharedRuntime::frem); |
| } else { |
| entry = CAST_FROM_FN_PTR(address, SharedRuntime::drem); |
| } |
| |
| LIR_Opr result = rlock_result(x); |
| __ call_runtime_leaf(entry, getThreadTemp(), result_reg, cc->args()); |
| __ move(result_reg, result); |
| |
| return; |
| } |
| |
| LIRItem left(x->x(), this); |
| LIRItem right(x->y(), this); |
| LIRItem* left_arg = &left; |
| LIRItem* right_arg = &right; |
| |
| // Always load right hand side. |
| right.load_item(); |
| |
| if (!left.is_register()) |
| left.load_item(); |
| |
| LIR_Opr reg = rlock(x); |
| LIR_Opr tmp = LIR_OprFact::illegalOpr; |
| if (x->is_strictfp() && (x->op() == Bytecodes::_dmul || x->op() == Bytecodes::_ddiv)) { |
| tmp = new_register(T_DOUBLE); |
| } |
| |
| arithmetic_op_fpu(x->op(), reg, left.result(), right.result(), NULL); |
| |
| set_result(x, round_item(reg)); |
| } |
| |
| // for _ladd, _lmul, _lsub, _ldiv, _lrem |
| void LIRGenerator::do_ArithmeticOp_Long(ArithmeticOp* x) { |
| |
| // missing test if instr is commutative and if we should swap |
| LIRItem left(x->x(), this); |
| LIRItem right(x->y(), this); |
| |
| if (x->op() == Bytecodes::_ldiv || x->op() == Bytecodes::_lrem) { |
| |
| // the check for division by zero destroys the right operand |
| right.set_destroys_register(); |
| |
| // check for division by zero (destroys registers of right operand!) |
| CodeEmitInfo* info = state_for(x); |
| |
| left.load_item(); |
| right.load_item(); |
| |
| __ cmp(lir_cond_equal, right.result(), LIR_OprFact::longConst(0)); |
| __ branch(lir_cond_equal, T_LONG, new DivByZeroStub(info)); |
| |
| rlock_result(x); |
| switch (x->op()) { |
| case Bytecodes::_lrem: |
| __ rem (left.result(), right.result(), x->operand()); |
| break; |
| case Bytecodes::_ldiv: |
| __ div (left.result(), right.result(), x->operand()); |
| break; |
| default: |
| ShouldNotReachHere(); |
| break; |
| } |
| |
| |
| } else { |
| assert (x->op() == Bytecodes::_lmul || x->op() == Bytecodes::_ladd || x->op() == Bytecodes::_lsub, |
| "expect lmul, ladd or lsub"); |
| // add, sub, mul |
| left.load_item(); |
| if (! right.is_register()) { |
| if (x->op() == Bytecodes::_lmul |
| || ! right.is_constant() |
| || ! Assembler::operand_valid_for_add_sub_immediate(right.get_jlong_constant())) { |
| right.load_item(); |
| } else { // add, sub |
| assert (x->op() == Bytecodes::_ladd || x->op() == Bytecodes::_lsub, "expect ladd or lsub"); |
| // don't load constants to save register |
| right.load_nonconstant(); |
| } |
| } |
| rlock_result(x); |
| arithmetic_op_long(x->op(), x->operand(), left.result(), right.result(), NULL); |
| } |
| } |
| |
| // for: _iadd, _imul, _isub, _idiv, _irem |
| void LIRGenerator::do_ArithmeticOp_Int(ArithmeticOp* x) { |
| |
| // Test if instr is commutative and if we should swap |
| LIRItem left(x->x(), this); |
| LIRItem right(x->y(), this); |
| LIRItem* left_arg = &left; |
| LIRItem* right_arg = &right; |
| if (x->is_commutative() && left.is_stack() && right.is_register()) { |
| // swap them if left is real stack (or cached) and right is real register(not cached) |
| left_arg = &right; |
| right_arg = &left; |
| } |
| |
| left_arg->load_item(); |
| |
| // do not need to load right, as we can handle stack and constants |
| if (x->op() == Bytecodes::_idiv || x->op() == Bytecodes::_irem) { |
| |
| right_arg->load_item(); |
| rlock_result(x); |
| |
| CodeEmitInfo* info = state_for(x); |
| LIR_Opr tmp = new_register(T_INT); |
| __ cmp(lir_cond_equal, right_arg->result(), LIR_OprFact::longConst(0)); |
| __ branch(lir_cond_equal, T_INT, new DivByZeroStub(info)); |
| info = state_for(x); |
| |
| if (x->op() == Bytecodes::_irem) { |
| __ irem(left_arg->result(), right_arg->result(), x->operand(), tmp, NULL); |
| } else if (x->op() == Bytecodes::_idiv) { |
| __ idiv(left_arg->result(), right_arg->result(), x->operand(), tmp, NULL); |
| } |
| |
| } else if (x->op() == Bytecodes::_iadd || x->op() == Bytecodes::_isub) { |
| if (right.is_constant() |
| && Assembler::operand_valid_for_add_sub_immediate(right.get_jint_constant())) { |
| right.load_nonconstant(); |
| } else { |
| right.load_item(); |
| } |
| rlock_result(x); |
| arithmetic_op_int(x->op(), x->operand(), left_arg->result(), right_arg->result(), LIR_OprFact::illegalOpr); |
| } else { |
| assert (x->op() == Bytecodes::_imul, "expect imul"); |
| if (right.is_constant()) { |
| jint c = right.get_jint_constant(); |
| if (c > 0 && c < max_jint && (is_power_of_2(c) || is_power_of_2(c - 1) || is_power_of_2(c + 1))) { |
| right_arg->dont_load_item(); |
| } else { |
| // Cannot use constant op. |
| right_arg->load_item(); |
| } |
| } else { |
| right.load_item(); |
| } |
| rlock_result(x); |
| arithmetic_op_int(x->op(), x->operand(), left_arg->result(), right_arg->result(), new_register(T_INT)); |
| } |
| } |
| |
| void LIRGenerator::do_ArithmeticOp(ArithmeticOp* x) { |
| // when an operand with use count 1 is the left operand, then it is |
| // likely that no move for 2-operand-LIR-form is necessary |
| if (x->is_commutative() && x->y()->as_Constant() == NULL && x->x()->use_count() > x->y()->use_count()) { |
| x->swap_operands(); |
| } |
| |
| 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 left(x->x(), this); |
| LIRItem right(x->y(), this); |
| |
| left.load_item(); |
| |
| rlock_result(x); |
| if (right.is_constant()) { |
| right.dont_load_item(); |
| |
| switch (x->op()) { |
| case Bytecodes::_ishl: { |
| int c = right.get_jint_constant() & 0x1f; |
| __ shift_left(left.result(), c, x->operand()); |
| break; |
| } |
| case Bytecodes::_ishr: { |
| int c = right.get_jint_constant() & 0x1f; |
| __ shift_right(left.result(), c, x->operand()); |
| break; |
| } |
| case Bytecodes::_iushr: { |
| int c = right.get_jint_constant() & 0x1f; |
| __ unsigned_shift_right(left.result(), c, x->operand()); |
| break; |
| } |
| case Bytecodes::_lshl: { |
| int c = right.get_jint_constant() & 0x3f; |
| __ shift_left(left.result(), c, x->operand()); |
| break; |
| } |
| case Bytecodes::_lshr: { |
| int c = right.get_jint_constant() & 0x3f; |
| __ shift_right(left.result(), c, x->operand()); |
| break; |
| } |
| case Bytecodes::_lushr: { |
| int c = right.get_jint_constant() & 0x3f; |
| __ unsigned_shift_right(left.result(), c, x->operand()); |
| break; |
| } |
| default: |
| ShouldNotReachHere(); |
| } |
| } else { |
| right.load_item(); |
| LIR_Opr tmp = new_register(T_INT); |
| switch (x->op()) { |
| case Bytecodes::_ishl: { |
| __ logical_and(right.result(), LIR_OprFact::intConst(0x1f), tmp); |
| __ shift_left(left.result(), tmp, x->operand(), tmp); |
| break; |
| } |
| case Bytecodes::_ishr: { |
| __ logical_and(right.result(), LIR_OprFact::intConst(0x1f), tmp); |
| __ shift_right(left.result(), tmp, x->operand(), tmp); |
| break; |
| } |
| case Bytecodes::_iushr: { |
| __ logical_and(right.result(), LIR_OprFact::intConst(0x1f), tmp); |
| __ unsigned_shift_right(left.result(), tmp, x->operand(), tmp); |
| break; |
| } |
| case Bytecodes::_lshl: { |
| __ logical_and(right.result(), LIR_OprFact::intConst(0x3f), tmp); |
| __ shift_left(left.result(), tmp, x->operand(), tmp); |
| break; |
| } |
| case Bytecodes::_lshr: { |
| __ logical_and(right.result(), LIR_OprFact::intConst(0x3f), tmp); |
| __ shift_right(left.result(), tmp, x->operand(), tmp); |
| break; |
| } |
| case Bytecodes::_lushr: { |
| __ logical_and(right.result(), LIR_OprFact::intConst(0x3f), tmp); |
| __ unsigned_shift_right(left.result(), tmp, x->operand(), tmp); |
| break; |
| } |
| default: |
| ShouldNotReachHere(); |
| } |
| } |
| } |
| |
| // _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(); |
| |
| rlock_result(x); |
| if (right.is_constant() |
| && ((right.type()->tag() == intTag |
| && Assembler::operand_valid_for_logical_immediate(true, right.get_jint_constant())) |
| || (right.type()->tag() == longTag |
| && Assembler::operand_valid_for_logical_immediate(false, right.get_jlong_constant())))) { |
| right.dont_load_item(); |
| } else { |
| right.load_item(); |
| } |
| switch (x->op()) { |
| case Bytecodes::_iand: |
| case Bytecodes::_land: |
| __ logical_and(left.result(), right.result(), x->operand()); break; |
| case Bytecodes::_ior: |
| case Bytecodes::_lor: |
| __ logical_or (left.result(), right.result(), x->operand()); break; |
| case Bytecodes::_ixor: |
| case Bytecodes::_lxor: |
| __ logical_xor(left.result(), right.result(), x->operand()); break; |
| default: Unimplemented(); |
| } |
| } |
| |
| // _lcmp, _fcmpl, _fcmpg, _dcmpl, _dcmpg |
| void LIRGenerator::do_CompareOp(CompareOp* x) { |
| LIRItem left(x->x(), this); |
| LIRItem right(x->y(), this); |
| ValueTag tag = x->x()->type()->tag(); |
| if (tag == longTag) { |
| left.set_destroys_register(); |
| } |
| 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 |
| |
| assert(obj.type()->tag() == objectTag, "invalid type"); |
| |
| // In 64bit the type can be long, sparc doesn't have this assert |
| // assert(offset.type()->tag() == intTag, "invalid type"); |
| |
| assert(cmp.type()->tag() == type->tag(), "invalid type"); |
| assert(val.type()->tag() == type->tag(), "invalid type"); |
| |
| // get address of field |
| obj.load_item(); |
| offset.load_nonconstant(); |
| val.load_item(); |
| cmp.load_item(); |
| |
| LIR_Address* a; |
| if(offset.result()->is_constant()) { |
| jlong c = offset.result()->as_jlong(); |
| if ((jlong)((jint)c) == c) { |
| a = new LIR_Address(obj.result(), |
| (jint)c, |
| as_BasicType(type)); |
| } else { |
| LIR_Opr tmp = new_register(T_LONG); |
| __ move(offset.result(), tmp); |
| a = new LIR_Address(obj.result(), |
| tmp, |
| as_BasicType(type)); |
| } |
| } else { |
| a = new LIR_Address(obj.result(), |
| offset.result(), |
| 0, |
| as_BasicType(type)); |
| } |
| LIR_Opr addr = new_pointer_register(); |
| __ leal(LIR_OprFact::address(a), addr); |
| |
| if (type == objectType) { // Write-barrier needed for Object fields. |
| // Do the pre-write barrier, if any. |
| pre_barrier(addr, LIR_OprFact::illegalOpr /* pre_val */, |
| true /* do_load */, false /* patch */, NULL); |
| } |
| |
| LIR_Opr result = rlock_result(x); |
| |
| LIR_Opr ill = LIR_OprFact::illegalOpr; // for convenience |
| if (type == objectType) |
| __ cas_obj(addr, cmp.result(), val.result(), new_register(T_INT), new_register(T_INT), |
| result); |
| else if (type == intType) |
| __ cas_int(addr, cmp.result(), val.result(), ill, ill); |
| else if (type == longType) |
| __ cas_long(addr, cmp.result(), val.result(), ill, ill); |
| else { |
| ShouldNotReachHere(); |
| } |
| |
| __ logical_xor(FrameMap::r8_opr, LIR_OprFact::intConst(1), result); |
| |
| if (type == objectType) { // Write-barrier needed for Object fields. |
| // Seems to be precise |
| 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()); |
| |
| 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); |
| |
| // operands for arraycopy must use fixed registers, otherwise |
| // LinearScan will fail allocation (because arraycopy always needs a |
| // call) |
| |
| // The java calling convention will give us enough registers |
| // so that on the stub side the args will be perfect already. |
| // On the other slow/special case side we call C and the arg |
| // positions are not similar enough to pick one as the best. |
| // Also because the java calling convention is a "shifted" version |
| // of the C convention we can process the java args trivially into C |
| // args without worry of overwriting during the xfer |
| |
| src.load_item_force (FrameMap::as_oop_opr(j_rarg0)); |
| src_pos.load_item_force (FrameMap::as_opr(j_rarg1)); |
| dst.load_item_force (FrameMap::as_oop_opr(j_rarg2)); |
| dst_pos.load_item_force (FrameMap::as_opr(j_rarg3)); |
| length.load_item_force (FrameMap::as_opr(j_rarg4)); |
| |
| LIR_Opr tmp = FrameMap::as_opr(j_rarg5); |
| |
| set_no_result(x); |
| |
| int flags; |
| ciArrayKlass* expected_type; |
| arraycopy_helper(x, &flags, &expected_type); |
| |
| __ arraycopy(src.result(), src_pos.result(), dst.result(), dst_pos.result(), length.result(), tmp, expected_type, flags, info); // does add_safepoint |
| } |
| |
| void LIRGenerator::do_update_CRC32(Intrinsic* x) { |
| assert(UseCRC32Intrinsics, "why are we here?"); |
| // Make all state_for calls early since they can emit code |
| LIR_Opr result = rlock_result(x); |
| int flags = 0; |
| switch (x->id()) { |
| case vmIntrinsics::_updateCRC32: { |
| LIRItem crc(x->argument_at(0), this); |
| LIRItem val(x->argument_at(1), this); |
| // val is destroyed by update_crc32 |
| val.set_destroys_register(); |
| crc.load_item(); |
| val.load_item(); |
| __ update_crc32(crc.result(), val.result(), result); |
| break; |
| } |
| case vmIntrinsics::_updateBytesCRC32: |
| case vmIntrinsics::_updateByteBufferCRC32: { |
| bool is_updateBytes = (x->id() == vmIntrinsics::_updateBytesCRC32); |
| |
| LIRItem crc(x->argument_at(0), this); |
| LIRItem buf(x->argument_at(1), this); |
| LIRItem off(x->argument_at(2), this); |
| LIRItem len(x->argument_at(3), this); |
| buf.load_item(); |
| off.load_nonconstant(); |
| |
| LIR_Opr index = off.result(); |
| int offset = is_updateBytes ? arrayOopDesc::base_offset_in_bytes(T_BYTE) : 0; |
| if(off.result()->is_constant()) { |
| index = LIR_OprFact::illegalOpr; |
| offset += off.result()->as_jint(); |
| } |
| LIR_Opr base_op = buf.result(); |
| |
| if (index->is_valid()) { |
| LIR_Opr tmp = new_register(T_LONG); |
| __ convert(Bytecodes::_i2l, index, tmp); |
| index = tmp; |
| } |
| |
| if (offset) { |
| LIR_Opr tmp = new_pointer_register(); |
| __ add(base_op, LIR_OprFact::intConst(offset), tmp); |
| base_op = tmp; |
| offset = 0; |
| } |
| |
| LIR_Address* a = new LIR_Address(base_op, |
| index, |
| offset, |
| T_BYTE); |
| BasicTypeList signature(3); |
| signature.append(T_INT); |
| signature.append(T_ADDRESS); |
| signature.append(T_INT); |
| CallingConvention* cc = frame_map()->c_calling_convention(&signature); |
| const LIR_Opr result_reg = result_register_for(x->type()); |
| |
| LIR_Opr addr = new_pointer_register(); |
| __ leal(LIR_OprFact::address(a), addr); |
| |
| crc.load_item_force(cc->at(0)); |
| __ move(addr, cc->at(1)); |
| len.load_item_force(cc->at(2)); |
| |
| __ call_runtime_leaf(StubRoutines::updateBytesCRC32(), getThreadTemp(), result_reg, cc->args()); |
| __ move(result_reg, result); |
| |
| break; |
| } |
| default: { |
| ShouldNotReachHere(); |
| } |
| } |
| } |
| |
| void LIRGenerator::do_update_CRC32C(Intrinsic* x) { |
| Unimplemented(); |
| } |
| |
| void LIRGenerator::do_FmaIntrinsic(Intrinsic* x) { |
| assert(x->number_of_arguments() == 3, "wrong type"); |
| assert(UseFMA, "Needs FMA instructions support."); |
| LIRItem value(x->argument_at(0), this); |
| LIRItem value1(x->argument_at(1), this); |
| LIRItem value2(x->argument_at(2), this); |
| |
| value.load_item(); |
| value1.load_item(); |
| value2.load_item(); |
| |
| LIR_Opr calc_input = value.result(); |
| LIR_Opr calc_input1 = value1.result(); |
| LIR_Opr calc_input2 = value2.result(); |
| LIR_Opr calc_result = rlock_result(x); |
| |
| switch (x->id()) { |
| case vmIntrinsics::_fmaD: __ fmad(calc_input, calc_input1, calc_input2, calc_result); break; |
| case vmIntrinsics::_fmaF: __ fmaf(calc_input, calc_input1, calc_input2, calc_result); break; |
| default: ShouldNotReachHere(); |
| } |
| } |
| |
| void LIRGenerator::do_vectorizedMismatch(Intrinsic* x) { |
| fatal("vectorizedMismatch intrinsic is not implemented on this platform"); |
| } |
| |
| // _i2l, _i2f, _i2d, _l2i, _l2f, _l2d, _f2i, _f2l, _f2d, _d2i, _d2l, _d2f |
| // _i2b, _i2c, _i2s |
| void LIRGenerator::do_Convert(Convert* x) { |
| LIRItem value(x->value(), this); |
| value.load_item(); |
| LIR_Opr input = value.result(); |
| LIR_Opr result = rlock(x); |
| |
| // arguments of lir_convert |
| LIR_Opr conv_input = input; |
| LIR_Opr conv_result = result; |
| ConversionStub* stub = NULL; |
| |
| __ convert(x->op(), conv_input, conv_result); |
| |
| assert(result->is_virtual(), "result must be virtual register"); |
| set_result(x, result); |
| } |
| |
| void LIRGenerator::do_NewInstance(NewInstance* x) { |
| #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 reg = result_register_for(x->type()); |
| new_instance(reg, x->klass(), x->is_unresolved(), |
| FrameMap::r2_oop_opr, |
| FrameMap::r5_oop_opr, |
| FrameMap::r4_oop_opr, |
| LIR_OprFact::illegalOpr, |
| FrameMap::r3_metadata_opr, info); |
| LIR_Opr result = rlock_result(x); |
| __ move(reg, result); |
| } |
| |
| void LIRGenerator::do_NewTypeArray(NewTypeArray* x) { |
| CodeEmitInfo* info = state_for(x, x->state()); |
| |
| LIRItem length(x->length(), this); |
| length.load_item_force(FrameMap::r19_opr); |
| |
| LIR_Opr reg = result_register_for(x->type()); |
| LIR_Opr tmp1 = FrameMap::r2_oop_opr; |
| LIR_Opr tmp2 = FrameMap::r4_oop_opr; |
| LIR_Opr tmp3 = FrameMap::r5_oop_opr; |
| LIR_Opr tmp4 = reg; |
| LIR_Opr klass_reg = FrameMap::r3_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) { |
| LIRItem length(x->length(), this); |
| // 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()); |
| } |
| |
| CodeEmitInfo* info = state_for(x, x->state()); |
| |
| LIR_Opr reg = result_register_for(x->type()); |
| LIR_Opr tmp1 = FrameMap::r2_oop_opr; |
| LIR_Opr tmp2 = FrameMap::r4_oop_opr; |
| LIR_Opr tmp3 = FrameMap::r5_oop_opr; |
| LIR_Opr tmp4 = reg; |
| LIR_Opr klass_reg = FrameMap::r3_metadata_opr; |
| |
| length.load_item_force(FrameMap::r19_opr); |
| LIR_Opr len = length.result(); |
| |
| CodeStub* slow_path = new NewObjectArrayStub(klass_reg, len, reg, info); |
| ciKlass* obj = (ciKlass*) 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(i, i, 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(i*4)); |
| } |
| |
| LIR_Opr klass_reg = FrameMap::r0_metadata_opr; |
| klass2reg_with_patching(klass_reg, x->klass(), patching_info); |
| |
| LIR_Opr rank = FrameMap::r19_opr; |
| __ move(LIR_OprFact::intConst(x->rank()), rank); |
| LIR_Opr varargs = FrameMap::r2_opr; |
| __ move(FrameMap::sp_opr, varargs); |
| LIR_OprList* args = new LIR_OprList(3); |
| args->append(klass_reg); |
| args->append(rank); |
| args->append(varargs); |
| 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) { |
| // nothing to do for now |
| } |
| |
| 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 (the latter is for deoptimization) |
| patching_info = state_for(x, x->state_before()); |
| } |
| obj.load_item(); |
| |
| // info for exceptions |
| CodeEmitInfo* info_for_exception = |
| (x->needs_exception_state() ? state_for(x) : |
| state_for(x, x->state_before(), true /*ignore_xhandler*/)); |
| |
| CodeStub* stub; |
| 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 if (x->is_invokespecial_receiver_check()) { |
| assert(patching_info == NULL, "can't patch this"); |
| stub = new DeoptimizeStub(info_for_exception, |
| Deoptimization::Reason_class_check, |
| Deoptimization::Action_none); |
| } else { |
| stub = new SimpleExceptionStub(Runtime1::throw_class_cast_exception_id, obj.result(), info_for_exception); |
| } |
| LIR_Opr reg = rlock_result(x); |
| LIR_Opr tmp3 = LIR_OprFact::illegalOpr; |
| if (!x->klass()->is_loaded() || UseCompressedClassPointers) { |
| tmp3 = new_register(objectType); |
| } |
| __ checkcast(reg, obj.result(), x->klass(), |
| new_register(objectType), new_register(objectType), 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); |
| |
| // result and test object may not be in same register |
| LIR_Opr reg = rlock_result(x); |
| CodeEmitInfo* patching_info = NULL; |
| if ((!x->klass()->is_loaded() || PatchALot)) { |
| // must do this before locking the destination register as an oop register |
| patching_info = state_for(x, x->state_before()); |
| } |
| obj.load_item(); |
| LIR_Opr tmp3 = LIR_OprFact::illegalOpr; |
| if (!x->klass()->is_loaded() || UseCompressedClassPointers) { |
| tmp3 = new_register(objectType); |
| } |
| __ instanceof(reg, obj.result(), x->klass(), |
| new_register(objectType), new_register(objectType), 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(); |
| bool is_safepoint = x->is_safepoint(); |
| |
| If::Condition cond = x->cond(); |
| |
| LIRItem xitem(x->x(), this); |
| LIRItem yitem(x->y(), this); |
| LIRItem* xin = &xitem; |
| LIRItem* yin = &yitem; |
| |
| if (tag == longTag) { |
| // for longs, only conditions "eql", "neq", "lss", "geq" are valid; |
| // mirror for other conditions |
| if (cond == If::gtr || cond == If::leq) { |
| cond = Instruction::mirror(cond); |
| xin = &yitem; |
| yin = &xitem; |
| } |
| xin->set_destroys_register(); |
| } |
| xin->load_item(); |
| |
| if (tag == longTag) { |
| if (yin->is_constant() |
| && Assembler::operand_valid_for_add_sub_immediate(yin->get_jlong_constant())) { |
| yin->dont_load_item(); |
| } else { |
| yin->load_item(); |
| } |
| } else if (tag == intTag) { |
| if (yin->is_constant() |
| && Assembler::operand_valid_for_add_sub_immediate(yin->get_jint_constant())) { |
| yin->dont_load_item(); |
| } else { |
| yin->load_item(); |
| } |
| } else { |
| yin->load_item(); |
| } |
| |
| // 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(LIR_OprFact::illegalOpr, state_for(x, x->state_before())); |
| } |
| set_no_result(x); |
| |
| LIR_Opr left = xin->result(); |
| LIR_Opr right = yin->result(); |
| |
| __ 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(rthread); |
| } |
| |
| void LIRGenerator::trace_block_entry(BlockBegin* block) { Unimplemented(); } |
| |
| void LIRGenerator::volatile_field_store(LIR_Opr value, LIR_Address* address, |
| CodeEmitInfo* info) { |
| __ volatile_store_mem_reg(value, address, info); |
| } |
| |
| void LIRGenerator::volatile_field_load(LIR_Address* address, LIR_Opr result, |
| CodeEmitInfo* info) { |
| // 8179954: We need to make sure that the code generated for |
| // volatile accesses forms a sequentially-consistent set of |
| // operations when combined with STLR and LDAR. Without a leading |
| // membar it's possible for a simple Dekker test to fail if loads |
| // use LD;DMB but stores use STLR. This can happen if C2 compiles |
| // the stores in one method and C1 compiles the loads in another. |
| if (! UseBarriersForVolatile) { |
| __ membar(); |
| } |
| |
| __ volatile_load_mem_reg(address, result, info); |
| } |
| |
| void LIRGenerator::get_Object_unsafe(LIR_Opr dst, LIR_Opr src, LIR_Opr offset, |
| BasicType type, bool is_volatile) { |
| LIR_Address* addr = new LIR_Address(src, offset, type); |
| __ load(addr, dst); |
| } |
| |
| |
| void LIRGenerator::put_Object_unsafe(LIR_Opr src, LIR_Opr offset, LIR_Opr data, |
| BasicType type, bool is_volatile) { |
| LIR_Address* addr = new LIR_Address(src, offset, type); |
| bool is_obj = (type == T_ARRAY || type == T_OBJECT); |
| if (is_obj) { |
| // Do the pre-write barrier, if any. |
| pre_barrier(LIR_OprFact::address(addr), LIR_OprFact::illegalOpr /* pre_val */, |
| true /* do_load */, false /* patch */, NULL); |
| __ move(data, addr); |
| assert(src->is_register(), "must be register"); |
| // Seems to be a precise address |
| post_barrier(LIR_OprFact::address(addr), data); |
| } else { |
| __ move(data, addr); |
| } |
| } |
| |
| 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(); |
| off.load_nonconstant(); |
| |
| // We can cope with a constant increment in an xadd |
| if (! (x->is_add() |
| && value.is_constant() |
| && can_inline_as_constant(x->value()))) { |
| value.load_item(); |
| } |
| |
| 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) { |
| LIR_Opr tmp = new_register(data->type()); |
| __ move(data, tmp); |
| data = tmp; |
| } |
| |
| LIR_Address* addr; |
| if (offset->is_constant()) { |
| jlong l = offset->as_jlong(); |
| assert((jlong)((jint)l) == l, "offset too large for constant"); |
| jint c = (jint)l; |
| addr = new LIR_Address(src.result(), c, type); |
| } else { |
| addr = new LIR_Address(src.result(), offset, type); |
| } |
| |
| LIR_Opr tmp = new_register(T_INT); |
| LIR_Opr ptr = LIR_OprFact::illegalOpr; |
| |
| if (x->is_add()) { |
| __ xadd(LIR_OprFact::address(addr), data, dst, tmp); |
| } else { |
| if (is_obj) { |
| // Do the pre-write barrier, if any. |
| 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) { |
| post_barrier(ptr, data); |
| } |
| } |
| } |