/* * 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()) { int c = right.get_jint_constant(); if (! is_power_of_2(c) && ! is_power_of_2(c + 1) && ! is_power_of_2(c - 1)) { // Cannot use constant op. right.load_item(); } else { right.dont_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 = state_for(x); 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 { 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) { __ 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); } } }