< prev index next > src/hotspot/cpu/aarch64/c1_LIRAssembler_aarch64.cpp
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#include "c1/c1_LIRAssembler.hpp"
#include "c1/c1_MacroAssembler.hpp"
#include "c1/c1_Runtime1.hpp"
#include "c1/c1_ValueStack.hpp"
#include "ci/ciArrayKlass.hpp"
+ #include "ci/ciInlineKlass.hpp"
#include "ci/ciInstance.hpp"
#include "code/compiledIC.hpp"
#include "gc/shared/collectedHeap.hpp"
#include "gc/shared/gc_globals.hpp"
#include "nativeInst_aarch64.hpp"
#include "oops/objArrayKlass.hpp"
+ #include "oops/oop.inline.hpp"
#include "runtime/frame.inline.hpp"
#include "runtime/sharedRuntime.hpp"
#include "runtime/stubRoutines.hpp"
#include "utilities/powerOfTwo.hpp"
#include "vmreg_aarch64.inline.hpp"
__ mov(r0, r19); // Restore the exception
}
// remove the activation and dispatch to the unwind handler
__ block_comment("remove_frame and dispatch to the unwind handler");
- __ remove_frame(initial_frame_size_in_bytes());
+ __ remove_frame(initial_frame_size_in_bytes(), needs_stack_repair());
__ far_jump(RuntimeAddress(Runtime1::entry_for(C1StubId::unwind_exception_id)));
// Emit the slow path assembly
if (stub != nullptr) {
stub->emit_code(this);
}
void LIR_Assembler::return_op(LIR_Opr result, C1SafepointPollStub* code_stub) {
assert(result->is_illegal() || !result->is_single_cpu() || result->as_register() == r0, "word returns are in r0,");
+ if (InlineTypeReturnedAsFields) {
+ // Check if we are returning an non-null inline type and load its fields into registers
+ ciType* return_type = compilation()->method()->return_type();
+ if (return_type->is_inlinetype()) {
+ ciInlineKlass* vk = return_type->as_inline_klass();
+ if (vk->can_be_returned_as_fields()) {
+ address unpack_handler = vk->unpack_handler();
+ assert(unpack_handler != nullptr, "must be");
+ __ far_call(RuntimeAddress(unpack_handler));
+ }
+ } else if (return_type->is_instance_klass() && (!return_type->is_loaded() || StressCallingConvention)) {
+ Label skip;
+ __ test_oop_is_not_inline_type(r0, rscratch2, skip);
+
+ // Load fields from a buffered value with an inline class specific handler
+ __ load_klass(rscratch1 /*dst*/, r0 /*src*/);
+ __ ldr(rscratch1, Address(rscratch1, InstanceKlass::adr_inlineklass_fixed_block_offset()));
+ __ ldr(rscratch1, Address(rscratch1, InlineKlass::unpack_handler_offset()));
+ // Unpack handler can be null if inline type is not scalarizable in returns
+ __ cbz(rscratch1, skip);
+ __ blr(rscratch1);
+
+ __ bind(skip);
+ }
+ // At this point, r0 points to the value object (for interpreter or C1 caller).
+ // The fields of the object are copied into registers (for C2 caller).
+ }
+
// Pop the stack before the safepoint code
- __ remove_frame(initial_frame_size_in_bytes());
+ __ remove_frame(initial_frame_size_in_bytes(), needs_stack_repair());
if (StackReservedPages > 0 && compilation()->has_reserved_stack_access()) {
__ reserved_stack_check();
}
__ relocate(relocInfo::poll_return_type);
__ safepoint_poll(*code_stub->entry(), true /* at_return */, false /* acquire */, true /* in_nmethod */);
__ ret(lr);
}
+ int LIR_Assembler::store_inline_type_fields_to_buf(ciInlineKlass* vk) {
+ return (__ store_inline_type_fields_to_buf(vk, false));
+ }
+
int LIR_Assembler::safepoint_poll(LIR_Opr tmp, CodeEmitInfo* info) {
guarantee(info != nullptr, "Shouldn't be null");
__ get_polling_page(rscratch1, relocInfo::poll_type);
add_debug_info_for_branch(info); // This isn't just debug info:
// it's the oop map
__ mov(dest->as_register_lo(), (intptr_t)c->as_jlong());
break;
}
case T_OBJECT: {
- if (patch_code == lir_patch_none) {
- jobject2reg(c->as_jobject(), dest->as_register());
- } else {
+ if (patch_code != lir_patch_none) {
jobject2reg_with_patching(dest->as_register(), info);
+ } else {
+ jobject2reg(c->as_jobject(), dest->as_register());
}
break;
}
case T_METADATA: {
assert(c->as_jint() == 0, "should be");
insn = &Assembler::strw;
break;
case T_OBJECT:
case T_ARRAY:
+ // Non-null case is not handled on aarch64 but handled on x86
+ // FIXME: do we need to add it here?
assert(c->as_jobject() == nullptr, "should be");
if (UseCompressedOops && !wide) {
insn = &Assembler::strw;
} else {
insn = &Assembler::str;
__ verify_oop(dest->as_register());
}
}
+ void LIR_Assembler::move(LIR_Opr src, LIR_Opr dst) {
+ assert(dst->is_cpu_register(), "must be");
+ assert(dst->type() == src->type(), "must be");
+
+ if (src->is_cpu_register()) {
+ reg2reg(src, dst);
+ } else if (src->is_stack()) {
+ stack2reg(src, dst, dst->type());
+ } else if (src->is_constant()) {
+ const2reg(src, dst, lir_patch_none, nullptr);
+ } else {
+ ShouldNotReachHere();
+ }
+ }
int LIR_Assembler::array_element_size(BasicType type) const {
int elem_size = type2aelembytes(type);
return exact_log2(elem_size);
}
void LIR_Assembler::emit_alloc_array(LIR_OpAllocArray* op) {
Register len = op->len()->as_register();
__ uxtw(len, len);
- if (UseSlowPath ||
+ if (UseSlowPath || op->is_null_free() ||
(!UseFastNewObjectArray && is_reference_type(op->type())) ||
(!UseFastNewTypeArray && !is_reference_type(op->type()))) {
__ b(*op->stub()->entry());
} else {
Register tmp1 = op->tmp1()->as_register();
select_different_registers(obj, dst, k_RInfo, klass_RInfo, Rtmp1);
}
assert_different_registers(obj, k_RInfo, klass_RInfo);
- if (should_profile) {
- Register mdo = klass_RInfo;
- __ mov_metadata(mdo, md->constant_encoding());
- Label not_null;
- __ cbnz(obj, not_null);
- // Object is null; update MDO and exit
- Address data_addr
- = __ form_address(rscratch2, mdo,
- md->byte_offset_of_slot(data, DataLayout::flags_offset()),
- 0);
- __ ldrb(rscratch1, data_addr);
- __ orr(rscratch1, rscratch1, BitData::null_seen_byte_constant());
- __ strb(rscratch1, data_addr);
- __ b(*obj_is_null);
- __ bind(not_null);
-
- Label update_done;
- Register recv = k_RInfo;
- __ load_klass(recv, obj);
- type_profile_helper(mdo, md, data, recv, &update_done);
- Address counter_addr(mdo, md->byte_offset_of_slot(data, CounterData::count_offset()));
- __ addptr(counter_addr, DataLayout::counter_increment);
+ if (op->need_null_check()) {
+ if (should_profile) {
+ Register mdo = klass_RInfo;
+ __ mov_metadata(mdo, md->constant_encoding());
+ Label not_null;
+ __ cbnz(obj, not_null);
+ // Object is null; update MDO and exit
+ Address data_addr
+ = __ form_address(rscratch2, mdo,
+ md->byte_offset_of_slot(data, DataLayout::flags_offset()),
+ 0);
+ __ ldrb(rscratch1, data_addr);
+ __ orr(rscratch1, rscratch1, BitData::null_seen_byte_constant());
+ __ strb(rscratch1, data_addr);
+ __ b(*obj_is_null);
+ __ bind(not_null);
- __ bind(update_done);
- } else {
- __ cbz(obj, *obj_is_null);
+ Label update_done;
+ Register recv = k_RInfo;
+ __ load_klass(recv, obj);
+ type_profile_helper(mdo, md, data, recv, &update_done);
+ Address counter_addr(mdo, md->byte_offset_of_slot(data, CounterData::count_offset()));
+ __ addptr(counter_addr, DataLayout::counter_increment);
+
+ __ bind(update_done);
+ } else {
+ __ cbz(obj, *obj_is_null);
+ }
}
if (!k->is_loaded()) {
klass2reg_with_patching(k_RInfo, op->info_for_patch());
} else {
} else {
ShouldNotReachHere();
}
}
+ void LIR_Assembler::emit_opFlattenedArrayCheck(LIR_OpFlattenedArrayCheck* op) {
+ // We are loading/storing from/to an array that *may* be a flat array (the
+ // declared type is Object[], abstract[], interface[] or VT.ref[]).
+ // If this array is a flat array, take the slow path.
+ __ test_flat_array_oop(op->array()->as_register(), op->tmp()->as_register(), *op->stub()->entry());
+ if (!op->value()->is_illegal()) {
+ // The array is not a flat array, but it might be null-free. If we are storing
+ // a null into a null-free array, take the slow path (which will throw NPE).
+ Label skip;
+ __ cbnz(op->value()->as_register(), skip);
+ __ test_null_free_array_oop(op->array()->as_register(), op->tmp()->as_register(), *op->stub()->entry());
+ __ bind(skip);
+ }
+ }
+
+ void LIR_Assembler::emit_opNullFreeArrayCheck(LIR_OpNullFreeArrayCheck* op) {
+ // We are storing into an array that *may* be null-free (the declared type is
+ // Object[], abstract[], interface[] or VT.ref[]).
+ Label test_mark_word;
+ Register tmp = op->tmp()->as_register();
+ __ ldr(tmp, Address(op->array()->as_register(), oopDesc::mark_offset_in_bytes()));
+ __ tst(tmp, markWord::unlocked_value);
+ __ br(Assembler::NE, test_mark_word);
+ __ load_prototype_header(tmp, op->array()->as_register());
+ __ bind(test_mark_word);
+ __ tst(tmp, markWord::null_free_array_bit_in_place);
+ }
+
+ void LIR_Assembler::emit_opSubstitutabilityCheck(LIR_OpSubstitutabilityCheck* op) {
+ Label L_oops_equal;
+ Label L_oops_not_equal;
+ Label L_end;
+
+ Register left = op->left()->as_register();
+ Register right = op->right()->as_register();
+
+ __ cmp(left, right);
+ __ br(Assembler::EQ, L_oops_equal);
+
+ // (1) Null check -- if one of the operands is null, the other must not be null (because
+ // the two references are not equal), so they are not substitutable,
+ // FIXME: do null check only if the operand is nullable
+ {
+ __ cbz(left, L_oops_not_equal);
+ __ cbz(right, L_oops_not_equal);
+ }
+
+ ciKlass* left_klass = op->left_klass();
+ ciKlass* right_klass = op->right_klass();
+
+ // (2) Inline type check -- if either of the operands is not a inline type,
+ // they are not substitutable. We do this only if we are not sure that the
+ // operands are inline type
+ if ((left_klass == nullptr || right_klass == nullptr) ||// The klass is still unloaded, or came from a Phi node.
+ !left_klass->is_inlinetype() || !right_klass->is_inlinetype()) {
+ Register tmp1 = op->tmp1()->as_register();
+ __ mov(tmp1, markWord::inline_type_pattern);
+ __ ldr(rscratch1, Address(left, oopDesc::mark_offset_in_bytes()));
+ __ andr(tmp1, tmp1, rscratch1);
+ __ ldr(rscratch1, Address(right, oopDesc::mark_offset_in_bytes()));
+ __ andr(tmp1, tmp1, rscratch1);
+ __ cmp(tmp1, (u1)markWord::inline_type_pattern);
+ __ br(Assembler::NE, L_oops_not_equal);
+ }
+
+ // (3) Same klass check: if the operands are of different klasses, they are not substitutable.
+ if (left_klass != nullptr && left_klass->is_inlinetype() && left_klass == right_klass) {
+ // No need to load klass -- the operands are statically known to be the same inline klass.
+ __ b(*op->stub()->entry());
+ } else {
+ Register left_klass_op = op->left_klass_op()->as_register();
+ Register right_klass_op = op->right_klass_op()->as_register();
+
+ if (UseCompressedClassPointers) {
+ __ ldrw(left_klass_op, Address(left, oopDesc::klass_offset_in_bytes()));
+ __ ldrw(right_klass_op, Address(right, oopDesc::klass_offset_in_bytes()));
+ __ cmpw(left_klass_op, right_klass_op);
+ } else {
+ __ ldr(left_klass_op, Address(left, oopDesc::klass_offset_in_bytes()));
+ __ ldr(right_klass_op, Address(right, oopDesc::klass_offset_in_bytes()));
+ __ cmp(left_klass_op, right_klass_op);
+ }
+
+ __ br(Assembler::EQ, *op->stub()->entry()); // same klass -> do slow check
+ // fall through to L_oops_not_equal
+ }
+
+ __ bind(L_oops_not_equal);
+ move(op->not_equal_result(), op->result_opr());
+ __ b(L_end);
+
+ __ bind(L_oops_equal);
+ move(op->equal_result(), op->result_opr());
+ __ b(L_end);
+
+ // We've returned from the stub. R0 contains 0x0 IFF the two
+ // operands are not substitutable. (Don't compare against 0x1 in case the
+ // C compiler is naughty)
+ __ bind(*op->stub()->continuation());
+ __ cbz(r0, L_oops_not_equal); // (call_stub() == 0x0) -> not_equal
+ move(op->equal_result(), op->result_opr()); // (call_stub() != 0x0) -> equal
+ // fall-through
+ __ bind(L_end);
+ }
+
+
void LIR_Assembler::casw(Register addr, Register newval, Register cmpval) {
__ cmpxchg(addr, cmpval, newval, Assembler::word, /* acquire*/ true, /* release*/ true, /* weak*/ false, rscratch1);
__ cset(rscratch1, Assembler::NE);
__ membar(__ AnyAny);
}
address call = __ trampoline_call(Address(op->addr(), rtype));
if (call == nullptr) {
bailout("trampoline stub overflow");
return;
}
- add_call_info(code_offset(), op->info());
+ add_call_info(code_offset(), op->info(), op->maybe_return_as_fields());
__ post_call_nop();
}
void LIR_Assembler::ic_call(LIR_OpJavaCall* op) {
address call = __ ic_call(op->addr());
if (call == nullptr) {
bailout("trampoline stub overflow");
return;
}
- add_call_info(code_offset(), op->info());
+ add_call_info(code_offset(), op->info(), op->maybe_return_as_fields());
__ post_call_nop();
}
void LIR_Assembler::emit_static_call_stub() {
address call_pc = __ pc();
assert(offset_from_rsp_in_bytes < frame_map()->reserved_argument_area_size(), "invalid offset");
__ lea(rscratch1, __ constant_oop_address(o));
__ str(rscratch1, Address(sp, offset_from_rsp_in_bytes));
}
+ void LIR_Assembler::arraycopy_inlinetype_check(Register obj, Register tmp, CodeStub* slow_path, bool is_dest, bool null_check) {
+ if (null_check) {
+ __ cbz(obj, *slow_path->entry());
+ }
+ if (is_dest) {
+ __ test_null_free_array_oop(obj, tmp, *slow_path->entry());
+ // TODO 8350865 Flat no longer implies null-free, so we need to check for flat dest. Can we do better here?
+ __ test_flat_array_oop(obj, tmp, *slow_path->entry());
+ } else {
+ __ test_flat_array_oop(obj, tmp, *slow_path->entry());
+ }
+ }
// This code replaces a call to arraycopy; no exception may
// be thrown in this code, they must be thrown in the System.arraycopy
// activation frame; we could save some checks if this would not be the case
void LIR_Assembler::emit_arraycopy(LIR_OpArrayCopy* op) {
CodeStub* stub = op->stub();
int flags = op->flags();
BasicType basic_type = default_type != nullptr ? default_type->element_type()->basic_type() : T_ILLEGAL;
if (is_reference_type(basic_type)) basic_type = T_OBJECT;
+ if (flags & LIR_OpArrayCopy::always_slow_path) {
+ __ b(*stub->entry());
+ __ bind(*stub->continuation());
+ return;
+ }
+
// if we don't know anything, just go through the generic arraycopy
if (default_type == nullptr // || basic_type == T_OBJECT
) {
Label done;
assert(src == r1 && src_pos == r2, "mismatch in calling convention");
__ bind(*stub->continuation());
return;
}
+ // Handle inline type arrays
+ if (flags & LIR_OpArrayCopy::src_inlinetype_check) {
+ arraycopy_inlinetype_check(src, tmp, stub, false, (flags & LIR_OpArrayCopy::src_null_check));
+ }
+ if (flags & LIR_OpArrayCopy::dst_inlinetype_check) {
+ arraycopy_inlinetype_check(dst, tmp, stub, true, (flags & LIR_OpArrayCopy::dst_null_check));
+ }
+
assert(default_type != nullptr && default_type->is_array_klass() && default_type->is_loaded(), "must be true at this point");
int elem_size = type2aelembytes(basic_type);
int scale = exact_log2(elem_size);
__ bind(next);
}
COMMENT("} emit_profile_type");
}
+ void LIR_Assembler::emit_profile_inline_type(LIR_OpProfileInlineType* op) {
+ Register obj = op->obj()->as_register();
+ Register tmp = op->tmp()->as_pointer_register();
+ bool not_null = op->not_null();
+ int flag = op->flag();
+
+ Label not_inline_type;
+ if (!not_null) {
+ __ cbz(obj, not_inline_type);
+ }
+
+ __ test_oop_is_not_inline_type(obj, tmp, not_inline_type);
+
+ Address mdo_addr = as_Address(op->mdp()->as_address_ptr(), rscratch2);
+ __ ldrb(rscratch1, mdo_addr);
+ __ orr(rscratch1, rscratch1, flag);
+ __ strb(rscratch1, mdo_addr);
+
+ __ bind(not_inline_type);
+ }
void LIR_Assembler::align_backward_branch_target() {
}
void LIR_Assembler::get_thread(LIR_Opr result_reg) {
__ mov(result_reg->as_register(), rthread);
}
+ void LIR_Assembler::check_orig_pc() {
+ __ ldr(rscratch2, frame_map()->address_for_orig_pc_addr());
+ __ cmp(rscratch2, (u1)NULL_WORD);
+ }
void LIR_Assembler::peephole(LIR_List *lir) {
#if 0
if (tableswitch_count >= max_tableswitches)
return;
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