< prev index next > src/hotspot/share/gc/shared/c1/barrierSetC1.hpp
BarrierSetC1_v3
BarrierSetC1_v2
#include "memory/allocation.hpp"
class LIRGenerator;
class LIRItem;
+// The LIRAddressOpr comprises either a LIRItem or a LIR_Opr to describe elements
+// of an access in the C1 Access API. Both of them allow asking for the opr() which
+// will correspond to either _item.result() or _opr if there is no _item.
+class LIRAddressOpr: public StackObj {
+ LIRItem* _item;
+ LIR_Opr _opr;
+public:
+ LIRAddressOpr(LIRItem& item) : _item(&item), _opr(NULL) {}
+ LIRAddressOpr(LIR_Opr opr) : _item(NULL), _opr(opr) {}
+ LIRAddressOpr(const LIRAddressOpr& other) : _item(other._item), _opr(other._opr) {}
+
+ LIRItem& item() const {
+ assert(_item != NULL, "sanity");
+ return *_item;
+ }
+
+ LIR_Opr opr() const {
+ if (_item == NULL) {
+ return _opr;
+ } else {
+ return _item->result();
+ }
+ }
+};
+
+// The LIRAccess class wraps shared context parameters required for performing
+// the right access in C1. This includes the address of the offset and the decorators.
+class LIRAccess: public StackObj {
+ LIRGenerator* _gen;
+ DecoratorSet _decorators;
+ LIRAddressOpr _base;
+ LIRAddressOpr _offset;
+ BasicType _type;
+ LIR_Opr _resolved_addr;
+ CodeEmitInfo* _patch_info;
+ CodeEmitInfo* _access_emit_info;
+
+public:
+ LIRAccess(LIRGenerator* gen, DecoratorSet decorators,
+ LIRAddressOpr base, LIRAddressOpr offset, BasicType type,
+ CodeEmitInfo* patch_info = NULL, CodeEmitInfo* access_emit_info = NULL) :
+ _gen(gen),
+ _decorators(AccessInternal::decorator_fixup(decorators)),
+ _base(base),
+ _offset(offset),
+ _type(type),
+ _resolved_addr(NULL),
+ _patch_info(patch_info),
+ _access_emit_info(access_emit_info) {}
+
+ void load_base() { _base.item().load_item(); }
+ void load_offset() { _offset.item().load_nonconstant(); }
+
+ void load_address() {
+ load_base();
+ load_offset();
+ }
+
+ LIRGenerator* gen() const { return _gen; }
+ CodeEmitInfo*& patch_info() { return _patch_info; }
+ CodeEmitInfo*& access_emit_info() { return _access_emit_info; }
+ LIRAddressOpr& base() { return _base; }
+ LIRAddressOpr& offset() { return _offset; }
+ BasicType type() const { return _type; }
+ LIR_Opr resolved_addr() const { return _resolved_addr; }
+ void set_resolved_addr(LIR_Opr addr) { _resolved_addr = addr; }
+ bool is_oop() const { return _type == T_ARRAY || _type == T_OBJECT; }
+ DecoratorSet decorators() const { return _decorators; }
+ bool is_raw() const { return (_decorators & AS_RAW) != 0; }
+};
+
+// The BarrierSetC1 class is the main entry point for the GC backend of the Access API in C1.
+// It is called by the LIRGenerator::access_* functions, which is the main entry poing for
+// access calls in C1.
+
class BarrierSetC1: public CHeapObj<mtGC> {
protected:
- virtual LIR_Opr resolve_address(LIRGenerator* lir_generator, DecoratorSet decorators, BasicType type,
- LIRItem& base, LIR_Opr offset, bool resolve_in_register);
+ virtual LIR_Opr resolve_address(LIRAccess& access, bool resolve_in_register);
- virtual void generate_referent_check(LIRGenerator* lir_generator, LIRItem& base, LIR_Opr offset, LabelObj* cont);
+ virtual void generate_referent_check(LIRAccess& access, LabelObj* cont);
// Accesses with resolved address
- virtual void store_at_resolved(LIRGenerator* lir_generator, DecoratorSet decorators, BasicType type,
- LIR_Opr addr, LIRItem& base, LIR_Opr offset, LIR_Opr value,
- CodeEmitInfo* patch_info, CodeEmitInfo* store_emit_info);
-
- virtual void load_at_resolved(LIRGenerator* lir_generator, DecoratorSet decorators, BasicType type,
- LIR_Opr addr, LIRItem& base, LIR_Opr offset, LIR_Opr result,
- CodeEmitInfo* patch_info, CodeEmitInfo* load_emit_info);
+ virtual void store_at_resolved(LIRAccess& access, LIR_Opr value);
+ virtual void load_at_resolved(LIRAccess& access, LIR_Opr result);
- virtual LIR_Opr atomic_cmpxchg_resolved(LIRGenerator* lir_generator, DecoratorSet decorators, BasicType type,
- LIR_Opr addr, LIRItem& base, LIRItem& offset, LIRItem& cmp_value, LIRItem& new_value);
+ virtual LIR_Opr atomic_cmpxchg_resolved(LIRAccess& access, LIRItem& cmp_value, LIRItem& new_value);
- virtual LIR_Opr atomic_xchg_resolved(LIRGenerator* lir_generator, DecoratorSet decorators, BasicType type,
- LIR_Opr addr, LIRItem& base, LIRItem& offset, LIRItem& value);
-
- virtual LIR_Opr atomic_add_at_resolved(LIRGenerator* lir_generator, DecoratorSet decorators, BasicType type,
- LIR_Opr addr, LIRItem& base, LIRItem& offset, LIRItem& value);
+ virtual LIR_Opr atomic_xchg_resolved(LIRAccess& access, LIRItem& value);
+ virtual LIR_Opr atomic_add_at_resolved(LIRAccess& access, LIRItem& value);
public:
- virtual void store_at(LIRGenerator* lir_generator, DecoratorSet decorators, BasicType type,
- LIRItem& base, LIR_Opr offset, LIR_Opr value,
- CodeEmitInfo* patch_info, CodeEmitInfo* store_emit_info);
-
- virtual void load_at(LIRGenerator* lir_generator, DecoratorSet decorators, BasicType type,
- LIRItem& base, LIR_Opr offset, LIR_Opr result,
- CodeEmitInfo* patch_info, CodeEmitInfo* load_emit_info);
-
- virtual LIR_Opr atomic_cmpxchg_at(LIRGenerator* lir_generator, DecoratorSet decorators, BasicType type,
- LIRItem& base, LIRItem& offset, LIRItem& cmp_value, LIRItem& new_value);
+ virtual void store_at(LIRAccess& access, LIR_Opr value);
+ virtual void load_at(LIRAccess& access, LIR_Opr result);
- virtual LIR_Opr atomic_xchg(LIRGenerator* lir_generator, DecoratorSet decorators, BasicType type,
- LIRItem& base, LIRItem& offset, LIRItem& value);
+ virtual LIR_Opr atomic_cmpxchg_at(LIRAccess& access, LIRItem& cmp_value, LIRItem& new_value);
- virtual LIR_Opr atomic_add_at(LIRGenerator* lir_generator, DecoratorSet decorators, BasicType type,
- LIRItem& base, LIRItem& offset, LIRItem& value);
+ virtual LIR_Opr atomic_xchg(LIRAccess& access, LIRItem& value);
+ virtual LIR_Opr atomic_add_at(LIRAccess& access, LIRItem& value);
virtual void generate_c1_runtime_stubs(BufferBlob* buffer_blob) {}
};
#endif // SHARE_GC_SHARED_C1_BARRIERSETC1_HPP
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