src/hotspot/cpu/aarch64/c1_LIRGenerator_aarch64.cpp

@@ -31,10 +31,11 @@
  #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/ciInlineKlass.hpp"
  #include "ci/ciObjArrayKlass.hpp"
  #include "ci/ciTypeArrayKlass.hpp"
  #include "compiler/compilerDefinitions.inline.hpp"
  #include "runtime/sharedRuntime.hpp"
  #include "runtime/stubRoutines.hpp"

@@ -101,10 +102,16 @@
    set_vreg_flag(reg, LIRGenerator::byte_reg);
    return reg;
  }
  
  
+ void LIRGenerator::init_temps_for_substitutability_check(LIR_Opr& tmp1, LIR_Opr& tmp2) {
+   tmp1 = new_register(T_INT);
+   tmp2 = LIR_OprFact::illegalOpr;
+ }
+ 
+ 
  //--------- loading items into registers --------------------------------
  
  
  bool LIRGenerator::can_store_as_constant(Value v, BasicType type) const {
    if (v->type()->as_IntConstant() != nullptr) {

@@ -320,15 +327,21 @@
  
    CodeEmitInfo* info_for_exception = nullptr;
    if (x->needs_null_check()) {
      info_for_exception = state_for(x);
    }
+ 
+   CodeStub* throw_ie_stub =
+       x->maybe_inlinetype() ?
+       new SimpleExceptionStub(C1StubId::throw_identity_exception_id, obj.result(), state_for(x)) :
+       nullptr;
+ 
    // 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);
+                 x->monitor_no(), info_for_exception, info, throw_ie_stub);
  }
  
  
  void LIRGenerator::do_MonitorExit(MonitorExit* x) {
    assert(x->is_pinned(),"");

@@ -1126,18 +1139,19 @@
  #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());
+   CodeEmitInfo* info = state_for(x, x->needs_state_before() ? x->state_before() : x->state());
    LIR_Opr reg = result_register_for(x->type());
    new_instance(reg, x->klass(), x->is_unresolved(),
-                        FrameMap::r10_oop_opr,
-                        FrameMap::r11_oop_opr,
-                        FrameMap::r4_oop_opr,
-                        LIR_OprFact::illegalOpr,
-                        FrameMap::r3_metadata_opr, info);
+                /* allow_inline */ false,
+                FrameMap::r10_oop_opr,
+                FrameMap::r11_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) {

@@ -1189,17 +1203,18 @@
    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());
+   ciKlass* obj = (ciKlass*) x->exact_type();
+   CodeStub* slow_path = new NewObjectArrayStub(klass_reg, len, reg, info, x->is_null_free());
    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);
+   __ allocate_array(reg, len, tmp1, tmp2, tmp3, tmp4, T_OBJECT, klass_reg, slow_path, true, x->is_null_free());
  
    LIR_Opr result = rlock_result(x);
    __ move(reg, result);
  }
  

@@ -1271,10 +1286,13 @@
  
    // info for exceptions
    CodeEmitInfo* info_for_exception =
        (x->needs_exception_state() ? state_for(x) :
                                      state_for(x, x->state_before(), true /*ignore_xhandler*/));
+   if (x->is_null_free()) {
+     __ null_check(obj.result(), new CodeEmitInfo(info_for_exception));
+   }
  
    CodeStub* stub;
    if (x->is_incompatible_class_change_check()) {
      assert(patching_info == nullptr, "can't patch this");
      stub = new SimpleExceptionStub(C1StubId::throw_incompatible_class_change_error_id, LIR_OprFact::illegalOpr, info_for_exception);

@@ -1289,14 +1307,17 @@
    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());
+                x->profiled_method(), x->profiled_bci(), x->is_null_free());
+ 
  }
  
  void LIRGenerator::do_InstanceOf(InstanceOf* x) {
    LIRItem obj(x->obj(), this);
  

@@ -1370,11 +1391,16 @@
      increment_backedge_counter_conditionally(lir_cond(cond), left, right, state_for(x, x->state_before()),
          x->tsux()->bci(), x->fsux()->bci(), x->profiled_bci());
      __ safepoint(LIR_OprFact::illegalOpr, state_for(x, x->state_before()));
    }
  
-   __ cmp(lir_cond(cond), left, right);
+   if (x->substitutability_check()) {
+     substitutability_check(x, *xin, *yin);
+   } else {
+     __ 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), x->tsux(), x->usux());