< prev index next >

src/hotspot/share/c1/c1_LIRGenerator.cpp

Print this page 
rev 52693 : 8214352: C1: Unnecessary "compilation bailout: block join failed" with JVMTI
Summary: Invalidate Phi functions for conflicting types and avoid bailout.
Reviewed-by:


1096 }
1097 
1098 
1099 //---------------------------------------------------------------------
1100 ciObject* LIRGenerator::get_jobject_constant(Value value) {
1101   ObjectType* oc = value->type()->as_ObjectType();
1102   if (oc) {
1103     return oc->constant_value();
1104   }
1105   return NULL;
1106 }
1107 
1108 
1109 void LIRGenerator::do_ExceptionObject(ExceptionObject* x) {
1110   assert(block()->is_set(BlockBegin::exception_entry_flag), "ExceptionObject only allowed in exception handler block");
1111   assert(block()->next() == x, "ExceptionObject must be first instruction of block");
1112 
1113   // no moves are created for phi functions at the begin of exception
1114   // handlers, so assign operands manually here
1115   for_each_phi_fun(block(), phi,
1116                    operand_for_instruction(phi));
1117 
1118   LIR_Opr thread_reg = getThreadPointer();
1119   __ move_wide(new LIR_Address(thread_reg, in_bytes(JavaThread::exception_oop_offset()), T_OBJECT),
1120                exceptionOopOpr());
1121   __ move_wide(LIR_OprFact::oopConst(NULL),
1122                new LIR_Address(thread_reg, in_bytes(JavaThread::exception_oop_offset()), T_OBJECT));
1123   __ move_wide(LIR_OprFact::oopConst(NULL),
1124                new LIR_Address(thread_reg, in_bytes(JavaThread::exception_pc_offset()), T_OBJECT));
1125 
1126   LIR_Opr result = new_register(T_OBJECT);
1127   __ move(exceptionOopOpr(), result);
1128   set_result(x, result);
1129 }
1130 
1131 
1132 //----------------------------------------------------------------------
1133 //----------------------------------------------------------------------
1134 //----------------------------------------------------------------------
1135 //----------------------------------------------------------------------
1136 //                        visitor functions




1096 }
1097 
1098 
1099 //---------------------------------------------------------------------
1100 ciObject* LIRGenerator::get_jobject_constant(Value value) {
1101   ObjectType* oc = value->type()->as_ObjectType();
1102   if (oc) {
1103     return oc->constant_value();
1104   }
1105   return NULL;
1106 }
1107 
1108 
1109 void LIRGenerator::do_ExceptionObject(ExceptionObject* x) {
1110   assert(block()->is_set(BlockBegin::exception_entry_flag), "ExceptionObject only allowed in exception handler block");
1111   assert(block()->next() == x, "ExceptionObject must be first instruction of block");
1112 
1113   // no moves are created for phi functions at the begin of exception
1114   // handlers, so assign operands manually here
1115   for_each_phi_fun(block(), phi,
1116                    if (!phi->is_illegal()) { operand_for_instruction(phi); });
1117 
1118   LIR_Opr thread_reg = getThreadPointer();
1119   __ move_wide(new LIR_Address(thread_reg, in_bytes(JavaThread::exception_oop_offset()), T_OBJECT),
1120                exceptionOopOpr());
1121   __ move_wide(LIR_OprFact::oopConst(NULL),
1122                new LIR_Address(thread_reg, in_bytes(JavaThread::exception_oop_offset()), T_OBJECT));
1123   __ move_wide(LIR_OprFact::oopConst(NULL),
1124                new LIR_Address(thread_reg, in_bytes(JavaThread::exception_pc_offset()), T_OBJECT));
1125 
1126   LIR_Opr result = new_register(T_OBJECT);
1127   __ move(exceptionOopOpr(), result);
1128   set_result(x, result);
1129 }
1130 
1131 
1132 //----------------------------------------------------------------------
1133 //----------------------------------------------------------------------
1134 //----------------------------------------------------------------------
1135 //----------------------------------------------------------------------
1136 //                        visitor functions
< prev index next >