8008242: VerifyOops is broken on SPARC

Summary: Fixed displacement issues in SPARC macroassembler and ensure that getClass intrinsic temporary result is T_METADATA
Reviewed-by: kvn, twisti

hotspot/src/cpu/sparc/vm/c1_LIRAssembler_sparc.cpp

@@ -2565,7 +2565,7 @@ void LIR_Assembler::type_profile_helper(Register mdo, int mdo_offset_bias,
     Address receiver_addr(mdo, md->byte_offset_of_slot(data, ReceiverTypeData::receiver_offset(i)) -
                           mdo_offset_bias);
     __ ld_ptr(receiver_addr, tmp1);
-    __ verify_oop(tmp1);
+    __ verify_klass_ptr(tmp1);
     __ cmp_and_brx_short(recv, tmp1, Assembler::notEqual, Assembler::pt, next_test);
     Address data_addr(mdo, md->byte_offset_of_slot(data, ReceiverTypeData::receiver_count_offset(i)) -
                       mdo_offset_bias);

hotspot/src/cpu/sparc/vm/c1_Runtime1_sparc.cpp

@@ -404,7 +404,9 @@ OopMapSet* Runtime1::generate_code_for(StubID id, StubAssembler* sasm) {
           if (id == fast_new_instance_init_check_id) {
             // make sure the klass is initialized
             __ ldub(G5_klass, in_bytes(InstanceKlass::init_state_offset()), G3_t1);
-            __ cmp_and_br_short(G3_t1, InstanceKlass::fully_initialized, Assembler::notEqual, Assembler::pn, slow_path);
+            __ cmp(G3_t1, InstanceKlass::fully_initialized);
+            __ br(Assembler::notEqual, false, Assembler::pn, slow_path);
+            __ delayed()->nop();
           }
 #ifdef ASSERT
           // assert object can be fast path allocated
@@ -515,7 +517,9 @@ OopMapSet* Runtime1::generate_code_for(StubID id, StubAssembler* sasm) {
 
           // check that array length is small enough for fast path
           __ set(C1_MacroAssembler::max_array_allocation_length, G3_t1);
-          __ cmp_and_br_short(G4_length, G3_t1, Assembler::greaterUnsigned, Assembler::pn, slow_path);
+          __ cmp(G4_length, G3_t1);
+          __ br(Assembler::greaterUnsigned, false, Assembler::pn, slow_path);
+          __ delayed()->nop();
 
           // if we got here then the TLAB allocation failed, so try
           // refilling the TLAB or allocating directly from eden.

hotspot/src/cpu/sparc/vm/macroAssembler_sparc.cpp

@@ -3333,7 +3333,8 @@ void MacroAssembler::tlab_refill(Label& retry, Label& try_eden, Label& slow_case
 
   if (CMSIncrementalMode || !Universe::heap()->supports_inline_contig_alloc()) {
     // No allocation in the shared eden.
-    ba_short(slow_case);
+    ba(slow_case);
+    delayed()->nop();
   }
 
   ld_ptr(G2_thread, in_bytes(JavaThread::tlab_top_offset()), top);
@@ -3358,7 +3359,8 @@ void MacroAssembler::tlab_refill(Label& retry, Label& try_eden, Label& slow_case
     add(t2, 1, t2);
     stw(t2, G2_thread, in_bytes(JavaThread::tlab_slow_allocations_offset()));
   }
-  ba_short(try_eden);
+  ba(try_eden);
+  delayed()->nop();
 
   bind(discard_tlab);
   if (TLABStats) {
@@ -3420,7 +3422,8 @@ void MacroAssembler::tlab_refill(Label& retry, Label& try_eden, Label& slow_case
   sub(top, ThreadLocalAllocBuffer::alignment_reserve_in_bytes(), top);
   st_ptr(top, G2_thread, in_bytes(JavaThread::tlab_end_offset()));
   verify_tlab();
-  ba_short(retry);
+  ba(retry);
+  delayed()->nop();
 }
 
 void MacroAssembler::incr_allocated_bytes(RegisterOrConstant size_in_bytes,

hotspot/src/cpu/x86/vm/c1_LIRAssembler_x86.cpp

@@ -1206,6 +1206,10 @@ void LIR_Assembler::mem2reg(LIR_Opr src, LIR_Opr dest, BasicType type, LIR_Patch
   LIR_Address* addr = src->as_address_ptr();
   Address from_addr = as_Address(addr);
 
+  if (addr->base()->type() == T_OBJECT) {
+    __ verify_oop(addr->base()->as_pointer_register());
+  }
+
   switch (type) {
     case T_BOOLEAN: // fall through
     case T_BYTE:    // fall through

hotspot/src/share/vm/c1/c1_LIRGenerator.cpp

@@ -1265,6 +1265,7 @@ void LIRGenerator::do_getClass(Intrinsic* x) {
 
   LIRItem rcvr(x->argument_at(0), this);
   rcvr.load_item();
+  LIR_Opr temp = new_register(T_METADATA);
   LIR_Opr result = rlock_result(x);
 
   // need to perform the null check on the rcvr
@@ -1272,8 +1273,11 @@ void LIRGenerator::do_getClass(Intrinsic* x) {
   if (x->needs_null_check()) {
     info = state_for(x);
   }
-  __ move(new LIR_Address(rcvr.result(), oopDesc::klass_offset_in_bytes(), T_ADDRESS), result, info);
-  __ move_wide(new LIR_Address(result, in_bytes(Klass::java_mirror_offset()), T_OBJECT), result);
+
+  // FIXME T_ADDRESS should actually be T_METADATA but it can't because the
+  // meaning of these two is mixed up (see JDK-8026837).
+  __ move(new LIR_Address(rcvr.result(), oopDesc::klass_offset_in_bytes(), T_ADDRESS), temp, info);
+  __ move_wide(new LIR_Address(temp, in_bytes(Klass::java_mirror_offset()), T_OBJECT), result);
 }