diff -r 4ebc2e2fb97c -r 71c04702a3d5 src/hotspot/cpu/ppc/c1_CodeStubs_ppc.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/hotspot/cpu/ppc/c1_CodeStubs_ppc.cpp	Tue Sep 12 19:03:39 2017 +0200
@@ -0,0 +1,527 @@
+/*
+ * Copyright (c) 1999, 2015, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2012, 2015 SAP SE. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ *
+ */
+
+#include "precompiled.hpp"
+#include "c1/c1_CodeStubs.hpp"
+#include "c1/c1_FrameMap.hpp"
+#include "c1/c1_LIRAssembler.hpp"
+#include "c1/c1_MacroAssembler.hpp"
+#include "c1/c1_Runtime1.hpp"
+#include "nativeInst_ppc.hpp"
+#include "runtime/sharedRuntime.hpp"
+#include "utilities/macros.hpp"
+#include "vmreg_ppc.inline.hpp"
+#if INCLUDE_ALL_GCS
+#include "gc/g1/g1SATBCardTableModRefBS.hpp"
+#endif // INCLUDE_ALL_GCS
+
+#define __ ce->masm()->
+
+
+RangeCheckStub::RangeCheckStub(CodeEmitInfo* info, LIR_Opr index,
+                               bool throw_index_out_of_bounds_exception)
+  : _throw_index_out_of_bounds_exception(throw_index_out_of_bounds_exception)
+  , _index(index) {
+  assert(info != NULL, "must have info");
+  _info = new CodeEmitInfo(info);
+}
+
+void RangeCheckStub::emit_code(LIR_Assembler* ce) {
+  __ bind(_entry);
+
+  if (_info->deoptimize_on_exception()) {
+    address a = Runtime1::entry_for(Runtime1::predicate_failed_trap_id);
+    // May be used by optimizations like LoopInvariantCodeMotion or RangeCheckEliminator.
+    DEBUG_ONLY( __ untested("RangeCheckStub: predicate_failed_trap_id"); )
+    //__ load_const_optimized(R0, a);
+    __ add_const_optimized(R0, R29_TOC, MacroAssembler::offset_to_global_toc(a));
+    __ mtctr(R0);
+    __ bctrl();
+    ce->add_call_info_here(_info);
+    ce->verify_oop_map(_info);
+    debug_only(__ illtrap());
+    return;
+  }
+
+  address stub = _throw_index_out_of_bounds_exception ? Runtime1::entry_for(Runtime1::throw_index_exception_id)
+                                                      : Runtime1::entry_for(Runtime1::throw_range_check_failed_id);
+  //__ load_const_optimized(R0, stub);
+  __ add_const_optimized(R0, R29_TOC, MacroAssembler::offset_to_global_toc(stub));
+  __ mtctr(R0);
+
+  Register index = R0; // pass in R0
+  if (_index->is_register()) {
+    __ extsw(index, _index->as_register());
+  } else {
+    __ load_const_optimized(index, _index->as_jint());
+  }
+
+  __ bctrl();
+  ce->add_call_info_here(_info);
+  ce->verify_oop_map(_info);
+  debug_only(__ illtrap());
+}
+
+
+PredicateFailedStub::PredicateFailedStub(CodeEmitInfo* info) {
+  _info = new CodeEmitInfo(info);
+}
+
+void PredicateFailedStub::emit_code(LIR_Assembler* ce) {
+  __ bind(_entry);
+  address a = Runtime1::entry_for(Runtime1::predicate_failed_trap_id);
+  //__ load_const_optimized(R0, a);
+  __ add_const_optimized(R0, R29_TOC, MacroAssembler::offset_to_global_toc(a));
+  __ mtctr(R0);
+  __ bctrl();
+  ce->add_call_info_here(_info);
+  ce->verify_oop_map(_info);
+  debug_only(__ illtrap());
+}
+
+
+void CounterOverflowStub::emit_code(LIR_Assembler* ce) {
+  __ bind(_entry);
+
+  // Parameter 1: bci
+  __ load_const_optimized(R0, _bci);
+  __ std(R0, -16, R1_SP);
+
+  // Parameter 2: Method*
+  Metadata *m = _method->as_constant_ptr()->as_metadata();
+  AddressLiteral md = __ constant_metadata_address(m); // Notify OOP recorder (don't need the relocation).
+  __ load_const_optimized(R0, md.value());
+  __ std(R0, -8, R1_SP);
+
+  address a = Runtime1::entry_for(Runtime1::counter_overflow_id);
+  //__ load_const_optimized(R0, a);
+  __ add_const_optimized(R0, R29_TOC, MacroAssembler::offset_to_global_toc(a));
+  __ mtctr(R0);
+  __ bctrl();
+  ce->add_call_info_here(_info);
+  ce->verify_oop_map(_info);
+
+  __ b(_continuation);
+}
+
+
+void DivByZeroStub::emit_code(LIR_Assembler* ce) {
+  if (_offset != -1) {
+    ce->compilation()->implicit_exception_table()->append(_offset, __ offset());
+  }
+  __ bind(_entry);
+  address stub = Runtime1::entry_for(Runtime1::throw_div0_exception_id);
+  //__ load_const_optimized(R0, stub);
+  __ add_const_optimized(R0, R29_TOC, MacroAssembler::offset_to_global_toc(stub));
+  __ mtctr(R0);
+  __ bctrl();
+  ce->add_call_info_here(_info);
+  ce->verify_oop_map(_info);
+  debug_only(__ illtrap());
+}
+
+
+void ImplicitNullCheckStub::emit_code(LIR_Assembler* ce) {
+  address a;
+  if (_info->deoptimize_on_exception()) {
+    // Deoptimize, do not throw the exception, because it is probably wrong to do it here.
+    a = Runtime1::entry_for(Runtime1::predicate_failed_trap_id);
+  } else {
+    a = Runtime1::entry_for(Runtime1::throw_null_pointer_exception_id);
+  }
+
+  if (ImplicitNullChecks || TrapBasedNullChecks) {
+    ce->compilation()->implicit_exception_table()->append(_offset, __ offset());
+  }
+  __ bind(_entry);
+  //__ load_const_optimized(R0, a);
+  __ add_const_optimized(R0, R29_TOC, MacroAssembler::offset_to_global_toc(a));
+  __ mtctr(R0);
+  __ bctrl();
+  ce->add_call_info_here(_info);
+  ce->verify_oop_map(_info);
+  debug_only(__ illtrap());
+}
+
+
+// Implementation of SimpleExceptionStub
+void SimpleExceptionStub::emit_code(LIR_Assembler* ce) {
+  __ bind(_entry);
+  address stub = Runtime1::entry_for(_stub);
+  //__ load_const_optimized(R0, stub);
+  __ add_const_optimized(R0, R29_TOC, MacroAssembler::offset_to_global_toc(stub));
+  if (_obj->is_valid()) { __ mr_if_needed(/*tmp1 in do_CheckCast*/ R4_ARG2, _obj->as_register()); }
+  __ mtctr(R0);
+  __ bctrl();
+  ce->add_call_info_here(_info);
+  debug_only( __ illtrap(); )
+}
+
+
+// Implementation of NewInstanceStub
+NewInstanceStub::NewInstanceStub(LIR_Opr klass_reg, LIR_Opr result, ciInstanceKlass* klass, CodeEmitInfo* info, Runtime1::StubID stub_id) {
+  _result = result;
+  _klass = klass;
+  _klass_reg = klass_reg;
+  _info = new CodeEmitInfo(info);
+  assert(stub_id == Runtime1::new_instance_id                 ||
+         stub_id == Runtime1::fast_new_instance_id            ||
+         stub_id == Runtime1::fast_new_instance_init_check_id,
+         "need new_instance id");
+  _stub_id = stub_id;
+}
+
+void NewInstanceStub::emit_code(LIR_Assembler* ce) {
+  __ bind(_entry);
+
+  address entry = Runtime1::entry_for(_stub_id);
+  //__ load_const_optimized(R0, entry);
+  __ add_const_optimized(R0, R29_TOC, MacroAssembler::offset_to_global_toc(entry));
+  __ mtctr(R0);
+  __ bctrl();
+  ce->add_call_info_here(_info);
+  ce->verify_oop_map(_info);
+  __ b(_continuation);
+}
+
+
+// Implementation of NewTypeArrayStub
+NewTypeArrayStub::NewTypeArrayStub(LIR_Opr klass_reg, LIR_Opr length, LIR_Opr result, CodeEmitInfo* info) {
+  _klass_reg = klass_reg;
+  _length = length;
+  _result = result;
+  _info = new CodeEmitInfo(info);
+}
+
+void NewTypeArrayStub::emit_code(LIR_Assembler* ce) {
+  __ bind(_entry);
+
+  address entry = Runtime1::entry_for(Runtime1::new_type_array_id);
+  //__ load_const_optimized(R0, entry);
+  __ add_const_optimized(R0, R29_TOC, MacroAssembler::offset_to_global_toc(entry));
+  __ mr_if_needed(/*op->tmp1()->as_register()*/ R5_ARG3, _length->as_register()); // already sign-extended
+  __ mtctr(R0);
+  __ bctrl();
+  ce->add_call_info_here(_info);
+  ce->verify_oop_map(_info);
+  __ b(_continuation);
+}
+
+
+// Implementation of NewObjectArrayStub
+NewObjectArrayStub::NewObjectArrayStub(LIR_Opr klass_reg, LIR_Opr length, LIR_Opr result, CodeEmitInfo* info) {
+  _klass_reg = klass_reg;
+  _length = length;
+  _result = result;
+  _info = new CodeEmitInfo(info);
+}
+
+void NewObjectArrayStub::emit_code(LIR_Assembler* ce) {
+  __ bind(_entry);
+
+  address entry = Runtime1::entry_for(Runtime1::new_object_array_id);
+  //__ load_const_optimized(R0, entry);
+  __ add_const_optimized(R0, R29_TOC, MacroAssembler::offset_to_global_toc(entry));
+  __ mr_if_needed(/*op->tmp1()->as_register()*/ R5_ARG3, _length->as_register()); // already sign-extended
+  __ mtctr(R0);
+  __ bctrl();
+  ce->add_call_info_here(_info);
+  ce->verify_oop_map(_info);
+  __ b(_continuation);
+}
+
+
+// Implementation of MonitorAccessStubs
+MonitorEnterStub::MonitorEnterStub(LIR_Opr obj_reg, LIR_Opr lock_reg, CodeEmitInfo* info)
+  : MonitorAccessStub(obj_reg, lock_reg) {
+  _info = new CodeEmitInfo(info);
+}
+
+void MonitorEnterStub::emit_code(LIR_Assembler* ce) {
+  __ bind(_entry);
+  address stub = Runtime1::entry_for(ce->compilation()->has_fpu_code() ? Runtime1::monitorenter_id : Runtime1::monitorenter_nofpu_id);
+  //__ load_const_optimized(R0, stub);
+  __ add_const_optimized(R0, R29_TOC, MacroAssembler::offset_to_global_toc(stub));
+  __ mr_if_needed(/*scratch_opr()->as_register()*/ R4_ARG2, _obj_reg->as_register());
+  assert(_lock_reg->as_register() == R5_ARG3, "");
+  __ mtctr(R0);
+  __ bctrl();
+  ce->add_call_info_here(_info);
+  ce->verify_oop_map(_info);
+  __ b(_continuation);
+}
+
+void MonitorExitStub::emit_code(LIR_Assembler* ce) {
+  __ bind(_entry);
+  if (_compute_lock) {
+    ce->monitor_address(_monitor_ix, _lock_reg);
+  }
+  address stub = Runtime1::entry_for(ce->compilation()->has_fpu_code() ? Runtime1::monitorexit_id : Runtime1::monitorexit_nofpu_id);
+  //__ load_const_optimized(R0, stub);
+  __ add_const_optimized(R0, R29_TOC, MacroAssembler::offset_to_global_toc(stub));
+  assert(_lock_reg->as_register() == R4_ARG2, "");
+  __ mtctr(R0);
+  __ bctrl();
+  __ b(_continuation);
+}
+
+
+// Implementation of patching:
+// - Copy the code at given offset to an inlined buffer (first the bytes, then the number of bytes).
+// - Replace original code with a call to the stub.
+// At Runtime:
+// - call to stub, jump to runtime
+// - in runtime: preserve all registers (especially objects, i.e., source and destination object)
+// - in runtime: after initializing class, restore original code, reexecute instruction
+
+int PatchingStub::_patch_info_offset = -(5 * BytesPerInstWord);
+
+void PatchingStub::align_patch_site(MacroAssembler* ) {
+  // Patch sites on ppc are always properly aligned.
+}
+
+#ifdef ASSERT
+inline void compare_with_patch_site(address template_start, address pc_start, int bytes_to_copy) {
+  address start = template_start;
+  for (int i = 0; i < bytes_to_copy; i++) {
+    address ptr = (address)(pc_start + i);
+    int a_byte = (*ptr) & 0xFF;
+    assert(a_byte == *start++, "should be the same code");
+  }
+}
+#endif
+
+void PatchingStub::emit_code(LIR_Assembler* ce) {
+  // copy original code here
+  assert(NativeGeneralJump::instruction_size <= _bytes_to_copy && _bytes_to_copy <= 0xFF,
+         "not enough room for call");
+  assert((_bytes_to_copy & 0x3) == 0, "must copy a multiple of four bytes");
+
+  Label call_patch;
+
+  int being_initialized_entry = __ offset();
+
+  if (_id == load_klass_id) {
+    // Produce a copy of the load klass instruction for use by the being initialized case.
+    AddressLiteral addrlit((address)NULL, metadata_Relocation::spec(_index));
+    __ load_const(_obj, addrlit, R0);
+    DEBUG_ONLY( compare_with_patch_site(__ code_section()->start() + being_initialized_entry, _pc_start, _bytes_to_copy); )
+  } else if (_id == load_mirror_id || _id == load_appendix_id) {
+    // Produce a copy of the load mirror instruction for use by the being initialized case.
+    AddressLiteral addrlit((address)NULL, oop_Relocation::spec(_index));
+    __ load_const(_obj, addrlit, R0);
+    DEBUG_ONLY( compare_with_patch_site(__ code_section()->start() + being_initialized_entry, _pc_start, _bytes_to_copy); )
+  } else {
+    // Make a copy the code which is going to be patched.
+    for (int i = 0; i < _bytes_to_copy; i++) {
+      address ptr = (address)(_pc_start + i);
+      int a_byte = (*ptr) & 0xFF;
+      __ emit_int8 (a_byte);
+    }
+  }
+
+  address end_of_patch = __ pc();
+  int bytes_to_skip = 0;
+  if (_id == load_mirror_id) {
+    int offset = __ offset();
+    __ block_comment(" being_initialized check");
+
+    // Static field accesses have special semantics while the class
+    // initializer is being run so we emit a test which can be used to
+    // check that this code is being executed by the initializing
+    // thread.
+    assert(_obj != noreg, "must be a valid register");
+    assert(_index >= 0, "must have oop index");
+    __ mr(R0, _obj); // spill
+    __ ld(_obj, java_lang_Class::klass_offset_in_bytes(), _obj);
+    __ ld(_obj, in_bytes(InstanceKlass::init_thread_offset()), _obj);
+    __ cmpd(CCR0, _obj, R16_thread);
+    __ mr(_obj, R0); // restore
+    __ bne(CCR0, call_patch);
+
+    // Load_klass patches may execute the patched code before it's
+    // copied back into place so we need to jump back into the main
+    // code of the nmethod to continue execution.
+    __ b(_patch_site_continuation);
+
+    // Make sure this extra code gets skipped.
+    bytes_to_skip += __ offset() - offset;
+  }
+
+  // Now emit the patch record telling the runtime how to find the
+  // pieces of the patch.  We only need 3 bytes but it has to be
+  // aligned as an instruction so emit 4 bytes.
+  int sizeof_patch_record = 4;
+  bytes_to_skip += sizeof_patch_record;
+
+  // Emit the offsets needed to find the code to patch.
+  int being_initialized_entry_offset = __ offset() - being_initialized_entry + sizeof_patch_record;
+
+  // Emit the patch record.  We need to emit a full word, so emit an extra empty byte.
+  __ emit_int8(0);
+  __ emit_int8(being_initialized_entry_offset);
+  __ emit_int8(bytes_to_skip);
+  __ emit_int8(_bytes_to_copy);
+  address patch_info_pc = __ pc();
+  assert(patch_info_pc - end_of_patch == bytes_to_skip, "incorrect patch info");
+
+  address entry = __ pc();
+  NativeGeneralJump::insert_unconditional((address)_pc_start, entry);
+  address target = NULL;
+  relocInfo::relocType reloc_type = relocInfo::none;
+  switch (_id) {
+    case access_field_id:  target = Runtime1::entry_for(Runtime1::access_field_patching_id); break;
+    case load_klass_id:    target = Runtime1::entry_for(Runtime1::load_klass_patching_id);
+                           reloc_type = relocInfo::metadata_type; break;
+    case load_mirror_id:   target = Runtime1::entry_for(Runtime1::load_mirror_patching_id);
+                           reloc_type = relocInfo::oop_type; break;
+    case load_appendix_id: target = Runtime1::entry_for(Runtime1::load_appendix_patching_id);
+                           reloc_type = relocInfo::oop_type; break;
+    default: ShouldNotReachHere();
+  }
+  __ bind(call_patch);
+
+  __ block_comment("patch entry point");
+  //__ load_const(R0, target); + mtctr + bctrl must have size -_patch_info_offset
+  __ load_const32(R0, MacroAssembler::offset_to_global_toc(target));
+  __ add(R0, R29_TOC, R0);
+  __ mtctr(R0);
+  __ bctrl();
+  assert(_patch_info_offset == (patch_info_pc - __ pc()), "must not change");
+  ce->add_call_info_here(_info);
+  __ b(_patch_site_entry);
+  if (_id == load_klass_id || _id == load_mirror_id || _id == load_appendix_id) {
+    CodeSection* cs = __ code_section();
+    address pc = (address)_pc_start;
+    RelocIterator iter(cs, pc, pc + 1);
+    relocInfo::change_reloc_info_for_address(&iter, (address) pc, reloc_type, relocInfo::none);
+  }
+}
+
+
+void DeoptimizeStub::emit_code(LIR_Assembler* ce) {
+  __ bind(_entry);
+  address stub = Runtime1::entry_for(Runtime1::deoptimize_id);
+  //__ load_const_optimized(R0, stub);
+  __ add_const_optimized(R0, R29_TOC, MacroAssembler::offset_to_global_toc(stub));
+  __ mtctr(R0);
+
+  __ load_const_optimized(R0, _trap_request); // Pass trap request in R0.
+  __ bctrl();
+  ce->add_call_info_here(_info);
+  debug_only(__ illtrap());
+}
+
+
+void ArrayCopyStub::emit_code(LIR_Assembler* ce) {
+  //---------------slow case: call to native-----------------
+  __ bind(_entry);
+  __ mr(R3_ARG1, src()->as_register());
+  __ extsw(R4_ARG2, src_pos()->as_register());
+  __ mr(R5_ARG3, dst()->as_register());
+  __ extsw(R6_ARG4, dst_pos()->as_register());
+  __ extsw(R7_ARG5, length()->as_register());
+
+  ce->emit_static_call_stub();
+
+  bool success = ce->emit_trampoline_stub_for_call(SharedRuntime::get_resolve_static_call_stub());
+  if (!success) { return; }
+
+  __ relocate(relocInfo::static_call_type);
+  // Note: At this point we do not have the address of the trampoline
+  // stub, and the entry point might be too far away for bl, so __ pc()
+  // serves as dummy and the bl will be patched later.
+  __ code()->set_insts_mark();
+  __ bl(__ pc());
+  ce->add_call_info_here(info());
+  ce->verify_oop_map(info());
+
+#ifndef PRODUCT
+  const address counter = (address)&Runtime1::_arraycopy_slowcase_cnt;
+  const Register tmp = R3, tmp2 = R4;
+  int simm16_offs = __ load_const_optimized(tmp, counter, tmp2, true);
+  __ lwz(tmp2, simm16_offs, tmp);
+  __ addi(tmp2, tmp2, 1);
+  __ stw(tmp2, simm16_offs, tmp);
+#endif
+
+  __ b(_continuation);
+}
+
+
+///////////////////////////////////////////////////////////////////////////////////
+#if INCLUDE_ALL_GCS
+
+void G1PreBarrierStub::emit_code(LIR_Assembler* ce) {
+  // At this point we know that marking is in progress.
+  // If do_load() is true then we have to emit the
+  // load of the previous value; otherwise it has already
+  // been loaded into _pre_val.
+
+  __ bind(_entry);
+
+  assert(pre_val()->is_register(), "Precondition.");
+  Register pre_val_reg = pre_val()->as_register();
+
+  if (do_load()) {
+    ce->mem2reg(addr(), pre_val(), T_OBJECT, patch_code(), info(), false /*wide*/, false /*unaligned*/);
+  }
+
+  __ cmpdi(CCR0, pre_val_reg, 0);
+  __ bc_far_optimized(Assembler::bcondCRbiIs1, __ bi0(CCR0, Assembler::equal), _continuation);
+
+  address stub = Runtime1::entry_for(Runtime1::Runtime1::g1_pre_barrier_slow_id);
+  //__ load_const_optimized(R0, stub);
+  __ add_const_optimized(R0, R29_TOC, MacroAssembler::offset_to_global_toc(stub));
+  __ std(pre_val_reg, -8, R1_SP); // Pass pre_val on stack.
+  __ mtctr(R0);
+  __ bctrl();
+  __ b(_continuation);
+}
+
+void G1PostBarrierStub::emit_code(LIR_Assembler* ce) {
+  __ bind(_entry);
+
+  assert(addr()->is_register(), "Precondition.");
+  assert(new_val()->is_register(), "Precondition.");
+  Register addr_reg = addr()->as_pointer_register();
+  Register new_val_reg = new_val()->as_register();
+
+  __ cmpdi(CCR0, new_val_reg, 0);
+  __ bc_far_optimized(Assembler::bcondCRbiIs1, __ bi0(CCR0, Assembler::equal), _continuation);
+
+  address stub = Runtime1::entry_for(Runtime1::Runtime1::g1_post_barrier_slow_id);
+  //__ load_const_optimized(R0, stub);
+  __ add_const_optimized(R0, R29_TOC, MacroAssembler::offset_to_global_toc(stub));
+  __ mtctr(R0);
+  __ mr(R0, addr_reg); // Pass addr in R0.
+  __ bctrl();
+  __ b(_continuation);
+}
+
+#endif // INCLUDE_ALL_GCS
+///////////////////////////////////////////////////////////////////////////////////
+
+#undef __