Mercurial > jdk8-mips64-public > hotspot / file revision

 /*

  * Copyright (c) 1999, 2012, Oracle and/or its affiliates. All rights reserved.

  * Copyright 2008, 2009, 2010 Red Hat, Inc.

  * 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 "ci/ciMethod.hpp"

 #include "memory/resourceArea.hpp"

 #include "oops/method.hpp"

 #include "runtime/os.hpp"

 #include "runtime/synchronizer.hpp"

 #include "runtime/thread.hpp"

 #include "shark/llvmHeaders.hpp"

 #include "shark/llvmValue.hpp"

 #include "shark/sharkBuilder.hpp"

 #include "shark/sharkContext.hpp"

 #include "shark/sharkRuntime.hpp"

 #include "utilities/debug.hpp"

 using namespace llvm;

 SharkBuilder::SharkBuilder(SharkCodeBuffer* code_buffer)

   : IRBuilder<>(SharkContext::current()),

     _code_buffer(code_buffer) {

 }

 // Helpers for accessing structures

 Value* SharkBuilder::CreateAddressOfStructEntry(Value*      base,

                                                 ByteSize    offset,

                                                 const Type* type,

                                                 const char* name) {

   return CreateBitCast(CreateStructGEP(base, in_bytes(offset)), type, name);

 }

 LoadInst* SharkBuilder::CreateValueOfStructEntry(Value*      base,

                                                  ByteSize    offset,

                                                  const Type* type,

                                                  const char* name) {

   return CreateLoad(

     CreateAddressOfStructEntry(

       base, offset, PointerType::getUnqual(type)),

     name);

 }

 // Helpers for accessing arrays

 LoadInst* SharkBuilder::CreateArrayLength(Value* arrayoop) {

   return CreateValueOfStructEntry(

     arrayoop, in_ByteSize(arrayOopDesc::length_offset_in_bytes()),

     SharkType::jint_type(), "length");

 }

 Value* SharkBuilder::CreateArrayAddress(Value*      arrayoop,

                                         const Type* element_type,

                                         int         element_bytes,

                                         ByteSize    base_offset,

                                         Value*      index,

                                         const char* name) {

   Value* offset = CreateIntCast(index, SharkType::intptr_type(), false);

   if (element_bytes != 1)

     offset = CreateShl(

       offset,

       LLVMValue::intptr_constant(exact_log2(element_bytes)));

   offset = CreateAdd(

     LLVMValue::intptr_constant(in_bytes(base_offset)), offset);

   return CreateIntToPtr(

     CreateAdd(CreatePtrToInt(arrayoop, SharkType::intptr_type()), offset),

     PointerType::getUnqual(element_type),

     name);

 }

 Value* SharkBuilder::CreateArrayAddress(Value*      arrayoop,

                                         BasicType   basic_type,

                                         ByteSize    base_offset,

                                         Value*      index,

                                         const char* name) {

   return CreateArrayAddress(

     arrayoop,

     SharkType::to_arrayType(basic_type),

     type2aelembytes(basic_type),

     base_offset, index, name);

 }

 Value* SharkBuilder::CreateArrayAddress(Value*      arrayoop,

                                         BasicType   basic_type,

                                         Value*      index,

                                         const char* name) {

   return CreateArrayAddress(

     arrayoop, basic_type,

     in_ByteSize(arrayOopDesc::base_offset_in_bytes(basic_type)),

     index, name);

 }

 // Helpers for creating intrinsics and external functions.

 const Type* SharkBuilder::make_type(char type, bool void_ok) {

   switch (type) {

     // Primitive types

   case 'c':

     return SharkType::jbyte_type();

   case 'i':

     return SharkType::jint_type();

   case 'l':

     return SharkType::jlong_type();

   case 'x':

     return SharkType::intptr_type();

   case 'f':

     return SharkType::jfloat_type();

   case 'd':

     return SharkType::jdouble_type();

     // Pointers to primitive types

   case 'C':

   case 'I':

   case 'L':

   case 'X':

   case 'F':

   case 'D':

     return PointerType::getUnqual(make_type(tolower(type), false));

     // VM objects

   case 'T':

     return SharkType::thread_type();

   case 'M':

     return PointerType::getUnqual(SharkType::monitor_type());

   case 'O':

     return SharkType::oop_type();

     // Miscellaneous

   case 'v':

     assert(void_ok, "should be");

     return SharkType::void_type();

   case '1':

     return SharkType::bit_type();

   default:

     ShouldNotReachHere();

   }

 }

 const FunctionType* SharkBuilder::make_ftype(const char* params,

                                              const char* ret) {

   std::vector<const Type*> param_types;

   for (const char* c = params; *c; c++)

     param_types.push_back(make_type(*c, false));

   assert(strlen(ret) == 1, "should be");

   const Type *return_type = make_type(*ret, true);

   return FunctionType::get(return_type, param_types, false);

 }

 // Create an object representing an intrinsic or external function by

 // referencing the symbol by name.  This is the LLVM-style approach,

 // but it cannot be used on functions within libjvm.so its symbols

 // are not exported.  Note that you cannot make this work simply by

 // exporting the symbols, as some symbols have the same names as

 // symbols in the standard libraries (eg, atan2, fabs) and would

 // obscure them were they visible.

 Value* SharkBuilder::make_function(const char* name,

                                    const char* params,

                                    const char* ret) {

   return SharkContext::current().get_external(name, make_ftype(params, ret));

 }

 // Create an object representing an external function by inlining a

 // function pointer in the code.  This is not the LLVM way, but it's

 // the only way to access functions in libjvm.so and functions like

 // __kernel_dmb on ARM which is accessed via an absolute address.

 Value* SharkBuilder::make_function(address     func,

                                    const char* params,

                                    const char* ret) {

   return CreateIntToPtr(

     LLVMValue::intptr_constant((intptr_t) func),

     PointerType::getUnqual(make_ftype(params, ret)));

 }

 // VM calls

 Value* SharkBuilder::find_exception_handler() {

   return make_function(

     (address) SharkRuntime::find_exception_handler, "TIi", "i");

 }

 Value* SharkBuilder::monitorenter() {

   return make_function((address) SharkRuntime::monitorenter, "TM", "v");

 }

 Value* SharkBuilder::monitorexit() {

   return make_function((address) SharkRuntime::monitorexit, "TM", "v");

 }

 Value* SharkBuilder::new_instance() {

   return make_function((address) SharkRuntime::new_instance, "Ti", "v");

 }

 Value* SharkBuilder::newarray() {

   return make_function((address) SharkRuntime::newarray, "Tii", "v");

 }

 Value* SharkBuilder::anewarray() {

   return make_function((address) SharkRuntime::anewarray, "Tii", "v");

 }

 Value* SharkBuilder::multianewarray() {

   return make_function((address) SharkRuntime::multianewarray, "TiiI", "v");

 }

 Value* SharkBuilder::register_finalizer() {

   return make_function((address) SharkRuntime::register_finalizer, "TO", "v");

 }

 Value* SharkBuilder::safepoint() {

   return make_function((address) SafepointSynchronize::block, "T", "v");

 }

 Value* SharkBuilder::throw_ArithmeticException() {

   return make_function(

     (address) SharkRuntime::throw_ArithmeticException, "TCi", "v");

 }

 Value* SharkBuilder::throw_ArrayIndexOutOfBoundsException() {

   return make_function(

     (address) SharkRuntime::throw_ArrayIndexOutOfBoundsException, "TCii", "v");

 }

 Value* SharkBuilder::throw_ClassCastException() {

   return make_function(

     (address) SharkRuntime::throw_ClassCastException, "TCi", "v");

 }

 Value* SharkBuilder::throw_NullPointerException() {

   return make_function(

     (address) SharkRuntime::throw_NullPointerException, "TCi", "v");

 }

 // High-level non-VM calls

 Value* SharkBuilder::f2i() {

   return make_function((address) SharedRuntime::f2i, "f", "i");

 }

 Value* SharkBuilder::f2l() {

   return make_function((address) SharedRuntime::f2l, "f", "l");

 }

 Value* SharkBuilder::d2i() {

   return make_function((address) SharedRuntime::d2i, "d", "i");

 }

 Value* SharkBuilder::d2l() {

   return make_function((address) SharedRuntime::d2l, "d", "l");

 }

 Value* SharkBuilder::is_subtype_of() {

   return make_function((address) SharkRuntime::is_subtype_of, "OO", "c");

 }

 Value* SharkBuilder::current_time_millis() {

   return make_function((address) os::javaTimeMillis, "", "l");

 }

 Value* SharkBuilder::sin() {

   return make_function("llvm.sin.f64", "d", "d");

 }

 Value* SharkBuilder::cos() {

   return make_function("llvm.cos.f64", "d", "d");

 }

 Value* SharkBuilder::tan() {

   return make_function((address) ::tan, "d", "d");

 }

 Value* SharkBuilder::atan2() {

   return make_function((address) ::atan2, "dd", "d");

 }

 Value* SharkBuilder::sqrt() {

   return make_function("llvm.sqrt.f64", "d", "d");

 }

 Value* SharkBuilder::log() {

   return make_function("llvm.log.f64", "d", "d");

 }

 Value* SharkBuilder::log10() {

   return make_function("llvm.log10.f64", "d", "d");

 }

 Value* SharkBuilder::pow() {

   return make_function("llvm.pow.f64", "dd", "d");

 }

 Value* SharkBuilder::exp() {

   return make_function("llvm.exp.f64", "d", "d");

 }

 Value* SharkBuilder::fabs() {

   return make_function((address) ::fabs, "d", "d");

 }

 Value* SharkBuilder::unsafe_field_offset_to_byte_offset() {

   extern jlong Unsafe_field_offset_to_byte_offset(jlong field_offset);

   return make_function((address) Unsafe_field_offset_to_byte_offset, "l", "l");

 }

 Value* SharkBuilder::osr_migration_end() {

   return make_function((address) SharedRuntime::OSR_migration_end, "C", "v");

 }

 // Semi-VM calls

 Value* SharkBuilder::throw_StackOverflowError() {

   return make_function((address) ZeroStack::handle_overflow, "T", "v");

 }

 Value* SharkBuilder::uncommon_trap() {

   return make_function((address) SharkRuntime::uncommon_trap, "Ti", "i");

 }

 Value* SharkBuilder::deoptimized_entry_point() {

   return make_function((address) CppInterpreter::main_loop, "iT", "v");

 }

 // Native-Java transition

 Value* SharkBuilder::check_special_condition_for_native_trans() {

   return make_function(

     (address) JavaThread::check_special_condition_for_native_trans,

     "T", "v");

 }

 // Low-level non-VM calls

 // The ARM-specific code here is to work around unimplemented

 // atomic exchange and memory barrier intrinsics in LLVM.

 //

 // Delegating to external functions for these would normally

 // incur a speed penalty, but Linux on ARM is a special case

 // in that atomic operations on that platform are handled by

 // external functions anyway.  It would be *preferable* for

 // the calls to be hidden away in LLVM, but it's not hurting

 // performance so having the calls here is acceptable.

 //

 // If you are building Shark on a platform without atomic

 // exchange and/or memory barrier intrinsics then it is only

 // acceptable to mimic this approach if your platform cannot

 // perform these operations without delegating to a function.

 #ifdef ARM

 static jint zero_cmpxchg_int(volatile jint *ptr, jint oldval, jint newval) {

   return Atomic::cmpxchg(newval, ptr, oldval);

 }

 #endif // ARM

 Value* SharkBuilder::cmpxchg_int() {

   return make_function(

 #ifdef ARM

     (address) zero_cmpxchg_int,

 #else

     "llvm.atomic.cmp.swap.i32.p0i32",

 #endif // ARM

     "Iii", "i");

 }

 #ifdef ARM

 static intptr_t zero_cmpxchg_ptr(volatile intptr_t* ptr,

                                  intptr_t           oldval,

                                  intptr_t           newval) {

   return Atomic::cmpxchg_ptr(newval, ptr, oldval);

 }

 #endif // ARM

 Value* SharkBuilder::cmpxchg_ptr() {

   return make_function(

 #ifdef ARM

     (address) zero_cmpxchg_ptr,

 #else

     "llvm.atomic.cmp.swap.i" LP64_ONLY("64") NOT_LP64("32") ".p0i" LP64_ONLY("64") NOT_LP64("32"),

 #endif // ARM

     "Xxx", "x");

 }

 Value* SharkBuilder::frame_address() {

   return make_function("llvm.frameaddress", "i", "C");

 }

 Value* SharkBuilder::memory_barrier() {

   return make_function(

 #ifdef ARM

     (address) 0xffff0fa0, // __kernel_dmb

 #else

     "llvm.memory.barrier",

 #endif // ARM

     "11111", "v");

 }

 Value* SharkBuilder::memset() {

 #if SHARK_LLVM_VERSION >= 28

   // LLVM 2.8 added a fifth isVolatile field for memset

   // introduced with LLVM r100304

   return make_function("llvm.memset.i32", "Cciii", "v");

 #else

   return make_function("llvm.memset.i32", "Ccii", "v");

 #endif

 }

 Value* SharkBuilder::unimplemented() {

   return make_function((address) report_unimplemented, "Ci", "v");

 }

 Value* SharkBuilder::should_not_reach_here() {

   return make_function((address) report_should_not_reach_here, "Ci", "v");

 }

 Value* SharkBuilder::dump() {

   return make_function((address) SharkRuntime::dump, "Cx", "v");

 }

 // Public interface to low-level non-VM calls

 CallInst* SharkBuilder::CreateCmpxchgInt(Value* exchange_value,

                                          Value* dst,

                                          Value* compare_value) {

   return CreateCall3(cmpxchg_int(), dst, compare_value, exchange_value);

 }

 CallInst* SharkBuilder::CreateCmpxchgPtr(Value* exchange_value,

                                          Value* dst,

                                          Value* compare_value) {

   return CreateCall3(cmpxchg_ptr(), dst, compare_value, exchange_value);

 }

 CallInst* SharkBuilder::CreateGetFrameAddress() {

   return CreateCall(frame_address(), LLVMValue::jint_constant(0));

 }

 CallInst *SharkBuilder::CreateMemoryBarrier(int flags) {

   Value *args[] = {

     LLVMValue::bit_constant((flags & BARRIER_LOADLOAD) ? 1 : 0),

     LLVMValue::bit_constant((flags & BARRIER_LOADSTORE) ? 1 : 0),

     LLVMValue::bit_constant((flags & BARRIER_STORELOAD) ? 1 : 0),

     LLVMValue::bit_constant((flags & BARRIER_STORESTORE) ? 1 : 0),

     LLVMValue::bit_constant(1)};

   return CreateCall(memory_barrier(), args, args + 5);

 }

 CallInst* SharkBuilder::CreateMemset(Value* dst,

                                      Value* value,

                                      Value* len,

                                      Value* align) {

 #if SHARK_LLVM_VERSION >= 28

   return CreateCall5(memset(), dst, value, len, align,

                      LLVMValue::jint_constant(0));

 #else

   return CreateCall4(memset(), dst, value, len, align);

 #endif

 }

 CallInst* SharkBuilder::CreateUnimplemented(const char* file, int line) {

   return CreateCall2(

     unimplemented(),

     CreateIntToPtr(

       LLVMValue::intptr_constant((intptr_t) file),

       PointerType::getUnqual(SharkType::jbyte_type())),

     LLVMValue::jint_constant(line));

 }

 CallInst* SharkBuilder::CreateShouldNotReachHere(const char* file, int line) {

   return CreateCall2(

     should_not_reach_here(),

     CreateIntToPtr(

       LLVMValue::intptr_constant((intptr_t) file),

       PointerType::getUnqual(SharkType::jbyte_type())),

     LLVMValue::jint_constant(line));

 }

 #ifndef PRODUCT

 CallInst* SharkBuilder::CreateDump(Value* value) {

   const char *name;

   if (value->hasName())

     // XXX this leaks, but it's only debug code

     name = strdup(value->getName().str().c_str());

   else

     name = "unnamed_value";

   if (isa<PointerType>(value->getType()))

     value = CreatePtrToInt(value, SharkType::intptr_type());

   else if (value->getType()->

 #if SHARK_LLVM_VERSION >= 27

            isIntegerTy()

 #else

            isInteger()

 #endif

            )

     value = CreateIntCast(value, SharkType::intptr_type(), false);

   else

     Unimplemented();

   return CreateCall2(

     dump(),

     CreateIntToPtr(

       LLVMValue::intptr_constant((intptr_t) name),

       PointerType::getUnqual(SharkType::jbyte_type())),

     value);

 }

 #endif // PRODUCT

 // HotSpot memory barriers

 void SharkBuilder::CreateUpdateBarrierSet(BarrierSet* bs, Value* field) {

   if (bs->kind() != BarrierSet::CardTableModRef)

     Unimplemented();

   CreateStore(

     LLVMValue::jbyte_constant(CardTableModRefBS::dirty_card),

     CreateIntToPtr(

       CreateAdd(

         LLVMValue::intptr_constant(

           (intptr_t) ((CardTableModRefBS *) bs)->byte_map_base),

         CreateLShr(

           CreatePtrToInt(field, SharkType::intptr_type()),

           LLVMValue::intptr_constant(CardTableModRefBS::card_shift))),

       PointerType::getUnqual(SharkType::jbyte_type())));

 }

 // Helpers for accessing the code buffer

 Value* SharkBuilder::code_buffer_address(int offset) {

   return CreateAdd(

     code_buffer()->base_pc(),

     LLVMValue::intptr_constant(offset));

 }

 Value* SharkBuilder::CreateInlineOop(jobject object, const char* name) {

   return CreateLoad(

     CreateIntToPtr(

       code_buffer_address(code_buffer()->inline_oop(object)),

       PointerType::getUnqual(SharkType::oop_type())),

     name);

 }

 Value* SharkBuilder::CreateInlineData(void*       data,

                                       size_t      size,

                                       const Type* type,

                                       const char* name) {

   return CreateIntToPtr(

     code_buffer_address(code_buffer()->inline_data(data, size)),

     type,

     name);

 }

 // Helpers for creating basic blocks.

 BasicBlock* SharkBuilder::GetBlockInsertionPoint() const {

   BasicBlock *cur = GetInsertBlock();

   // BasicBlock::Create takes an insertBefore argument, so

   // we need to find the block _after_ the current block

   Function::iterator iter = cur->getParent()->begin();

   Function::iterator end  = cur->getParent()->end();

   while (iter != end) {

     iter++;

     if (&*iter == cur) {

       iter++;

       break;

     }

   }

   if (iter == end)

     return NULL;

   else

     return iter;

 }

 BasicBlock* SharkBuilder::CreateBlock(BasicBlock* ip, const char* name) const {

   return BasicBlock::Create(

     SharkContext::current(), name, GetInsertBlock()->getParent(), ip);

 }