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      1 /*
      2  * Copyright (C) 2012 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 
     17 #include "ir_builder.h"
     18 
     19 #include "base/stringprintf.h"
     20 
     21 #include <llvm/IR/Module.h>
     22 
     23 namespace art {
     24 namespace llvm {
     25 
     26 
     27 //----------------------------------------------------------------------------
     28 // General
     29 //----------------------------------------------------------------------------
     30 
     31 IRBuilder::IRBuilder(::llvm::LLVMContext& context, ::llvm::Module& module,
     32                      IntrinsicHelper& intrinsic_helper)
     33     : LLVMIRBuilder(context), module_(&module), mdb_(context), java_object_type_(NULL),
     34       java_method_type_(NULL), java_thread_type_(NULL), intrinsic_helper_(intrinsic_helper) {
     35   // Get java object type from module
     36   ::llvm::Type* jobject_struct_type = module.getTypeByName("JavaObject");
     37   CHECK(jobject_struct_type != NULL);
     38   java_object_type_ = jobject_struct_type->getPointerTo();
     39 
     40   // If type of Method is not explicitly defined in the module, use JavaObject*
     41   ::llvm::Type* type = module.getTypeByName("Method");
     42   if (type != NULL) {
     43     java_method_type_ = type->getPointerTo();
     44   } else {
     45     java_method_type_ = java_object_type_;
     46   }
     47 
     48   // If type of Thread is not explicitly defined in the module, use JavaObject*
     49   type = module.getTypeByName("Thread");
     50   if (type != NULL) {
     51     java_thread_type_ = type->getPointerTo();
     52   } else {
     53     java_thread_type_ = java_object_type_;
     54   }
     55 
     56   // Create JEnv* type
     57   ::llvm::Type* jenv_struct_type = ::llvm::StructType::create(context, "JEnv");
     58   jenv_type_ = jenv_struct_type->getPointerTo();
     59 
     60   // Get Art shadow frame struct type from module
     61   art_frame_type_ = module.getTypeByName("ShadowFrame");
     62   CHECK(art_frame_type_ != NULL);
     63 
     64   runtime_support_ = NULL;
     65 }
     66 
     67 
     68 //----------------------------------------------------------------------------
     69 // Type Helper Function
     70 //----------------------------------------------------------------------------
     71 
     72 ::llvm::Type* IRBuilder::getJType(JType jty) {
     73   switch (jty) {
     74   case kVoid:
     75     return getJVoidTy();
     76 
     77   case kBoolean:
     78     return getJBooleanTy();
     79 
     80   case kByte:
     81     return getJByteTy();
     82 
     83   case kChar:
     84     return getJCharTy();
     85 
     86   case kShort:
     87     return getJShortTy();
     88 
     89   case kInt:
     90     return getJIntTy();
     91 
     92   case kLong:
     93     return getJLongTy();
     94 
     95   case kFloat:
     96     return getJFloatTy();
     97 
     98   case kDouble:
     99     return getJDoubleTy();
    100 
    101   case kObject:
    102     return getJObjectTy();
    103 
    104   default:
    105     LOG(FATAL) << "Unknown java type: " << jty;
    106     return NULL;
    107   }
    108 }
    109 
    110 ::llvm::StructType* IRBuilder::getShadowFrameTy(uint32_t vreg_size) {
    111   std::string name(StringPrintf("ShadowFrame%u", vreg_size));
    112 
    113   // Try to find the existing struct type definition
    114   if (::llvm::Type* type = module_->getTypeByName(name)) {
    115     CHECK(::llvm::isa< ::llvm::StructType>(type));
    116     return static_cast< ::llvm::StructType*>(type);
    117   }
    118 
    119   // Create new struct type definition
    120   ::llvm::Type* elem_types[] = {
    121     art_frame_type_,
    122     ::llvm::ArrayType::get(getInt32Ty(), vreg_size),
    123   };
    124 
    125   return ::llvm::StructType::create(elem_types, name);
    126 }
    127 
    128 
    129 }  // namespace llvm
    130 }  // namespace art
    131