1 /* 2 * Copyright 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 "bcc/Assert.h" 18 #include "bcc/Renderscript/RSTransforms.h" 19 20 #include <cstdlib> 21 #include <vector> 22 23 #include <llvm/IR/DerivedTypes.h> 24 #include <llvm/IR/Function.h> 25 #include <llvm/IR/Instructions.h> 26 #include <llvm/IR/IRBuilder.h> 27 #include <llvm/IR/Module.h> 28 #include <llvm/Pass.h> 29 #include <llvm/Support/raw_ostream.h> 30 #include <llvm/IR/Type.h> 31 32 #include "bcc/Config/Config.h" 33 #include "bcc/Renderscript/RSInfo.h" 34 #include "bcc/Support/Log.h" 35 36 using namespace bcc; 37 38 namespace { 39 40 /* RSForEachExpandPass - This pass operates on functions that are able to be 41 * called via rsForEach() or "foreach_<NAME>". We create an inner loop for the 42 * ForEach-able function to be invoked over the appropriate data cells of the 43 * input/output allocations (adjusting other relevant parameters as we go). We 44 * support doing this for any ForEach-able compute kernels. The new function 45 * name is the original function name followed by ".expand". Note that we 46 * still generate code for the original function. 47 */ 48 class RSEmbedInfoPass : public llvm::ModulePass { 49 private: 50 static char ID; 51 52 llvm::Module *M; 53 llvm::LLVMContext *C; 54 55 const RSInfo *mInfo; 56 57 public: 58 RSEmbedInfoPass(const RSInfo *info) 59 : ModulePass(ID), 60 mInfo(info) { 61 } 62 63 virtual bool runOnModule(llvm::Module &M) { 64 this->M = &M; 65 C = &M.getContext(); 66 67 std::string str; 68 llvm::raw_string_ostream s(str); 69 70 // We use a simple text format here that the compatibility library can 71 // easily parse. Each section starts out with its name followed by a count. 72 // The count denotes the number of lines to parse for that particular 73 // category. Variables and Functions merely put the appropriate identifier 74 // on the line, while ForEach kernels have the encoded int signature, 75 // followed by a hyphen followed by the identifier (function to look up). 76 // Object Slots are just listed as one integer per line. 77 const RSInfo::ExportVarNameListTy &export_vars = mInfo->getExportVarNames(); 78 s << "exportVarCount: " << (unsigned int) export_vars.size() << "\n"; 79 for (RSInfo::ExportVarNameListTy::const_iterator 80 export_var_iter = export_vars.begin(), 81 export_var_end = export_vars.end(); 82 export_var_iter != export_var_end; export_var_iter++) { 83 s << *export_var_iter << "\n"; 84 } 85 86 const RSInfo::ExportFuncNameListTy &export_funcs = 87 mInfo->getExportFuncNames(); 88 s << "exportFuncCount: " << (unsigned int) export_funcs.size() << "\n"; 89 for (RSInfo::ExportFuncNameListTy::const_iterator 90 export_func_iter = export_funcs.begin(), 91 export_func_end = export_funcs.end(); 92 export_func_iter != export_func_end; export_func_iter++) { 93 s << *export_func_iter << "\n"; 94 } 95 96 const RSInfo::ExportForeachFuncListTy &export_foreach_funcs = 97 mInfo->getExportForeachFuncs(); 98 s << "exportForEachCount: " 99 << (unsigned int) export_foreach_funcs.size() << "\n"; 100 for (RSInfo::ExportForeachFuncListTy::const_iterator 101 foreach_func_iter = export_foreach_funcs.begin(), 102 foreach_func_end = export_foreach_funcs.end(); 103 foreach_func_iter != foreach_func_end; foreach_func_iter++) { 104 std::string name(foreach_func_iter->first); 105 s << foreach_func_iter->second << " - " 106 << foreach_func_iter->first << "\n"; 107 } 108 109 std::vector<unsigned int> object_slot_numbers; 110 unsigned int i = 0; 111 const RSInfo::ObjectSlotListTy &object_slots = mInfo->getObjectSlots(); 112 for (RSInfo::ObjectSlotListTy::const_iterator 113 slots_iter = object_slots.begin(), 114 slots_end = object_slots.end(); 115 slots_iter != slots_end; slots_iter++) { 116 if (*slots_iter) { 117 object_slot_numbers.push_back(i); 118 } 119 i++; 120 } 121 s << "objectSlotCount: " << (unsigned int) object_slot_numbers.size() 122 << "\n"; 123 for (i = 0; i < object_slot_numbers.size(); i++) { 124 s << object_slot_numbers[i] << "\n"; 125 } 126 127 s.flush(); 128 129 // Embed this as the global variable .rs.info so that it will be 130 // accessible from the shared object later. 131 llvm::Constant *Init = llvm::ConstantDataArray::getString(*C, str); 132 llvm::GlobalVariable *InfoGV = 133 new llvm::GlobalVariable(M, Init->getType(), true, 134 llvm::GlobalValue::ExternalLinkage, Init, 135 ".rs.info"); 136 (void) InfoGV; 137 138 return true; 139 } 140 141 virtual const char *getPassName() const { 142 return "Embed Renderscript Info"; 143 } 144 145 }; // end RSEmbedInfoPass 146 147 } // end anonymous namespace 148 149 char RSEmbedInfoPass::ID = 0; 150 151 namespace bcc { 152 153 llvm::ModulePass * 154 createRSEmbedInfoPass(const RSInfo *info) { 155 return new RSEmbedInfoPass(info); 156 } 157 158 } // end namespace bcc 159
