Tim Murray | b7bce74 | 2014-11-03 16:17:30 -0800 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 2014, 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 | |
| 22 | #include <llvm/IR/DataLayout.h> |
| 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/MDBuilder.h> |
| 28 | #include <llvm/IR/Module.h> |
| 29 | #include <llvm/IR/Type.h> |
| 30 | #include <llvm/Pass.h> |
| 31 | #include <llvm/Support/raw_ostream.h> |
| 32 | #include <llvm/Transforms/Utils/BasicBlockUtils.h> |
| 33 | |
| 34 | #include "bcc/Config/Config.h" |
| 35 | #include "bcc/Support/Log.h" |
| 36 | |
| 37 | #include "bcinfo/MetadataExtractor.h" |
| 38 | |
| 39 | using namespace bcc; |
| 40 | |
| 41 | namespace { |
| 42 | |
| 43 | class RSInvokeHelperPass : public llvm::FunctionPass { |
| 44 | private: |
| 45 | static char ID; |
| 46 | |
| 47 | llvm::StructType* rsAllocationType; |
| 48 | llvm::StructType* rsElementType; |
| 49 | llvm::StructType* rsSamplerType; |
| 50 | llvm::StructType* rsScriptType; |
| 51 | llvm::StructType* rsTypeType; |
| 52 | |
| 53 | llvm::Constant* rsAllocationSetObj; |
| 54 | llvm::Constant* rsElementSetObj; |
| 55 | llvm::Constant* rsSamplerSetObj; |
| 56 | llvm::Constant* rsScriptSetObj; |
| 57 | llvm::Constant* rsTypeSetObj; |
| 58 | |
| 59 | |
| 60 | public: |
| 61 | RSInvokeHelperPass() |
| 62 | : FunctionPass(ID) { |
| 63 | |
| 64 | } |
| 65 | |
Stephen Hines | c754d49 | 2015-01-08 16:00:50 -0800 | [diff] [blame^] | 66 | virtual void getAnalysisUsage(llvm::AnalysisUsage &AU) const override { |
| 67 | // This pass does not use any other analysis passes, but it does |
| 68 | // modify the existing functions in the module (thus altering the CFG). |
| 69 | } |
| 70 | |
Tim Murray | b7bce74 | 2014-11-03 16:17:30 -0800 | [diff] [blame] | 71 | virtual bool doInitialization(llvm::Module &M) override { |
| 72 | llvm::FunctionType * SetObjType = nullptr; |
| 73 | llvm::SmallVector<llvm::Type*, 4> rsBaseObj; |
| 74 | rsBaseObj.append(4, llvm::Type::getInt64PtrTy(M.getContext())); |
| 75 | |
| 76 | rsAllocationType = llvm::StructType::create(rsBaseObj, "struct.rs_allocation"); |
| 77 | rsElementType = llvm::StructType::create(rsBaseObj, "struct.rs_element"); |
| 78 | rsSamplerType = llvm::StructType::create(rsBaseObj, "struct.rs_sampler"); |
| 79 | rsScriptType = llvm::StructType::create(rsBaseObj, "struct.rs_script"); |
| 80 | rsTypeType = llvm::StructType::create(rsBaseObj, "struct.rs_type"); |
| 81 | |
| 82 | llvm::SmallVector<llvm::Value*, 1> SetObjParams; |
| 83 | llvm::SmallVector<llvm::Type*, 2> SetObjTypeParams; |
| 84 | |
| 85 | // get rsSetObject(rs_allocation*, rs_allocation*) |
| 86 | // according to AArch64 calling convention, these are both pointers because of the size of the struct |
| 87 | SetObjTypeParams.push_back(rsAllocationType->getPointerTo()); |
| 88 | SetObjTypeParams.push_back(rsAllocationType->getPointerTo()); |
| 89 | SetObjType = llvm::FunctionType::get(llvm::Type::getVoidTy(M.getContext()), SetObjTypeParams, false); |
| 90 | rsAllocationSetObj = M.getOrInsertFunction("_Z11rsSetObjectP13rs_allocationS_", SetObjType); |
| 91 | SetObjTypeParams.clear(); |
| 92 | |
| 93 | SetObjTypeParams.push_back(rsElementType->getPointerTo()); |
| 94 | SetObjTypeParams.push_back(rsElementType->getPointerTo()); |
| 95 | SetObjType = llvm::FunctionType::get(llvm::Type::getVoidTy(M.getContext()), SetObjTypeParams, false); |
| 96 | rsElementSetObj = M.getOrInsertFunction("_Z11rsSetObjectP10rs_elementS_", SetObjType); |
| 97 | SetObjTypeParams.clear(); |
| 98 | |
| 99 | SetObjTypeParams.push_back(rsSamplerType->getPointerTo()); |
| 100 | SetObjTypeParams.push_back(rsSamplerType->getPointerTo()); |
| 101 | SetObjType = llvm::FunctionType::get(llvm::Type::getVoidTy(M.getContext()), SetObjTypeParams, false); |
| 102 | rsSamplerSetObj = M.getOrInsertFunction("_Z11rsSetObjectP10rs_samplerS_", SetObjType); |
| 103 | SetObjTypeParams.clear(); |
| 104 | |
| 105 | SetObjTypeParams.push_back(rsScriptType->getPointerTo()); |
| 106 | SetObjTypeParams.push_back(rsScriptType->getPointerTo()); |
| 107 | SetObjType = llvm::FunctionType::get(llvm::Type::getVoidTy(M.getContext()), SetObjTypeParams, false); |
| 108 | rsScriptSetObj = M.getOrInsertFunction("_Z11rsSetObjectP9rs_scriptS_", SetObjType); |
| 109 | SetObjTypeParams.clear(); |
| 110 | |
| 111 | SetObjTypeParams.push_back(rsTypeType->getPointerTo()); |
| 112 | SetObjTypeParams.push_back(rsTypeType->getPointerTo()); |
| 113 | SetObjType = llvm::FunctionType::get(llvm::Type::getVoidTy(M.getContext()), SetObjTypeParams, false); |
| 114 | rsTypeSetObj = M.getOrInsertFunction("_Z11rsSetObjectP7rs_typeS_", SetObjType); |
| 115 | SetObjTypeParams.clear(); |
| 116 | |
| 117 | return true; |
| 118 | } |
| 119 | |
| 120 | bool insertSetObjectHelper(llvm::CallInst *Call, llvm::Value *V, llvm::StringRef StructName) { |
| 121 | llvm::Constant *SetObj = nullptr; |
| 122 | if (StructName.equals(rsAllocationType->getName())) { |
| 123 | SetObj = rsAllocationSetObj; |
| 124 | } else if (StructName.equals(rsElementType->getName())) { |
| 125 | SetObj = rsElementSetObj; |
| 126 | } else if (StructName.equals(rsSamplerType->getName())) { |
| 127 | SetObj = rsSamplerSetObj; |
| 128 | } else if (StructName.equals(rsScriptType->getName())) { |
| 129 | SetObj = rsScriptSetObj; |
| 130 | } else if (StructName.equals(rsTypeType->getName())) { |
| 131 | SetObj = rsTypeSetObj; |
| 132 | } else { |
| 133 | return false; // this is for graphics types and matrices; do nothing |
| 134 | } |
| 135 | |
| 136 | llvm::SmallVector<llvm::Value*, 2> SetObjParams; |
| 137 | SetObjParams.push_back(V); |
| 138 | SetObjParams.push_back(V); |
| 139 | |
| 140 | llvm::CallInst::Create(SetObj, SetObjParams, "", Call); |
| 141 | return true; |
| 142 | } |
| 143 | |
| 144 | |
| 145 | // this only modifies .helper functions that take certain RS base object types |
| 146 | virtual bool runOnFunction(llvm::Function &F) override { |
| 147 | if (!F.getName().startswith(".helper")) |
| 148 | return false; |
| 149 | |
| 150 | bool changed = false; |
| 151 | const llvm::Function::ArgumentListType &argList(F.getArgumentList()); |
| 152 | bool containsBaseObj = false; |
| 153 | |
| 154 | // .helper methods should have one arg only, an anonymous struct |
| 155 | // that struct may contain BaseObjs |
| 156 | for (auto arg = argList.begin(); arg != argList.end(); arg++) { |
| 157 | llvm::Type *argType = arg->getType(); |
| 158 | if (!argType->isPointerTy() || !argType->getPointerElementType()->isStructTy()) |
| 159 | continue; |
| 160 | |
| 161 | llvm::StructType *argStructType = llvm::dyn_cast<llvm::StructType>(argType->getPointerElementType()); |
| 162 | |
| 163 | for (unsigned int i = 0; i < argStructType->getNumElements(); i++) { |
| 164 | llvm::Type *currentType = argStructType->getElementType(i); |
| 165 | if (currentType->isStructTy() && currentType->getStructName().startswith("struct.rs_")) { |
| 166 | containsBaseObj = true; |
| 167 | } |
| 168 | } |
| 169 | break; |
| 170 | } |
| 171 | |
| 172 | |
| 173 | if (containsBaseObj) { |
| 174 | // modify the thing that should not be |
| 175 | auto &BBList(F.getBasicBlockList()); |
| 176 | for (auto &BB : BBList) { |
| 177 | auto &InstList(BB.getInstList()); |
| 178 | for (auto &Inst : InstList) { |
| 179 | // don't care about anything except call instructions that we didn't already add |
| 180 | if (llvm::CallInst *call = llvm::dyn_cast<llvm::CallInst>(&Inst)) { |
| 181 | for (unsigned int i = 0; i < call->getNumArgOperands(); i++) { |
| 182 | llvm::Value *V = call->getArgOperand(i); |
| 183 | if (V->getType()->isPointerTy() && V->getType()->getPointerElementType()->isStructTy() && |
| 184 | V->getType()->getPointerElementType()->getStructName().startswith("struct.rs_")) { |
| 185 | // get just the object type name with no prefix or suffix |
| 186 | size_t LastDot = V->getType()->getPointerElementType()->getStructName().rfind('.'); |
| 187 | llvm::StringRef StructName = V->getType()->getPointerElementType()->getStructName().slice(0, LastDot); |
| 188 | |
| 189 | // generate the new call instruction and insert it |
| 190 | changed |= insertSetObjectHelper(call, V, StructName); |
| 191 | } |
| 192 | } |
| 193 | } |
| 194 | } |
| 195 | } |
| 196 | } |
| 197 | |
| 198 | return changed; |
| 199 | } |
| 200 | |
Stephen Hines | 5793613 | 2014-11-25 17:54:59 -0800 | [diff] [blame] | 201 | virtual const char *getPassName() const override { |
Tim Murray | b7bce74 | 2014-11-03 16:17:30 -0800 | [diff] [blame] | 202 | return ".helper method expansion for large RS objects"; |
| 203 | } |
| 204 | }; // end RSInvokeHelperPass class |
| 205 | } // end anonymous namespace |
| 206 | |
| 207 | char RSInvokeHelperPass::ID = 0; |
| 208 | |
| 209 | namespace bcc { |
| 210 | |
| 211 | llvm::FunctionPass * |
| 212 | createRSInvokeHelperPass(){ |
| 213 | return new RSInvokeHelperPass(); |
| 214 | } |
| 215 | |
| 216 | } |